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Old 06-24-2014, 12:53 PM   #1
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Help (!) with manual slide retraction

I have an '02 34' FDDS with the HWH Series 610, Model AP14045. The system seems to be working fine but the slide room is racking. The front starts in first and if I try to bring it in more than 4 inches, it will take out the cabinets by the sink (rear).

It could be any number of things but I suspect the synchronization cylinder.

For now all I want to do is manually pull the slide in using the on-board winch. I have released all four 1 1/2" solenoids on the room slide manifold (because I can't tell the gen slide from the room slide solenoids) by turning each 1/4" nut four times. Pressure seemed to release on both the gen slide and the room slide.

I've attached the winch and cranked it until the strap is extremely tight and the bar between the arms seems to be bending. The room won't budge.

I can't stay where I'm at and just want to get moving. Any thoughts would be greatly appreciated!

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Old 06-24-2014, 01:08 PM   #2
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Just a guess.
What I would do is tighten all selonids back to normal.
Try to retract slide with control panel about 1 inch.
Then use winch to pull the end in that won't come in.
Maybe you can retract about 2 inches at a time and pull the other side in with the winch.
Thats what I would try next.
Pull the slide in about 2 inchs and then open all valves and try the winch.
Mine has a winch on each side.
Good luck

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Old 06-24-2014, 04:46 PM   #3
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if its like my slide you should and can move it by hand after valves are open

some thing is stopping it from moving

i would look to make sure some thing did not fall behind the slide or some thing on the floor under it thats blocking it from moving

i can move mine by one hand
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Old 06-25-2014, 08:04 AM   #4
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Make sure that after you have turned the T handles the four turns that you continue to turn them until you feel resistance and then some (the first 4 turns will be fairly easy) . Only then does the solenoid open and release the pressure.

2000 Alpine 38 FDS
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Old 06-25-2014, 08:05 AM   #5
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In your case the 1/4" nuts not T handles!

2000 Alpine 38 FDS
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Old 06-25-2014, 09:22 AM   #6
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Well, using a variety of equipment, I finally forced the slide in all the way. I can assure you it did not simply "slide."

I'm waiting for a call-back from HWH. Seems like: a) the rear slide cylinder is not working; b) the synchronizing cylinder is bad; or c) the rack sensing valve is bad. Any thoughts from others who have this problem? Does anyone know where the rack sensing valve is located on our motorhomes?

Thanks again for your thoughts. I really appreciate this forum.

2002 FDDS 34'
HWH Series 610
Model AP 14045
SN 795
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Old 06-25-2014, 12:35 PM   #7
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OK--what is a "rack sensing valve?"
Old Scout
2003 40' MDTS
Garden Ridge, Texas
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Old 06-25-2014, 03:49 PM   #8
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How did this start? Was there work done that opened the synchro cylinder or any other work on the hydraulics? Did it just start this last actuation?
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project
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Old 06-29-2014, 12:45 PM   #9
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dlukes, the sync cylinder is the culprit. this can be determined by placing two pressure gauges in line on each of the two lines from the sync cylinder to the room cylinders. observe the pressures while trying to retract the room. only momentary pressure is required. most folks dont have these gauges.
the pressure has to be equal. if not the sync cylinder is supposed to even them up. if this isnt happening, they sync will have to be replaced.
the chance of a room cylinder locking up is not ,imo, likely. i havent in 15 years replaced a frozen room cylinder.
the rack sensing valve is an older version (1980's 1990"s)of synchronizing room extension and retraction. it will have either one or the other. not both.
dlukes please call me if you need further help. 1-602-549-3638

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retract, slide

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