MA3H – Cummins 3871638 is a genuine OEM rectangular seal ring used as the upper seal ring in Jacobs engine brake assemblies. Cummins/Jacobs service literature for the 411 / 411C / 411D brake models identifies 3871638 specifically as the upper seal ring.
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MA3H – Cummins 3871638 is a genuine OEM rectangular seal ring used as the upper seal ring in Jacobs engine brake assemblies. Cummins/Jacobs service literature for the 411 / 411C / 411D brake models identifies 3871638 specifically as the upper seal ring.
| Weight | .5 lbs |
|---|---|
| Dimensions | 3 × 3 × 3 in |
Product identification
Products explicitly described as “Genuine OEM” are genuine original equipment manufacturer parts. Other references to OEM names, part numbers, or model numbers are provided to identify compatibility and do not imply that a product is OEM.
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