Perkins 4006 User Handbook Manual page 41

WARNING
CHANGING THE FILTERS WHILST THE
ENGINE IS RUNNING.
CHANGING THE FILTER ELEMENTS
WITHOUT STOPPING THE ENGINE
The normal position of the change-over
valve is with marking on the valve spindle for
the spanner showing the leg of the inverted
T pointing upwards when both filter elements
are in circuit. Turning the valve with the
spanner provided so that the leg of the T
points to the left, puts the right hand filter out
of service, so that it may be exchanged for a
new one, fill the new filter with clean oil
before fitting. Turning the valve so that the
leg points to the right, puts the left hand filter
out of service, so that this one can now be
exchanged for a new filter canister. The
valve is then returned to its original position,
so that both elements of the filter are back in
service. Check for oil leaks.
Fig. 32
4006/8 Diesel, May 1998
REDUCE ENGINE
SPEED TO IDLING IF
MAINTENANCE PROCEDURES
NOTE: Prepare for a small spillage of oil
from the filter as each canister is removed,
by placing a container of about 5 litres or 1
gallon capacity under the filter.
Note the piston jet filters which can only
be changed with the engine stopped.
(Fig. 32)
1. Change right filter
2. Normal running position
3. Change left filter
4. Dirty oil into filter
5. Clean oil into engine
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