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Old 04-21-2019, 11:43 PM
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MetalWolf MetalWolf is offline
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Default Need search help locating schematics for Hydraulic R/V pump

Need a little help locating a schematic for this rotary vane hydraulic pump
and am not having much luck. So, I figured I'd reach out to you guys to see what yall might be able to help me come up with. looking for, diagrams and parts breakdown. Or, assembly diagrams would be great.
I need to replace the shaft in this thing and just can't seem to find what I need.
Can try to get better pics tomorrow if needed
Thanks'
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Old 04-21-2019, 11:49 PM
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Why is the shaft bad? Splines worn? If so check the crank damper for failure

Most vane pumps are pretty simple, I’m sure you have the skill to R&R the shaft. Have you priced it both ways? Sometimes the parts are higher than a complete assembly.

Is this the powersteering pump?
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Old 04-22-2019, 02:09 AM
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Will this help? not quite the same number.

http://www.hydba.com/docs/product_pd...1421398966.pdf

A4VG series 32 axial piston variable pump

http://synergywirelineequipment.com/...vicemanual.pdf


I guess you have a AA4VG56
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Last edited by GWIZ; 04-22-2019 at 02:32 AM.
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Old 04-22-2019, 02:58 AM
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Quote:
Originally Posted by GWIZ View Post
Will this help? not quite the same number.

http://www.hydba.com/docs/product_pd...1421398966.pdf

A4VG series 32 axial piston variable pump

http://synergywirelineequipment.com/...vicemanual.pdf


I guess you have a AA4VG56
Yes, it helps the pump is good but shaft coupling splines are chewed up from bolt breaking at engine driveline coupler. just was not coming up with much on this pump.
Thanks'
GW...
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Old 04-22-2019, 03:33 AM
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Quote:
Originally Posted by SmokinDodge View Post
Why is the shaft bad? Splines worn? If so check the crank damper for failure

Most vane pumps are pretty simple, I’m sure you have the skill to R&R the shaft. Have you priced it both ways? Sometimes the parts are higher than a complete assembly.

Is this the powersteering pump?
Not sure where in the system it goes, it came off a mobile oil drilling/pulling rig... But, yeah, the splines were jacked up from a bolt breaking at the engine driveline coupler.

The shaft was cheaper than the replacement pump. so, he opted to just replace it. Being the pump itself is working fine within correct pressures...

I've done some RV pumps in the past but this so far is a bit different and larger than ones I have done in the past... I just didn't want to get in and find I've shaken a hornets' nest for myself...

I can usually look at something and know it's not going to be an issue but sometimes I just need a diagram or parts break down to know which direction to go with it... most RV pumps I have done are small farm tractor pumps or rotary drive motors... basic and simple.
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Old 04-22-2019, 06:58 AM
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That’s a variable displacement rotary pump btw. Waaay different than a vane pump.
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Old 04-22-2019, 08:23 PM
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I was able to get it done today... Man, what a PIA it was though had to take the whole thing apart to get the main shaft bearing out and replace it along with with the half moon cradle bearings... then the plunger valves were not cooperating very well but finally got them in.

Then I had to deburr the new shaft from the slight machining burs left behind So it took me a little while to finish it up. So, now ready for a coat of paint and date stamp it, and send it back...

Got pics of some on my cell phone I need to transfer over but here is a couple with the new camera and a pic of an unexpected visitor.

would have never noticed it in the tree just 15' outside my shop window, but it turned its head and then caught my attention while I was taking a sit down break.
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Old 04-23-2019, 12:03 PM
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So here are some pics of the finished hydraulic pump.
SmokingD was right it was quite A bit different than the usual R/V pump... It was a total PITA getting it all back together but more time-consuming... and a bit frustrating reinstalling some of the smaller parts and keepers. but all in all, it came out ok turns out it needed more than the shaft the front bearing was oddly split in the inner race needed the metal gaskets backing the rotary cartridge and the usual seals but for the most part, was super clean internally.

And now has a fresh coat of paint... seems customers are more often happier if you repaint the pumps and other hydraulic components before returning them.
it's od because if you don't throw a cheap coat of paint on them they seem to feel as if their not getting their monies worth on the repair or rebuild...

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  #9  
Old 04-23-2019, 02:47 PM
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Looks good. Yeah, a $3 rattle can can make the job look professional


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