Volvo D20 - Page 69

Group 21 Reconditioning engine
fnstafling parts
Then tum pump gear back slightly until min reading
registers on
dial indicator. Set indicator to zero.
Tum pump gear clockwise until mark on gear and
pump mounting braeket coincide. lock gear in this
position with stop 5193. (Insert stop through pump
gear into mounting braeket.)
KB
Install camshaft rear spracket and timing belt
Tighten center bolt by hand, it should be possible to
tum sprocket on camshaft.
K9
Set belt tension
Adjust tension by moving injection pump.
Use gauge 5197 to check tension. Attach gauge to belt
and set to 12.5 units. Stretch bel t until mark on gauge
plunger is flush with sleeve.
Tighten mounting bolts. Depress belt strongly with
hand and rechec kladjust tension.
Altitude adjustment USA onlV (Vehicles up to 1983)
legal requirement
Environmental Protection Agency (EPA) defines:
- high
altitude as an elevation exceeding 1219 metres
(4000
f t)
New vehicJes sold for principal use at high altitudes
must be adjusted before being delivered to the
customer. After adjustement a decal must be affixed to
the
firewali (beside the emissions information decal)
and also to the injection pump.
The foliowing adjustment must be made to vehicJe for
use at high altitudes:
Injection timing: advanced 0.07 mm (0.0028 in) for
every 1000 m (3300 ft l increase in altitude.
Injected quantity decreased by 2.3 mm
J
for each 1000
metre increase
in altitude. This is equivalenttotuming
adjustment screw 35° anticlockwise .
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