D10R Track-Type Tractor Belts - Inspect/Adjust/Replace Caterpillar

Air Conditioner Belt

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Illustration 1	g00579335

1. Inspect the condition of the compressor drive belt. The belt should deflect 14 to 20 mm (.56 to .81 inch) under 110 N (25 lb) of force. Use a 144-0235 Belt Tensioner Gauge in order to measure the tension.

2. Remove the belt guard.

3. Loosen the compressor mounting bolts and the adjusting bracket bolt.

4. To achieve the correct belt tension, move the compressor inward or move the compressor outward. Tighten the compressor mounting bolts and the adjusting bracket bolt. Recheck the belt adjustment.

5. If necessary, repeat Step 2 to Step 4. Check the cab air filters. If necessary, clean the filter elements.

6. If poor cooling is experienced, turn off the air conditioner. Stop the engine. Consult your Cat dealer for air conditioner system service.

Alternator Belt

1. Open the access door (if equipped) on the left-hand side of the machine.

Note: Even if only one belt is worn or damaged, replace the belts in sets when applicable.

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Illustration 2	g00039315

2. Inspect the condition of the alternator belt. The belt should deflect 14 to 20 mm (.56 to .81 inch) under 110 N (25 lb) of force. Use a 144-0235 Belt Tension Gauge in order to measure the tension.

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Illustration 3	g00039317

3. Loosen the alternator mounting bolts. Loosen the adjusting locknut.

4. Turn the adjusting nut until the correct belt tension is reached. To achieve the correct belt adjustment, move the alternator inward or move the alternator outward, as required.

5. Tighten the adjusting locknut. Tighten the alternator mounting bolts.

6. If new belts are installed, check the belt adjustment again after 30 minutes of engine operation.

7. Close the access door (if equipped).