BA 50Z3/6003 en – Edition 4.3 * 5003b520.fm 5-25
Maintenance
5.10 V-belt
Only check or retighten/replace the V-belt when the engine is stopped –
Risk of injury.
☞ Stop the engine before performing inspection work in the engine compart-
ment.
☞ Disconnect the battery or actuate the battery master switch.
☞ Let the engine cool down.
Cracked and stretched V-belts cause engine damage.
☞ Have the V-belt replaced by an authorized workshop.
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 control lever base.
☞ Remove the ignition key and carry it with you.
☞ Disconnect the battery or actuate the battery master switch.
☞ Let the engine cool down.
☞ Open the engine cover.
☞ Carefully check V-belt 1 for damage, cracks or cuts.
➥ If the V-belt is damaged:
☞ Have the V-belt replaced by authorized personnel.
➥ 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).
☞ Retighten the V-belt if necessary.
☞ Close and lock the engine cover.
Fig. 287: Checking V-belt tension
About 8 mm (0.31 in)
1
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