Perkins 4008 - Maintenance Procedures (Continued); Fuel Filter Element Changes (Running)

MAINTENANCE PROCEDURES
4006/8 Diesel, May 1998 39
CHANGING THE CHANGE OVER FUEL
FILTER ELEMENTS WHEN THE ENGINE
IS RUNNING
Both filters are in use with the change over
lever in the vertical position. Moving the lever
to the left puts the right hand filter out of
service (1) see Fig. 35 and Fig. 36 and
moving it to the right for the left hand filter.
With the lever positioned remove the
appropriate filter canister using a strap
wrench see Fig. 35 fill the new filter with fuel
apply a smear of engine oil to the rubber
seal, then screw the canister onto the
housing using firm hand pressure. Air must
be vented from each new filter slacken the
vent screw (2) Fig. 33 slowly raise the lever
toward the vertical position stop when fuel
flows from vent screw, when air free fuel
flows tighten the vent screw return the lever
to the vertical position and repeat the
operation on the second filter. Wipe any
spilled fuel from the filter unit, check for leaks
at idling and normal running speed.
NOTE: Prepare for some spillage of fuel by
placing a bowl of about 5 litres or 1 gallon
capacity under the filter when changing the
capacities.
Key
(Fig. 35)
1. Both filters in use (Normal Running
Position)
2. Change right hand filter
3. Change left hand filter
REDUCE ENGINE
SPEED TO IDLING IF
CHANGING THE FILTERS WHILST THE
ENGINE IS RUNNING.
WARNING
Fig. 35
1
2
3
1157.2
Fig. 36
1156.3