179ASC110 / ASC130 / ASC150
MAINTENANCE MANUAL
Maintenance - As Needed Maintenance - As Needed
High-pressure manifold and injectors venting:
• In the event that you performed the above-mentioned
operations and the engine did not start up, vent the
high-pressure manifold. Loosen the nuts on the injec-
tors and turn the engine with starter. Perform venting
until the engine running is regular. Tighten the loos-
ened joints applying the tightening torque of 38 Nm
(28 ft-lb).
! NOTE !
If you are performing venting by turning the motor
with starter, do not turn it longer than 30 s.
Between starting-up wait 2 minutes. During the
venting, the engine could start-up, therefore,
observe the safety precautions.
Fuel pressure in the high-pressure ma-
nifold is high and may cause skin and
other serious injury.
Venting must not be performed on the
hot engine as fuel may flow on the hot
exhaust manifold and cause fire.
Do not smoke when working on the fuel
feed system.
Contain leaking fuel.
• Irregular running of the engine may be caused by
suspended opened injector causing blowing exhaust
fumes back to the pump. Loosen the high-pressure
mains to the injectors on the injection pumps, turn the
motor, and monitor the manifold. If the exhaust fumes
are blown through the manifold back, the injector
hangs and it is opened. In this case, contact dealer or
Cummins service department for the injector replace-
ment.
! NOTE !
For the high-pressure manifold loosening on the
injection pump, use two spanners. Hold the dischar-
ge valve with one and loosen the manifold with the
other.
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