Mitsubishi diesel engines, Service Manual, Page: 195 / 219

ENGINE - INSPECTION / ADJUSTMENT, RUNNING-IN TRIAL AND PERFORMANCE TEST
8 - 6
1.5 Alternative adjustment method
Removing the delivery valve to check and adjust
the fuel injection timing is a sure way to observe
fuel coming out and stop. However, this also
runs the risk of allowing foreign matter to enter
into the system. The following alternative
method can be tried which allows you to check
the fuel injection timing without removing the
delivery valve.
(1)
Disconnect the No. 1 fuel injection pipe at the
nozzle holder end.
(2) Slowly rotate the crankshaft clockwise while
observing the open end of the pipe. When fuel
starts to bulge out from the pipe end, check the
location of the IT mark on the crankshaft pulley.
In this case, allow for approx. 1º from the
specified fuel injection timing.
Note: Bleed the system of air before rotating the
crankshaft.
1.6 Replacing the fuel filter
(1) Fuel filter with selector cock
(a) Close the cock lever. Loosen the ring nut, then
remove the filter element.
(b)
Install a new filter element.
(c)
Using a new O-ring, tighten the ring nut.
(d)
Open the cock lever. Bleed the filter of air.
(2)
Fuel filter (cartridge type)
Replace the entire fuel filter assembly. After
replacement, bleed the filter of air.
Removing the No. 1 fuel injection pipe
Timing marks (2)
Counter mark on
gear case
IT mark
Replacing the fuel filter
Replace also when water or sediment has
accumulated inside.
Replace:
every 500 hours
Replace: O-ring
Cock lever
(closed)
Filter element
Ring nut
Replace:
every 500 hours
Replace also when water
or sediment has
accumulated inside.