Maintenance
SY50U Excavator OMM
5-30
Operation and Maintenance Manual — 0120
SANY
Check and Adjust the Fan Belt Tension
1. Prepare the machine for service. See “Maintenance
2. Check the fan belt tension:
•
Use a tensioning gauge to check the tension of
the fan belt. The fan belt should be tightened to
22 lbf. (98 N).
•
Check the fan belt tension by pressing down
on the fan belt between the fan pulley (1) and
the alternator pulley (2). The fan belt must
deflect (3) 0.28 in.–0.39 in. (7 mm–10 mm).
3. Adjust the belt if it is outside of specification. Loosen
the adjusting plate fastener (5), alternator bracket
fastener (6), and tension adjuster locknut (7).
4. Turn the tension adjuster (4) to achieve the specified
belt tension.
5. Tighten the adjusting plate fastener, alternator bracket
fastener, and tension adjuster locknut.
6. Check the fan belt tension to confirm correct
adjustment.
Replace the Fan Belt
Visually inspect the condition of the belt. Fan belts that have been exposed to oil or engine coolant, or show signs
of damage or wear, must be replaced.
Replacing the fan belt requires special tools. Contact a SANY dealer for additional information.
NOTICE!
•
A loose fan belt may cause improper battery charging, engine overheating, or accelerated
fan belt wear.
•
An overtightened fan belt may cause damage to the belt, the bearings in the alternator, and
the engine water pump.
Fig. 5-18
0003092
3
2
1
Fig. 5-19
0003079
5
4
7
6