Disassembly
NOTE: Governor gear is held onto shaft by small
molded tabs in gear. When gear is removed from
shaft, these tabs are destroyed and gear must
be replaced. Therefore, remove gear only if
absolutely necessary.
Governor gear must be replaced once it is removed from
oil pan.
1. Remove regulating pin and governor gear assembly.
2. Remove locking tab thrust washer located under
governor gear assembly.
3. Carefully inspect governor gear shaft and replace it
only if it is damaged. After removing damaged shaft,
press or lightly tap replacement shaft into oil pan to
depth shown.
Reassembly
1. Install locking tab thrust washer on governor gear
shaft with tab down.
2. Position regulating pin within governor gear/fl yweight
assembly and slide both onto governor shaft.
Oil Pump Assembly (Style A)
Oil Pump (Style A) Torque Sequence
1
2
Oil pump is mounted inside oil pan. If service is required,
continue with Disassembly, Inspection, and Reassembly.
Disassembly
1. Remove screws.
2. Remove oil pump assembly from oil pan.
3. Remove oil pump rotor. Unhook locking clip, and
care fully pull it free from oil pump housing.
Relief valve is a one-piece style, staked to oil pump
housing. Removal should not be attempted, nor is
internal servicing possible. If a problem with relief
valve is encountered, oil pump should be replaced.
Inspection
Inspect oil pump housing, gear, and rotors for nicks,
burrs, wear, or any visible damage. If any parts are worn
or damaged, replace oil pump.
Reassembly
1. Install oil pickup to oil pump body. Lubricate O-ring
with oil and make sure it remains in groove as
pickup is being installed.
2. Install rotor.
3. Install oil pump body to oil pan and secure with
screws. Torque screws as follows:
a. Install fastener into location 1 and lightly tighten
to position pump.
b. Install fastener into location 2 and fully torque to
recommended value.
c. Torque fastener in location 1 to recommended
value.
First Time Installation:
10.7 N·m (95 in. lb.)
All Reinstallations:
6.7 N·m (60 in. lb.)
4. After torquing, rotate gear and check for freedom of
movement. Make sure there is no binding. If binding
occurs, loosen screws, reposition pump, retorque
screws and recheck movement.
Oil Pump Assembly (Style B)
Oil pump is mounted inside oil pan. If service is required,
continue with Disassembly, Inspection, and Reassembly.
Disassembly
1. Remove screws.
2. Lift oil pump assembly from oil pan. Remove outer
gerotor gear from oil pan.
3. Ensure ball and spring remain installed in pressure
relief hole of oil pan. If ball and spring fall out of
pressure relief hole, see reassembly for correct
installation.
4. Remove oil pump cover O-ring from groove in oil
pan.
Inspection
Inspect oil pump housing, gear, and rotors for nicks,
burrs, wear, or any visible damage. Inspect oil pump
cover O-ring for cuts, nicks, or any visible damage. If any
parts are worn or damaged, replace oil pump assembly
and/or O-ring. Check oil pickup screen for damage or
restriction, replace if necessary.
Reassembly
1. Lubricate outer gerotor gear with oil. Install outer
gerotor gear through shaft of oil pump, around inner
gerotor gear. Matching molding dots on inner and
outer gerotor gears is not necessary and will not
aff ect oil pump effi ciency.
2. Reinstall ball, then spring into pressure relief hole in
oil pan.
3. Reinstall O-ring into groove in oil pan; make sure it is
fully seated in groove.
4. Install oil pump inserting center shaft into
corresponding recess in oil pan. Apply consistent
downward pressure to oil pump cover, compressing
oil pressure relief spring and start screws. Secure oil
pump by torquing screws (in no specifi c sequence)
to 9.0 N·m (80 in. lb.).
5. After torquing, rotate gear and check for freedom of
movement. Make sure there is no binding. If binding
occurs, loosen screws, reposition pump, retorque
screws and recheck movement.
Disassembly/Inspection and Service
73
24 690 31 Rev. D
KohlerEngines.com
