Disassembly/Inspection and Service
100
62 690 05 Rev. E
KohlerEngines.com
Remove Breather Assembly
1. Carefully remove harness clip from #1 valley baffl e
(if not already removed).
2. Remove fasteners securing breather assembly and
gasket to crankcase.
3. Carefully break gasket seal and remove breather
and fi lter. Do not pry on sealing surfaces as it could
cause damage resulting in leaks. Note assembly and
orientation of parts.
Remove Oil Pan Assembly
1. Remove screws securing oil pan to crankcase.
2. Locate protruding tabs on oil pan. Carefully tap to
break gasket seal. Do not pry on sealing surfaces as
this could cause leaks. Separate oil pan from
crankcase. Remove old gasket.
Inspection
Inspect oil seal in oil pan and remove it if it is worn or
damaged.
Inspect crankshaft bearing surface for wear or damage.
Replace bearing or oil pan assembly if required.
Oil Pump Assembly
Disassembly
1. Remove screws securing oil pump housing including
screw for pickup screen.
2
. Remove oil pump housing and pickup screen from
oil pan.
3. Remove oil pump gerotor gears from oil pan recess.
4. Remove oil pickup by pulling it free from oil pump
body.
5. 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, gerotor gears, and oil pan
recess for nicks, burrs, wear, or any visible damage.
Inspect inlet seal for pickup tube in housing. If any parts
are worn or damaged, replace seal, oil pump or oil pan
as required.
Reassembly
Torque Sequence
1,4
1,4
33
22
1. Make sure recess in oil pan for oil pump gerotor
gears is clean.
2. Lubricate oil pump gerotor gears with grease
(Lubriplate
®
100 or equivalent), and install into
recess.
3. Lightly lubricate with oil and install inlet seal into oil
pump housing until it is fully seated.
4. Install O-ring in groove of oil pump housing. Use a
small quantity of grease to hold it in place.
5. Lightly lubricate I.D. of inlet seal with oil and carefully
insert end of pickup tube through seal into oil pump
housing.
6. Install oil pump housing with pickup tube, over oil
pump boss and gears. Align all 3 screw locations.
7. Check alignment of parts and torque oil pump
housing screws 9.9 N·m (88 in. lb.) using sequence
below:
a. Install fastener into screw location 1 and lightly
tighten to position pump.
b. Install fastener into screw location 2 and fully
torque to recommended value.
c. Install fastener into screw location 3 and fully
torque to recommended value.
d. Finish torquing fastener in screw location 1 to
recommended value.
8. Install and torque pickup screen mounting screw to
11.3 N·m (100 in. lb.) into new hole or 7.7 N·m (68
in. lb.) into used hole.
