FUEL
INJECTOR NOZZLES
A
WARNING
Diesel fuel
or
hydraulic
fluid
under pressure
can penetrate skin
or
eyes, causing serious
injury
or
death. Fluid leaks under pressure may
not
be
visible. Use a piece
of
cardboard
or
wood
to
find leaks. Do
not
use
your
bare hand. Wear
safety goggles.
If fluid enters skin
or
eyes, get
immediate medical attention from a physician
familiar
with
this
injury.
W-2072-0496
Some problems caused by faulty injector nozzles:
The engine is hard to start or
will not start. Rough engine
operation and idle. The engine
will not have full power.
The engine exhaust smoke
is
black, white or blue.
Removal And Installation
The tool listed will be needed to do the following
procedure:
MEL
1181
- Nozzle Wrench
IMPORTANT
Do
not bend the high pressure fuel injection
tubes when removing
or
installing them.
1-2029-0289
Disconnect the high pressure fuel lines at the fuel injector
[A].
Disconnect the high pressure fuel lines at the injection
pump
[8].
Remove the high pressure lines [C].
Disconnect the low pressure hoses
(Item 1)
[0]
at the
injectors.
Use the special tool and remove the fuel injector from the
cylinder head.
Installation: Tighten the delivery valve nuts (Item 1)
[B]
to 29-36 ft.-Ibs. (39-49
Nm)
torque.
Tighten the nozzle holder to
22-36
ft.-Ibs. (30-29 Nm)
in
the
cylinder head.
Revised Jan. 92
-7c--6-
741, 742, 743, 7430S Bobcat Loader
Service Manual
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