Overhauling Injectors - Volvo Penta D1-13 Workshop Manual

23-7 Injectors and Delivery Pipes
1 Injector nut
2 Injectors
3 Joining piece
4 Compression screw
5 Spring
6 Adjustment shims
7 Injector holder
8 Washer
9 Nut
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Overhauling injectors

1 Clean the outside of the injector.
2 Fix the injector (holder) in a vise. Unscrew the
injector nut and disassemble the injector.
NOTICE! Be careful that the injector nozzle does
not fall out during disassembly.
3 Pull the injector nozzle out of the injector sleeve
and put the components in white benzene.
NOTICE! Make sure that the injector needles and
injector sleeves which belong with each other,
and fit together, are not mixed up if several injec-
tors are cleaned at the same time. To avoid mix-
ups, the injectors should be put in an injector
stand or in different compartments.
4 Check each injector carefully with an illuminated
magnifier or an injector microscope. Also check
the other components.
5 When installing a new nozzle it is important that
the conserving oil is cleaned off the injector nee-
dle and sleeve before the injector is assembled
(avoid skin contact with the needle's sliding sur-
face).
Clean the components in chemically pure white
benzene. Check that the needle slides in the
sleeve with no tendency to bind.
6 Dip the injector components in pure Diesel or
testing oil, and fit the components together. Use
the original thickness of adjustment washer(s) to
set the opening pressure.
7 Check the opening pressure, jet pattern and seal-
ing in an injector tester.
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