Volvo D 20 Service Manual page 93

Group 21 Engine
Set belt tension
Adiust tenslon by rnoving PumP
Use gauge 5197 to check tension Atlach gauge to belt
and set to 12.5 units. Stretch belt until mark on gauge
plunger is flush with sleeve
Depress belt strongly with hand and recheck/adjust ten-
Install camshaft rear sprocket and belt
T i g h t e n c e n t e r b o l t b y h a n d , i t s h o u l d b e p o s s i b l e t o
turn sprocket on camshaft.
P 1 5
Set pump and tighten camshaft rear sprocket
U s e 5 1 9 9 t o h o l d s p r o c k e t . T o r q u e w r e n c h s h o u l d b e a t
r i g h t a n g l e s t o w r e n c h 5 2 0 1 o t h e r w i s e t o r q u e w i l l b e
Using 5199, turn spfocket slowly until
D 20 .................................................
0.80mm : 0.0315 in
D 24 .................................................
0.70 mm = 0.0276 in
D 24USp,/Canada
1979 1981 ......... 0.70 mm : 0 0276 in
1982-.................
0.85 mm : 0.0335 in
Hold sprocket in this position and torque to 100 Nm
(73ft lbs). Take carethat camshaftand sprocketdo not
Camshaft rear seal, replacement
Remove stop 5193 from pump gear