Illustration 107 g00746166
Typical location of the grease fitting (if equipped) that
is for the fan drive bearing
The pulley is shown with the belt guards that have
been removed.
Lubricate the grease fitting that is on the fan drive
bearing with High Speed Ball Bearing Grease or the
equivalent.
Inspect the fan drive pulley assembly for wear or for
damage. If the shaft is loose, an inspection of the
internal components should be performed. Refer to
the Systems Operation Testing and Adjusting Manual
for additional information.
i00705823
Fuel Control Linkage - Check/
Lubricate
SMCS Code: 1257-535; 1257-086
Check the fuel control linkage for proper operation. If
necessary, adjust the fuel control linkage . Refer to
the Service Manual for the adjustment procedures.
Illustration 108 g00309003
Typical grease fittings on the fuel control linkage
Some fuel control linkages require lubrication.
Lubricate the grease fittings with 1P-0808
Multipurpose Grease or the equivalent.
i00626014
Fuel Injection Nozzles - Test/
Exchange
SMCS Code: 1254-081; 1254-013
Fuel leaked or spilled onto hot surfaces or electri-
cal components can cause a fire.
NOTICE
Do not allow dirt to enter the fuel system. Thoroughly
clean the area around a fuel system component that
will be disconnected. Fit a suitable cover over discon-
nected fuel system component.
Fuel injection nozzles are subject to tip wear. Tip
wear is a result of fuel contamination. Tip wear can
cause the following problems:
• Increased fuel consumption
• Black smoke
• Misfire
• Rough running
Fuel Injection nozzles should be cleaned, inspected,
tested, and replaced, if necessary. Refer to Special
Instruction, SEHS7292 for using the 8S-2245
Injection Cleaning Tool Group. Consult your
Caterpillar dealer about cleaning the fuel injection
nozzle and testing the fuel injection nozzle.
NOTICE
Never wire brush or scrape a fuel injection nozzle.
Wire brushing or scraping a fuel injection nozzle will
damage the finely machine orifice. Proper tools for
cleaning and testing the fuel injection nozzles can be
obtained from Caterpillar dealers.
The following items are symptoms of a malfunction of
the fuel injection nozzle:
• Abnormal engine operation
• Smoke emission
• Engine knock
Each fuel injection nozzle must be isolated one at a
time in order to determine the malfunctioning fuel
injection nozzle.
1. Start the engine.
126
SEBU7125-13
Maintenance Section
Fuel Control Linkage - Check/Lubricate
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