5-14 BA 901/1101 en – Edition 2.1 * 91101b520.fm
Maintenance
Checking the V-belt of the air conditioning system (option)
Excessive or insufficient tension of the V-belt can cause damage to the V-belt
or to the compressor of the air conditioning system.
☞ Always ensure that the V-belt has the correct tension!
☞ Replace V-belts with damage, cracks, cuts, etc.!
☞ Avoid contact of oil, grease or similar substances with the V-belt!
• Check as follows:
☞ Stop the engine
☞ Raise the safety bar
☞ Remove the key and carry it with you
☞ Disconnect the battery or the battery master switch
☞ Let the engine cool down
☞ Open the engine cover
☞ Carefully check V-belts 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 authorized personnel
☞ Press with your thumb about 100 N to check the deflection of the V-belt. A new V-belt
should have a deflection of 7 to 9 mm, a used V-belt (after about 5 minutes running
time) should have a deflection of 9 to 11 mm (see 2).
☞ Retighten the V-belt if necessary
Tightening the V-belt of the air conditioning system (option)
• Retighten as follows:
☞ Stop the engine
☞ Raise the safety bar
☞ Remove the key and carry it with you
☞ Disconnect the battery or the battery master switch
☞ Let the engine cool down
☞ Open the engine cover
☞ Loosen fastening screw 3
☞ Loosen lock nut 4 and turn it upward a little
☞ Screw the belt tensioner with nut 5 in the direction of arrow A, until you reach the
correct V-belt tension (fig. 101)
☞ Firmly tighten lock nut 4 again
☞ Tighten fastening screw 3
☞ Check V-belt tension again and adjust it if necessary
☞ Connect the battery or the battery master switch
☞ Close the engine cover
Fig. 100: Checking the V-belt tension of the air conditioning
system
About 8 mm
2
1
Fig. 101: Retightening the V-belt of the air conditioning
system
3
5
4
A
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