Kohler Command PRO CH620-CH740 Owner's Manual page 88

Reassembly
Install Plastic Debris Screen
Failure to utilize or reassemble debris screen
as designed could result in debris screen
failure and serious personal injury.
If engine has a plastic debris screen, snap screen onto
fan. Due to possibility of damaging posts during removal,
install retainers on different posts from which they were
removed. Start retainers by hand, then push them down
with a 13 mm (1/2") socket until they lock. If engine has
a metal screen, it will be installed later.
Cylinder Head Components
A Valve
E Cap
I Valve Spring
M Rocker Arm
Install Hydraulic Lifters
NOTE: Hydraulic lifters should always be installed in
same position as before disassembly. Exhaust
lifters are located on output shaft side of engine
while intake lifters are located on fan side of
engine. Cylinder numbers are embossed on top
of crankcase and each cylinder head.
1. Refer to Disassembly/Inspection and Service for
lifter preparation (bleed down) procedures.
2. Apply camshaft lubricant to bottom surface of each
lifter. Lubricate hydraulic lifters and lifter bores in
crankcase with engine oil.
80
CAUTION
B
A
C
B Stud
F Valve Stem Seal
J Valve Spring Retainer
N Rocker Arm Pivot
KohlerEngines.com
Install Supports for Metal Debris Screen
1. If a metal debris screen is used, with threaded
individual supports, install a spacer washer on
external threads. Apply Loctite
onto threads. Install four supports as shown.
2. Tighten supports with a torque wrench to 9.9 N·m
(88 in. lb.). Debris screen will be installed to supports
after blower housing is in place.
K
G
J
I
H
F
E
D
C Gasket
G Hydraulic Lifter
K Push Rod
O Valve Cover O-ring
3. Note mark or tag identifying hydraulic lifters as either
intake or exhaust and cylinder 1 or cylinder 2. Install
hydraulic lifters into their appropriate location in
crankcase. Do not use a magnet.
Valve Stem Seals
These engines use valve stem seals on intake valves
and occasionally on exhaust valves. Always use a new
seal whenever valve is removed or if seal is deteriorated
or damaged in any way. Never reuse an old seal.
242
® ®
P
O
N
M
L
D
H
L Valve Keeper
P Valve Cover
24 690 06 Rev. K
(removable)
Spark Plug
Retainer