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© Scania Industrial & Marine Engines
14. Every 1,200 hours:
CHECKING INJECTORS
Injectors should be inspected by trained personnel with access to the required
equipment, at least once every year or every 2,400 hours.
Removal
1.
Clean around the injectors and connections including clamps and
brackets.
2.
Undo the leak-off pipes and bunch of delivery pipes. Be careful to
avoid bending any of the delivery pipes.
3.
Unscrew the injector.
4.
Place protective plugs on the injector and delivery pipe.
5.
Lift the seal from the bottom of the injector seat if it does not come out
together with the injector.
6.
Place a seal plug in the injector seat in the cylinder head.
7.
Clean the injectors and check/adjust in an injector tester.
Correct opening pressure, see Technical data, page 52.
Fitting
1.
Check that there is no old seal in place and fit a new seal in the bottom
of the injector seat.
2.
Fit a new O-ring in the socket nut and a new seal under it.
3.
Fit the injector.
4.
Tighten the socket nut to 70 Nm (7.0 kgfm).
5.
Fit the delivery pipe and tighten the cap nuts to 20 Nm (2.0 kgfm).
Fit clamps and brackets.
Take care to fit the delivery pipe without tension and make sure that
the cone on the delivery pipe is correctly positioned in the connection.
6.
Fit the leak-off fuel line. Tighten the bolts to 11 Nm (1.1 kgfm).
1.
Delivery pipes
2.
Cap nut
3.
Washer
4.
Cone
5.
Connection on injector or
injection pump
Delivery pipe connection
1.
Socket nut
2.
O-ring
3.
O-ring
4.
Stop ring
5.
Guide pin
6.
Seal
The delivery pipes must
not be bent.
All clamps must be refitted.
Always wear gloves and eye
protection when testing
injectors.
Fuel escaping under high
pressure can penetrate body
tissue and cause serious injury.
