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Old 05-01-2013, 04:16 PM   #1
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Hydraulic Slide - Sneaking Out?

When we button up the MH and go on the road, we pull in the single slide on our Clipper. But sometime later, I notice the slide is no longer flush with the MH. Not a lot, maybe 1/4 -1/2" at the bottom. Should I be concerned?

Also, I thought I read in the panel that there is some latch on the inside I'm suppose to make when the slide in drawn all the way in, but I surely don't see/feel it.
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Old 05-01-2013, 04:22 PM   #2
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Sounds like that latch you can't find would prevent it from creeping out....
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Old 05-05-2013, 05:25 PM   #3
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Do you hold the in-switch in for a moment after the slide is fully in to make sure.

Leaking seal inside the hydraulic cylinder would allow it to creep out enough until the pressure was relaxed.

My Cutter is supposed to have slide locks on the top or ???? - probably just blocks of wood - but they weren't in it when I bought it.
Unless those locks were electrically interlocked there is no way I would use them (especially if they were on the top) unless the structure was strong enough that no damage would be caused by trying to extend the slideeout with the locks in place.
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Old 05-05-2013, 08:43 PM   #4
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It's probably not leaking seals in the cylinders if there is no evidence of hydraulic fluid visible anywhere. The greater probability is a leaking actuator solenoid at the manifold on the hydraulic pump.

Which system do you have? HWH, Power Gear or another?
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Old 05-06-2013, 02:05 AM   #5
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I meant an internal leak past the piston seal which means there would be no external leak visible. When the slide goes in, the top hits first so when the bottom goes in there is some force tending to push the bottom out an inch. Normally resisted because the centre closed control valve locks the cylinder in position. If the piston seel was allowing oil to leak past, the piston is not locked and could extend until the pressure eases off enough to effectively lock the cylinder again.

Just a possibility that could be looked at if the control valve is found to be OK.
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Old 05-06-2013, 09:40 AM   #6
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thanks guys. i'll see if I can find a hydraulic schematic which might help me out some more.
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Old 05-06-2013, 10:17 AM   #7
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A friend had the same problem on a different brand MO, but could be the same cause.
On his, there are valves for in and out for each slide located near the pump. Those valves are to be opened if you need to manually crank the slide in or out, then closed. One of those valves was malfunctioning, and allowing the residual pressure in the system to pass through and slowing pushing the slide out. The valve was replaced and all is well

You might check your out.
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