MAINTENANCE 4.10 EVERY 250 OPERATING HOURS OR MONTHLY 4.10.1 AIR CONDITIONING COMPRESSOR - CHECK DRIVE BELT TENSION 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. 347