Wacker Neuson 28Z3, Service Manual

Page: 125 / 264

SHB 28Z3 EN – Edition 2.0 * 28z3s410.fm
4-13
Engine
Fitting the injection pump
☞
Check the position of the gears by means of mark A made during removal
☞
Fit a new O-ring on the flange of the injection pump with grease
☞
Ensure that the shaft of the injection pump is clean and dry
☞
The feather key on the shaft of the injection pump must be aligned with the groove in
the hub and gear
☞
Fit the injection pump and tighten the securing screws hand tight
If the injection pump is installed in a diesel engine in which the gear casing was also
removed, alignment is possible by means of the marks on the gears of the injection pump,
camshaft, crankshaft and idler gear
➥
Ensure that all three marks (A, B, C) are aligned
• B injection pump gear
• C idler gear
• D camshaft gear
• E crankshaft gear
☞
Mount the lock nut with spring washer and tighten to the correct torque
➥
Never use oil or grease for assembly
➥
Tighten the screw of the pulley with a long spanner to fix the crankshaft in place
☞
Set the injection pump to the original position by means of the marks on the gear casing
and injection pump housing made during removal – see
Fig. 12
Notice!
If a new injection pump is fitted, the mark on the injection pump housing made at
the factory is used and must align with the mark on the gear casing.
☞
Tighten the fastening screws of the injection pump to the correct torque
☞
Fit the fuel lines back on again
☞
Hook up the Bowden cable again and fit the cutoff solenoid
☞
If a new or newly calibrated injection pump is fitted, the injection time must be checked
before all components have been fitted
➥
It is not absolutely necessary to check the original injection pump, but this is recom-
mended
– see Checking injection time on page 4-9
☞
Fit the cover of the injection pump on the gear casing and tighten the screws
➥
Apply sealing compound to the sealing surface
☞
Fit the fuel injection lines back on again
A
Fig. 16: Gear casing mark
Fig. 17: Overview of mark
C D
D
B