N14 Base Engine Troubleshooting and Repair Manual – 008-003   Drive Belt, Water Pump

Remove the fan drive belts. Refer to Procedure

008-002-002.

Loosen the idler pulley shaft lock nut.

Turn the adjusting screw

counterclockwise
to release tension, and remove the water pump belt.

Visually inspect the idler and the water pump pulleys for cracks or broken grooves. Replace if necessary. Refer to Procedure

008-064-007.

Visually inspect and replace the belt for the following characteristics:

• Cracks.
• Glazing.
• Tears or cuts.

Visually inspect the pulley alignment. Pulley misalignment

must not
exceed 0.5 mm per cm [0.0625-inch per foot] of distance between the pulley centers.

Replace the idler pulley or the water pump if they are

not
in alignment. Refer to Procedures

008-064 and

008-062, respectively.

Install a new belt onto the pulleys.

Turn the adjusting screw to adjust belt tension.

NOTE: Belt tension can increase when the lock nut is tightened. Do

not
adjust belt tension to full value with the adjusting screw.

Use Part No. ST-1293 (Burroughs) or 3822525 (Click-Type) Belt Tension Gauge to measure six-rib belt tension.

* A belt is considered used if it has been in operation for 10 minutes or longer.

* If used belt tension is below the minimum, tighten to the maximum value.

Tighten the idler pulley shaft lock nut.

Loosen the adjusting screw 1/2-turn to prevent breakage.

Measure the belt tension again. Adjust if necessary.