Replacing The Poly V Belts - Hatz 4H50TIC Operator's Manual

4H50TIC
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8.2.8 Replacing the poly v belts

Safety note
i
HATZ
Activity
Loosen the alternator mounting bolt (1) one or two revolutions.
Position the belt tensioner (3) with the guiding groove on the
bracket (2).
Feed in the hexagon nut (4) of the mounting bolt into the clamp-
ing claw (5). Move the belt tensioner for this.
Adjusting the belt tension with a torque wrench:
Place the torque wrench (with dial gage) on the belt tensioner,
lay the counter support on the alternator housing.
Tighten the torque wrench (6) until the required torque is
reached.
Hold the torque wrench and tighten the alternator mounting bolt
at this position.
Checking the belt tension with a frequency meter:
Vibrate the end of the belt between the alternator and fan by
lightly hitting it with the hand.
Measure the frequency with a commercially available optical or
acoustic frequency meter by following the meter manufacturer's
instructions.
If necessary, retension the belt by using a belt tensioner as de-
scribed above.
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool before maintenance.
NOTICE
▪ The poly v belt must be replaced after 3000 operating hours
at the latest. If wear is detected, the poly v belt must be im-
mediately replaced.
Operator's Manual
Maintenance
69