TESTING AND ADJUSTING
EX20 Series 20-9
FUEL INJECTION TIMING
1. TESTING OF INJECTION TIMING (1)
Match the “T.D.C. mark” (top dead center mark)of the
crankshaft pulley to the “pointer”.
When the “pointer” is matched to the “T.D.C. mark”, if
the stamp line on the injection pump plate is matched
to the pointer on the timing gear case cover, the
injection pump is installed normally.
2. TESTING OF INJECTION TIMING (2)
1) Remove the No. 1 injection pipe, then remove
the No. 1 delivery holder of the injection pump.
Pull out the delivery valve and spring, then
tighten only the holder to 39–44 Nm {4.0–4.5
kgm}.
2) Rotate the crank pulley about 30 degrees coun-
terclockwise from the “T.D.C. mark”.
3) Operating the feed pump by the hand, slowly
rotate the crank pulley clockwise, and the dis-
charge of fuel from the No. 1 delivery holder of
the injection pump is reduced to zero.
4) At the point where the discharge of fuel stops
(injection timing), check the mark of the crank
pulley indicated by the pointer tip.
5) Clean the removed delivery valve and spring,
then install them again and tighten the delivery
holder to the “specified torque”. If the tightening
torque of 39–44 Nm {4.0–4.5 kgm} is not
observed, hunting and other troubles may occur.
6) When removing and installing the delivery valve
and spring, take care that dust does not enter
the openings.
Injection
timing
6BG1T
(Isuzu)
6° (TRL-01), 8° (TRL)
(BTDC)
If deviation exceeds ± 2°, adjust it.
FUEL INJECTION TIMING
To Next Page
Loading...
Need help?
General
