Kohler 15RES, Руководство пользователя

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TP-6344 4/09 26 Section 3 Scheduled Maintenance
Battery short circuits. Explosion can cause severe injury
or death.
Short circuits can cause bodily injury and/or
equipment damage. Disconnect the battery before generator
set installation or maintenance. Remove all jewelry before
servicing the equipment. Use tools with insulated handles.
Remove the negative (--) lead first when disconnecting the
battery.
Reconnect the negative (--) lead last when
reconnecting the battery. Never connect the negative (--)
battery cable to the positive (+) connection terminal of the
starter solenoid. Do not test the battery condition by shorting
the terminals together.
3.10 Ignition System
Service the spark plugs at the interval specified in the
service schedule using the following procedure.
Spark Plug Service Procedure
1. Place the generator set master switch in the OFF
position.
2. Disconnect the power to the battery charger, if
equipped.
3. Disconnect the generator set engine starting
battery, negative (--) lead first.
4. Remove spark plug wires by grasping the spark
plug boot and turning slightly while pulling. Do not
pull the wire. Pulling on the wire rather than the
boot may damage the wire or terminal.
5. Loosen the spark plug with a ratchet and 5/8-in.
spark plug socket with a rubber insert to prevent
spark plug damage.
6. Use compressed air to remove dirt from around
each spark plug to prevent dirt particles from falling
into the combustion chamber.
7. Remove spark plugs, one at a time, and examine.
Identify a normal spark plug in good operating
condition by observing a light tan or gray deposit on
firing tip.
See Figure 3-9 to evaluate engine
condition by color/condition of a problem spark plug.
Problem/Condition Means of Identification Possible Cause/Solution
Gap-bridged spark
plug Built-up deposits and gap between electrodes
closing. Oil or carbon fouling. Clean and regap the spark
plug.
Oil-fouled spark plug Wet, black deposits on the insulator shell, bore,
and electrodes. Excessive oil entering combustion chamber
through worn rings and pistons, excessive
clearance between valve guides and stems, or
worn or loose bearings. Replace the spark plug.
Carbon-fouled spark
plug Black, dry, fluffy carbon deposits on insulator
tips, exposed shell surfaces and electrodes. Incorrect spark plug, weak ignition, clogged air
intake, overrich fuel mixture, or excessive
no-load operation. Clean and regap the spark
plug.
Lead-fouled spark plug Dark gray, black, yellow, or tan deposits; or a
glazed coating on the insulator tip.
Caused by highly leaded fuel. Replace the
spark plug.
Pre-ignition damaged
spark plug Melted electrodes and possibly blistered
insulator. Metallic deposits on insulator suggest
internal engine damage. Wrong type of fuel, incorrect timing or advance,
too hot a plug, burned valves, or engine
overheating. Replace the spark plug.
Overheated spark plug White or light gray insulator with small black or
gray/brown spots with bluish (burned)
appearance on electrodes.
Engine overheating, wrong type of fuel, loose
spark plugs, too hot a plug, low fuel pressure or
incorrect ignition timing. Replace the spark plug.
Worn spark plug Severely eroded or worn electrodes. Caused by normal wear and failure to replace
spark plug at prescribed interval. Replace the
spark plug.
Figure 3-9 Engine Evaluation Using Spark Plug Condition