Compression Test - Volvo D 20 Service Manual

Group 21 Engine
A. Compression test
Special tool:5191
Compression test
A 1
Disconnect wire lrom stop valve on injection
pump
T h i s s t o p s f l o w o f f u e a n d p r e v e n r s t ] n n e c e s s a r y s p i | -
a s e .
Remove vacuum pump and pump plunger
A3
Disconnect fuel detivery pipes
C e a n a l l c o n n e c r i o n s c a r e f u y b e f o r e d i s c o n n e c r i n g
D i s c o n f e c i p i p e s a n d p l u g a l l c o n n e d i o n s r o p r e v e n r
d i r i f r o n r e n t e r l n g s y s t e m .
A2
1 1