New 9L6724 Belt Set(2) Replacement suitable for Caterpillar

The 9L6724 belt set includes two belts used to drive ancillary components such as alternators or pumps on heavy equipment engines. By maintaining proper belt tension and engagement, it helps support accessory functions and overall engine performance.

Here’s a general guide for proper installation:

1. Turn off the engine and relieve any system loads before starting work.
2. Locate the belt routing diagram, usually on the engine or in your service manual.
3. Loosen the tensioner to relieve belt tension and remove the old belts.
4. Position the new belts along the pulleys following the correct routing path.
5. Adjust the tensioner to ensure proper belt tension.
6. Start the engine and observe belt operation to confirm proper fit and alignment.

The 9L6724 belt set fits multiple heavy equipment engine models, including 3406, 3406C, 3406E, 3408, C-15, C-16, C32, 3412, 3412E, and others where these belts are specified for accessory drive applications. Always verify fitment using your machine’s part references or service manual before ordering. Please reach out to Propel Parts for help verifying fitment.

Yes, this belt set is engineered to meet or exceed OEM specifications for durability, strength, and reliability. When replacing accessory drive belts, choose genuine or high-quality aftermarket parts that meet or exceed OEM expectations to help ensure consistent performance and long service life.

Belts should be inspected regularly during routine maintenance checks, especially in high-temperature or heavy-load environments. Look for cracking, fraying, glazing, or looseness. Replace the belt set if any of these signs appear to avoid slippage or failure during operation.

Typical indicators include:

1. Squealing or chirping noises from the belt area
2. Visible cracking, fraying, or glazing on the belt surface
3. xBelt slipping or reduced accessory performance
4. Uneven wear or loss of tension

Identifying these signs early helps prevent breakdowns and supports reliable system performance.

A quality belt set helps maintain proper drive of accessory components, which supports alternator output, cooling systems, and other vital functions. Using genuine or high-quality aftermarket parts that meet or exceed OEM expectations helps reduce the risk of belt failure, improves reliability, and contributes to long-term equipment performance.