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Topic: HWH Jack System (Read 553 times) previous topic - next topic

HWH Jack System

Well on second day out and arriveing at RV site, the HWH jacks does nothing except I hear some clicks when I turn it on.  The On power lite will start flashing.  No blown fuses on box under the couch.  How do you test the box under the couch?  Can you have it repaired ?
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653

Re: HWH Jack System

Reply #1
Check the hydraulic pump behind the front bumper. Could be a bad solenoid, connection or a bad pump.
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 Jack System

Reply #2
Hi red,
  Thanks for the response.
  Everything was working fine the other day, tried to lower jacks and the driver side front and rear jack lites flashed.  I turned it off.  I turned the system back on and the power lite flashes and I hear a click under the couch and under front bumper.  No other signs to report.
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653

Re: HWH Jack System

Reply #3
Up front you'll find the HWH hydraulic tank and solenoids. As RedTractor recommended, I'd check all of those connections first and also make sure your hydraulic oil is at the proper level and that the filter is clean. Here's a bunch of photos from our 93 225 which is likely similar to yours.
jor

Re: HWH Jack System

Reply #4
Hi Jor,
  Thanks for all the help and photos.  Mine is a lot yours.  Today I will check those things.  More info later.

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

Re: HWH Jack System

Reply #5
Hi All,
  The pump motor is the problem.  I took it apart and 3 out of 4 brushes were stuck in their holders not touching the armature.  Looks like caused from heat.  I would try to repair but just don't want the problems down the road.

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

Re: HWH Jack System

Reply #6
Hi All,
  The pump motor is the problem.  I took it apart and 3 out of 4 brushes were stuck in their holders not touching the armature.  Looks like caused from heat.  I would try to repair but just don't want the problems down the road.

Thanks to all,
Pat,
If the commutator isn't worn and brushes still have length, light sanding will free them up in their brush holders.  Only you have eyes on and can tell if the problem occurred because of lack of use.
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 Jack System

Reply #7
Over heating will result in a weakening of spring tension on the brushes which could be the reason that the brushes are hanging up in the brush holders.  The HWH manual talks about operating conditions that may cause over heating.  I would call the HWH technical folks and get their take on the situation.  That pump draws a lot of current and if it is operated improperly, it will over heat.    Have a great day.  ----  Fritz

Fritz & Kathy Johnson
1991 36'

Re: HWH Jack System

Reply #8
Hi toolMan & Fritz,
  The problem was not  caused by lack of use, I use the jacks all the time, even at home.  The motor is in good shape looking at it.  Three out of four brushes are not moving in and out of holders.  They are so tight, I use a allen head wrench to push them out and my finger to push them in and it is hard.  The pics show the parts.  I will work on the motor later and replace with a new one.  Over heating is the problem.  I never need to run the system more than a minute or two.  Most all places are close to level.  I have not done any cleaning of the parts, this is how it came apart, it is very clean.

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

Re: HWH Jack System

Reply #9
It looks like to me you need new brushes and it looks like you can get new brush holders and brushes. I would see if they are available
clean the commutator put new brushes in and you should be good to go.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: HWH Jack System

Reply #10
It would be good for you to understand the reason for over heating.  It could be too long of sustained operation or operating the pump when battery voltage is low.  A low battery voltage will increase the operating current which means that it takes less time than normal to heat up.  (Time of operation is not the only variable in the equation)    HWH tech support should be able to give you other things to consider.  Have a great day  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: HWH Jack System

Reply #11
When I look at your pictures it looks like your brushes are worn out and the commutator looks like the brushes were not touching
properly, worn brushes. It doesn't look like over heating. Those 2 bolts 8.8 if they are removed the brushes and the brush holders
can be replace.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: HWH Jack System

Reply #12
I don't know what happened here, but I sanded the edges of the brushes and got them to slide easly in and out of the holders.  Light sanding on commutator.  Put it back together and the HWH system works fine.  I also ordered a new motor for $73 from amazon and the web page told me I had ordered this motor in jan 21, 2019.  Last year the motor was $20 higher.  I hope the new motor will be better than the last one.  I am sure I will get to use it.

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

Re: HWH Jack System

Reply #13
That chocolate brown color is good for a motor commutator.  The pitting not so much so.  It sounds like the brushes were too tight in the holders from the get go.

https://www.foreforums.com/index.php?action=dlattach;topic=39564.0;attach=95588;image
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 Jack System

Reply #14
I use a red scotch cloth to resurface the commutator ring
"Riding and rejoicing"
Bob & Susan
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4