Injection Pump
Maintenance / Disassembly and reassembly
A5.05. 07.03.01.02
M20
en / 16.06.1997 IB003279 3/4
07
Ĺ
1.10 Dismantle the fuel outlet throttle screw
(Fig.2/30) and the fuel inlet throttle
screw (31).
1.11 Clean all parts with gas oil and
a hard brush and blow through with
compressed air. Check lube oil bores
for free passage.
1.12 Renew all O-rings and sealing rings.
Note:
Insert O-rings with vaseline untwisted
into slots, do not pull across sharp ed-
ges of the components.
During visual inspection pay special at-
tention to the following wear phenome-
na:
• plunger, scores marks on the run-
ning surface. Control helix worn by
cavitation or erosion
• barrel: score marks in the running
surface
• piston with barrel, sliding fit of the
piston in the barrel
• impact screws, cavitation,
• pressure valve: damaged contact fa-
ces, dented seat, worn pressure
spring
• pressure plate/cam follower body,
worn plunger contact face and need-
le guide
• fuel supply and discharge bores in
the connecting flange, cavitation,
erosion
33
32
30
31
2
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