Install Center Bolt - Volvo D 20 Service Manual

Group 21 Engine
Timing gear behs, replacement
L l 7
Install center bolt
Smear threads and rnating surface with sealer P/N
277961-9.
Use wrench 5187 (rest on cooling fan journal) to hold
vibration damper. LJse wrench 5188 to lorque center
bolt to 350 Nm {255 ft lbs).
lmportantr Torque 350 Nm applies only if wrench 5188
is used. Also torque wrench must be in ine with wrench
5184.
L18
Make sure cyl. 1 is at TDC - inlection
C h e c k ' 0 ' m a | k o n f l y w h e e l a n d a d j u s t i f n e c e s s a r y .
L 1 9
Set belt tension
A d j u s t t e n s i o n b y m o v i n g c o o l a n t p u m p
U s e g a u g e 5 1 9 7 t o c h e c k t e n s i o n . A t t a c h g a u g e t o b e l t
and set to 12.5 units.
S t r e t c h b e l l u n t i l m a r k o n g a u g e p l u n g e r i s i l u s h w i t h
D e p r e s s b e l t s t r o n g l y w i t h h a n d a n d r e c h e c u a d j u s t t e n -
L20
040
Tighten camshaft lront sprocket and remove
gauge 5190
Use 5199 to prevent sprocket from turning.
Torque center boit to 4s Nm (33 fi lbs).
R e m o v e g a u g e 5 1 9 0 a n d f e e l e r g a u g e .
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