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Old 04-27-2020, 09:34 PM
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Default Wood splitter problem

Friend's Huskee 22 ton splitter quit splitting hard wood, but will go through soft stuff, like pine. Engine seems to run just fine, but when ram meets a 12' chunk of maple it balks. It appears that the hydraulic pump is not advancing to the second stage (2 stage pump), and the hydraulic control valve will not bump the lever back to neutral after the ram reaches full return.

Will appreciate any diagnostic tips to fix. Thanks!
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  #2  
Old 04-28-2020, 07:48 AM
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Did he recently change the oil?
Or is there water in the oil?
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Old 04-28-2020, 08:21 AM
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weak master relief valve ? (or dirt in it)

The valve "kick off" is set just high enough to retract the ram, any stickiness
in the slide, cylinder etc. will cause it to trip off early.

So these get set a bit high (to eliminate nuisance tripping), maybe high enough to need the 2nd stage of the pump.

You may not even be getting to the second stage if the master relief
is blowing off under that value.
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  #4  
Old 04-28-2020, 12:56 PM
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Shade Tree Welder Shade Tree Welder is offline
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Quote:
Originally Posted by digger doug View Post
weak master relief valve ? (or dirt in it)

The valve "kick off" is set just high enough to retract the ram, any stickiness
in the slide, cylinder etc. will cause it to trip off early.

So these get set a bit high (to eliminate nuisance tripping), maybe high enough to need the 2nd stage of the pump.

You may not even be getting to the second stage if the master relief
is blowing off under that value.
Dougie hit the likely culprits, I would add...

A blown seal in the cylinder.
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Old 04-28-2020, 03:21 PM
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I would add that the quick, first, thing is to clean the filter.
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  #6  
Old 04-28-2020, 03:38 PM
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Quote:
Originally Posted by Ironman View Post
Did he recently change the oil?
Or is there water in the oil?
No to both... oil looks good.
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Old 04-28-2020, 03:42 PM
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Quote:
Originally Posted by kbs2244 View Post
I would add that the quick, first, thing is to clean the filter.
New filter made no difference in poor performance.
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Old 04-28-2020, 07:38 PM
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Quote:
Originally Posted by Shade Tree Welder View Post
Dougie hit the likely culprits, I would add...

A blown seal in the cylinder.
Ork Ork Ork …..
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  #9  
Old 05-03-2020, 10:39 PM
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Plumb a high pressure gauge into the line at the pump, then take readings. That will tell you more then you can tell with your eyes or ears.
My splitter has a 5000psi glycerin filled gauge plumbed in. When I built the splitter, I had that gauge from work. It has come in handy in setting relief pressures.
Dan.
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  #10  
Old 05-04-2020, 01:20 AM
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I was hoping to T in a pressure gauge, but the friend got inpatient, and took the splitter to a shop for repair. It'll cost him a lot more than I would have charged for the fix.
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