New Holland Boomer 41, Operator'S Manual

Page: 174 / 216

7 - MAINTENANCE
Engine belts
Fan and alternator belt
The belt- (1) that drives the cooling fan and alternator is
located at the front of the engine.
When
5 kg ( 11 lb ) of pressure is applied midway between
the belt pulleys, a correctly tightened belt will deflect 5 mm
( 0.2 in ) .at point (A) .
If the fan belt is slipping, fan efficiency is lowered, resulting
in the engine running too hot. or the alternator not charging
If the belt is too tight, the life of the alternator bearing will
be shortened. If the fan belt shows signs of cracking or
fraying, install a new one.
NHIL13CT01234AA
1
To adjust fan and alternator belt tension:
1. Loosen the two bolts (2) on the alternator , using a
prybar, pull the alternator away from the engine to
apply tension to belt.
2. When proper belt tension is achieved, tighten the
two alternator bolts.
Air pump belt
The belt (3) that drives the engine air pump is located at
the front of the engine.
When
5 kg ( 11 lb ) of pressure is applied midway between
the belt pulleys, a correctly tightened belt will deflect
10 mm ( 0.4 in ) .at point (B) .
NHIL13CT01234AA
2
To adjust air pump belt tension:
1. Loosen air pump mounting bolt (4) .
2. Rotate adjustment bolt (5) clockwise to tighten or
counterclockwise to loosen the belt tension.
3. When proper belt tension is achieved, tighten air
pump mounting bolt.
NHIL13CT01244AA
3
NOTE: If the air pump belt is slipping, pump efficiency is lowered. Resulting in the (DPF) burning not operating at
a high enough temperature or difficulty in starting burner. If the belt is too tight, the life of the pump bearing will be
shortened. If the fan belt shows signs of cracking or fraying, install a new one.
7-36