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Today we will discuss

Sundstrand Sauer Danfoss Series 90 – End Cap Gasket Change
In this service bulletin SB 1989-009 the 55cc end cap gasket design is changing to allow a single part number gasket to be used for both of the twin port and axial port end cap choices.
Both of the old style end caps will be no longer available as service parts. The new end caps can be used on older models. But the gaskets must be used on the newer models.
The old style end cap gaskets will be available as service parts on older models.

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