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M55 VS M55HV pump?
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Bruce Williams
DRR Pro
Picture of Bruce Williams
posted
Is there any difference in gear/body size between the M55 and M55HV pump, or is it just a stronger relief spring?

I have been all over the Melling web site and all I have found is the difference in the springs.

I would "think" the HV pump would have a larger pump cavity so as to provide the additional 25% oil volume they advertise.


Bruce Lee Cool

Experience is what you get when you don't get what you want.
 
Posts: 2105 | Location: Chandler Arizona | Registered: August 11, 2005Reply With QuoteReport This Post
Wooley
DRR Sportsman
posted Hide Post
The body and gears of the hv pump are 1/4 inch longer than the non hv pump. That’s is what creates the extra volume.
 
Posts: 547 | Location: Going to or returning from the chipmine. | Registered: July 01, 2011Reply With QuoteReport This Post
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