Wacker Neuson 28Z3, Service Manual

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4-10
SHB 28Z3 EN – Edition 2.0 * 28z3s410.fm
Engine
Marks (standard specification) on the flywheel:
•
6/A top dead centre with corresponding cylinder number
•
6/B 15° before top dead centre
•
6/C 20° before top dead centre
•
6/D 25° before top dead centre
•
6/E direction of rotation
☞
Turn until mark 7/ G on the ring gear for cylinder 1 is visible and at the same level as
mark 7/ F on the flywheel housing
➥
Rated injection point 16° before top dead centre (+/- 1°)
☞
Mark the (rated) injection point on the flywheel housing and ring gear
Measurement:
☞
Slacken the high-pressure fuel injection lines of cylinder 1 and push to one side
➥
The opening of injection pump A must be visible
☞
Open all fuel cocks B , see Fig. 10
Notice!
Fuel is pumped to the cylinder only every second turn of the crankshaft; for this
reason it may be necessary to turn the crankshaft twice.
☞
An auxiliary means (fuel injection line with a transparent pipe) can be mounted on the
fuel injection line for precise observation – see
Fig. 10
➥
This auxiliary means is not essential
☞
Position a spanner on the screw of the pulley (on the crankshaft)
➥
Or turn the ring gear on the flywheel with a screwdriver
☞
Slowly turn clockwise until fuel is discharged from the opening of injection pump A
Fig. 6: Marks on flywheel
D
C
B
A
E
Fig. 7: Mark before top dead centre
G
F
Fig. 8: Opening on fuel pump
A
Fig. 10: Turning the fuel cocks to flow
B