MAINTENANCE SCHEDULE & CHECKLISTS
4012/16 Diesel, February 1997 5
2
EVERY 250 HOURS OR 6 MONTHS
CHANGING THE CHANGE OVER FILTER
ELEMENTS WITHOUT STOPPING THE
ENGINE
If the filters must be changed without
stopping the engine. The normal position of
the change-over valve is with the leg of the
'T' mark pointing upwards, see Fig. 44 or 45,
w
hen both filter elements are in circuit.
Turning the valve 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 which should be filled with new oil
before screwing the canister into position
using firm hand pressure only. Turning the
valve so that the leg of the 'T' points to the
right puts the left hand filter out of service, so
that this one can now be exchanged for a
new canister also primed with oil as before.
The valve is then returned to its original
position, so that both elements of the filter
are back in service. Check for leaks before
leaving the engine and increasing its speed.
Later Engines (Optional)
NOTE: Prepare for some spillage of oil as
each canister is removed, by placing a bowl
of about 5 litres or 1 gallon capacity under
the filters.
NOTE: If the pipes connecting the change-
over oil filters to the engine are removed for
any reason, it is essential that they be
reconnected correctly to avoid unfiltered oil
getting into the system. See Fig. 44 or 45.
L
eft hand side pipe (A) fitted to the oil cooler
header fits to the front of the oil filter header.
Right hand side pipe (B) fitted to the oil
cooler header fits to the rear of the filter
header.
Key
(Fig. 45)
1 Change right filter
2 Normal running
3 Change left filter
Fig. 45
A
B
