Operation and maintenance manual

Inspection, Maintenance and Adjustment

4-33

DX140R/DX140LCR

Check Engine Fan Belt Tension

1. Inspect every 250 hours. (Inspect after first 50 hours of

operation.)

2. With the engine shut off, check the ten

sion of the fan belt

by pressing downwards on the belt, midway between the

fan pulley and alternator pulley. The belt should flex

approximately 10 mm (0.4 in). See Figure 49. To adjust the

belt, loosen the alternator adjustmen

plate bolts, adjust the

belt tension and retighten the bolts.

FG015021

Idle Pulley

Alternator

Crankshaft

Compressor

Figure 49

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.