Displacement Peak Pressure Z-Transmission 40.6 cm3/r (2.48 in3/r) 380 bar (5500 psi) Compact Hydrostatic Transmission 49.2 cm3/r (3.0 in3/r)
Z-Transmission Table of Contents Introduction and Application Information ........................................................................................................................................ 3 Features and Beneï¬ts ................................................................................................................................................................ 4 - 5 Installation Drawings With 70360 Direct Manual Controlled Pump .................................................................................................................... 6 With 72400 Servo Controlled Pump ................................................................................................................................. 7 Speciï¬cations ................................................................................................................................................................................. 8 Model Code ..............................................................................................................................................................................9 - 10 Performance Data ..........................................................................................................................................................................11 Shaft Options .................................................................................................................................................................................12 Port Identiï¬cation...........................................................................................................................................................................13 Speed Sensor ................................................................................................................................................................................14 Pump Controls Manual Control ................................................................................................................................................................15 Hydraulic Remote Control ...............................................................................................................................................15 Electronic Proportional (EP) Control ..........................................................................................................................16 - 17 Pump Control Forces .....................................................................................................................................................................18 Hydraulic System Design Calculation ............................................................................................................................................19 Component Selection ............................................................................................................................................................ 20 - 21 Hydraulic Fluid Recommendations ........................................................................................................................................ 22 - 23 Viscosity Requirements ......................................................................................................................................................... 24 - 25 2 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Z-Transmission Introduction and Application Information Z-Transmission is a compact axial hydrostatic transmission, which utilizes a variable displacement axial piston pump and ï¬xed displacement axial piston motor connected in closed loop system. Oil is circulated by the pump to the motor and then returned directly back to the pump. A charge supply is used to supplement the closed loop system with oil. The charge flow is supplied by an external source. Advantages Operating Principle The variable displacement piston pump and a ï¬xed displace- System Integration ment piston motor are held together with the help of a center • The mechanical coupling of the variable piston manifold. The end covers of the piston pump and motor are pump and motor provides a compact package with fewer replaced by the center manifold. It provides the internal oil leak paths passages and connects the inlet port of the motor to the outlet port of pump. • Fewer hose connections reduce assembly time. The pump is driven by the prime mover, which generates • A small envelope allows design flexibility. flow to drive the hydraulic motor. The motor is connected to a • Modular construction eases fit-up to a vehicle. gear box. If a ï¬xed pump and ï¬xed motor combination is used • Noise and vibrations are reduced with “drive-by wire” it simply acts as a gear box that transmits power from one rather than mechanical linkages. point to another. A variable pump and ï¬xed motor combina- tion is used to regulate speed and torque. • Infinite output speed range for given engine speed Pressure is built in the system due to the tractive resistance • Operator comfort of vehicle and other auxiliary applications. Direction and rota- • Ergonomic machine design tion of the motor depends on the output flow of the pump. Pump flow depends on the speed and displacement of a Programmable Vehicle Control pump. The displacement of the pump is controlled by the swash plate position. • Joystick or foot pedal command transfer functions are easily tuned to speciï¬cations to provide aggressive or mild vehicle acceleration. • Dynamic hydrostatic braking can be adjusted to provide a more abrupt or a smoother response to operator input. Optional Control System Upgrades • Electronic cruise control can be added to the electro-hy- draulic Compact Z- Transmission system for greater operator comfort and productivity. • Programmable anti-stall prevents engine stalling. Typical applications Agriculture Mid-sized Combine Harvester Compact Tractors Material Handling Lift Trucks Turf care Small Dozers Trenchers Mowers EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 3
Z-Transmission Features and Beneï¬ts Product Identiï¬cation Number – Z-Transmission Stamped on each unit. 7 7 1 2 2 – R A A – 0 2 A – Product Number Description A B C D 77122 = Z-Transmission B – Rotation R = Right Hand L = Left Hand Serial Number Code C – Sequential Letter 10 05 06 XXX 1 000 D – Design Code Number Last Two Digits of Year Built. (10 for 2010 etc.) Specific Number of the Pump Month Built (two digits) Shift Number Day Built (two digits) Manufacturing Cell With 72400 Servo Controlled Pump A - Pump Housing L – Centre Manifold • Durable Cast Iron Design • Houses Pump & Motor Flow Path • Multiple Drain Options • Compact Design B - Pump Swash Plate Cradle • Reduced Plumbing C – Pump Swash Plate • Reduced Leak Paths D – Input Shaft & Mounting M – PTO Shaft • SAE “B” N – Motor Drain Port • Numerous Shaft Options O - Motor Valve plate E – Pump Shaft Seal P – Motor Rotating Group F – Shaft Bearings • 40.6 cm3/r [2.48 in3/r] Displacement G – Swash Plate Bushing • 49.2 cm3/r [3.00 in3/r] Displacement H – Pump Drain Port Q – Motor Shaft Seal I – Pump Rotating Group R – Output / Motor Shaft • 40.6 cm3/r [2.48 in3/r] Displacement S – Motor Bearings • 49.2 cm3/r [3.00 in3/r] Displacement T – Motor Housing J – Pump Valve Plate • Light weight, Aluminum Housing K – High Pressure Relief Valve U – Pump Servo Piston Assembly • Prevents Excessive pressure V – Diagnostic Ports W – Manual Displacement Servo Control Valve W X – Charge Pressure Relief Valve U Y – External Charge Inlet Port V D K X Y 4 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Z-Transmission Features and Beneï¬ts Z-Transmission with 72400 Servo Controlled Pump With 70360 Direct Manual-Controlled Piston Pump 4 2 1 1 - Flange 2 - Cover Plate 3 - Cam Plate Sub-assembly 4 - Bearing 4 3 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 5
Control Shaft Shown at Zero Displacement (Neutral) 17°17° Control Shaft Control Shaft Position - a Position - b D1 (Opt.) T1 45° Z-Transmission Variable Pump 45° PTO Shaft R1 Installation Drawings 19 [.748] Identiï¬cation Label Fixed S1 S2 Motor (Opt.) (Opt.) R2 D5 With 70360 Direct Manual Controlled Pump - AEY Series R3 View D - D T2 View C - C Scale 2/1 128 145 (Opt.) [5.04] [5.71] CC 27.7 [1.09] 261.5 12.7 [10.29] [.50] 215.5 Ø 18.54 C1 [8.48] D [.73] 179.3 B A 140.9 Z-Transmission with Servo Hydraulic Remote Control (HRC) [7.06] [5.55] 5.3 67.8 Ø 23.88 [.21] [2.669] [.94] T3 20 Tooth 24/48 DP 30° Involute Flat Root Class 6 Side Fit 20 Tooth 24/48 DP 30° Involute Spline Per SAE B92.1 16.8 32.3 Flat Root Class 6 Side Fit D [.66] [1.27] Spline Per SAE B92.1 107.2 T1 Va[4.22]riable Pump 69.1 Ø[2.72] 142.7 R1 25.4 PTO Shaft [1.00]Min Full [5.62] Fixed 5.03 Motor R[.198] 122.74 [4.832] Loop - A D5 R2 System PressureR3 Diagnostic Port L M14 X 1.5 14.2 T2 D1 (Opt.) Sy [.56] Loop - A Relief Valve 19.8 38.2 M1 [.78] [1.53] Charge Pressure L 102.9 Diagnostic Port R [4.05] 20 15 Tooth 16/32 DP 30° M8 X 1.25-6H [.79]Min M14 X 1.5 106 Involute Flat Root Class 1 [4.173] Side Fit Spline Per View A - A D2 (Opt.) SAE J498b 10 C1 17.8 [.39] 3 X[.70] B A Z-Transmission with 360 Direct Manual Control 60.3 [2.38] 45 Ø [1.77] Control Shaft Shown at Zero Displacement (Neutral) Identiï¬cation Label 17°17° Control Shaft Control Shaft 12.7 Position - a Position - b [.50] 45° 45° 9.6 Ø[.38]Motor Case Drain 19 [.748] View E - E View C - C 15.931 12.50 View D - D [.492]CC Ø[.6272] Scale 2/1 34 M12 X 1.75-6H261[1.5.34] Min 115 [10.29] 128 145 [4.53] [5.04] [5.71] 55.65.5 21 10.4 Assemble Motor to Backplate 27.7 ØPump Case Drain 9] [.41] [2.1[8.48] with Motor Case Drain [1.09] B Towards Top of 1A79.3ssembly 140.9 12.7 [7.06] [5.55] [.50] 5.3 67.8 87.4 Ø 18.54 [.21] [2.669] 31.5 [3.44] D [.73] 77.7 [1.24] [3.06] 64.4 79.4 Ø 23.88 Tee From Cooler Inlet ooth 24/48 DP 30° Involute 20 T [2.54] [3.13] [.94] M22 X 1.5 Flat Root Class 6 Side Fit 20 T Spline Per SAE B92.1 Flat R 33 12.7 [1.30] [.50] 16.8 32.3 70.1 D [.66] [1.27] 91.9 [2.76] EE 224 100.97 107.2 [8.82] [3.975] [3.62] 69.1248 [4.22] Ø[2.72]64] [9.7 25.4 175.6 142.7 [1.00]Min Full [6.91] [5.62] Return from Cooler M22 X 1.5 5.03 R[.198] 122.74 [4.832] Loop - A System Pressure Filter Mount Diagnostic Port 1.375 - 12 UNF - 2A Loop - B 13 M14 X 1.5 14.2 4 x ØThru System Pressure [.512] [.56] Loop - A 15.931 13 Diagnostic Port 11.13 Relief Valve 19.8 Ø[.6272] [.51] 38.2 M14 X 1.5 [.438] [.78] 13 [1.53] ØThru 98 Charge Pressure 40 Loop - B 102.9 [.512] [3.86] Diagnostic Port [1.575] Relief Valve [4.05] 11.2 M14 X 1.5 3 X R 15.5 100 106 R[.44] Shown [.61] [4.37] [4.173] 20 View A - A 285.8 15 Tooth 16/32 DP 30° M8 X 1.25-6H [.79]Min [11.25] Involute Flat Root Class 1 View B - B Side Fit Spline Per SAE J498b 10 17.8 3 XDimensions are in millimeters [inches], unless otherwise speciï¬ed. [.39] [.70] B 60.3 [2.38] 45 6 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 Ø [1.77]
Z-Transmission Installation Drawings With 72400 Servo Controlled Pump - AEZ Series T3 R1 - Relief valve for port A R2 - Relief valve for port B 12.7 R3 - Charge pressure relief valve [.50] S1, S2 - Pump servo control ports C1 - External charge inlet port T1 T1 - Diagnostic port for main port A T2 - Diagnostic port for main port B 12.7 R1 T3 - Diagnostic port for charge flow [.50] 9.6 R1 - Relief valve for port A D1, D2 - Drain port pump (optional) R3 Ø[.38]Motor Case Drain D5 - Drain port motor Fixed R2 - Relief valve for port B Motor View C-C R3 - Charge pressure relief valve S2 S1 9.6 Ø(Opt.)Motor Case Drain S1, S2 - Pump servo control ports (Opt.) [.38] Variable Pump D5 R2 C1 - External charge inlet port View C-C T1 - Diagnostic port for main port A PTO Shaft T2 T2 - Diagnostic port for main port B 12.7 [.50] T3 - Diagnostic port for charge flow D1 (Opt.) D1, D2 - Drain port pump (optional) R3 D5 - Drain port motor 9.6 D2 (Opt.) Ø[.38]Motor Case Drain C1 S2 Z-Transmission with Servo Manual Control S1 View C-C 138 D (Opt.) (Opt.) [5.43] D2 (Opt.) T3 Variable Pump D 70 [2.76] 42.8 [1.68] 88 Loop - A Relief Valve 6.4PT D1 (Opt.) 40.45 132.1 [3.46] [1.593] [.25] 12.27 [5.20] 6.4 2 X Ø 10.024 [.3946] Loop - B RT1elief Valve 35 [.483] [.25] Variable Pump Holes Marked 6.5 1 Z [1.3780 16.5 [.65] Assemble Motor to Backplate PTO Shaft [.65] with Motor Case Drain Towards R1 50.8 Top of Assembly 50.8 D1 (Opt.) [2.00]Ø[.25]31.8ump Case Drain 6.4 P Fixed [2.00] 31.8 [1.25] S2 18.5 Motor [1S1.25] 2X M10 X 1.5-6H (Opt.) (Opt.) [.73] D 75 R2 [2.95] D5 6.524.5 6.5 R3 60 82 2 x Ø[.256][.96] B 2 x Ø[.256] D2 (Opt.) [2.36] [3.2284] T2 Loop - A Relief Valve 132.1 [5.20] 6.4 39 (Opt.) Loop - B Relief Valve 6 [.24]Z-T [.25] [1.54] 71 16.5 70.76 71 A B A [2.80] [.65] [2.786] [2.80] 89 A 125 D2 (Opt.) [3.50] 50.8 [4.92] D [2.00] 31.8 36 D [1.42] [1.25] C1 146 36 153 [5.748] [1.42] Z-Transmission with Servo Hydraulic Remote Control (HRC) [6.02] A T3 6.5 A D1 (Opt.) B 2 x Ø[.256] 117.3 146.6 5 X Ø 11 [.434] Thru [4.62] 40 [1.57] [5.77] Va 117.3 123.4 12 [.4724] [4.62] Variable Pum[4.86] T1 55 [2.17] 71 p RH (Clockwise) Pump 123.4 282Input Shaft RoR1tation A [2.80] [4.13] 105 110 [4.33] B[4.86] PTO Shaf1.t10] [1 107.5 RH (Cloc 125 [4.23] Fixed Input Shaft Motor Output Shaft Rotation D 179.3 Facing Rear of Tractorr Moto 36 67.8A S1 S2 [7.06] [1.42] Loop - [2.669]stem Pressure Sy 146 282 (Opt.) (Opt.) Diagnostic Port [5.748] [11.10] M14 X 1.5 D5 107.5 R2 Facing R R3 Loop - A 2.27 [4.23] A Loop - B System Pressure 179.3 67.8 System Pressure ull T2 Diagnostic Port 20.6 Min FD1 (Opt.) [2.669]Charge Pressure [7.06] [.81] Diagnostic Port M14 X 1.5 Inlet Port 6.4 M14 X 1.5 13 Tooth 16/32 DP M22 X 1.5 Per ISO 6149-1 [.25] 30° Involute Flat 1L46.6oop - B 117.3 Root Class 1 Side 20 37.6 System Pressure [4.62] Fit Spline Per [.79] [1.48] [5.77]Diagnostic Port Vieull 123.4 M14 X 1.5 SAE J498bView A - A 20.6 Min Fw B - B [.81] [4.86] 43.7 6.4 13D2 (Opt.)ooth 16/32 DP T Ø[1.72] [.25] RH (Clockwise) Pump 20 30° Involute Flat Front of Tractor C1 Front of Tractor [.79] Root Class 1 Side Input Shaft Rotation(Opt.) Fit Spline Per Z-Transmission with 360 Direct Manual Contro Tlooth 16/32 DP 30° 15 View A - A Vie SAE J498b Involute Flat Root Class 1 Side Fit Spline Per 43.7 SAE J498b Ø[1.72] Facing Rront of ear of ractorractor T F T F Loop - A System Pressure 15 Tooth 16/32 DP 30°Diagnostic Port Involute Flat RM1oot Class 1 4 X 1.5 E E Side Fit Spline Per Loop - B nvolute SAE J498b System Pressure Charge Pressure 4° 4° AE J498b Diagnostic Port Lever Lever Inlet Port M14 X 1.5 Overstroke Overstroke 2°30” Z-T M22 X 1.5 Per ISO 6149-1 2°30” E E Neutral Neutral Zone 20 37.6 Zone 15 Tooth 16/32 DP 30° Involute [.79] [1.48] Flat Root Class 1 Side Fit 28° 28°4° 4°Vierw A - A View B - B Spline Per SAE J498b Lever LeveLeverr Leve Position - b OvPerstrokosition - a e Overstroke 2°30” 2°30” Neutral Neutral Zone Front of Tractor Front of Tractor Zone View D - D Rotated 29°46” CCW 28° 28° Lever Lever Position - b Position - a Dimensions are in millimeters [inches], unless otherwise speciï¬ed. Front of Tractor View D - D Rotated 29°46” CCW EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 Variable Pump 7 Front of Tractor
Z-Transmission Speciï¬cations Speciï¬cations Two types of Pump control options are available: • Manual Direct (with 70360 series Pump) with fixed displacement motor • Manual Servo (with 72400 series Pump) with fixed displacement motor Pump Series Motor Series 70360 70360 72400 72400 74318 74328 Displacement – cc/rev (in3/rev) 40.6 (2.48) 49.2 (3.0) 40.6 (2.48) 49.2 (3.0) 40.6 (2.48) 49.2 (3.00)** Input Mounting Flange – SAE B B B Max Speed – RPM 3600 3600 3600 3000 Nominal Pressure - Bar (PSI) † 345 (5000) 345 (5000) 345 (5000) Peak Pressure - Bar (PSI) † † 441 (6400) 441 (6400) 441 (6400) Controls Direct Manual Manual Servo*, Electronic – Proportional, Hydraulic Remote, Proportional Solenoid* Additional Features – – Diagnostic ports, – – Cooler bypass valve**, Filter bypass valve** At Max Speed & Nominal Pressure – – 59 (79) 59 (79) Max-Output Power KW (HP) – – 156 (1383) 189 (1672) Max- Output Torque Nm (lbf-in) Weight (kg) 52 52 Input Shaft- External splines 20T (ANSI B92.1) 15T (SAE J498b) – – PTO Shaft - External splines 20T (ANSI B92.1) 13T (SAE J498b) – – Output Shaft - External splines – – – – 15T (SAE J498b) Speed Sensor Not Available Available – Temperature - °C (°F) 107 (225) – 107 (225) – 107 (225) – Continuous Allowable Case 2 (25) – 2 (25) – 2 (25) – Pressure - Bar (PSI) External Charge Pump Displacement - 8.2 (0.5) 9.84 (0.6) 8.2 (0.5) 9.84 (0.6) – – cc / rev (in3 / rev) *** Charge Relief Settings (Range) - 6.89 – 20.68 13.79 – 20.68 – – Bar (PSI) (100 – 300) (200 – 300) * Manual Servo Control with additional control features and Solenoid Control are available on request ** Available on request *** Contact Eaton representative for speciï¬c requirements. † Nominal Pressure: Max. delta system pressure at which component fatigue does not occur (pump life estimated by bearing life). † † Peak Pressure: Max. operation pressure which is permissible for a short duration of time (t < 1 sec). 8 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Z-Transmission Model Code AEY 40 L B A A 0 1 1 2 M M B M0 0 D D 0 40 A 1 A 0 0A 0 B 1,2,3 4,5 6 7 8 9 10 11 12 13 14 15 16 17, 1 8 19 20 21 22 23,24 25 26 27 28 29,30 31 32 11 15 1 2 3 Code Title Charge Relief Setting Relief Valve Setting for 20 Control Supply Oriï¬ce And Routing Main Port B (p) AEY - Z-Transmission with Direct Manul Controlled Vari- 0 - No Charge Relief Valve 0 - Check Valve Only 0 - No Control Supply Orifice able Displacement Pump 1 - 17.24-20.68 Bar [250-300 A - 103 bar [1500 lbf/in2] A - Diameter 0.53 [.021] AEZ - Z-Transmission with Lbf/In2] Relieved To Case B - 120.7 bar [1750 lbf/in2] B - Diameter 0.61 [.024] Servo Controlled Variable C - 137.9 bar [2000 lbf/in2] C - Diameter 0.71 [.028] Displacement Pump D - 155.1 bar [2250 lbf/in2] D - Diameter 0.81 [.032] 12 E - 172.4 bar [2500 lbf/in2] E - Diameter 0.91 [.036] External Charge Inlet F - 189.6 bar [2750 lbf/in2] F - Diameter 1.02 [.040] Port 4 5 G - 206.8 bar [3000 lbf/in2] G - Diameter 1.12 [.044] Displacement - H - 224.1 bar [3250 lbf/in2] H - Diameter 1.32 [.052] Pump 1 - M22X 1.5 PER ISO 6149-1 J - 241.3 bar [3500 lbf/in2] J - Diameter 1.45 [.057] K - 258.6 bar [3750 lbf/in2] K - Diameter 1.65 [.065] 40 - 40.6 cm3/r [2.48 in3/r] L - 275.8 bar [4000 lbf/in2] L - Diameter 1.85 [.073] 49 - 49.2 cm3/r [3.00 in3/r] Drain Port Size And 13 M - 293.0 bar [4250 lbf/in2] Location - Pump N - 310.3 bar [4500 lbf/in2] 21 P - 327.5 bar [4750 lbf/in2] Control Supply Oriï¬ce 6 Input Shaft Rotation 1 - .750-16 UNF-2B SAE R - 344.7 bar [5000 lbf/in2] (p) O-Ring Port - Left (D1), S - 379.2 bar [5500 lbf/in2] L - Left Hand Rotation (ccw) Plugged; Right (D2), Plugged; T - 413.7 bar [6000 lbf/in2] 0 - No Control Servo Orifice R - Right Hand Rotation (cw) Thru Drain Into Motor A - Diameter 0.53 [.021] 2 - .750-16 Unf-2B SAE O- B - Diameter 0.61 [.024] Ring Port, Left (D1), Plugged; 16 Special Features C - Diameter 0.71 [.028] Right (D2), Plugged; Thru 7 Front Mounting (Pump) D - Diameter 0.81 [.032] Drain Into Motor E - Diameter 0.91 [.036] B - 2 Bolt B (SAE J744-101-2) 0 - No Special Features F - Diameter 1.02 [.040] 14 D - Speed Sensor (For AEZ G - Diameter 1.12 [.044] Relief Valve Setting For Series) H - Diameter 1.32 [.052] Main Port A Pump Input Shaft 8 J - Diameter 1.45 [.057] K - Diameter 1.65 [.065] 0 - Check Valve Only A - SAE 15 Tooth 16/32 Ex- L - Diameter 1.85 [.073] 1 7, 1 8 Pump Control Options A - 103 bar [1500 lbf/in2] ternal, Dia. 24.98 [.984] M - Diameter 0.71 [.028](s1), B - 120.7 bar [1750 lbf/in2] B - SAE 20 Tooth 24/48 Ex- No Control Servo Orifice(s2) DM - Direct Manual Control C - 137.9 bar [2000 lbf/in2] ternal, Dia. 22.225 [.8750] N - Diameter 0.91 [.036](s1), *M0 - Manual Servo Control, D - 155.1 bar [2250 lbf/in2] No Control Servo Orifice(s2) No Additional Features E - 172.4 bar [2500 lbf/in2] *HA - Hydraulic Remote with F - 189.6 bar [2750 lbf/in2] 9 PTO (Pump Output) 5 -15 bar [72-217 lbf/in2] Pilot G - 206.8 bar [3000 lbf/in2] Shaft Pressure Range, 2X .4375-20 Special Control Options 22 H - 224.1 bar [3250 lbf/in2] UNF-2B SAE O-Ring Port J - 241.3 bar [3500 lbf/in2] A - SAE 13 Tooth 16/32 Ex- *EP - Electronic Proportional 0 - No Special Control Op- K - 258.6 bar [3750 lbf/in2] ternal, Dia. 21.81 [.858], 20.6 Control 12 VDC without elec- tions L - 275.8 bar [4000 lbf/in2] [.81] Min. Full Spine tronic driver, with Deutsch M - 293.0 bar [4250 lbf/in2] B - SAE 20 Tooth 24/48 Ex- connector, with ï¬ne hi-gain N - 310.3 bar [4500 lbf/in2] ternal, Dia. 22.00 [.866], 5.4 control metering P - 327.5 bar [4750 lbf/in2] 23,24 Motor Displacement [.21] Min Full Spline R - 344.7 bar [5000 lbf/in2] * Available only with "AEZ" series. S - 379.2 bar [5500 lbf/in2] 40 - 40.6 cm3/r [2.48 in3/r] T - 413.7 bar [6000 lbf/in2] Fixed Displacement Axial 10 Charge Pump Piston Motor 19 Destroke Valve 0 - No Charge Pump 0 - No-Destroke Valve EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 9
Z-Transmission Model Code AEY 40 L B A A 0 1 1 2 M M B M0 0 D D 0 40 A 1 A 0 0A 0 B 1,2,3 4,5 6 7 8 9 10 11 12 13 14 15 16 17, 1 8 19 20 21 22 23,24 25 26 27 28 29,30 31 32 29,30 25 Motor Output Shaft Paint A - SAE 15 Tooth 16/32 Ex- 00 - Do Not Paint ternal, Dia. 24.98 [.984] 0A - Red Oxide Primer CD - Blue (Eaton Standard) 26 Drain Ports Size and 31 Location (Motor) Identiï¬cation 1 - Dia 9.6 [.38] Port (D5) -Re- 0 - Standard lieved To Reservior / Housing 32 Design Code 27 Special Features (Mo- tor) B - B 0 - No Special Features 28 Additional Features 0 - No Additional Features 10 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Z-Transmission Performance Data The charts below are representative of a “AEZ” series Z-trans with 49.2 cm3/r [3.00 in3/r] servo variable pump and 40.6 cm3/r [2.48 in3/r] ï¬xed mo- tor. The tests were run at an oil temperature of 82°C [180°F] with viscosity at 9 - 12 cSt [54 - 66 SUS]. EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 11
Z-Transmission Shaft Options Pump Input Shaft Power Take Off (PTO) Shaft Code Position 8 Code Position 9 Selection - A 15T Selection - A 13T Max. input torque 338 N-m [2987 lbf-in] Max. output torque - 210 N-m [1859 lbf-in] 6.4 [.25] 20.6 Min Full [.81] Splines 43.7 Ø [1.72] 13 Tooth 16/32 DP 30° Involute Flat Root Class 1 Side Fit Spline Per SAE J498b Selection - B 20T Selection - B 20T 46 Min Full Max. output torque- 243 N-m [2151 lbf-in] Max. input torque 243 N-m [2151 lbf-in] [1.81] Splines 25.4 Min Full [1.00] Splines 69.1 Ø[2.72] 6.4 [.25] 20.6 15 Tooth 16/32 DP 30° Involute Min Full 20 Tooth 24/48 DP 30º Involute 20 Tooth 24/48 DP 30° Involute[.81] Flat Root Class 1 Side Fit Splines Falt Root, Calss 6 Flat Root Class 6 Side Fit Spline Per SAE J498b 43.7 Side Fit Spline Per ANSI B92.1 Spline Per ANSI B92.1 Ø [1.72] 5.3 [.21] Motor Output Shaft 13 Tooth 16/32 DP 30° Inv Flat Root Class 1 Side Fit Code Position 25 Spline Per SAE J498b Selection - A 15T Max. output torque – 338 N-m [2991 lbf-in] 46 Min Full [1.81] Splines 15 Tooth 16/32 DP 30° Involute Flat Root Class 1 Side Fit Spline Per SAE J498b Dimensions are in millimeters [inches], unless otherwise speciï¬ed. 12 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Z-Transmission Catalog Port Identiï¬cation Mating Connector 128.78 [5.07] 11.94 Pump Drain Port- (D2) 9.6 [.38] [0.47] Assemble motor to back plate with motor drain port toward top of the assembly Detail A 94.74 [3.73] 151.31 [5.957] Loop - A 123.33 System Pressure [4.855] Diagnostic Port M14X 1.5 Loop - B Pump Drain Port- (D2) System Pressure Detail A Right Side Diagnostic Port 1 1/16 UN-2B M14X 1.5 SAE O-Ring Port 94.69 [3.728] 198.88 External Charge 30 [7.83] Inlet Port- (C1) M22X 1.5 Dimensions are in millimeters [inches], unless otherwise speciï¬ed. EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 13
Z-Transmission Speed Sensor Code Position 16, Selection D Mating Packard Connector Connector Body – 1216 2192 Connector Seal – 1204 0750 Cable Seal – 1204 0751 Socket – 1212 4075 Optional Mating Connectors Connector Assembly (Body, Cable Seal, Seal) – 1216 2193 Socket (16 – 18 AWG) – 1212 4075 Socket (20 – 22 AWG) – 1212 4076 Mating Connector 128.78 [5.07] Parameter Condition Value Operating Temperature Limit -40 to 150°C [-40 to 302° F ] Sensor Resistance 25°C (77° F) 1.5 K To 3.5 K Ohms Sensor Inductance 25°C (77° F) 0.6 to 3.7 H Output Voltage 25°C (77° F) 9.3 Hz @ 2.29mm [.090 inch] Gap 400 mVpp Min 300 Hz @ 0.25mm [.010 inch] Gap 80 Vpp Max. Air Gaps 0.26 to 2.28 [ .010 to .090 ] mm [inch] Vibration Voltage 15G random Vibration 0.4V P-P Max Dimensions are in millimeters [inches], unless otherwise speciï¬ed. 14 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Z-Transmission - Pump Controls Manual Control Code Position 17, 18 Selection M0 T3 R1 - Relief valve for port A R2 - Relief valve for port B R3 - Charge pressure relief valve S1, S2 - Pump servo control ports C1 - External charge inlet port T1 T1 - Diagnostic port for main port A T2 - Diagnostic port for main port B R1 T3 - Diagnostic port for charge flow D1, D2 - Drain port pump (optional) R3 D5 - Drain port motor Fixed Motor S2 S1 Control Lever Travel Standard Band Wide Band (Opt.) (Opt.) *Neutral Detent Feature Variable Pump D5 R2 Neutral Zone 2.5° 4.0° The neutral detent provides a positive, centered feeling to the PTO Shaft T2 Maximum Displacement 25.5° 25.5° handle, signaling the operator when the pump is in neutral Maximum Over Travel 4.0° 2.5° position.D1 (Opt.) D2 (Opt.) C1 Hydraulic Remote Control Z-Transmission with Servo Manual Control D2 (Opt.) T3 Code Position 17, 18 Selection HA D1 (Opt.) T1 T3 Variable Pump PTO Shaft R1 - Relief valve for port A R1 R2 - Relief valve for port B Fixed R3 - Charge pressure relief valve S1 S2 Motor (Opt.) (Opt.) S1, S2 - Pump servo control ports C1 - External charge inlet port R2 D5 T1 - Diagnostic port for main port A R3 T2 - Diagnostic port for main port B T2 R1 T3 - Diagnostic port for charge flow D1, D2 - Drain port pump (optional) R3 (Opt.) D5 - Drain port motor S2 S1 (Opt.) (Opt.) C1 * Variable Pump Z-Transmission with Servo Hydraulic Remote Control (HRC) R2 NOTE T3 PTO Shaft 1. Right Hand (Clockwise) Rotation Pilot Press Port -1 Pressurized...flow From System Press Port -B Pilot Press Port -2 Pressurized...flow From System Press Port -A T1 Variable Pump D1 (Opt.)Left Hand (Counter Clockwise) Rotation Pilot Press Port -1 Pressurized...flow From System Press Port -A R1 PTO Shaft Pilot Press Port -2 Pressurized...flow From System Press Port -B Fixed r 2. Nominal Threshold Pressure ............ 5 bar Moto[72.5 PSI] Nominal Max Displacement PressureD2 (Opt.) 15 bar [217.6C1PSI] ..... D5 R2 R3 * Do not touch any of the Control adjustment nuts which are factory set. Z-T T2 D1 (Opt.) D2 (Opt.) T3 D2 (Opt.) C1 D1 (Opt.) Z-Transmission with 360 Direct Manual Control Variable Pump Hydraulic Remote Control Conversion Kit PT t Order Part Number 72400-919 Includes: Control sub-assemblyO Shaf(1pc), Socket head cap screws (6 pc), Control housing gasket (1pc) S1 S2 (Opt.) (Opt.) EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 15
Z-Transmission - Pump Controls Electronic Proportional Displacement Control Code Position 17,18 Selection EP The Electronic Proportional (EP) displacement control is ideal The control driver module converts a command input signal for applications requiring electronic pump displacement to a proportional current output to the proportional solenoids control. The EP displacement control provides the flexibil- resulting in a proportional pump displacement. ity of three command input choices. Control components The EP displacement control has been designed to withstand include a proportional solenoid actuated valve assembly and the rigors of off-highway equipment environmental condi- an electronic solenoid driver module mounted on the pump. tions. EP Displacement Control Features • SAE J1455 - Recommended Environmental Practices for • Ease of installation Electronic Equipment Design • Automotive style environmentally sealed Metri-Pack con- • Humidity/Temperature Extreme Cycling nectors • Salt Spray • Operates from 12 or 24 Vdc power supply • Splash & Immersion • External fuse (customer supplied): 3A for 12 Vdc system, 1A for 24 Vdc system • Steam Cleaning/High Pressure Wash • Three choices for command input signal • Vibration • Operating temperature range -40° C to +85° C • Mechanical Shock • Control driver module encapsulated for environmental • Temperature Cycling protection • Load Dump Transients • Closed loop current control compensates for resistance • Inductive Load Switching Transients change of the proportional solenoids due to temperature variations • SAE J1113 - Electromagnetic Susceptibility Measurement Procedures for Vehicle Components • Return to neutral for loss of power, or loss of command input signal • EMI/EMC - Conducted & Radiated Immunity • Mechanical feedback of swashplate position for closed loop • CISPR 25 - International Electrotechnical Commission “Lim- control its and Methods of Measurement of Radio Disturbance Characteristics for the Protection of Receivers used on • External neutral adjustment Board Vehicles”. • Manual override capability • EMI /EMC - Conducted & Radiated Emissions • Control drive module qualification per SAE J1455, SAE J1113, CISPR 25 Solenoid Actuated Valve Assembly 16 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
167,2 [6.58] Proportional Proportional 90,7 Solenoid #2 Solenoid #1 [3.57] Centerline of drive shaft Z-Transmission - Pump Controls 2X Manual Overide, Push to activate manual override. Electronic Proportional Displacement Control Code Position 17,18 Selection EP Note: In order to assure the most reliable installation and General Relationship between Command Signal Input and Pump Flow operation of any electronic control, proper installation meth- A Port Flow 100% ods should be followed with respect to interconnection wiring CCW Rotation Pump harness, command signal devices, fusing, and input power switching. Proper care should be taken to prevent damage to all electrical and electronic components due to abrasion, moving objects, heat, moisture or other environmental hazards. For safety critical applications, Eaton recommends that a switch be installed in line with (+ Battery) power to the module so that power may quickly be disconnected in case of emergency. A 2 ampere slow blow fuse should always be installed in the + battery line. It is recommended that during Command Signal input initial start-up and checkout, the machine be placed on jack A C stands to prevent inadvertent movement of the machine. B DE Operating Range Neutral Range Operating Range Command Input ( A max) B (min) C D (min) E Signal 1 to 6 Vdc 1.5 Vdc 3.3 Vdc 3.5 Vdc 3.7 Vdc 5.5 Vdc 4-20 mA* -20 mA -4.5 mA 0 mA +4.5 mA +20 mA ±100 mA -100 mA -7.5 mA 0 mA +7.5 mA +100 mA *Note: The +20 mA command input signal conï¬guration operates the pumps in one direction. The customer has to change the polarity on the -20 mA signal to operate the pump in B Port Flow 100% the opposite direction. CCW Pump Rotation Electronic Proportional Valve Control Guidelines Parameter 12 VDC 24 VDC Signal Input * Resistance at 25°C - Ohm 5.19 ± 10% 20.80 ± 10% Nominal Inductance 17.5 mH 27.7 mH Current (I) at Neutral - Amp < 0.4 <0.2 Current (I) at Full Displacement – Amp (max continuous) 1.5A 0.75A Operating Limits Temperature Ratings -65°F Min to 140°F Max Power Consumption 28W Max *Coils have no internal diodes, polarity does not affect performance. Signal Proï¬le PWM Conï¬guration Closed loop current control of the solenoid current via PWM duty-cycle variation. Note: Coil currents must be limited to not exceed solenoid coil speciï¬cations Frequency: 70-200Hz (100Hz recommended when PWM driver does not have built-in dither capabilities) Dither Signal The design must provide for a separate dither signal to be added to the input command. Waveform: Square Frequency: 75 (+ 25,-15) Hz Amplitude: .250 +.100 -.050A pk-pk EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 17
Z-Transmission Pump Control Forces For 70360 Direct Manual Controlled Pump 18 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Design Calculations Z-Transmission Hydraulic System Design Calculations Basic Formulas Efficiencies gpm actual Volumetric Nv = gpm theorectical Output Flow (Q) lb-in actual Mechanical Nm = lpm = cm3/r x rpm gpm = in3/r x rpm lb-in theorectical 1000 231 Total Nt = Nv x Nm Input Power (P) Q l/min x bar gpm x psi p kW = hp = 600 1714 n P Shaft Torque (M) M 3 N-m = bar x cm /r psi x in3/r lb-in = 62.8 6.28 Shaft Speed (n) rpm = 1 000 x 1/min RPM = 231 x gpm cm3/r in3/r Commonly Used Conversions Output Power (P) To Convert Into Multiply by bar psi 14.5 kW = N-m x RPM lb-in x rpm hp = cm3 in3 0.06102 9549 63,025 ËšC ËšF (ËšC x 1.8) +32 Volumetric Displacement gallons (US) liters 3.785 kg lbs 2.205 cm3/r = 1000 lpm x gpm x 231 in3/r = kgf/cm2 psi 14.2 rpm rpm kW hp 1.341 liters US Gallons 0.2642 Basic Formulas mm inches 0.03937 bar = 10 Newtons/cm2 N-m lb-in 8.85 gpm = gallons per minute N-m lb-ft 0.7375 hp = horsepower ËšF ËšC (ËšF-32)/1.8 lb-in = pound inch hp kW 0.7457 lb-ft = pound feet inch mm 2.54 kW = kilowatt in3 cm3 16.39 kgf = kilograms force lb-in N-m 0.113 l/min = liters per minute lb-ft N-m 1.356 N-m = Newton meters lbs kg 0.4535 psi = pounds per square inch psi bar 0.06896 rpm = revolutions per minute psi kgf/cm2 .070307 Note: Performance charts can be found on subsequent pages. 4 EATON Vickers PVH Industrial and Mobile Variable Displacement Piston Pumps V-PUPI-TM008-E February 2009 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 19
Z-Transmission Component Selection The long service life of Eaton hydrostatic transmissions is A sixty mesh screen placed across the suction chamber of largely dependent on the proper selection and installation of the reservoir will act as a bubble separator. The screen should the components necessary for transmission operation. be placed at a 30° angle to the horizon. The entrance to the suction line should be located well below the fluid surface so The following components are necessary for transmission there is no chance of air being drawn into the charge pump in- operation: let. However, the suction line entrance should not be located 1. Variable Displacement Pump on the bottom of the reservoir where there may be a buildup of sediment. The suction line entrance should be flared and 2. Fixed or Variable Displacement Motor covered with a screen. 3. Reservoir The reservoir should be easily accessible. The ï¬ll port should 4. Filter be designed to minimize the possibility of contamination 5. Charge Pump Inlet Line during ï¬lling and to help prevent over ï¬lling. There should be a drain plug at the lowest point of the reservoir and it should 6. Pump and Motor Case Drain Lines also have a clean-out and inspection cover so the reservoir 7. High Pressure Lines can be thoroughly cleaned after prolonged use. A vented res- 8. Heat Exchanger ervoir should have a breather cap with a micronic ï¬lter. 9. Heat Exchanger Bypass Valve Sealed reservoirs must be used at altitudes above 2500 feet. 10. Reservoir Return Line These reservoirs should be ï¬tted with a two- way micronic ï¬l- ter pressure cap to allow for fluid expansion and contraction. Variable Displacement Pump In both cases the caps must be designed to prevent water Eaton hydrostatic variable displacement pumps are an axial from entering the reservoir during bad weather or machine piston design. They are equipped with standard SAE mounts, washing. shafts and port connections. A hydrostatic transmission with a well designed reservoir will run quieter, stay cleaner and last longer. Fixed or Variable Displacement Motor Eaton hydrostatic motors are an axial piston design. They are Charge Pump Inlet Line equipped with standard SAE mounts, shafts and port connec- The inlet line to the charge pump should be large enough to tions. keep the pressure drop between the reservoir and charge pump inlet within the limits described in the ï¬lter section. Fit- Reservoir tings will increase the pressure drop, so their number should The reservoir is an important part of the hydrostatic transmis- be kept to a minimum. It is best to keep fluid velocities below sion system. It should provide adequate oil storage and allow 1,25 meters [4 feet] per second. easy oil maintenance. Fluid and temperature compatibility must be considered when The reservoir must hold enough oil to provide a continuous selecting the inlet line. oil supply to the charge pump inlet. It must also have enough room for the hydraulic oil to expand as the system warms up. Pump and Motor Case Drain Consider charge pump flow when sizing the reservoir: One The case drain lines should be large enough to limit the pump half (.5) minute times (X) the maximum charge pump flow and motor case pressures (Medium Duty to 2 bar [25 PSI]) at should be the minimum oil volume in the reservoir. Maintain- normal operating temperatures. Fluid and temperature com- ing this oil volume will give the oil a minimum of thirty (30) patibility must also be considered when selecting the case seconds in the reservoir. This will allow any entrained air to drain lines. escape and contamination to settle out of the oil. To allow for oil expansion, the reservoir’s total volume should Heat Exchanger be at least six tenths (.6) minute times (X) the maximum Use of a heat exchanger is dependent on the transmission’s charge pump flow. duty cycle and on machine layout. The normal continuous The reservoir’s internal structure should cut down turbulence operating fluid temperature measured in the pump and motor and prevent oil aeration. cases should not exceed 80½ºC [180½ºF] for most hydraulic fluids. The maximum fluid temperature should not exceed The line returning flow to the reservoir should be ï¬tted with 107½ºC [225½ºF]. a diffuser to slow the incoming oil to 1 to 1.2 meters [3-4 feet] per second to help reduce turbulence. The return flow The heat exchanger should be sized to dissipate 25% of the line should also be positioned so that returning oil enters the maximum input power available to the transmission. It must reservoir below the liquid surface. This will help reduce aera- also be sized to prevent the case pressures in the pump and tion and foaming of the oil. The reservoir should have baffles motor from getting too high. Medium duty case pressure up between the return line and suction line. Baffles prevent to 2 bar [25 psi], at normal operating temperatures, are ac- return flow from immediately reentering the pump. ceptable. 20 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Z-Transmission Component Selection Heat Exchanger Bypass Valve The heat exchanger bypass valve is a pressure and/or tem- perature valve in parallel with the heat exchanger. Its purpose is to prevent case pressures from getting too high. The heat exchanger bypass valve opens when the oil is thick, espe- cially during cold starts. Reservoir Return Line The same general requirements that apply to case drain lines apply to the reservoir return line. Startup Requirements The mounting orientation of pumps and motors is unrestrict- ed provided the case drain of the pump and motor remain full. Position the case drain such that it assures an oil level at or above unit center line at start-up. The case drain line that car- ries the flow leaving the pump or motor should be connected to the highest drain port on each of the units. This assures that the pump and motor cases remain full. The combined torque required to turn two or more pumps must not exceed the torque rating of the input drive shaft of the front piston pump. Installer to provide centering and a secure neutral for pump swash plate control shaft. An external support is recommended for all tandems EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 21
Z-Transmission Hydraulic Fluid Recommendations Introduction Environment Friendly Hydraulic Fluids Oil in hydraulic system performs the dual function of lubri- Environmental friendliness is becoming a critical need and a cation and transmission of power. It is a vital element in a number of biodegradable hydraulic fluids are being used more hydraulic system, and careful selection should be made with and more in environment sensitive areas. the assistance of a reputable supplier. Proper selection of Biodegradable hydraulic fluids are generally classiï¬ed as oil assures satisfactory life and operation of system compo- vegetable oil based (HETG), synthetic ester (HEES), polyal- nents, especially hydraulic pumps and motors. Generally, oil kylene glycol (HEPG) and polyalphaoleï¬n (HEPR). In addition, selected for use with pumps and motors is acceptable for use special water-glycol hydraulic fluids are used in applications with valves. Critical servo valves may need special consid- in which water miscibility is necessary, along with biodegrad- eration. When selecting oil for use in an industrial hydraulic able properties. system, be sure the oil: Fire-Resistant Hydraulic Fluids • Contains the necessary additives to ensure excellent anti- Fire-resistant fluids are classiï¬ed as water-containing fluids wear characteristics or synthetic anhydrous fluids. Water acts as a ï¬re-retarding • Has proper viscosity to maintain adequate sealing and lubri- agent in water-containing fluids. The chemical structure of cation at the expected operating temperature of the synthetic anhydrous fluids provides ï¬re resistance. hydraulic system Many applications that are prone to ï¬re hazard, such as steel • Includes rust and oxidation inhibitors for satisfactory sys- mills, foundries, die casting, mines, etc., require the use of tem operation ï¬re resistant hydraulic fluid for improved ï¬re safety. Fire- Types of Hydraulic Fluids resistant fluids may not be ï¬re proof, but they have better ï¬re resistance compared to that of mineral oil. Hydraulic fluids are classiï¬ed by the type of base stock used. Some fluids are further classiï¬ed by fluid formulation and The alternative fluids are recommended when speciï¬c proper- performance. ties, such as ï¬re resistance, biodegradability, etc., are neces- sary for the application. Keep in mind that alternative fluids Anti-Wear Hydraulic Fluids may differ from AQ petroleum fluids in properties such as For general hydraulic service, Eaton recommends the use of pressure viscosity coefï¬cient, speciï¬c gravity, lubricity, etc. the new generation of anti-wear (AW) hydraulic oils containing Hence, certain pumps/motors may need to be de-rated, some adequate quantities of anti-wear additive. can be operated under full ratings, and others are not rated. Be sure to conï¬rm product ratings with the speciï¬c fluid in Eaton requests that fluid suppliers test newly developed the intended application. lubricants on an Eaton 35VQ25A high pressure vane pump, according to the Eaton ATS-373 test procedure, ASTM Speci- Viscosity ï¬cation D-6973. Lubricants that pass the test are considered Viscosity is the measure of a fluid’s resistance to flow. Selec- good quality, anti-wear hydraulic fluids that can be used with tion of hydraulic oil with a speciï¬c viscosity range should Eaton vane pumps at high operating conditions. They offer su- be based on the needs of the system, limitations of critical perior protection against pump wear and long service life. In components, or proper performance of speciï¬c types of units. additional, they provide good demulsibility, as well as protec- At system startup and during operation, Eaton recommends tion against rust. maintaining the oil’s maximum and minimum viscosity ranges Crankcase Oils (see chart). Very high viscosities at startup temperatures can cause noise and cavitational damage to pumps. Continuous Automotive-type crankcase oils with American Petroleum operation at moderately high viscosities will tend to hold air Institute (API) letter designation SE, SF, SG, SH or higher per in suspension in the oil, as well as generate higher operating SAE J183 classes of oils are recommended for hydraulic ser- temperatures. This can cause noise, early failure of pumps vice. The “detergent” additive tends to hold water in a tight and motors, and erosion of valves. Low viscosities result emulsion and prevents separation of water. in decreased system efï¬ciency and impairment of dynamic Automotive type crankcase oils generally exhibit less shear lubrication, causing wear. stability, which can result in higher loss of viscosity during It is important to choose the proper oil viscosity for your service life. Multiple-viscosity, industrial-grade hydraulic fluids particular system in order to achieve the startup viscosity and with better shear stability will provide improved viscosity running viscosity range (see chart) over the entire tempera- control. ture range encountered. Conï¬rm with your oil supplier that Other mineral oil-based lubricants commonly used in hydraulic the oil viscosity will not be less than the minimum recom- systems are automatic transmission fluids (ATFs) and univer- mended at the maximum oil temperature of your application. sal tractor transmission oils (UTTOs). A number of anti-wear hydraulic oils containing polymeric Synthetic Hydrocarbon thickeners (Viscosity Index Improvers {VII}) are available for Synthetic hydrocarbon base stocks, such as polyalphaoleï¬ns use in low temperature applications. Temporary or permanent (PAOs), are used to formulate ATFs and UTTos. viscosity loss of some of these oils at operating temperature 22 EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013
Z-Transmission Hydraulic Fluid Recommendations may adversely affect the life and performance of compo- Filters nents. Before using polymer containing oils, check the extent Proper ï¬lter type and size, which vary depending on the type of viscosity loss (shear stability) to avoid hydraulic service of fluid used in a system, are essential for healthy system below the recommended minimum viscosity. Oil with good function. The primary types of ï¬lter materials are paper, cel- shear stability is recommended for low temperature applica- lulose, synthetic ï¬ber, and metal. tions. Filter media, adhesive, and seals must be compatible with the Multi-grade engine oils, ATFs, UTTOs, etc., also contain VIIs, fluid used in the system. To lengthen fluid change out inter- and viscosity loss will be encountered during use. vals, special absorbent ï¬lter media may be used to remove Cleanliness moisture and acids from phosphate esters. Fluid cleanliness is extremely important in hydraulic system. Seals/Elastomers More than 70% of all failures are caused by contamination, Select seal/elastomer materials that are suitable for the ap- which can reduce hydraulic system efï¬ciency up to 20% plication, minimum and maximum operating temperature, before system malfunction may be recognized. Different and compatibility with the type of fluid used in the hydraulic hydraulic components require different cleanliness levels. The system. The effect of hydraulic fluid on a particular elastomer cleanliness of a hydraulic system is dictated by the cleanli- depends on the constituents of the fluid, temperature range, ness requirement of the most stringent component in the and level of contaminants. system. OEMs and distributors should provide their custom- Replacing Hydraulic Fluid ers with cleanliness requirements for Eaton hydraulic compo- nents used in their system designs. Refer to Eaton product Although sometimes valid, arbitrary hydraulic fluid change- catalogs for speciï¬c cleanliness requirements of individual outs can result in wasted good oil and unnecessary machine components. downtime. Fluid Maintenance A regularly scheduled oil analysis program is recommended to determine when oil should be replaced. The program should The condition of a fluid has a direct bearing on the perfor- include inspection of the oil’s color, odor, water content, solid mance and reliability of the system. Maintaining proper fluid contaminants, wear metals, additive elements, and oxidation viscosity, cleanliness level, water content, and additive level products. Clean the system thoroughly and flush with fresh, is essential for excellent hydraulic system performance. In new fluid to avoid any contamination with the previous fluid/ order to maintain a healthy fluid, Eaton recommends perform- lubricant. Replace all seals and ï¬lters with new, compatible ing periodic check on the condition of the oil. parts. Mixing two different fluids in the same system is not System Design Considerations recommended. When designing a hydraulic system, the speciï¬c gravity of Feel free to contact your Eaton representative with questions the hydraulic fluid needs to be taken into consideration. If the concerning hydraulic fluid recommendations. speciï¬c gravity of the fluid is higher than that of mineral oil, be sure the reservoir oil level is adequately above the pump inlet to ensure a minimum of 1.0 bar absolute pressure at the pump inlet. EATON Z-Transmission Catalog E-TRCD-CC001-E March 2013 23
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Eaton Eaton Eaton Hydraulics Group USA Hydraulics Group Europe Hydraulics Group Asia Paciï¬c 14615 Lone Oak Road Route de la Longeraie 7 Eaton Building Eden Prairie, MN 55344 1110 Morges No.7 Lane 280 Linhong Road USA Switzerland Changning District, Shanghai Tel: 952-937-9800 Tel: +41 (0) 21 811 4600 200335 China Fax: 952-294-7722 Fax: +41 (0) 21 811 4601 Tel: (+86 21) 5200 0099 www.eaton.com/hydraulics Fax: (+86 21) 2230 7240 © 2013 Eaton All Rights Reserved Printed in USA Document No. E-TRCD-CC001-E March 2013
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