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John Deere 165, 175, 185 - Hydrostatic Differential

John Deere 165, 175, 185 Tractor - Peerless Hydrostatic Differential

Remove Peerless hydrostatic differential

Remove hydrostatic differential and transmission assembly from JD 165, 175, 185 tractor. Remove transmission from differential. Disassemble Peerless differential - Remove brake assembly. Remove cap screws and cover. Remove case gasket. Remove brake shaft and thrust washer. Remove thrust washer and gear from brake shaft. Inspect surfaces of thrust washers and brake shaft for wear. Inspect gear teeth and splines for wear or damage. Replace parts if necessary. Remove output shaft. Remove thrust washer and spacer. Remove output gear using a plastic hammer. Inspect surfaces of thrust washer and output shaft for wear. Inspect gear teeth and splines for wear or damage. Replace parts if necessary. Remove differential and axle assembly.

John Deere 165, 175, 185 Tractor - Disassemble differential and axle

Remove cap screws and separate axles from ring gear. Remove pinion blocks, pinion gears, and shaft from ring gear. Remove snap ring. Remove bevel gear, thrust washer, differential carrier, and two thrust washers from each axle. Inspect thrust washers, differential carrier, and axle for wear. Inspect bevel gear for wear or damage. Replace parts if necessary. Inspect differential case - Inspect case and cover for cracks, stripped threads and marred sealing surfaces. Replace if necessary. Inspect needle bearings and seals for wear. If seals or bearings are removed, press them out from inside of case and replace with new parts. Inspect bushings for wear. Replace parts if necessary. Inspect differential carrier-to-case thrust surface for wear. If case thrust surface is worn more than 1.02 mm (0.040 in.), replace case.

John Deere 165, 175, 185 Tractor - Assemble Peerless differential and axle

Lubricate all parts with SAE 90 oil during assembly. Install washers, carrier, washer and gear on both axles. Install snap ring. Install pinion gears and pinion blocks on shaft. Install pinion assembly into ring gear. Install assembled ring gear between axles. Install and tighten cap screws to 9.5 Nm (84 lb-in.). Assemble differential - When installing differential and axle assembly, be careful not to damage seal in axle housing. Install differential and axle assembly. Install gear on shaft with chamfered side of internal spline towards the shaft. Install output gear on ground shaft using a plastic hammer. Install spacer and thrust washer on output shaft. Install output shaft assembly. Assemble brake shaft. Install brake shaft assembly by putting rear thrust washer into position first. New differential cases have untapped bolt holes. Use the self-tapping cap screws when assembling. Install new gasket and cover. Tighten cap screws to 11 Nm (97 lb-in.). Install brake assembly. Install Peerless hydrostatic differential - Install transmission on hydrostatic differential. Remove fill plug. Add 0.7 L (1.5 pt) of SAE 90 oil to differential. Check for leaks. Install differential and transmission assembly on tractor.

Kanzaki hydrostatic differential (JD 185 tractor)

Separate differential and transmission

Clean transaxle assembly and drain oil. Remove items. Disassemble Kanzaki transmission - Remove cover and idler gear assembly. Measure idler gear and idler shaft. Idler Gear I.D - 21.01-21.03 mm (0.827-0.828 in.). Idler Shaft O.D 16.99-17.00 mm (0.668-0.669 in.). Remove motor gear assembly and brake assembly. Measure brake components. Cam Lever Shaft O.D - 19.97-20.03 mm (0.786-0.788 in.). Cam Lever Shaft: Bore I.D. (Cover) - 20.10-20.20 mm (0.791-0.795 in.), Bore I.D. (Housing) - 20.05-20.08 mm (0.789-0.790 in.). Actuator (includes ball) - 9.10-9.30 mm (0.358-0.366 in.). Disc - 1.90-2.10 mm (0.075-0.083 in.). Plate - 2.40-2.60 mm (0.094-0.102 in.). Remove left and right axle assemblies. Measure axle housings. Axle Housing O.D. (Needle Bearing) - 24.98-25.00 mm (0.983-0.984 in.). Remove pinion drive assembly. Measure counter gear and pinion drive. Counter Gear I.D - 20.01-20.03 mm (0.788-0.789 in.). Pinion Drive O.D - 20.00-20.02 mm (0.78-0.79 in.). Remove differential assembly. Measure pinion shaft, pinion gear and differential case. Pinion Shaft O.D - 13.97-13.98 mm (0.549-0.550 in.). Pinion Gear I.D - 14.03-14.05 mm (0.552-0.553 in.). Differential Case I.D. (Axle) - 20.08-20.10 mm (0.79-0.791 in.).

John Deere 185 Tractor - Assemble differential

Clean screw threads using clean and cure primer. Apply thread lock and sealer (medium strength) on cap screw threads. Assemble differential assembly. Tighten cap screws to 26 Nm (230 lb-in.). Ring gear to pinion drive gear backlash must be checked after pinion drive assembly and axles are installed. Assemble pinion drive assembly (except items C, K and L). New differential cases have untapped bolt holes. Use the higher torque when installing tapping bolts. Tighten tapping bolts to: New Case - 29 Nm (260 lb-in.), Used Case - 25 Nm (221 lb-in.). Assemble and install left and right axle assemblies. Tighten tapping bolts. When checking backlash, hold axles and differential assembly solid. Measure ring gear to pinion drive gear backlash at key groove. Backlash specification is 0.15—0.30 mm (0.006—0.012 in.). Adjust backlash by adding or subtracting left axle shaft shims. Install brake assembly and motor gear assembly. Tighten tapping bolts. Assemble idler gear assembly. Oil grooves in idler gear go toward cover. Apply flexible sealant or an equivalent on gasket surface of the differential cover and case. Install cover and tapping bolts. Assemble Kanzaki differential and transmission - Install items. Tighten drain plug to 15 Nm (130 lb-in.). After installing the complete transaxle into the machine, bleed the hydrostatic system.

Sundstrand hydrostatic transmission (John Deere 185 tractor)

Separate Sundstrand differential and transmission

Clean transaxle assembly and drain oil. Remove items. Disassemble transmission - Remove center section from transmission housing assembly. Remove gasket. Remove items from center section. Do not nick or scratch lapped surface of cylinder blocks. Piston-to-bore relationship need not be maintained; keep pump and motor components separate, they are not interchangeable. Remove motor cylinder block and shaft assembly from the housing assembly. Remove pump cylinder block and shaft assembly. Remove items from housing assembly. Assemble Sundstrand transmission (JD 185 tractor) - Install items into housing assembly. Install pump cylinder block and shaft assembly into the housing assembly. Install motor cylinder block and shaft assembly. Install items into center section. Install new gasket. Install center section onto transmission housing assembly. Tighten cap screws to 17 Nm (150 lb-in.).

John Deere 185 Tractor - Assemble differential and transmission

Install items. Tighten drain plug to 15 Nm (130 lb-in.). After installing the complete transaxle into the machine, bleed the hydrostatic system. Bleed hydrostatic system - After installing a repaired or replacement part, follow this run-in procedure to assure that air is purged from the system. Fill case and reservoir to FULL line. Transmission oil capacity is approximately 850 cc (28.7 fl oz). Lift rear wheels off ground using hoist. Put jackstands under frame. Start engine and idle it for two or three minutes. Apply full forward for 10 seconds. Bring to NEUTRAL for five seconds. Push tow (bleed) valve for two seconds. Apply full forward for 15 seconds. Stop engine. Fill reservoir to FULL line. Start engine and idle it. Put Sundstrand transmission in NEUTRAL for 10 seconds. Apply full forward for 10 seconds and return to NEUTRAL. Stop engine. Fill reservoir to FULL line.