Caterpillar — Belt - Inspect
Maintenance · Belts
From a Caterpillar owner's manual covering: 3126B, 3126B Petroleum Engine, Z2A1-Up. Check it applies to your exact model before use.
Applies to: Caterpillar 3126B
Before you start
- Use of standard belts on this engine may cause an explosion. Only non-static belts should be used.
Procedure
- Remove the belt guard.
- Inspect the condition and adjustment of the alternator and accessory drive belts.
- Apply 110 N (25 lb ft) of force midway between the pulleys.
- The correct deflection is 9 mm (0.35 inch) to 15 mm (0.59 inch).
- To adjust, slightly loosen the mounting bolt and adjusting nut.
- Move the pulley to adjust belt tension.
- Tighten the adjusting nuts and the mounting bolts.
- Install the belt guard.
Specs & values
- Belt tension check force 110 N (25 lb ft)
- Deflection 9 mm (0.35 inch) to 15 mm (0.59 inch)
Full service-parts list: Caterpillar 3126B →
Source: Caterpillar owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.