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Old 06-17-2012, 01:57 AM
siets siets is offline
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Hydro pump leaks on exmark

I recently bought a 60 inch exmark that needed work. One thing that needed to be fixed was the right side hydro pump, because it was missing. (Previous owner used this mower as a parts vehicle) i purchased a brand new one and installed it, it worked perect for about 10 hours and all of a sudden i lost all hydraulic pressure. After looking I found my entire pulley compartment full of fluid. And i found that it was all coming from around the shaft. Being the pump was under warranty the local dealer replaced it out for a new one. However after installing the second new one it did the same thing with less than an hour on it. Anyone have an idea where i can start? It seems that it happens when the mower is running but not moving.
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Old 06-17-2012, 11:12 AM
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Kelly's Landscaping Kelly's Landscaping is offline
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I doubt hes going to cover the second pump for you. Something took out 2 pumps in a few hours assuming you serviced the hydraulic fluid and flushed out the hoses changed the filter and made sure that was all good that leaves one thing. You likely got a bad wheel motor and they cost more then the pumps. The wheel motors when they break up send metal up the hoses and bye bye pump.
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Old 06-17-2012, 11:26 AM
orangemower orangemower is offline
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Let me get this straight. You bought a junkyard mower and expect it to work by just putting a pump on it?
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Old 06-17-2012, 11:35 AM
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Richard Martin Richard Martin is online now
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This may have been why it didn't have the wheel motor to begin with. Remember:

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Old 06-17-2012, 12:25 PM
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Kelly's Landscaping Kelly's Landscaping is offline
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And when House is proven wrong and the person didn't lie he gets really pissed and becomes even more obnoxious.
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  #6  
Old 06-17-2012, 01:01 PM
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piston slapper piston slapper is offline
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Something doesn't add here...
For the pto seal to fail...
It is either external damage...something wrapped around or contacting the shaft..
Shaft seal overheating from bad bearing...or years of use...
Or..an improperly installed seal..
Was there any metal in the hydro tank...
It is possible that 2 defective pumps could come from the same vendor..
They are still assembled by people...however if that's the case...they probably have more than 2 pumps being returned...
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Old 06-17-2012, 03:25 PM
siets siets is offline
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I have changed all fluids and checked the hoses, the wheel motor is working fine with no metal shavings at all in the lines or anywhere else.
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Old 06-17-2012, 03:42 PM
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piston slapper piston slapper is offline
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With no shavings present...its plausible that the seal is defective..
There should never be enough pressure in the fluid inside the pump to blow out the seal...all the pressure should be isolated between the pump rotor and the head..
Only a teardown by a trained technician...will show the reason of the failure..
Do not take it apart if you expect to exchange it for a new one...
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Old 06-17-2012, 03:44 PM
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BigFish BigFish is offline
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Did you check the pump to tank return line/s for an obstruction/partial ?
Hey, them hoses are cheap, I'd replace em.
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  #10  
Old 06-17-2012, 03:47 PM
siets siets is offline
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That is one hose i have not checked. Could that cause enough back pressure to be giving me problems. I will check it out and let you know. Thanks
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