Description
MA3H –
Cummins 4026537 is a rectangular center/middle solenoid seal ring used in Cummins/Jacobs engine-brake assemblies.
Cummins Intebrake documentation specifically shows the three different solenoid seals as:
- 3871638 — Upper solenoid seal
- 4026537 — Center solenoid seal
- 3871218 — Lower solenoid seal
- There is an important older-number relationship here: Cummins/Jacobs N14 documentation identifies 3871217 as the center seal and also assigns it Jacobs 001082. Because both Cummins numbers are tied by Jacobs directly to the same Jacobs part number, 3871217 is a legitimate cross/reference for 4026537.


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