4-24 SHB 803 en – Edition 2.4 * 803s410.fm
Engine
4.22 Checking the nozzle jet
☞Remove the injection lines and the injection nozzles.
☞Connect the injection nozzle with the high pressure line of the nozzle tester.
☞Quickly create pressure until the nozzle ejects fuel (ejection 3 – 4 times).
☞Hold a white sheet of paper about 30 cm (12") away from the nozzle and let the nozzle
eject fuel.
☞The nozzle jet must create a shape on the paper as shown below.
4.23 Injection time
Checking injection time
Preparatory work:
• The fuel system must be filled and bled.
• Clean the injection pump and keep it clean.
☞Checking cylinder 1 is basically sufficient and serves the purpose, but all other cylin-
ders can also be checked.
☞Apply current to the cutoff solenoid, or remove the cutoff solenoid and the O-ring from
the injection pump.
➥Fuel supply is enabled.
☞Set the throttle to the maximum speed.
☞Remove the cap on the flywheel housing, see Fig. 27
➥The view to the ring gear is opened.
☞Position a spanner on the screw of the pulley (on the crankshaft) and turn clockwise.
☞Turn until top dead center marks B on the ring gear for cylinder 1 are visible and at the
same level as mark F on the flywheel housing.
➥There are several marks on the ring gear depending on the number of cylinders of
the diesel engine; each individual mark can be used with the corresponding cylinder
for testing purposes.
➥Top dead center can be assigned to the correct cylinder with the number B stamped
next to it.
Normal
-------------------------------------------------Variation-----------------------------------------------
Fig. 27: Flywheel housing cap
Fig. 28: Top dead center mark
F
B
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