Volvo Penta TD520GE Workshop Manual page 108

Repairing components
118
2. When cleaning the front cover remove the oil
pump and reduction valve first.
3. Press down the compression spring and remove
the retaining washer. Remove the spring and
valve for inspection. Also inspect the valve seat
in the housing.
NOTE! Be careful, as the spring load of this valve is
very high. A good quality spring compressor is re-
quired.
4. Take out the gear assembly and check for abnor-
mal wear. Fit a new gear assembly if necessary
and oil lightly.
Tighten the screws to: ............................ 8-9 Nm
(6-6.6 lb.)
Fitting
5. Insert the reduction valve and spring.
6. Press down the compression spring and insert the
spring retaining washer.
NOTE! Make sure the retaining washer is firmly in
place.
Lubricate with a thin coating of oil before fitting.
7. Insert the crankshaft seal using fitting tool
999 8673 and 999 2000.
WARNING! Make sure the correct oilpump is
used for the engine in question. The pumps are
different between the 520 and the 720/721/722
engines.
See "Parts catalogue".
Group 22