Kohler COMMAND CH18-745 User Manual download pdf (Page 167)

9.14

Section 9

Disassembly

Figure 9-53. Valve Train Components.

Figure 9-51. Removing Rocker Arms.

2. Compress the valve springs using a valve spring

compressor. See Figure 9-52.

Figure 9-52. Removing Valves with Valve Spring

Compressor.

Disassemble Cylinder Heads

1. Remove the two hex. flange screws, rocker arm

pivots and rocker arms from the cylinder head.

See Figure 9-51.

3. Once the valve spring is compressed, remove the

following items. See Figures 9-53 and 9-54.

• Valve spring keepers

• Valve spring retainers

• Valve springs

• Valve spring caps

• Intake and exhaust valves (mark position)

• Valve stem seals (intake valve only)

Valve

Retainer

Spring

Keepers

Cap

Valve Seal

Figure 9-54. Intake Valve Seal Location.

NOTE: These engines use valve stem seals on the

intake valves. Use a new seal whenever valve

is removed or if the seal is deteriorated in any

way. Never reuse an old seal.

4. Repeat the above procedure for the other cylinder

head. Do not interchange parts from one cylinder

head to the other.

Remove Grass Screen and Fan

1. Small metal retainers are typically attached on

three of the seven mounting posts for positive

retention of the plastic grass screen. Use a hook-

end tool next to the post and pull outward to

separate each of the small metal retainers. Then

unsnap the fan from the remaining mounting

posts. See Figure 9-55.

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Kohler COMMAND CH18-745 User Manual Page 167

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