Kohler command pro CH742 Service Manual page 45

Remove Intake Manifold
1. Remove screws securing intake manifold to cylinder
heads. Note which screws hold wiring clamps.
2. Remove intake manifold and intake manifold
gaskets.
3. Leave wiring harness attached to manifold.
Cylinder Head Components
A Valve
E Cap
I Valve Spring
M Rocker Arm
Remove Spark Plugs
Remove spark plug from each cylinder head.
Remove Cylinder Heads and Hydraulic Lifters
NOTE: Cylinder heads are retained using either screws
or nuts and washers on studs. Do not
interchange or mix components, as cylinder
heads may have different machining, unique to
each fastening method.
NOTE: Exhaust lifters are located on output shaft side
of engine while intake lifters are located on fan
side of engine. Cylinder head number is
embossed on outside of each cylinder head.
1. Remove screws or nuts and washers securing each
cylinder head. Unless screws are damaged or
questionable, they can be reused. Discard nuts and
washers once removed; do not reuse. Studs (if
present) should only be removed if damaged or if
cylinder reconditioning is necessary. Once removed,
they must be replaced.
24 690 34 Rev. D
B
A
C
B Stud
F Valve Stem Seal
J Valve Spring Retainer
N Rocker Arm Pivot
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Disassembly/Inspection and Service
Remove Valve Covers
1. Remove screws securing each valve cover. Note
position of any attached brackets or lifting straps.
2. Remove valve covers, O-rings, and any brackets or
lifting straps. Note which side of engine has oil fi ll
and or fuel pump valve cover.
K
G
J
I
H
F
E
D
C Gasket
G Hydraulic Lifter
K Push Rod
O Valve Cover O-ring
2. Mark position of push rods as either intake or
exhaust and cylinder 1 or 2. Push rods should
always be reinstalled in same positions.
3. Carefully remove push rods, cylinder heads and
head gaskets.
4. Remove lifters from lifter bores. Use a Hydraulic
Lifter Tool. Do not use a magnet to remove lifters.
Mark lifters by location, as either intake or exhaust
and cylinder 1 or 2. Hydraulic lifters should always
be reinstalled in same position.
P
O
N
M
L
D
H
L Valve Keeper
P Valve Cover
Spark Plug
Retainer
45