Breather/Oil Pan Components; Lapping Valves; Valve Stem Seals - Kohler Command PRO EFI Series Service Manual

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

Breather/Oil Pan Components

O
J
A Oil Pan
E Pickup Tube
Crankshaft Thrust
I Bearing
(Flange PTO)
M Breather Assembly
62 690 05 Rev. E
I
H
A
B Gerotor Gears
F Inlet Seal
J Oil Pan Gasket
N Oil Seal
KohlerEngines.com
Disassembly/Inspection and Service
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.
J
P
N
C Oil Pump O-Ring
G Pickup Screen
K Breather Filter
Crankshaft Non-
O Thrust Bearing
(PTO)
M
L
K
D
F
E
F
B
G
D Oil Pump Housing
H Drain Plug
L Breather Gasket
P Check Ball Kit
C
99