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John Deere 165, 175, 185 - Eaton Hydrostatic Transmission
The hydrostatic drive John Deere 165, 175, 185 tractor is equipped with
an infinite speed transmission. The transmission is mounted on the
differential case which contains a two-pinion bevel gear differential. A
single control lever controls both speed and direction as well as
braking. A neutral-start switch (activated when brake pedal is
depressed) prevents the engine from starting when control lever is in
forward or reverse position. A dump valve is incorporated to allow the
operator to push the tractor manually. The cooling fan cools the
hydrostatic fluid in the transmission. Power from the engine is
transmitted through a drive belt to the transmission. Power is
transmitted from the transmission to the brake shaft, output shaft, and
differential and axle. Power to the differential, transmitted through
the pinion and bevel gears, turns the axle and wheels.
Remove differential and hydrostatic transmission assembly
Remove mower
from John Deere 165, 175, 185 tractor. Put transmission control lever in
neutral. Drain differential. Remove rear wheels. Remove fuel tank.
Remove heat shield. Remove two nuts. Remove transmission linkage and key
from transmission. Loosen three cap screws fastening differential to
frame. Disconnect brake linkage. Remove four nuts fastening differential
to frame. Remove three cap screws and lower differential and
transmission assembly. Remove traction drive belt from transmission
sheave. Remove differential and transmission assembly.
John Deere 165, 175, 185 tractor -
Remove Eaton transmission
Remove four cap screws and washers. Remove
transmission and gasket from differential. Replace shaft seal - Clean
exterior of transmission to prevent contamination. Drain transmission
fluid. Remove seal using JDG213 Seal Remover. Lubricate inner surface of
seal. Press seal into position over shaft with JDG214 Seal Installer.
Remove and inspect fan and sheave - Remove and inspect fan. Replace if
damaged. Remove two Allen-head screws and transmission sheave. Inspect
sheave. Replace if damaged.
John Deere 165, 175, 185 tractor -
Disassemble Eaton transmission
Oil reservoir has a left-hand thread.
Drain transmission at reservoir. Remove reservoir. During assembly,
cover and body must be in their original positions or transmission
output rotation will be reversed. Make line across cover and body to
mark correct positions for assembly. Remove two Allen-head screws.
Rotate JD 165, 175, 185 tractor transmission so that cover is on top of
body. Loosen cover. If cover does not separate easily from body, tap
cover and body with plastic hammer. Lift cover off body. For proper ball
positioning when assembling, put numbers on rotor before removal. Use a
wide rubber band to hold pistons in place. Remove rotor. Remove
retaining ring from output shaft. Remove gear. Remove key and spacer.
Remove output shaft. Remove retaining ring. Remove bearing and oil seal.
Remove retaining ring from input shaft. Remove key from shaft. Remove
dump valve shaft. Remove pivot pin assembly. For proper ball positioning
when assembling, put numbers on rotor before removal. Use a wide rubber
band to hold the pistons in place. Remove rotor. Remove cam ring. Remove
button. Remove input shaft and bearing assembly. Remove oil seal.
Inspect body and output shaft assembly
Inspect body. Replace if
cracked or broken. Inspect bearing and output shaft. Replace if damaged.
Inspect cover - Inspect cover, especially around control shaft. Replace
cover if cover is broken or cracked. Inspect input shaft assembly (John
Deere 165, 175, 185 hydrostatic transmission) - Inspect retaining ring.
Replace if damaged. Do not separate bearing from shaft unless damage is
found. Inspect input shaft and bearing. If damage is found, remove snap
ring and remove bearing from shaft. Install bearing and new snap ring on
shaft. Inspect control shaft assembly - Remove and discard oil seal from
control shaft assembly. Inspect dowel pin and control shaft. Replace if
damaged.
Replace control shaft assembly
Measure distance between center of
dowel pin and end of control shaft. Use this dimension to locate dowel
pin from outside of cover. Drill 11/32-in. diameter hole in line with
center of control shaft and dowel pin. Remove dowel pin using a punch
through the drilled hole. Remove retaining ring and washer. Remove
control shaft. Install a 1/8-in. countersunk hex-head pipe plug in
drilled hole. Pipe plug must be even with outside surface of case.
Lubricate new control shaft. Install in cover. Install washer and
retaining ring. Position keyway as shown before install doweling pin.
Install new dowel pin through shaft until 28.6 mm (1.13 in.) of pin
extends above shaft. Install new oil seal.
Inspect rotor assemblies
Inspect for burrs or scoring in bore. Inspect
ball pistons and springs. Check rotor bushings for wear and scoring.
Apply a thin film of oil on ball pistons. Put corresponding ball piston
in numbered hole of rotor. Close inner port of rotor with finger. Push
on ball with thumb. Should feel spongy and not stick. Repeat step for
each ball piston. If one ball in rotor set rolls or does not FLOAT in
rotor, replace complete. If any irregularities are found, replace the
rotor assembly. Install springs and ball pistons in their original
positions. Secure with a wide rubber band. Inspect pump race - Inspect
line where ball pistons contact pump race. If irregularities found,
replace race. Install flush to 0.25 mm (0.010 in.) recessed from edge of
cam. Inspect motor race - Inspect line where ball pistons contact motor
race. Replace race if not smooth or free of irregularities.
Inspect pivot pin assembly (JD 165, 175, 185 hydrostatic transmission)
Remove and inspect dump valve bracket and spring assembly. Replace if
damaged. Inspect both pivot pin assembly journals. Replace assembly if
any irregularities are found. Inspect dampening pistons. Replace if
scored. Shake pivot pin assembly to inspect check balls. If check balls
do not rattle, check valve assembly is faulty. Replace valve assembly.
Replace Dampening pistons
Firmly tap outside edge of piston pin
assembly on work surface to dislodge pistons. If piston did not come
out, see adhesive to fasten cap screw to it. Pull piston from the bore.
Remove back-up rings and O-rings from pistons. Install new back-up rings
and O-rings on pistons. Lubricate outer surface of pistons. Push pistons
into bores with smooth face up. Replace check valve assembly - Remove
coil pin. Tap holes in check valve bodies using a 5/16-18 NC tap. Pull
check valve bodies out using a long cap screw or threaded puller. Remove
and inspect check balls and retaining rings. Replace any defective
parts. Install retaining rings and check balls. Install new check valve
bodies. Be sure to allow for coil pin clearance. Install coil pin.
Install dump valve bracket and springs.
Assemble Eaton transmission (John Deere 165, 175, 185 tractor)
Lubricate inner surface of new seal using clean lubricant. Install seal.
Install input shaft and bearing assembly. Install button. Install cam
ring. Check cam ring movement. Cam ring must move freely from stop to
stop. If binding occurs at either stop, rotate cam ring insert 180°.
Check movement again. Align internal spline of pump rotor with external
spline on input shaft. Install rotor. Remove rubber band. Do not force
rotor assembly on pivot pin assembly. Rotor assembly must turn freely.
If not, recheck installation. Install pivot pin assembly. Install dump
valve shaft. Tighten to 4 Nm (30 lb-in.). Install retaining ring to
cover. Lubricate inner surface of new seal using clean lubricant.
Install seal with rubber lip toward counterbore in body. Install output
shaft in body so that cross pin fits into groove. Support output shaft
from below so that cross pin of shaft is tight against body. Install
bearing and retaining ring. Check that output shaft rotates freely by
hand. If not, recheck installation. Install washer. Install key in
shaft. Install gear and retaining ring. Align slot in rotor assembly
with cross pin on output shaft. Install rotor assembly and remove rubber
band, if used. Install cover to body. Align body and cover marks.
Install two Allen-head screws and tighten to 20 Nm (177 lb-in.). Install
new seal ring to oil reservoir recess in cover. Install oil resrvoir and
tighten to 14 Nm (124 lb-in.).
Install fan and sheave
Install sheave to input shaft and fasten with
two Allen-head screws. Install fan on input shaft. Fill transmission
reservoir - Remove plug and reservoir cap. Fill reservoir with
recommended engine oil until fluid flows from vent. Rotate both input
and output shafts to release air trapped in transmission. Add oil to
reservoir until oil re-appears at vent, then install and tighten plug.
Refill reservoir to cold level FULL mark on units with dipstick or until
oil is 140 mm (5.50 in.) below top of reservoir. Replace reservoir cap.
Install Eaton transmission (JD 165, 175, 185)
Install gasket and transmission on differential. Install four cap screws and washers. Fill differential assembly with 0.7 L (1.5 pt) of SAE 90 oil. Install differential and hydrostatic transmission assembly - Position differential and hydrostatic transmission assembly under frame. Install traction drive belt on transmission sheave. Lift right side of rear axle and install strap, nuts, and washers. Lift left side of rear axle and install strap, nuts, and washers. Install three washers and cap screws. Tighten all differential and hydrostatic transmission mounting hardware. Connect brake linkage. Install key and transmission linkage. Tighten nuts. Install heat shield. Install fuel tank. Install rear wheels. Remove blocking from tractor. Check oil level in differential. Oil should be a short distance below plug hole. Adjust transmission. Install mower.
- JD 130, 160, 165, 175, 180, 185 Engine and PTO Clutch
- JD 130, 160, 165, 175, 180, 185 Transaxle service
- JD 165, 175, 185 Eaton Hydrostatic Transmission
- JD 165, 175, 185 Hydrostatic Differential
- JD 130, 160, 165, 175, 180, 185 Steering, Front Axle and Brakes
- JD 130, 160, 165, 175, 180, 185 Servicing Mower
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