Perkins 5006A-E23TA Operation And Maintenance Manual page 58

58
Maintenance Section
Belts - Inspect/Adjust/Replace
2. Visually inspect fan guards for wear or damage.
Repair as necessary. Remove the fan guards (1).
3. Inspect the belts for cracks, splits, glazing, grease,
displacement of the cord and evidence of fluid
contamination. If necessary, replace the belts,
refer to "Replace" for more information.
Adjust
1. Ensure that the electrical supply to the engine is
isolated.
2. Using a suitable belt tensioning tool, check the
tension of the fan belts. the belt tension should be
checked in the middle point between the two
pulleys.
• New belt tension should be set to 49 N (11. lb)
• Belt tension range should be from 31 N to 49 N
(6.9 lb to 11 lb)
• Belt deflection should be 4.2 mm (0.165 inch)
Illustration 43
3. Each belt must be checked.
4. Loosen nuts (4) on fan adjuster plate (5). Loosen
lock nut (3).
5. Turning bolt (2) counter-clockwise will adjust fan
pulley (6) and loosen the fan belts (7).
6. Turning bolt (2) clockwise will adjust fan pulley (6)
and tighten the fan belts (7).
7. When the fan belts (7) are at the required tension,
tighten nuts (4) to a torque of 85 N·m (62 lb ft).
Then, tighten nut (3) securely.
M0122761
g06619955