- Caterpillar Products: All
- 3500B Engines
Description of Change: The sleeve bearing in the rocker arm on 3500B Engines has changed.
Adaptable To: The 123-4271 Sleeve Bearing has been cancelled and replaced by the new 230-2620 Sleeve Bearing .
The inside diameter of the new 230-2620 Sleeve Bearing is different from the inside diameter of the former 123-4271 Sleeve Bearing. Refer to Illustrations 1 and 2.
Both the rocker arm assembly and the sleeve bearing are serviceable. The rocker arm assembly is machined to the correct dimension. If the sleeve bearing is purchased separately, the sleeve bearing must be pressed into the rocker arm and machined to the correct dimension.
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| Illustration 1 | g01146259 |
Former rocker arm and sleeve bearing (1) 196-4793 Rocker Arm (assembly, injector) (1) 154-6388 Rocker Arm (assembly, valve) (2) 123-4271 Sleeve Bearing | |
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| Illustration 2 | g01146266 |
New rocker arm and sleeve bearing (3) 230-2622 Rocker Arm (assembly, injector) (3) 230-2621 Rocker Arm (assembly, valve) (4) 230-2620 Sleeve Bearing | |
The changes are adaptable to all 3500B Engines.