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MAINTENANCE
4.10.1 AIR CONDITIONING COMPRESSOR - CHECK DRIVE BELT TENSION
Be sure to set the maintenance safety switch to 0 position
before to start the checking procedure. Refer to page 205 for
the location of the maintenance safety switch. In the 0 posi-
tion the engines can not be started. Secure this position by
inserting a padlock into the holes of the switch. Up to three
padlocks can be attached to the holes provided.
Legend for illustration Z 22511
(1)
Refrigerant compressor
(2)
Electromagnetic clutch
(3)
Compressor carrier
(4)
Swivel bracket
(5)
Pivot bolt, loosen for adjusting belt tension
(6)
Drive belts
(7)
Lock nut
(8)
Adjusting bolt for belt tension
Check tension of each belt
The tension is correct if the belt can be depressed with 110 N
(25 lb.) force approximately 15 to 20 mm midway between the belt
pulleys.
Excessive belt tension causes undue wear on the bearings. After
a new belt has been in use for approximately 20 minutes, check
the tension and adjust again if necessary.
NOTICE
Always replace the belts in complete sets.
Adjust belt tension
1. Loosen pivot bolt (5)
2. Loosen lock nut (7)
3. Turn adjusting bolt (8) until correct belt deflection is obtained.
Tighten lock nut (7)
4. Tighten pivot bolt (5) and check the belt adjustment.
WARNING
4.10 EVERY 250 OPERATING HOURS OR MONTHLY
379
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