Perkins 402J-05 Operation And Maintenance Manual page 90

90
Maintenance Section
Fan Clearance - Check
Only qualified service personnel 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.
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
measuring/adjusting valve lash clearance.
Ensure that the engine is stopped before measuring
the valve lash. The engine valve lash can be
inspected and adjusted when the temperature of the
engine is hot or cold.
Refer to Systems Operation, Testing and Adjusting,
"Engine Valve Lash - Inspect/Adjust" for more
information.
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
NOTICE
Fan Clearance - Check
(Industrial Engine)
Illustration 69
Typical example
Ensure that the engine is stopped. Ensure that the
battery disconnect switch is in the OFF position.
Ensure that the cooling system is full.
The clearance between the cover (2) and the fan (1)
will require checking. The gap between the edge of
the cover and the tip of the fan blade (A) must be
checked in four equally spaced positions. The fan
blade should be as central as possible in the cover.
The minimum fan tip clearance is 2 mm
(0.07874 inch). If it is not possible to achieve the
minimum fan tip clearance, inspect the radiator
mounts. Refer to this Operation and Maintenance
Manual, "Engine Mounts - Inspect" for further
information.
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