Injection Pump
Maintenance / Disassembly and reassembly
A5.05. 07.03.01.00
M20
en / 04.07.1994 IB001436 3/3
07
Ĺ
Note:
Insert O-rings with vaseline untwisted into slots, do not pull across sharp edges of
the components.
During visual inspection pay special attention to the following wear phenomena:
• plunger, scores marks on the running 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 faces, dented seat, worn pressure spring
• pressure plate/cam follower body, worn plunger contact face and needle guide
• fuel supply and discharge bores in the connecting flange, cavitation, erosion
2. Reassembly
2.1 The reassembly is carried out in reverse order to the disassembly procedure.
Attention:
During reassembly see that the barrel is locked and that the marking of control rack -
control sleeve and control sleeve - plunger coincide.
2.2 Grease contact surfaces between valve support (17), constant pressure release (24)
and barrel (23) thinly with absolutely clean Molykote paste “G-Rapid Plus”.
2.3 Coat threads and contact surfaces of the following screws with Molykote paste
“G-Rapid Plus” and tighten crosswise with tightening torque:
Fillister head screw (Fig. 1/4)
M = 25 Nm
Fillister head screw (19)
M = 45 Nm
Imoact screws (1 and 2)
M = 50 Nm
During disassembly of the lower valve plate (5)
Fillister head screw (25)
M = 40 Nm
2.4 Check freedom of motion of the control rack.
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