I have what appears to be a 11GPM hydraulic pump which was run with no
fluid by the previous owner. I took the pump apart and it appears to
have two rods with top and lower gears in two sections. One of the
smaller gears is split in half. Numbers on the pump are as follows:
This pump goes on a 2004 Yard Machines MTD 25 Ton Log Splitter.
Does anyone know where I can get this gear from? Should I just trash
the pump and buy a new one from Northern instead?
Any help is appreciated.
On 16 Mar 2005 07:29:41 -0800, the inscrutable "ltlbull"
That could lower the pump pressure a tad, huh? ;)
How does the chamber look with the gears out? If it needs rebuilding,
is it rebuildable? Otherwise, look to www.surpluscenter.com or try the
mfgr that Lew gave you.
Yea, though I walk through the valley of Minwax, I shall stain no Cherry.
You'll almost certainly have to replace the pump.
The internal clearances in a hydraulic pump are measured in the
ten-thousandths of an inch (~ 1/30th the thickness of paper).
Depending on how long the pump was run dry, the working surfaces inside
the pump may be ruined.
Check for any wear or scoring you can feel with your fingernail. If
you find any, it's not worth gambling on. Toss the pump and buy new.
Even tiny gaps will prevent the pump from developing full pressure.
Find a small engine shop that deals with MTD stuff and see if they can
source parts for the pump. Because these parts have to be so closely
matched, my guess is that you can't buy just a single replacement gear.
But if you can, get a seal kit too.
If MTD doesn't sell parts, and you still want to try fixing it, you can
also try bringing it into an industrial hydraulics supplier to see if
they can determine the manufacturer (likely Haldex, but may not be),
and if they can get parts. Cost and effort by this point will likely
exceed the price of a new pump, however.
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