Check Engine Fan Belt Tension - Doosan DX700LC Operation And Maintenance Manual

Check Engine Fan Belt Tension

IMPORTANT
A loose fan belt can cause engine overheating, poor
charging, and/or premature belt wear. A belt that is too tight
can cause damage to the water pump, alternator bearing or
belt.
1. Inspect every 250 hours. (Inspect after first 50 hours of
operation.)
2. With the engine shut off, check the tension of the fan belt
by pressing downwards on the belt, midway between the
fan pulley and alternator pulley. The belt should flex
approximately 6 - 8 mm (0.24 - 0.31 in). See Figure 44. To
adjust the belt, loosen the alternator adjustment plate bolts,
adjust the belt tension and retighten the bolts.
Inspection, Maintenance and Adjustment
4-30
Water
Pump
CRS
Pulley
Water
Pump
CRS
6 - 8 mm (0.24 - 0.31 in)/
Pulley
10 kg (22 Ib)
Figure 44
Alternator
Idle Pulley
Compressor
Alternator
FG016161
OP001123