Kohler Command PRO CH620-CH740 Owner's Manual page 69

Clean all parts thoroughly as engine is disassembled.
Only clean parts can be accurately inspected
and gauged for wear or damage. There are many
commercially available cleaners that will quickly remove
grease, oil, and grime from engine parts. When such a
cleaner is used, follow manufacturer's instructions and
safety precautions carefully.
Make sure all traces of cleaner are removed before
engine is reassembled and placed into operation. Even
small amounts of these cleaners can quickly break down
lubricating properties of engine oil.
Disconnect Spark Plug Leads
NOTE: Pull on boot only, to prevent damage to spark
plug lead.
1. Disconnect leads from spark plugs.
2. Shut off fuel supply.
Drain Oil from Crankcase and Remove Oil Filter
1. Remove oil fi ll cap, dipstick, and 1 oil drain plug.
2. Allow ample time for oil to drain from crankcase and
oil fi lter.
3. Remove and discard oil fi lter.
4. An oil cooler is standard equipment on some models
and an option on others. It may be a cast aluminum
housing, part of oil fi lter adapter, or attached to
blower housing, separated from oil fi lter adapter. If
so equipped, remove adapter and cooler.
Remove Muffl er
Remove exhaust system and attaching hardware from
engine. On engines equipped with a port liner, remove it
now.
Remove Air Cleaner Assembly
Low-Profi le Air Cleaner
1. Unhook latches or loosen knob and remove cover.
2. Remove wing nut from element cover.
3. Remove element cover, air cleaner element with
precleaner and stud seal.
4. Remove screws securing bracket and base.
Additional rear screws must be removed if engine
contains a rear air cleaner support bracket.
5. Remove bracket then remove base and gasket while
carefully pulling rubber breather tube through base.
6. Remove rubber breather tube from breather cover.
Heavy-Duty Air Cleaner
1. Disconnect breather hose from fi tting in adapter or
elbow.
2. Remove screws (one-barrel carburetor models), or
nuts (two-barrel carburetor models), securing
adapter or elbow.
3. Remove screws securing main support bracket for
air cleaner to valve covers. On two-barrel carburetor
models, remove mounting screws into top of intake
manifold. Unhook choke return spring if equipped.
Do not lose any hardware.
24 690 06 Rev. K
Disassembly/Inspection and Service
4. Remove heavy-duty air cleaner as an assembly from
engine.
Remove Fuel Pump
Explosive Fuel can cause fi res and severe
burns.
Do not fi ll fuel tank while engine is hot or
running.
Gasoline is extremely fl ammable and its vapors can
explode if ignited. Store gasoline only in approved
containers, in well ventilated, unoccupied buildings,
away from sparks or fl ames. Spilled fuel could ignite
if it comes in contact with hot parts or sparks from
ignition. Never use gasoline as a cleaning agent.
Pulse Style Pumps
1. Disconnect fuel lines at carburetor and at in-line fuel
fi lter.
2. Disconnect pulse (vacuum) line from crankcase, or
from valve cover on earlier models.
3. Remove screws securing fuel pump to bracket or to
blower housing. Fuel pump body may be metal or
plastic.
4. Note or mark orientation of fuel pump, then remove
fuel pump with lines attached as shown.
Mechanical Fuel Pump
A mechanical style fuel pump is part of valve cover
assembly.
1. Disconnect fuel lines at pump outlet and at in-line
fuel fi lter.
2. Fuel pump will be removed with valve cover. Refer to
valve cover removal procedure.
Remove Control Panel (if equipped)
1. Disconnect Oil Sentry
2. Disconnect choke control cable from control bracket.
3. Disconnect throttle control cable or shaft.
4. Remove panel from blower housing.
KohlerEngines.com
WARNING
indicator light wires.
™
61