Ray,
I've dealt with these pumps, and it is commendable that you have supplied part #s. I am assuming the gasket is for the mating surface, the o ring is for the pump split, and the seal is the lip seal that keeps the engine oil out of the leveling system. The only thing I could add is to remind owners not to let the pump run out of hydraulic fluid, because the pump will be destroyed.

Thanks,
Peter

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