Volvo D20 - Page 62

Group 21 Reconditioning engine
Assembly
O " ~
D20
D 24 o'"
60
J4
Install center bolt
Smear threads and mating surlace with sealer PIN
277961-9.
Use wrench 5187 (rest on cool ing fan journal) to hold
vibration damper and wrench 5188 to torque center
bol t to 350 Nm (255 f t Ibs).
Important! Torque 350 Nm (255 f t Ibs) applies on ly if
wrench 5188 is used. Also, torque wrench must be in
line with wrench 5188.
Nate!
Different vibration dampers for D 20 and D 24
engines.
Set bett tension
Adjust tension by moving coolant pump.
J5
Use gauge 5197 to check tension. Attach gauge to belt
and set to 12.5 units. Stretch belt unti l mark on gauge
plunger is flush with sleeve.
Tighten mounting bolts. Depress belt strongly with
hand and recheckladjust tension.
Check that eyl. 1 is at TDC - injeetion
Use tool 5198. Set gauge to 25.0.
J6
Zero mark on flywheel should coincide with zero of
ruler. Adjust if necessary.