Disassemble Cylinder Heads - Kohler command pro ECH749 Service Manual

Inspection
Check base surface of hydraulic lifters for wear or damage. If lifters need to be replaced, apply a liberal coating of
Kohler lubricant (see Tools and Aids) 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.

Disassemble Cylinder Heads

NOTE: These engines use valve stem seals on intake and exhaust valves. Use a new seal whenever valve is
removed or if seal is deteriorated or damaged in any way. Never reuse an old seal.
1. Remove screws, rocker arm pivots and rocker arms from cylinder head.
2. Compress valve springs using a valve spring compressor.
3. Once valve spring is compressed, remove valve spring keepers, then remove following items.
● Valve spring retainers
● Valve springs
● Valve spring caps
● Intake and exhaust valve (mark position)
● Valve stem and seals (intake and exhaust)
4. Repeat above procedure for other cylinder head. Do not interchange parts from 1 cylinder head to other.
24 690 01 Rev. K
Disassembly/Inspection and Service
KohlerEngines.com 111