Man D 2842 LE 620, Repair Manual

Page: 37 / 180

12
13
14
Removing and installing the injectors
35
Fig. 11 and Fig. 12
Caution:
Removed pressure pipes must be re-
placed.
Insert pressure pipe into the cylinder head.
Caution:
The thin end of the pressure pipe points
towards the injection nozzle.
Replace the O-ring and apply a light coating of
grease.
Insert the connector fitting and align in such a way
that the high-pressure line can be connected with-
out tension (see also item
Á
Fig. 6).
Pretightening: 10 Nm
Fully tighten the mounting bolt for pressure flange
(see also item
À
Fig. 6).
Final tightening: 25 Nm
Angle tightening: 90
5
Fully tighten the mounting bolt for connector fitting
(see also item
À
Fig. 6).
Final tightening: 20 Nm
Angle tightening: 90
5
Check tightness of injector, pressure
pipe and leak-oil line
Caution:
After the injectors have been installed, al-
ways check to ensure that the injectors,
pressure pipes and leak-off oil lines do not
leak.
Note:
The check for leaks can only be per-
formed for one row of cylinders at a time.
Fig. 13 and Fig. 14
D
Remove the high-pressure lines to the individ-
ual cylinders on the rail or on the connector fit-
ting
D
Connect test device
Á
up to the ring piece of
the leak-oil pipe
À
D
Pump approx. 2 bar pressure to fuel system
The pressure must not drop for a period of 3 min-
utes.
If there is a leak in the fuel system, the injectors
have to be removed once again. Check the re-
moved parts for damage or soiling - replace if
necessary and then refit, observing the greatest
possible cleanliness.
1
2
1