EATON 750, 780 HYDROSTATIC TRANSAXLE Table of Contents – Page 1 of 1 TRANSAXLE SERIES 750 TRANSAXLE PARTS DRAWING TRANSAXLE PARTS LIST TOOL REQUIREMENTS PRODUCT IDENTIFICATION AND ORDERING INFORMATION COMPLETE DISASSEMBLY AXLE DISASSEMBLY PROCEDURES HOUSING DISASSEMBLY PROCEDURES ROTOR ASSEMBLIES-DISASSEMBLY AND INSPECTION REASSEMBLY HOUSING REASSEMBLY COVER REASSEMBLY AXLE REASSEMBLY FLUID RECOMMENDATIONS TRANSAXLE SERIES 780 FINAL DRIVE REDUCTION OPTIONS - PARTS LIST TRANSAXLE PARTS DRAWING TRANSAXLE PART
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750 Transaxle Parts List Ref. No. Description Qty 1 Cover. Subassembly (S/A) ...................... 1 1 Shaft. 2 Input. S/A ............................ 1 Bearing. 3 Input Shaft ....................... 4 Ring. Retaining. External . . . . . . . . . . . . . . . . . . . 1 1 5 Ring. Retaining. Internal ...................... 1 6 Seal. Input Shaft ............................ 1 7 Seal. Control Shaft .......................... 1 8 Housing. S/A ................................. Piston. 9 Dampening. S/A ..........
Transaxle Series 750 The following tools are required for disassembly and 3 or 4 Large Wide Rubber Bands reassembly of the transaxle. Light Petroleum Jelly (such as Vaseline) 3/8inch Socket or End Wrench Product Identification and Ordering Information 1 inch Socket or End Wrench When orderingparts for the transaxle, please include the following: Torque Wrench (300Ib-in) Date Code No. 5 or 7 Internal Retaining Ring Pliers Input Rotation No.
Reservoir Hex Screw Flange Adapter Valve Cover 1 Drain the transaxle and then secure it with the valve cover in the up position. Removehex the flange screws from the valve cover. 2 Remove the valve cover from the housing assembly. 3 Remove the valve cover gasket. Note: The gasket may have remained on the valve cover when the cover was removed from the housing assembly. Transaxle with 5 4 It is easierto disassemble the axle assemblies with the transaxle as shown.
Thrust Washer Retaining Ring 6 \ Spacer (Thick)
Axle Disassembly Procedures 13 The following procedures apply to both axle 5 Remove the hex flange screws from either axle assemblies. assembly. Remove the axle housing gasket from the wear 6 Carefully remove the axle assembly from the plate. housing assembly. Note: This gasket may have remained on the 7 In most cases the brake shaft will remain in the housing assembly when the axle assembly was housing assembly when the axle assembly is removed. If this occurs, remove the brake shaft at removed. this time.
the axle with a plastic tipped hammer. Thiswill 25 Reposition the axle housing with the splined 5 dislodge the seal and bearing from the axle bore. end of the axle in the up position. Use4aorno. external retaining ring pliers to remove the retaining ring and thrust washer from the axle shaft. 28 Press the bearing from the axle shaft. Remove the seal and thrust washer from the axle shaft.
Self Tap Screw PB or DL/PB Cover Brake Housing Disassembly Procedures 29 Remove the four self tap screws from the brake cover. 30 Removethebrakecoverfromthehousing g assembly. 31 Remove the PB or DL/PB assembly from the housing assembly. 32 In most cases further disassemblyof the PB or DL/PB is not necessary.
RetainingRing Input Shaft Control Shaft Seal S/A \ Hex Sea I Insert \ Shaft Control Dump Valve Nut O-ring \ ‘I Cam Ring S/A O-ring Pump Rotor Assembly 10
33 Reposition the housing assembly and remove the cap screws from the cover assembly. Note: One of the hex flange screws is located in the case drainport. such as an eggcarton or ice cube tray. The balls must be replaced in the same bores from which the were removed because they are all select fit. Check for broken or collapsed springs in the motor rotor assembly.
RetainingRing InputShaft Control Shaft Seal S/A Hex Flange Cover Insert Shaft Control \ Dump Valve Nut O-ring \ ‘I CamRing S/A 12
Reassembly 67 Install the control shaft assembly, first aligning 57 Before reassembling the Transaxle Series 750, clean allparts and assemblies with clean solvent the cam ring insert with the cam ring assembly and and blow them dry with compressed air. Inspect and then with the housing assembly. replace all scratched or damaged parts. Replace all 68 Remove the rubber band from the pump rotor gaskets, shaft seals and O-rings. Lubricate all shaft assembly.
Brake Shaft Seal 81 The next step is to engage the brake shaft with the parking brake. To align and engage the splines, hold the parking brake disk with one hand and then rotate the brake shaft slightly with the other hand. 82Repositionthehousingassemblyandcarefully install the motor rotor assembly on the motor journal, into the housing assembly. Note: If a rubber band was used to retain the ball pistons, remove itnow. 83 The first sun gear is longer than the second sun gear.
For retention during assembly, apply a small amount seal from the retaining ring groove keyway, and of petroleum jelly to the thin spacer. Install the lubricate and install the seal with the lip pointing spacer on the brake shaft and brake gear. inward toward the axle housing. 95 Install the third and final gasket on thegear ring 99 Use a piece of hydraulic tubing(1½ in. O.D. x 6 assembly. in. long) to press the seal into the counterbore.
115 Installthe brake gear on the brake shaft. 104 Reposition the housing assembly. Apply a small amount of petroleum jelly to the brakeshaft 116 Apply a small amount of petroleum jelly to the seal. Carefully install the remaining brake shaft. spacer for retention. Install the thick spacer on the brake shaft. 105 To align and engage the brake shaft splines, hold the parking brake disk with one hand and rotate Differential Iock/parkingbrake option only, apply a the brake shaft slightly with the other hand.
n Self Tap Screw 17 Spacer (Thick)
123 Reposition the transaxle assembly and install the valve cover gasket. 124 Installthevalvecover. 125 Install the hex flange screws in the valve cover and torque them to125 Ib-in. Reservoir ScrewHex Flange Adapter Valve Cover 18 Build Date Code EffectiveJanuary 1, 1990 Original Build (example 01 0190) Date of Build Factory Rebuild (example 0101901) 01 01 times rebuilt Month Housing Customer Part No.
Fluid Recommendations A reputable supplier can help you make the best selection of hydraulic fluid for use in Eaton hydrostatic products. For satisfactory operation, the following recommendations apply: 1. The filter systemused in the hydraulic circuit should be capable of cleaning and maintaining the hydraulic fluid to meet IS0 Cleanliness Code 18/13 per SAE J1165. This code allows a maximum of 2500 particles per milliliter greater than 5µm and a maximumof 80 particles per milliliter greater than 15µm. 2.
Eaton Corporation Hydraulics Division 15151 Highway 5, Eden Prairie, MN 55344 Telephone (612) 937-9800 100410D-5620 Velbert 1 West Germany 49-2051-2070 Eaton G.m.b.H. Hydraulics Division Printed In U.S.A. FORM NO.
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PARTSDRAWING(FOLDOUT)PARTSLIST Options 13:1 Final Drive Reduction Ref. No. Part No. Description Qty. Motor,Rotor-Ball,A & BS/A,15T . . 2 Ring Gear,A & B S/A, 54T . . . . . . . . 2 2 Planetary Gear, First, A & BS/A . . . Sun Gear, First, 24T . . . . . . . . . . . . 2 2 PrimaryCarrier,A & BS/A,18T . . PlntGear,A & BS/A,First,15T . . 6 & S/A 2 PlanetaryGear,Second,AB SunGear,Second, 18T . . . . . . . . . 2 SecondaryCarrier,A & BS/A . . . 2 Plnt Gear, A& B S/A, Second, 18T.. . .... . . ... . .... . . . . .
Ref. No. 1 2 3 4 5 6 7 8 8a 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Part No. Description Qty. 780 Ref. No. Part No. Description Qty. 780 ................... 2 Cover.Subassembly (S/A) . . . . . . . . 2 I06071 31 105327 Gasket. Cover 106073 4 ............... 2 101597 32 Button . . . . . . . . . . . . . . . . . . . . . . . . . Shaft. Input. S/A 33 103757-088 Screw. ¼-20 Hex Flange 10 . . . . . . . . . . Bearing. Input Shaft . . . . . . . . . . 2 NSS 34 104416 Gasket.
HOW TO ORDER REPLACEMENT PARTS EACH ORDER MUST INCLUDE THE FOLLOWING INFORMATION 1. ProductNumber 4. Part Number 2 . Date Code 5. Quantity of Parts 3. Part Name Eaton Corporation Hydraulics Division 15151 Highway 5, Eden Prairie, MN 55344 Telephone (612) 937-9800 Eaton G.m.b.H. Hydraulics Division 100 410 D-5620 Velbert 1 West Germany 49-2051-2070 Printed in U.S.A. FORM NO.
