Volvo MD5A, Workshop Manual

Page: 19 / 38

Flywheel cover and hand starting mechanism
57. Unscrew nut 1 and remove it and washer 2 holding the
hand starting gearwheel 3. Then remove the gearwheel from
the shaft A. Knock the shaft out from the cover. Loosen the
set screw 5 which holds the spacer washer and knock out the
spacer washer when the bearings 7 has been removed.
Remove key 8, slide off the spacer ring 9 and pull off ball
bearing 10 after which seal 11 can be pulled off. Note! If only
the seal 11 is to be changed, pin 12 can be knocked out, after
which the seal can be removed.
58. Replace damaged parts and reassemble the pin, seal,
ball bearing and spacer ring on the shaft. Fit the spacer
washer into the cover and tighten it in position with the set
screw. Note! Ensure that the spacer washer’s groove faces
the locking screw’s centre. Fit the shaft in the cover. Place the
key in position and then the ball bearing. Fit the gearwheel.
Secure it with a washer and nut. Knock out seal 1 from the
flywheel cover. Press in a new seal afterwards.
Camshaft
59.
In such cases (on engines with engine nos. 100-1075)
where a camshaft gear change is necessary, the camshaft
must be changed as well. A new camshaft gear cannot be
fitted to an early type of camshaft. Furthermore this means
that the transmission cover must be machined since the
new camshaft gear is thicker than the earlier gear and
consequently there is not enough space for it in the
transmission cover. The axial guide face distance A must be
filed down by 3mm (0,1181 in.).
If the camshaft is damaged this means that the camshaft
gear must be replaced in this case as well. This also means
that the axial guide face must be filed down by 3 mm
(0,1181 in.).
60.
If the transmission cover is damaged and must be
replaced, this means that even the camshaft and the
camshaft gear must be replaced. The replacement is
necessary because the axial guide in the new transmission
cover is shortened by 3 mm (0,1181 in.) which in turn
means that the camshaft will have an axial play of 3 mm
(0,1181 in.).
The camshaft, camshaft gear and transmission cover are
interchangable as of engine no. 1076 inclusive. When
changing camshaft gears of a later type, the camshaft shall
be pressed out of the camshaft gear.
Take care of the key. Check the camshaft for wear. See the
technical data.
Place the key in the camshaft and press on the camshaft
gear. The distance from the camshaft end to the camshaft
gear’s hub must be 136 mm (5,354 in.). See fig.
17