Dayco Automatic Belt Tensioner Caterpillar 24M Grader 385C Excavator Track 621F

Dayco No Slack Automatic Belt Tensioner

Designed to maintain constant tension on serpentine belt drives
Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories.

To maintain the proper tension throughout the drive, an automatic, spring-loaded tensioner is incorporated into the drive system geometry.

Dayco’s Automatic Belt Tensioner features a patented “flat spring” design that’s engineered to provide less operating range variations in tension.

This reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed.

It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A Teflon strip wound within the spring resists abrasion.

The flat spring itself is coated to resist rust.

Other superior design features include a steel locator pin (where the application demands).

A heavy-duty cast aluminium spring case resists cracking and fatigue. The heavy-duty cast aluminium arm offers additional strength and less distortion.

An aluminium retainer ring locks the spring case and arm together, and seals against corrosion.

A steel pivot tube (where the application demands) provides additional strength for critical torque requirements.

A thermoplastic rubber “spring slot plug” keeps out harmful contaminants. The lubricated nylon “pivot tube bushing” and “spring bushing” promote quieter performance.

A rubber “O” ring seals against dust and grime.

The zinc coated mounting bolt resists rust, and is concentric for a more even degree of constant tension.

In order to meet OEM performance standards, Dayco Automatic Tensioners come with either a glass-filled polymer (plastic) or steel pulley, that features a dust cover to protect against contaminants.

Fits the following Make, Model, Series:

Caterpillar > 24M Grader > 1999 - , 18.1L, 6 cyl, 12V, OHV, DI, Diesel, EngCode: C18

Caterpillar > 385C Excavator (Track) > 2011 - , 18.1L, 6 cyl, 12V, OHV, DI, Diesel, 395kW, EngCode: C18, Track

Caterpillar > 621F Scraper > 1900 - , 14.6L, 6 cyl, 12V, OHV, Di, Diesel, 246kW, EngCode: 3406CTA, 4X4

Caterpillar > 623F Scraper > 1900 - , 14.6L, 6 cyl, 12V, OHV, DI, Diesel, 272kW, EngCode: 3406CTA, 4X4

Caterpillar > 623G Scraper > 2001 - 2010, 15.2L, 6 cyl, 12V, OHV, DI, Diesel, 294kW, EngCode: C15, 4X4

Caterpillar > 631K Scraper > 2015 - , 18.1L, 6 cyl, 12V, OHV, DI, Diesel, 425kW, EngCode: C18, 4X4

Caterpillar > 637K Scraper > 2015 - , 18.1L, 6 cyl, 12V, OHV, DI, Diesel, 425kW, EngCode: C18, 4X4

Caterpillar > 735 Articulated Dump Truck > 2001 - , 15.2L, 6 cyl, 12V, OHV, DI, Turbo, Diesel, 308kW, EngCode: C15, 6X6

Caterpillar > 740 Articulated Dump Truck > 1991 - , 15.2L, 6 cyl, 12V, OHV, DI, Turbo, Diesel, 346kW, EngCode: CT15, 6X6

Caterpillar > 740B Articulated Dump Truck > 2010 - , 15.2L, 6 cyl, 12V, OHV, DI, Turbo, Diesel, 367kW, EngCode: C15

Caterpillar > 745C Articulated Dump Truck > 2015 - , 18.1L, 6 cyl, 12V, OHV, DI, Turbo, Diesel, 381kW, EngCode: C18

Caterpillar > 825H Compactor > 2006 - 2014, 15.0L, 6 cyl, 12V, OHV, DI, Diesel, 299kW, EngCode: C15

Caterpillar > 825K Compactor > 2013 - , 15.0L, 6 cyl, 12V, OHV, DI, Diesel, 324kW, EngCode: C15

Caterpillar > 826K Compactor > 2013 - , 15.0L, 6 cyl, 12V, OHV, DI, Diesel, 324kW, EngCode: C15

Caterpillar > 980H Loader > 2013 - , 15.2L, 6 cyl, 12V, OHV, DI, Diesel, 237kW, EngCode: C15

Caterpillar > 988H Loader > 2006 - , 18.1L, 6 cyl, 12V, OHV, DI, Diesel, 373kW, EngCode: C18

Caterpillar > CT360 > 2010 - , 15.2L, 6 cyl, 12V, OHV, DI, Diesel, 410kW, EngCode: C15 Acert

Caterpillar > CT630 > 2010 - 2015, 14.8L, 6 cyl, 12V, OHV, DI, Turbo, Diesel, EngCode: CAT C15

Caterpillar > D8T Crawler Tractor ( Track ) > 2006 - , 15.2L, 6 cyl, 12V, OHV, DI, Diesel, 259kW, EngCode: C15

Caterpillar > RM500 Rotary Mixer > 2007 - , 15.2L, 6 cyl, 12V, OHV, DI, Diesel, 403kW, EngCode: C15