2003-10:1 © Scania Industrial & Marine Engines 41
14. Every 2400 hours:
CHECKING THE INJECTORS
Injectors should be inspected by trained personnel with access to the
necessary equipment. Inspection should be carried out at least once a year or
every 2400 hours.
Removal
1. Clean round the injectors and connections, including clamps and
brackets.
2. Detach the delivery pipe bundle and leak-off fuel lines.
3. Unscrew the injector.
4. Fit protective plugs on the injector and delivery pipe.
5. Lift up the sealing washer from the bottom of the injector seat if it does
not come out together with the injector.
6. Fit a core plug in the injector seat in the cylinder head.
7. Clean the injectors and check/adjust a nozzle tester.
Correct opening pressure, see Technical data, page 54.
Fitting
1. Check that there is no old sealing washer in place and fit a new sealing
washer in the bottom of the injector seat.
2. Fit a new O-ring in the threaded socket nut and a new sealing ring under
the socket nut.
3. Fit the injector.
4. Tighten the socket nut to 70 Nm (7.0 kpm).
5. Fit the delivery pipe and tighten the cap nuts to 20 Nm (2.0 kpm). Fit
clamps and brackets.
Take care to fit the delivery pipe without tension and make sure that
the cone on it is correctly positioned in the connection.
6. Fit the leak-off fuel line. Tighten the bolts to 11 Nm (1.1 kpm).
1. Threaded
socket nut
2. O-ring
3. O-ring
4. Stop ring
5. Guide pin
6. Sealing washer
1. Delivery pipe
2. Cap nut
3. Washer
4. Cone
5. Connection on injector or
injection pump
The delivery pipes must not be
bent.
All clamps must be refitted.
Also wear protective goggles
when testing injectors.
A jet from the injector can
penetrate tissue and cause
serious injury.
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