Disassembly/Inspection and Service
99
62 690 05 Rev. E
KohlerEngines.com
Breather/Oil Pan Components
A
B
C
M
L
N
K
D
E
F
H
I
J
F
G
O
J
P
A
Oil Pan
B
Gerotor Gears
C
Oil Pump O-Ring
D
Oil Pump Housing
E
Pickup Tube
F
Inlet Seal
G
Pickup Screen
H
Drain Plug
I
Crankshaft Thrust
Bearing
(Flange PTO)
J
Oil Pan Gasket
K
Breather Filter
L
Breather Gasket
M
Breather Assembly
N
Oil Seal
O
Crankshaft Non-
Thrust Bearing
(PTO)
P
Check Ball Kit
Recondition valve seat inserts following instructions
provided with valve seat cutter being used. Final cut
should be made with an 44.5° cutter as specifi ed for
valve seat angle. Cutting proper 45° valve face angle
as specifi ed, and proper valve seat angle (44.5°, half of
full 89° angle), will achieve desired 0.5° (1.0° full cut)
interference angle where maximum pressure occurs on
outside diameters of valve face and seat.
Lapping Valves
Reground or new valves must be lapped in, to provide
proper fi t. Use a hand valve grinder with a suction cup
for fi nal lapping. Lightly coat valve face with a fi ne grade
of grinding compound, then rotate valve on its seat with
grinder. Continue grinding until a smooth surface is
obtained on seat and on valve face. Thoroughly clean
cylinder head in soap and hot water to remove all traces
of grinding compound. After drying cylinder head, apply
a light coating of SAE 10 oil to prevent rusting.
Valve Stem Seals
These engines use valve stem seals on intake and
exhaust valves. Always use new seals when valves
are removed from cylinder head. Seals should also be
replaced if deteriorated or damaged in any way. Never
reuse an old seal.
