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Topic: HWH Hydraulic Level System(Jacks) (Read 653 times) previous topic - next topic

HWH Hydraulic Level System(Jacks)

Good Morning,
  WOW! It is my turn to have everything go wrong that can just before a short trip to Crysical Beach, TX.  Now I have the drivers side rear jack that is up(horizonial), but the jack cylinder is fully extended.  The control pad shows that the left rear jack is not down.  I have tried all the buttons with no luck.  What do I do next?  Any Ideas?

Old pump motor is still running good after repair to brushes.

Pat,
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653

Re: HWH Hydraulic Level System(Jacks)

Reply #1 –
Pat,

You can manually relieve the pressure to that jack by opening the "T" handle on the HWH manifold behind the front driver's side grill.

Then you might manually swing the kick-down jack to vertical a couple of times to make sure it is OK.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: HWH Hydraulic Level System(Jacks)

Reply #2 –
Hi Brett,
  Thanks for the response.  Which "T-handle" there are 4.  What makes the jack swing down?  The cylinder is fully extended and  I can swing the jack down and up easly.  It is free to move.
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653

Re: HWH Hydraulic Level System(Jacks)

Reply #3 –
No idea which handle it is.  Should be able to eliminate the front two by tracing the lines to the front jacks.

Have not experienced full jack extension without kicking down.  A puzzler.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: HWH Hydraulic Level System(Jacks)

Reply #4 –
Call the HWH tech support people, they are very helpful.  (563-724-3396).  Have a great day  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: HWH Hydraulic Level System(Jacks)

Reply #5 –
Thanks  Fritz for the response and phone number.  I found a manual and the LR jack "T-handle" from the tank end is the right most handle.  I tried to turn it and like always it BROKE off.  So I will go to the beach on friday and no worry about it until next week.  Just thinking, which is cheaper repair/overhaul old pump unit or buy a new/rebuilt unit?

Pat,
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653

Re: HWH Hydraulic Level System(Jacks)

Reply #6 –
Quote from: wolfe10 link=msg=392114 date=15917989  Have not experienced full jack extension without kicking down.  A puzzler.
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uote]
Nor have I, IHave had one jack (very slowly)  return to stowed position. HWH was very helpfull and suggested the methods others have listed above. I met a fellow with a SOB who had the same problem and told me he cured it by spraying WD-40 on the jacks when extended, 'excercise' them, then spray them with WD-40 silicone. Problem solved!  ^.^d
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: HWH Hydraulic Level System(Jacks)

Reply #7 –
Quote from: wolfe10 –
No idea which handle it is.  Should be able to eliminate the front two by tracing the lines to the front jacks.

Have not experienced full jack extension without kicking down.  A puzzler.
My '81 has a small jack that pushes the big jack vertical Don't know if HWH changed the system.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: HWH Hydraulic Level System(Jacks)

Reply #8 –
Those solenoid valves are replaceable. You could also loosen that line and let the pressure bleed off.
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins

Re: HWH Hydraulic Level System(Jacks)

Reply #9 –
I had a similar experience and cured it just by cycling the system, starting with retracting the jacks and then starting over.
88 Grand Villa 36' ORED 3208 (throwaway)Cat.
 Build # 3150
Happiness is the maximum agreement of reality and desire.

Re: HWH Hydraulic Level System(Jacks)

Reply #10 –
Quote from: pthurman48 –
Good Morning,
  WOW! It is my turn to have everything go wrong that can just before a short trip to Crysical Beach, TX.  Now I have the drivers side rear jack that is up(horizonial), but the jack cylinder is fully extended.  The control pad shows that the left rear jack is not down.  I have tried all the buttons with no luck.  What do I do next?  Any Ideas?

Old pump motor is still running good after repair to brushes.

Pat,

Is your problem that the jack cylinder refuses to retract?  Or is your problem that the jack refuses to kick down into place?
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: HWH Hydraulic Level System(Jacks)

Reply #11 –
Hi ToolMaker,
  My problem is the jack cylinder is fully extended.  The jack cylinder is horizontal.  The jack is free and I can pull it down and when I let go it returns to the horizontal position.  The fully retracted/up position the jack is at a slight angle, the jack now is horizontal.
I tried to turn the "T-handle" on the pump and the little "T-handle" broke off.

Pat,
The third pic is of the jack on the other side.
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653

Re: HWH Hydraulic Level System(Jacks)

Reply #12 –
Pat,

Worse case for returning it to the stowed position is to crack open the hydraulic line.

But sure want to know how it did that??
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: HWH Hydraulic Level System(Jacks)

Reply #13 –
Quote from: wolfe10 –
Pat,

Worse case for returning it to the stowed position is to crack open the hydraulic line.

But sure want to know how it did that??
On my '81 if both jacks are down and I lower one of them without the other the one I left alone will pop up like that.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: HWH Hydraulic Level System(Jacks)

Reply #14 –
Quote from: craneman –
On my '81 if both jacks are down and I lower one of them without the other the one I left alone will pop up like that.

But,. on the 1995, when the jacks are stowed, even if it was extended and horizontal, it would/should stow.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: HWH Hydraulic Level System(Jacks)

Reply #15 –
Mine will stow after I release the one that popped up. Or go vertical again if I pressurize it.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: HWH Hydraulic Level System(Jacks)

Reply #16 –
The jacks have  small tip down cylinders to set them vertical.  There should be small switches on the ends of the small struts to allow the main jacks to add fluid  after the strut hits the vertical switch .
  There is a stack of control solenoids behind the main pump that runs a all of this .
  The jacks are retracted by the large springs if the solenoids open and release the  pressure.  Holding the horizontal button should release the pressure in both the small and large cylinders  and return them to parked position.
  It is possible that the small T valves turn in Clockwise to release , instead of CCW.  Wiggle  gently. Spray. 

Re: HWH Hydraulic Level System(Jacks)

Reply #17 –
Just an update:
  I loosened the hydraulic hose at the jack.  Nothing happened.  So I pulled down on the jack and as it lowered the fluid ran out and the jack cylinder retracked. Tried the system again and all seems to be normal.  I don't have a clue what happened.

Pat,
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653