V-Belt Engines; V-Belt Tension - Volvo Penta 3.0GLP-C Owner's Manual

Maintenance
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V-Belt Engines

The following engines use two separate V-belts which
may occasionally have to be adjusted for tension:
4.3GL and 5.0GL.
CAUTION! These belts are heavy duty. Do not
replace with automotive belts.
Following is a description of the dual belt system:
A – Alternator Belt (arrow indicates position to be
used for checking belt tension).
B – Circulating Pump Pulley.
C – Crankshaft Pulley.
D – Alternator Pulley.
E – Power Steering Belt (arrow indicates position
to be used for checking belt tension).
F – Power Steering Pump Pulley.

V-Belt Tension

Belt tension is determined by belt deflection.
1. With the engine stopped, the belt should be tight
enough so that it will deflect ¼ inch (6 mm) when
pressed with a finger, or 75 ± 10 pounds (333.6 ±
44.5 N) when using a belt tension gauge.
2. If the belt is too tight, excessive belt and bearing
wear can occur.
3. If it is too loose, slippage can occur, resulting in
belt wear, poor circulating pump, alternator, and
power steering operation.
Belt tension should be checked after 10 hours of serv-
ice and every 5 hours thereafter.
VPA 7743722 English 10-2004