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.
i03840829
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 Systems Operation/Test-
ing and Adjusting Manual, “Valve Lash and Valve
Bridge Adjustment” article or consult your Caterpillar
dealer for the complete valve lash adjustment
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 cannot 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
measuring/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.
i01597115
Engine Valve Rotators -
Inspect
SMCS Code: 1109-040
When inspecting the valve rotators, protective
glasses or face shield and protective clothing
must be worn, to help prevent being burned by
hot oil or spray.
Engine valve rotators rotate the valves when the
engine runs. This helps to prevent deposits from
building up on the valves and the valve seats.
Perform the following steps after the engine valve
lash is set, but before the valve covers are installed:
1. Start the engine according to Operation and
Maintenance Manual, “Engine Starting” (Operation
Section) for the procedure.
2. Operate the engine at low idle.
3. Observe the top surface of each valve rotator. The
valve rotators should turn slightly when the valves
close.
NOTICE
A valve rotator which does not operate properly will
accelerate valve face wear and valve seat wear and
shorten valve life. If a damaged rotator is not re-
placed, valve face guttering could result and cause
pieces of the valve to fall into the cylinder. This can
cause piston and cylinder head damage.
If a valve fails to rotate, consult your Caterpillar
dealer.
i02784507
Fan Drive Bearing - Lubricate
SMCS Code: 1359-086-BD
Some of the fan drives have grease fittings and some
of the fan drives do not have grease fittings. If there is
no grease fitting, periodic lubrication is not required.
The fan drive requires grease only if the fan drive is
equipped with a zerk.
SEBU7125-13
125
Maintenance Section
Engine Valve Lash - Inspect/Adjust
To Next Page
Loading...