Cylinder Head Components; Remove Valve Covers; Remove Cylinder Heads And Hydraulic Lifters; Bleeding Lifters - Kohler Command PRO CV940 Service Manual

Disassembly/Inspection and Service

Cylinder Head Components

B
Gasket
A
Guide Plate
E
Valve Stem Seal
I
Valve Spring Keeper
M
Rocker Stud
Q

Remove Valve Covers

1. Remove screw and grommet securing each valve
cover.
2. Remove valve cover and seal from each cylinder
head. Note locations of individual valve covers if
they are different.

Remove Cylinder Heads and Hydraulic Lifters

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. Loosen inner set screws and back off rocker arm
adjusting nuts.
2. Remove pipe plug from cylinder head to access
screw in center location.
3. Remove screws securing each cylinder head. Note
locations of washers and spacer.
4. Mark position of push rods as either intake or
exhaust and cylinder 1 or 2. Push rods should
always be reinstalled in same positions.
5. Carefully remove push rods, cylinder head, and
head gasket.
46
C
D
E
F
G
H
A
Valve
B
Spacer
F
Valve Spring
J
Push Rod
N
Valve Cover Seal
R
KohlerEngines.com
L
N
O P
I
J
K
M
Cylinder Head
C
Washer
G
Valve Spring Retainer
K
Rocker Arm
O
Valve Cover
S
6. Repeat procedure for other cylinder head.
7. 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.
Inspection
Check base surface of hydraulic lifters for wear or
damage. If lifters need to be replaced, apply a liberal
coating of Kohler lubricant to base of each new lifter
before it is installed.

Bleeding Lifters

To prevent a possible bent push rod or broken rocker
arm, it is important to bleed any excess oil out of lifters
before they are installed.
1. Cut a 50-75 mm (2-3 in.) piece from end of an old
push rod and chuck it in a drill press.
2. Lay a rag or shop towel on table of drill press and
place lifter, open end up, on towel.
3. Lower chucked push rod until it contacts plunger in
lifter. Slowly pump plunger 2 or 3 times to force oil
out of feed hole in side of lifter.
Q
R
S
Pipe Plug
D
Spark Plug
H
Hydraulic Lifter
L
Rocker Arm Pivots
P
Grommet
T
62 690 02 Rev. D
T