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Workshop Manual_3 - 4 LD_cod. ED0053025560_
4° ed
_ rev.
03
ADJUSTMENT
Minimum rpm adjustment at idle running (standard)
After filling the engine with oil and fuel, start and warm up the
engine for 10 minutes.
Actuating the adjusting screw
1
, set the idling at 1150 rpm; then
fasten the lock nut.
Injection pump delivery adjustment (standard)
This adjustment shall be carried out with the engine at
dynamometric brake, otherwise the resulting adjustment could
be approximate; in this case operate as it follows.
· Unloose the screws
1
and
2
by 1/4 of a turn
· Move the limiting device
3
, thus the screw
2
stays in the centre
of the slot. Tighten the screws
1
and
2
.
Carry out the exhaust smoke check as it follows:
· Abruptly start the accelerator at idle.
In case of a quick pickup with light exhaust smoke to the Bosch
scale index
3
, this means that the limiting device is correctly
adjusted.
· In case of a slow pickup without smoke, move the limiting
device towards the left (pumping duration increase).
· In case of a rapid pickup with thick smoke (exceeding index
3
of Bosch scale), move the limiting device towards the right
(pump duration decrease).
Peak rpm adjustment at idle (standard)
After adjusting the minimum rpm, set the screw 2 and adjust the
peak rpm at 3200 rpm at idle; then fasten the lock nut.
Note
: The peak rpm standard idle adjustment of 4LD 820 shall
be carried out at 2800 rpm.
Summary of Contents for 3LD 450
Page 1: ...WORKSHOP MANUAL Engine Series 3 4 LD ...
Page 9: ... 9 Workshop Manual_3 4 LD_cod ED0053025560_4 ed_ rev 03 ...
Page 45: ... 45 Workshop Manual_3 4 LD_cod ED0053025560_4 ed_ rev 03 ...
Page 46: ... 46 Workshop Manual__3 4 LD_cod ED0053025560_4 ed_ rev 03 ...
Page 47: ... 47 Workshop Manual_3 4 LD_cod ED0053025560_4 ed_ rev 03 ...
