53.
Check the wear on the rocker shaft. Also check that the Pressure testing the nozzles
tappet adjustment screw’s spherical part is neither deformed 55. Check the shape of the jets at an opening pressure of
2
nor worn. The threads on the screw and the locknut must be 185 kp/cm (2631 p.s.i.). Also check that the fuel spray
undamaged.
discontinues simultaneously at all four holes and that no
Oval rocker arm bushes are to be replaced. Pressing in and subsequent drops appear.
out is performed with drift 884560. Press the bush in so that
the oil hole assumes the position shown in the figure. The
bush is reamed to a light push fit after it has been pressed
in. Lubricate the shaft and assemble the rocker mechanism.
5
4. Fit the rubber seal 1 on the inlet valve. Use tool 884497. Adjustment of opening pressure
Oil the valve sterns before they are inserted in their 56. The opening pressure is adjusted with adjustment
respective valve guides. Afterwards fit the valve springs, washer 1, which is available in thicknesses between 1 mm
collars and collets with the help of a valve compressor.
(0.0394
in.l and 1,95 mm (0.0768 in.) with a difference of
0,05
(0,0020 in) mm between each size. Dismantle the
nozzle and replace the washer with a thinner or thicker
washer depending on whether the pressure is to be reduced
or increased. Assemble the nozzle and check the opening
pressure and jet shape. Continue until a satisfactory result is
obtained.
16
| Categories | Volvo Penta Manuals |
|---|---|
| Tags | Volvo Penta MD5A |
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| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Marine readers have rated Volvo Penta MD5A Marine Diesel Engine Workshop Manual 5.0 out of 5.0 based on 1 product reviews. Very useful download. Thanks VM.