Incorrect Belt Tension; If Gear Tension Has Been Adjusted - Volvo D 20 Service Manual

Group 21 Engine
Timing gear belts, tension
Incorrect belt tension
lJnscrew expansion tank cap to release overpressure
from cooling syslem.
Tum engine approx. 1/4 turn anticlockwise to obtain
slack part of bslt on driving side. lf this is not done
injection pump setting will be incorrect.
Turn crankshaft with 27 mm socket or 5188.
Adjust belt tension to 12.5 units on gauge 5197 by
moving coolant pump mounting bracket.
lf gear belt tension has been adiusled
Turn engine at le6st one turn clockwise and check that
belttension is 12-13 units on tool5197. Adjust if neces-
saryaccording to operations K2-3 and rechecktension,
Install timing gear covers
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