Wacker Neuson 28Z3, Service Manual

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4-12
SHB 28Z3 EN – Edition 2.0 * 28z3s410.fm
Engine
4.9 Removing and installing the injection pump
Removing the injection pump
☞
Mark the original position of the injection pump on the pump and gear casing – see
Mark on pump housing on page 4-11
☞
Shut off the fuel supply (fuel cock), clean the area of the injection pump and have a
container ready to collect any leaked fuel
☞
Remove the fuel injection lines, fuel and leak oil lines
➥
Close any open connections to prevent soiling and to minimise leakage
☞
Unhook the Bowden cable on the injection pump and remove the cutoff solenoid
Remove cover A of the injection pump on the gear casing
➥
Cover A is mounted with sealant, therefore separate the cover from the gear casing
with a scraper
☞
Mark position E of injection pump gear C in relation to gear position B
☞
After marking, do not turn the crankshaft
➥
Tighten the screw of the pulley with a long spanner to fix the crankshaft in place
☞
Slacken lock nut D of gear C and unscrew until the shaft end of the injection pump
☞
Use an extractor to pull off/slacken gear C on the conical shaft
☞
Loosen lock nut D completely and remove it from the gear casing with the spring
washer and gear C
Notice!
Gear C of the injection pump can be removed from the gear casing. We recom-
mend, however, leaving gear C meshed with the gear B in the gear casing.
Notice!
Do not slacken screws F of the gear of the injection pump, as these specify the
precision setting of the fuel injection pump set by the manufacturer!
➥
It is very difficult or even impossible to subsequently set the correct
injection time
☞
Remove the fuel injection pump
➥
To this purpose unscrew the three fastening screws of the injection pump
Notice!
After removing the injection pump, do not turn the crankshaft anymore
Fig. 13: Gear casing cover
A
Fig. 14: Gear casing mark
E
B
D
C
Fig. 15: Gear screws
F