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ETRLD
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Catalog excerpts

ETRLD - 1

s ® Eaton Hydrostatic Transaxles c h y i d r l u u ydraulics l a i a c d r s Models 751, 851, 771, and 781 Hydrostatic Transaxles y We Solutions S H Manufacture o l u t i o n s

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ETRLD - 2

Hydrostatic Transaxles Hydrostatic Transaxles Eaton Models 751, 771, 781, and 851 use the time proven ball piston design for both pumps and motors. The Models 751 and 851 use one ball piston pump and two ball piston motors to provide the speed and torque required to propel vehicles of many different sizes. Transaxles for the ZTR (Zero Turn Radius) type vehicles The 771 is an assembly with one pump and one motor. Two assemblies, a right and left, are required on each vehicle. The 781 consists of two units similar to the 771 joined together to make one assembly. Eaton Transaxles Eaton...

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ETRLD - 3

Hydrostatic Transaxles These Transaxles Provide: • Smooth Performance — Infinitely Adjustable control, deliver- ing smooth operation in both forward and reverse. • Easy Operation — One control provides both forward and reverse, plus speed. No clutch, no synchronizer, no shifting. • Hydrostatic Dynamic Braking — In all kinds of weather, all kinds of terrain, Eaton hydros provide dynamic braking in either • Quiet Operation — Equipped with special pistons to reduce noise and vibration no matter how tough the job. • Trouble Free Performance — A proven, tested design ensures years of reliable...

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ETRLD - 4

Hydrostatic Transaxles This compact package includes one ball piston pump and two ball piston motors, each with a set of double planetary gears in a single assembly. One piece construction forms a strong frame member for the vehicle. It has a single input control. Base Unit Description: Product Number 751-044 Includes 16:1 final drive ratio, CW input shaft rotation, vertical input orientation, environmentally protected wet type parking/emergency brake, plugged side port, 5/8 in. straight barb fitting in main cover, internal filter, externally threaded control shaft, 1 in. dia. output shafts...

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ETRLD - 5

Hydrostatic Transaxles Model 751 Dimension Data 214,00±0,56 [8.425±.022] 81,8 [3.22] Max. Expansion Tank Connection for 15,88 [.625] Nominal I.D. Hose 31,75 [1.250] 25,4 [1.00] 514,78±1,75 [20.267±.069] Standard Fitting (4 Options) 17 mm Dia. Input Shaft— CW or CCW Rotation (CW Standard) 165,10±1,09 [6.500±.043] Control Shaft A 330,22±1,75 [13.001±.069] 749,3 [29.50] Parking Brake Linkage Mounting Points (2) B Linkage Mounting Points (2) Dump Valve Axle Mounting Points (2) ( Both Sides ) 102mm [4 inch] Min. Dia. Pulley with 178mm [7 inch] or 203mm [8 inch] Fan 99,4 [3.92] 116,36±1,64...

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ETRLD - 6

Hydrostatic Transaxles This compact package includes one ball piston pump with a higher displacement than the 751, 771, 781 and two ball piston motors, each with a set of double planetary gears In a single assembly. A charge pump Is standard on the 851. One piece construction forms a strong frame member for the vehicle. It has a single Input control. Base Unit Description: Product Number 851-098 Includes 23:1 final drive ratio, CW input shaft rotation, vertical input orientation, environmentally protected wet type parking/emergency brake, 7/8-14 SAE o-ring ports (side and main cover),...

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ETRLD - 7

Hydrostatic Transaxles Model 851 Dimension Data Axle Mounting ( Both Sides ) Wheel/Hub Spacer Customer Supplied Axle Shaft

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ETRLD - 8

Hydrostatic Transaxles path vehicles. The Eaton ball piston pump an assembly with one pump each vehicle. Base Unit Includes 23:1 final drive ratio, CW input shaft rotation, vertical input orientation, environmentally protected wet type parking/ emergency brake, plugged side port, 5/8 in. straight barb fitting in main cover, internal filter, externally threaded control shaft, 1 in. dia. output shaft with 1/4 in. square keyway and dump valve. See model specifications Combined Operating Specifications Combined Performance of Both Units 3600 RPM Input 82 C [180 F] Operating Temp. (Max....

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ETRLD - 9

Hydrostatic Transaxles Model 771 Dimension Data 129,5 [5.10] Max. Recommended Centerline of Drive Pulley 257,39±1,08 [10.134±.043] 374,7 [14.75] 68,6 [2.70] Max. 116,71±1,18 [4.595±.046] 81,8 [3.22] Max. A-Side 116,36±1,64 [4.581±.065] 214,00±0,56 [8.425±.022] Mounting Holes (2) 99,4 [3.92] Expansion Tank Connection for 15,88 [.625] Nominal I.D. Hose 17 mm Dia. Input Shaft— CW or CCW Rotation (CW Standard) 461,1 [18.154] Axle Mounting Points (2) ( Both Sides ) A Parking Brake 165,10±1,09 [6.500±.043] 86,45±0,28 [3.404±.011] Linkage Mounting Points (2) Linkage Mounting Points (2) Mounting...

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ETRLD - 10

Hydrostatic Transaxles These transaxles are designed for use on twin path vehicles. The Eaton ball piston pumps and motors are the same as those used on the 751, 771 transaxles. The 781 is an assembly of two transaxle halves. Brake control lever A-slde standard, one lever actuates both sides. from Eaton Base Unit Description: Product Number 781-017 Includes 23:1 final drive ratio, CW input shaft rotation, vertical input orientation, environmentally protected wet type parking/emergency brake operated by a single lever located on the "A" side, plugged side port, 5/8 in. straight barb fitting...

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ETRLD - 11

Hydrostatic Transaxles Model 781 Dimension Data 214,00±0,56 [8.425±.022] 81,8 [3.22] Max. 31,75 [1.250] 25,4 [1.00] Expansion Tank Connection (2) for 15,88 [.625] Nominal I.D. Hose Standard Fitting (4 Options) 102mm [4 inch] Min. Dia. Pulley (2) 178mm [7 inch] Fan (2) A Parking Brake 703,55±2,97 [27.699±.117] Linkage Mounting Points (4) 518,97±2,54 [20.432±.100] 188,75±0,79 [7.431±.031] 938,0 [36.93] Linkage Mounting Points (2) ( A and B ) B 165,1±1,09 [6.500±.043] 99,4 [3.92] 116,36±1,64 [4.581±.065] Mounting Surface 257,39±1,08 [10.134±.043] 374,7 [14.75] 68,6 [2.70] Max. Control Dump...

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ETRLD - 12

Hydrostatic Transaxles Miscellaneous Dimensions — Transaxles 40,28±0,80 [1.586±.032] Reference 7/8-14 SAE O-ring Port — Accepts SAE J514,-10 Fitting ( Installation Torque for Steel Fitting 60±6 Nm [44±4.4 lb-ft] ) 88,9 [3.50] 76,2 [3.00] Control Shaft ( Check Specifications for Each Transaxle Series ) 60,96,±0,25 [2.400±.010] (Both Sides) 46,63±0,25 (2) [1.836±.010] 9,83±2,21 [.387±.087] Note: Linkage on Brake Lever Must be Center Pull 60,32±0,78 [2.375±.031] 38,1 (2) [1.50] Linkage Mounting Points (2) 5/16-18 UNC-2B Thread 12,7 [.50] Min. Full Thread Torque to 14,1±1,4 Nm [125 ±12.5 lb-in]...

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