Operator`s manual

Maintenance RD 27
wc_tx000426gb.fm 64
5.16 Inspecting and Adjusting Belts
See Graphic: wc_gr002583
The machine is equipped with a belt that operates the fan, the
alternator, and the water pump. It is also equipped with a second belt
that operates the vibratory pump. For maximum engine performance
and maximum utilization of the engine, inspect the belts for wear and
cracking. Check the tension of the belts. Adjust the tension of the belts
in order to minimize belt slippage. Belt slippage will decrease the belt
life. Belt slippage will also cause poor performance. Improper
tightening of belts will generate an increase in noise level.
Alternator and Water Pump Belt
5.16.1 Open the engine compartment.
5.16.2 To check belt tension, apply 110N (25 lbs.) of force midway between
the pulleys. A correctly adjusted belt will deflect 13 to 19 mm (1/2 to 3/
4 inch).
5.16.3 In order to adjust the alternator belt(a), loosen the mounting nuts (b
and c).
5.16.4 To achieve the correct adjustment, move the alternator inward or move
the alternator outward, as required.
5.16.5 TIghten mounting bolts (b and c).
Note: The alternator shaft nut must be tightened to a torque of
50±5Nm (37±4 ft.lbs.).
5.16.6 When new belts are installed, recheck the belt adjustment after 30
minutes of operation.
Vibratory belts
5.16.7 Open the engine compartment.
5.16.8 To check belt tension, apply 430±20N (97±5 lbs.) of force midway
between the pulleys. A correctly adjusted belt will deflect 5 to 6 mm
(0.2 to 0.24 inch).
5.16.9 In order to adjust the vibratory pump belts (d), loosen the three
mounting bolts (e).
5.16.10 In order to tighten the belts, turn the adjusting screw (f) clockwise. In
order to loosen the belts, turn the adjusting bolt counterclockwise.
5.16.11 Tighten the three mounting bolts (e).
5.16.12 Close the engine compartment.