A New Belt Tensioner Is Used on Certain 785C Off-Highway Truck Engines {1357, 1358, 1397}
- Off-Highway Truck:
- 785C (S/N: APX1-UP)
Description of Change: The new belt tensioner has a bracket that is different than the previously used tensioner. The new bracket helps to avoid interference with the fan drive belts. Because of the new bracket, a different spring is used.
Adaptable To:
The new belt tensioner is only adaptable to trucks with the 4Z-7110 Conversion Ar .
The new belt tensioner, bracket, and spring are identified in Illustration1.
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 | |
| Illustration 1 | g03228257 |
398-7539 Belt Tensioner Gp (1) 398-3110 Bracket (2) 376-6589 Spring | |
The new belt tensioner, bracket, and spring along with the original belt tensioner and parts are listed in Table 1. The original tensioner is not canceled.
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| Parts on the New 398-7539 Belt Tensioner Gp | Parts on the Original 172-0190 Belt Tensioner Gp |
| 398-3110 Bracket | 235-0279 Bracket As |
| 376-6589 Spring | 344-6306 Spring |
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