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Old 08-30-2017, 10:20 AM   #1
Alpine Owners Club
Join Date: Jul 2003
Posts: 92
HWH WRV Hydraulic Systems Part List

Ref: 2002 36FT FDDS Alpine, 350HP, 190K miles, #74572

HWH Part List: MR409100.pdf

If you Google the above PDF file, it will bring up what appears to be a complete list of HWH systems that is WRV specific. It's printable and has HTML lines to drawings. The file Rev date was 06Apr17 so they must keep the RAP kits #s up to date.

My PS gen slide cylinder just gave out. The HWH label was inside the "c channel" that supports the generator, near the front cap, that you have to be skinny and young to find.
It was AP19228, which crossed referenced to repair RAP90520 (22" Stroke). HWH will sell the cylinders only, but they have to be produced (7 - 10 working days). My new one were labeled AP19228 again. I think Dr Dave (?) provided a repair process that was spot on. Mine was a field repair so not having correct tools and clearance issues were a pain. I replaced both sides, same PN.

Note: Chill Will provided the 2001 cylinder reference of AP18257, RAP90657 (32" stroke), so they made a change between years.When?

Pearland, Tx
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Old 08-30-2017, 11:58 AM   #2
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yeah, if hwh changes a fitting size or direction, or some other thing, they give it a new part number. that way, you are supposed get an exact replacement.
its that way with jack cylinders. if they change something on the housing or something other than the cylinder, the whole assembly gets a new part number, and the same cylinder will fit more than one application.
it helps to keep up with improvements or changes within the hwh numbering system.
sometimes, if the rod of the cylinder isnt damaged, the o'ring can be changed. just be sure to get the same size
this will get you thru till you can get it repaired.
btw, hwh gives a one year warranty on any cylinder repaired by them. that coupled with the cheap price of repair make it a good deal. if you have time to do it.
it takes about four weeks total.
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ems, hwh, hydraulic

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