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M0087475-06
5. Check frequently for leaks such as oil, coolant, and
fuel during the first few hours of operation. Repair
any leaks as soon as detected.
Engine Valve Lash - Check
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.
NOTICE
Only qualified service personel should perform this
maintenance. Refer to the Service Manual or your au-
thorized Perkins dealer or your Perkins distributor for
the complete valve lash adjustment procedure.
Operation of Perkins engines with incorrect valve
lash can reduce engine efficiency, and also reduce
engine component life.
The initial valve lash adjustment on new engines,
rebuilt engines, or remanufactured engines 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 as part of a
lubrication and preventive maintenance schedule to
help provide maximum engine life.
Note: All engine ratings must have the engine valve
lash performed at 2500 hours.
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.
During valve adjustment, visibly inspect the valve
train of wear or damage.
Refer to Systems Operation, Testing and Adjusting,
"Engine Valve Lash - Inspect/Adjust" for more
information.
Fuel System - Prime
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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 any
disconnected fuel system components.
Key-on Priming (if equipped)
1. Turn the engine start switch to the ON position.
Leave the engine start switch in the ON position
for 2 minutes.
2. Verify that the water separator is full of fuel.
3. If the water separator is not full of fuel, turn the
engine start switch OFF and then turn the engine
start switch ON. Turning the switch OFF, then ON
will cycle the fuel priming pump again.
4. When the water separator is full of fuel, attempt to
start the engine. If the engine starts and the
engine runs rough or the engine misfires, operate
at low idle until the engine is running smoothly. If
the engine cannot be started, or if the engine
continues to misfire or smoke, repeat Step 1.
Manual Switch Priming (if
equipped)
The manual switch is located on the primary filter
base/electric priming pump assembly.
1. Hold the manual switch in the up position until fuel
has filled the water separator.
2. Continue to hold the switch for 30 seconds after
the water separator is full.
Maintenance Section
Engine Valve Lash - Check
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NOTICE
121
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