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Maintenance Section
Engine Valve Lash - Inspect/Adjust
NOTICE
During testing, abnormal operating conditions must be
simulated.
The tests must be performed correctly in order to pre-
vent possible damage to the engine.
To prevent damage to the engine, only authorized
service personnel or your Caterpillar dealer should
perform the tests.
Visual Inspection
Visually check the condition of all gauges, sensors
and wiring. Look for wiring and components that
are loose, broken, or damaged. Damaged wiring
or components should be repaired or replaced
immediately.
i00869628
Engine Valve Lash -
Inspect/Adjust
SMCS Code: 1102-025
The initial valve lash adjustment on new engines,
rebuilt engines, or remanufactured engines is
recommended at the first scheduled oil change.
The adjustment is necessary due to the initial wear
of the valve train components and to the seating of
the valve train components.
This maintenance is recommended by Caterpillar
as part of a lubrication and preventive maintenance
schedule in order to help provide maximum engine
life.
NOTICE
Only qualified service personnel should perform this
maintenance. Refer to the Service Manual or your
Caterpillar dealer for the complete valve lash adjust-
ment procedure.
Operation of Caterpillar engines with improper valve
adjustments can reduce engine efficiency. This re-
duced efficiency could result in excessive fuel usage
and/or shortened engine component life.
Ensure that the engine can not be started while
this maintenance is being performed. To help pre-
vent possible injury, do not use the starting motor
to turn the flywheel.
Hot engine components can cause burns. Allow
additional time for the engine to cool before mea-
suring/adjusting valve lash clearance.
Ensure that the engine is stopped before measuring
the valve lash. To obtain an accurate measurement,
allow the valves to cool before this maintenance
is performed.
Refer to the Service Manual for more information.
i00850658
Fuel Injection Timing - Check
SMCS Code: 1251-036-TM; 1290-036-TM
Note: The correct fuel timing specification is
found on the Engine Information Plate. Fuel
timing specifications may vary for different engine
applications and/or for different power ratings.
A qualified mechanic should adjust the fuel injector
timing because special tools and training are
required.
Refer to your Caterpillar dealer for the complete
adjustment procedure for the fuel injector timing.
i01015310
Fuel Inlet Screen - Clean
SMCS Code: 1256-070
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.
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