MAK M 20 - Page 263

Injection Pump
Maintenance / Disassembly and reassembly
A5.05. 07.03.01.00
15000, 7500
M20
en / 31.05.2010 IB001436 2/3
07
1.4 Loosen fillister head screws (Fig. 1/4) uni-
formly.
Remove injection pump bottom part (3)
with lower spring seat from injection pump
housing (5). Take care of fixing pin.
1.5 Remove the following single components
from injection pump housing (6):
Cam follower body (7), pressure plate (8),
distance plate (9), slot washer (10) (a
unit), pump spring (11), spring seat (12),
control sleeve (13), pump plunger (14).
1.6 Unscrew guide screw (15), pull control rod
(16) out of injection pump housing (6) and
check toothing.
1.7 Clamp injection pump housing (6) with val-
ve support pointing upwards (17). Uns-
crew locking screw (18).
1.8 Loosen fillister head screws (19) and
remove valve support (17). Take care of
stop (20) pressure valve spring (21), and
pressure valve (22).
1.9 Drive barrel (23) and constant pressure
release (24) with suitable piece of rounded
wood out of the injection pump housing
(6).
1.10 Clean all parts with gas oil and
a hard brush and blow through with
compressed air. Check lube oil bores
for free passage.
1.11 Renew all O-rings and sealing rings.
WARNING
Caution spring tension!
19
17
24
1
18
6
15
16
4
7
Fig. 1
21
20
22
23
2
14
13
12
11
10
9
8
3
25
5