OM 803 us – Edition 3.7 * 803b520.fm
5-15
Maintenance
5.6 V-belt
Warning!
WARNING
Injury hazard when checking the V-belt tension!
Can cause serious injury or death.
•
Stop the engine before performing inspection work in the engine compartment
•
Raise the lock lever
•
Remove the starting key
•
Disconnect the battery
•
Let the engine cool down
NOTICE
Cracked and stretched V-belts cause engine damage
•
Have the V-belt replaced by a Wacker Neuson service center
Check the V-belt once a day, and retighten it if necessary.
Retighten new V-belts after about 15 minutes of running time.
Checking V-belt tension
☞
Stop the engine
☞
Raise the lock lever
☞
Remove the starting key and carry it with you
☞
Disconnect the battery
☞
Let the engine cool down
☞
Open the engine cover
☞
Carefully check V-belt
1
for damage, cracks or cuts
➥
Replace the V-belt if it touches the base of the V-belt groove or if the pulleys are
damaged.
☞
Press with your thumb about 100 N (22.5 lbf) to check the deflection of the V-belt
between the crankshaft disc and the fan wheel. A new V-belt should have a deflection
of 6 to 8 mm (0.24 to 0.31 in), a used V-belt (after about 5 minutes running time)
should have a deflection of 7 to 9 mm (0.27 to 0.35 in) (see figure)
☞
Retighten the V-belt if necessary
• If the V-belt is damaged:
☞
Have the V-belt replaced by authorized personnel
☞
Close and lock the engine cover
Retightening the V-belt
May only be performed by a Wacker Neuson service center.
Fig. 203: Checking V-belt tension
About 8 mm
1
2
