BA 50Z3/6003 en – Edition 4.3 * 5003b520.fm 5-27
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 the V-belt once a day, and retighten it if necessary.
Retighten new V-belts after about 15 minutes of running time.
☞ 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 pulley and the crankshaft disc.
A new V-belt should have a deflection of 7 to 9 mm (0.27 to 0.35 in), a used V-belt (after
about 5 minutes running time) should have a deflection of 9 to 11 mm (0.35 to 0.43 in).
☞ Retighten the V-belt if necessary.
☞ Connect the battery or the battery master switch.
☞ Close and lock the engine cover.
Tightening the V-belt of the air conditioning system
☞ 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.
☞ Slacken fastening screw 3 of spacer washer 4.
☞ Press the belt tensioner in the direction of arrow A until reaching the correct V-belt ten-
sion (Fig. 290).
☞ Keep the belt tensioner in this position, and at the same time retighten fastening screw
3.
☞ Check V-belt tension again and adjust it if necessary.
☞ Connect the battery or the battery master switch.
☞ Close and lock the engine cover.
Fig. 289: Checking the V-belt tension of the air conditioning
About 9 mm (0.35 in)
1
Fig. 290: Retightening the V-belt of the air conditioning sys-
tem
4
A
3
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