Volvo Penta 120S, Руководство по ремонту

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59
Repair of MS2V reverse gear, angle gear
33. Remove the pinion and check whether the marking
pattern on the pinion corresponds with illustration A ,
which is correct.
The pattern should be located at the centre of the
tooth, in height, but displaced towards the narrower
end.
34. If the marking pattern is similar to B , move the
crown wheel down.
NOTE ! To retain the pre-load on the tubular shaft, the
thickness of shims between the cover and the gear-
box housing must be reduced to the same extent.
If the flank clearance is too small after this operation,
move the pinion upwards by increasing the thickness
of the shims between the gearbox housing and the
pinion.
35. If the marking pattern is similar to C , move the
crown wheel and pinion in the opposite directions to
what was specified in the previous item.
When the correct flank clearance and marking pattern
has been obtained, wash off all marker dye from the
crown wheel and pinion.
B
C
A
31. Install the pinion in the gearbox housing, without
an O-ring and with a total shim thickness of 0.35 mm
between the pinion and the gearbox housing.
Install two of the socket cap screws, diagonally op-
posed. Torque to
9 Nm (6.64 lbf ft).
Check the flank clearance on the nut, as in the illus-
tration. Use dial gauge
9999701 and a stand.
Flank clearance : 0.10-0.25 mm (0.004-0.010")
Adjust the flank clearance if necessary, by adding or
removing shims from between the pinion and the gear-
box housing.
32. Remove the pinion and apply a thin layer of mark-
er dye to the crown wheel and pinion.
Install the pinion again and turn it round in both direc-
tions. Brake the tubular shaft at the same time.
9999701
Flank clearance,
checking