Re: changing hydraulic pump rotation

Posted by farmalldan on January 19, 2006 at 06:56:26 from (64.154.26.250):

In Reply to: changing hydraulic pump rotation posted by Yellott Canby on January 18, 2006 at 20:06:24:

Yellott,
Some hydrauic pumps are designed to run in either direction. However, it may be difficult to confirm this at this stage of the game. Many gear and vane pumps are reversible by reversing the "cartridge". The cartridge is the center section of the pump which contains pumping element and sometimes ports. The cartridge is reversed end for end. However, you will have to check for proper seal drain function or you will constantly blow shaft seals or maybe the case. If external seal drains are not present, then the seal cavity is internally drained back into the pump suction (most common). Bidirectional pumps are usually drained into both ports via check valves so that the suction automatically accepts any leakage into the seal cavity. On rare occasions, different end plates are required when reversing rotation to accomodate the seal drain function. Piston pumps don't usually (be careful here. There are many exceptions in the heavy duty market) care which direction they rotate if the seal drain issue is addressed. Best to identify your pump and consult with the manufacturer to determine if and how it can be reversed. Otherwise, you risk blown shaft seals or possibly a ruptured pump case. Good luck.

Replies:

• Re: changing hydraulic pump rotation Yellott Canby 19:46:18 01/19/06 (0)

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