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Old 07-21-2013, 05:15 AM   #1
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Generator Slide Creeps

I have a generator slide that runs on hydraulic motor.
The slide creeps, about 1 inch in 8hrs or so.

I have tried the following so far, but no success yet

1. Ran the generator slide out using IN/OUT switch until its end (open or close) and hear the motor pitch change thereby indicating build up of pressure, for a few seconds past the stops.Slide still creeps out in a few hours.

2. Open both the solenoid valves (one for retract and another for extend) T handle by hand (turn it counterclockwise a few times) all the way out. The slide immediately retracts (so there is pressure). And then close the valves (by turning T handle clockwise) and hand tighten them. The slide creeps over a few hours again.

Any other suggestion would be great!

thanks
jim
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Old 07-21-2013, 05:21 AM   #2
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Sounds like you may be low on fluid.
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Old 07-21-2013, 06:38 AM   #3
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I'm not sure if this is the case on a generator slide but , I had a wall slide that would creep out as we were driving once. There was an electric brake that held the slide tight against the wall but the brake had failed and allowed the slide to vibrate out as we drove.
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Old 07-21-2013, 06:46 AM   #4
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This is a hydraulic slide. There are no brakes on a hydraulic slide. The fluid pressure keeps the slide in place.

I am guessing it has something to do with the extend/retract solenoids or seals in them or maybe there is air in the lines from the last time (last week) when i was practicing how to close the generator slide manually in case the hydraulic systems fail

I will check on the fluid level, but i am pretty sure i am covered there.
thanks
jim
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Old 07-21-2013, 07:10 AM   #5
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I'm not a hydraulic wizard by any stretch, but logic would dictate a leak to the ground, in the seal or a valve allowing fluid back to the resevior.

I suppose air in the lines could cause this to a certain point, until it was fully compressed. I'm thinking if it only retracts 1" in a day, have you left it for severals days to see if it keeps going or until all or most pressure was gone?
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Old 07-21-2013, 07:17 AM   #6
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Quote:
Originally Posted by clyon51 View Post
I'm not a hydraulic wizard by any stretch, but logic would dictate a leak to the ground, in the seal or a valve allowing fluid back to the resevior.

I suppose air in the lines could cause this to a certain point, until it was fully compressed. I'm thinking if it only retracts 1" in a day, have you left it for severals days to see if it keeps going or until all or most pressure was gone?
I haven't tried for several days. I will do it now and see what comes out
thanks
jim
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Old 07-21-2013, 11:58 AM   #7
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Had a problem with hydraulic side slides on a previous coach. Didn't happen often in winter, but they would creep in summer. I sorta figured the oil was getting warm and expanding, but that was just me guessing.
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Old 07-21-2013, 04:06 PM   #8
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IMO, there is some air trapped in the lines somewhere, due to low oil level at some time. Oil-or any liquid, cannot be compressed like air. Often, the mfgr. puts a safety lock/pin on the slide mechanism to prevent this from happening unintentionally. My genset is air-operated, Winnebago states in their owners manual to always use the safety lock; otherwise a quick stop may allow the genset to extend accidentally.
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