5-14 BA 3001 En – Edition 2.0 * * 345001b520.fm
Maintenance
5.6 V-belt
Only check or retighten/replace the V-belt when the engine is switched off –
Danger of personal injury!
☞ Switch off the engine before carrying out inspection work in the engine
compartment!
☞ Disconnect the battery
☞ Let the engine cool down
Cracked and stretched V-belts cause engine damage
☞ Have the V-belt replaced by an authorised workshop
Check the V-belt once a day or every 10 service hours, and retighten if necessary!
Retighten new V-belts after about 15 minutes of running time.
Checking V-belt tension
• Check as follows:
☞ Switch off the engine
☞ Remove the 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 the discs of the pulley
• If the V-belt is damaged:
☞ Have the V-belt replaced by authorised staff
☞ Press with your thumb about 100 N 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, a used V-belt (after about 5 minutes running time) should have a
deflection of 7 to 9 mm.
☞ Retighten the V-belt if necessary
Fig. 33: Checking V-belt tension
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