Kohler Aegis LH775 Service Manual page 66

Disassembly/Inspection and Service
Cylinder Head Components
A
A Valve
E Valve Stem Seal
I Valve Spring Keepers
M Valve Cover
Remove Valve Covers
1. Remove screws from two lower valve cover
mounting locations on each side.
2. Remove valve covers and valve cover gaskets. Note
on which side oil fi ll or fuel pump is located, for
correct reassembly later.
Remove Spark Plugs
1. Remove spark plugs from cylinder heads using a
spark plug socket.
Remove Cylinder Heads and Valve Lifters
NOTE: It is not necessary to remove cylinder studs from
crankcase unless replacement is intended. If
studs are removed for any reason, discard old
stud(s), do not reuse/reinstall. Use new studs
and refer to assembly sequence for proper
installation.
1. Rotate crankshaft of engine until valves of one
cylinder are closed. Loosen rocker arm screws until
rocker arms can be pivoted to free push rods.
66
C
B
E
B Head
F Valve Spring Cap
J Rocker Arms
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D
I
H
G
F
C Hydraulic Lifter
G Spring
K Rocker Arm Pivot
2. Remove push rods and mark their location as either
intake or exhaust, and cylinder 1 or 2. Push rods
should always be reinstalled in their original position.
3. Repeat for opposite cylinder.
4. Remove nuts and washers from cylinder head studs.
Carefully remove cylinder heads and head gaskets.
5. Remove hydraulic lifters using a hydraulic lifter
removing tool (do not use a magnet). Mark them
similar to push rods (intake or exhaust and cylinder 1
or 2). Hydraulic lifters should always be reinstalled in
their original location.
M
L
K
J
D Push Rods
H Valve Spring Retainers
L Rocker Arm Screw
66 690 07 Rev. --