Kohler Command PRO ECV630 Service Manual page 95

Remove Fuel Injectors
1. Disconnect electrical connector.
2. Remove screw and pull injector out of intake
manifold for each injector.
3. When removed, pull metal retaining clip connecting
fuel injector to fuel injector cap. There may be some
fuel left in line. Any spilled fuel must be cleaned up
immediately.
Remove Intake Manifold
1. Remove screw securing a ring terminal which is part
of wiring harness.
2. Remove screws securing intake manifold to cylinder
heads. Note which screws hold wiring clamp.
3. Unclasp wiring harness from clip using a
screwdriver.
4. Remove intake manifold and intake manifold
gaskets.
5. Leave wiring harness attached to manifold.
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.
1. Remove screws or nuts and washers securing each
cylinder head. Discard screws or 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.
2. Mark location 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.
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.
24 690 02 Rev. D
Disassembly/Inspection and Service
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 one cylinder head to
other.
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