Volvo D 20 Service Manual page 69

Group 21 Engine
i-'i
Timing gear belts, replacement
L28
Check pump setting
Turn engine two full turns until cyl. I is at 1op dead
center - injection, again. lf engine is turned too far it
must be turned back approx. 'l14lurn and then to zero
mark otherwise setting will be inconect.
Dial indicator should show:
D 20 ...........................
0.75-0.83 mm = 0.029F0.0327
in
D24........................... 0.65 0.73mm=0.025F0.0287in
D 24 USA,/Canada
1S79 1981 ...........-....
0.6F0.73 mm = 0.0256-0.0282in
1982 .........................
0.82-0.90mm = 0.0323-0.0354in
Correcr reading: Tighten injection mounting bo ts. Pro-
ceed to 129.
Incorrect readingr Readjust according to instructions
Radiusling pump setting:
D 2 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 . 8 0 m
D 24 .................................................
0.70 mm : 0.0276 in
D 24 USA,/Canada
1979-1981 .......................................
0.70mm :0.0276in
1982 ...............................................0.85mm:0.0
Reading less than specified:
Slacken pump mounting bolts and turn pump inwards
to obtain correct valLre- Tighten mounting bo ts and
repeat check of pump settings.
Beading more than specified:
Slacken purnp mounting bolls and turn pump outwards
until dial indicto. shows approx:
D 20 .................................................
0.70 mm = 0.0276 in
D 24 ...........--...-...-....-...-........-.......-..
0.60 mm = 0.0236 in
D 24 USp/Canada 1979-1981 ......... 0.60 mm = 0.0236 in
1 9 8 2 . . . . . . . . . . . . . . . . . 0 . 7 5 m m : 0 . 0 2 9 5
Then turn pump inwards unti specified value is ob
tained. Tighten rnounting bo ts and recheck pump set-
ting.
Note! lnjection pump must not be tapped or knocked as
this will alter its setring.
Bemove dial indicator
plug with new seal
Tightening torque 9 Nm
L29
and holder 5194. Install
{6.5 ft lbs).
6 7