One jack sticking

listen to doug
he doesnt get paid to answer all these posts.
he does it on his own. he doesnt solicit
service work or sell parts here
he does it, imo, because there is a need for
good substantiated answers, based on experience,
and the service manual
he sees many times the problems that an individual owner sees.
like i said, listen to doug. i havent seen a wrong answer yet.
i monitor this site, as well as others, and also answer questions.
there is no need to add my response, because it would be the same
as dougs.
i work for hwh full time. i also do not sell parts or service on this forum

PursuitInsight wrote:
sorry about this. i related my experience, first hand and this was 3 weeks ago that i replaced the oil. i only wanted to help and have no explanation but the result was that 1 year of 2x4 and a wood block (still in the motorhome) action is no longer required.

i experienced it, you know better
Yves

edit: brake fluid is contaminated by rubber deterioring and not moisture
it becomes black with hose particules

Brake fluid breaks down from heat and absorbs moisture which results in lower boiling points in the brake fluid which leads to brake fade failure under hard braking and Class Gassers all have hot brakes at one time or another

Guys,
I was just asking for some help. It was not my intent to start a war!
Please note: ALL I did to get my sticking jack to function properly was to spray the shaft with some WD40 as several of you had suggested.
I'd did not push,pry, jiggle or pound it. In fact, I did NOTHING else other than to push the "Store" button on the control panel.
At this point, while the symptoms may indicate to someone more knowledgeable that other action may be required down the road, I, as a layman can only say that it wasn't working, and now it is.
Bob

sorry about this. i related my experience, first hand and this was 3 weeks ago that i replaced the oil. i only wanted to help and have no explanation but the result was that 1 year of 2x4 and a wood block (still in the motorhome) action is no longer required.

i experienced it, you know better
Yves

edit: brake fluid is contaminated by rubber deterioring and not moisture
it becomes black with hose particules

usersmanual wrote:

dougrainer wrote:

usersmanual wrote:

bmwbob wrote:
I just tried the WD40 and it worked like a charm!
I didn't have to touch the jack.
I put them all back down, gave each one a shot of WD 40, then cycled them a few times.
All is well.
Thanks, folks!
Bob

iam seriously glad the jack is working for you but the WD40 application really has nothing to do with a HWH jack ram sticking or not sticking. The two main reasons they stick is because the release valve is not releasing fully or the return springs are weak

Sorry, the MAIN reason a jack sticks and has to be pried up is the Internal seals have failed. I have NEVER had a solenoid partially release.(30 years of HWH jack service). The OP has done a temporary fix. Once the WD40 wears off the jacks will stick again. UNDER HWH warranty, they replace the cylinder when this happens. Not some lube or clean to get it fixed. Exercising the jacks when this happens makes the internal seal pliable for awhile, then it starts sticking again. MY test for this problem when customers come in is the extend the jacks for 48 hours and then retract. IF any jack fails to fully retract in 5 minutes, I replace that cylinder. If I operate the jacks when the customer drops off, the odds are the offending jacks will operate to spec. Waiting that 48 hours allows the defective seal to shrink slightly. If you think a solenoid is not fully releasing, just open the manual release on that solenoid. OR crack open that hydraulic line and you will see the jack fails to retract. Doug

yes I know about the seals but I knew the WD40 did not fix his problem
I had a solenoid fail once and had to replace it.So i assumed(right or wrong) maybe they could stick at partial opening and maybe impede the jack retraction
I know weak springs for sure can cause his problem wheather u agree or not

Springs, YES. BUT as I stated, to verify if you think springs are the problem, put in retract mode, when the jack stops, try to push it up with your hand. If the jack retracts by hand, replace the springs. If it does NOT, and you have to lever it up, the springs are NOT your problem. Doug

PursuitInsight wrote:
dougrainer
4. HWH Fluid(dextron 2 or 3) Does NOT get "old" and replacing the fluid will not fix the problem

I love this answer.

I tried it all: silicon, w40, exercice the Jack, push it with a 2 by 4

Then last replace the fluid and worked right away

You would never replace the brake fluid either. Old oil ....
What an Idea to replace it

It akso stopped the Pop cracks every now and then

Edit: oil was mercon V

You replace Brake Fluid because IT can be moisture contaminated. HWH or just any Hyd Jack fluid, does NOT suffer from any wear and tear like a Transmission. There is NOTHING in a Jack system to deteriorate the fluid or contaminate it. Of course, what do I know. Just 30 years of working on all brands of Hydraulic Jack systems. If you want to replace the fluid, go ahead, but it is a waste of time and money. I have NEVER in 30 years had a problem that could be related to "OLD" fluid in the system. Doug

dougrainer
4. HWH Fluid(dextron 2 or 3) Does NOT get "old" and replacing the fluid will not fix the problem

I love this answer.

I tried it all: silicon, w40, exercice the Jack, push it with a 2 by 4

Then last replace the fluid and worked right away

You would never replace the brake fluid either. Old oil ....
What an Idea to replace it

It akso stopped the Pop cracks every now and then

Edit: oil was mercon V

dougrainer wrote:

usersmanual wrote:

bmwbob wrote:
I just tried the WD40 and it worked like a charm!
I didn't have to touch the jack.
I put them all back down, gave each one a shot of WD 40, then cycled them a few times.
All is well.
Thanks, folks!
Bob

iam seriously glad the jack is working for you but the WD40 application really has nothing to do with a HWH jack ram sticking or not sticking. The two main reasons they stick is because the release valve is not releasing fully or the return springs are weak

Sorry, the MAIN reason a jack sticks and has to be pried up is the Internal seals have failed. I have NEVER had a solenoid partially release.(30 years of HWH jack service). The OP has done a temporary fix. Once the WD40 wears off the jacks will stick again. UNDER HWH warranty, they replace the cylinder when this happens. Not some lube or clean to get it fixed. Exercising the jacks when this happens makes the internal seal pliable for awhile, then it starts sticking again. MY test for this problem when customers come in is the extend the jacks for 48 hours and then retract. IF any jack fails to fully retract in 5 minutes, I replace that cylinder. If I operate the jacks when the customer drops off, the odds are the offending jacks will operate to spec. Waiting that 48 hours allows the defective seal to shrink slightly. If you think a solenoid is not fully releasing, just open the manual release on that solenoid. OR crack open that hydraulic line and you will see the jack fails to retract. Doug

yes I know about the seals but I knew the WD40 did not fix his problem
I had a solenoid fail once and had to replace it.So i assumed(right or wrong) maybe they could stick at partial opening and maybe impede the jack retraction
I know weak springs for sure can cause his problem wheather u agree or not

usersmanual wrote:

bmwbob wrote:
I just tried the WD40 and it worked like a charm!
I didn't have to touch the jack.
I put them all back down, gave each one a shot of WD 40, then cycled them a few times.
All is well.
Thanks, folks!
Bob

iam seriously glad the jack is working for you but the WD40 application really has nothing to do with a HWH jack ram sticking or not sticking. The two main reasons they stick is because the release valve is not releasing fully or the return springs are weak

Sorry, the MAIN reason a jack sticks and has to be pried up is the Internal seals have failed. I have NEVER had a solenoid partially release.(30 years of HWH jack service). The OP has done a temporary fix. Once the WD40 wears off the jacks will stick again. UNDER HWH warranty, they replace the cylinder when this happens. Not some lube or clean to get it fixed. Exercising the jacks when this happens makes the internal seal pliable for awhile, then it starts sticking again. MY test for this problem when customers come in is the extend the jacks for 48 hours and then retract. IF any jack fails to fully retract in 5 minutes, I replace that cylinder. If I operate the jacks when the customer drops off, the odds are the offending jacks will operate to spec. Waiting that 48 hours allows the defective seal to shrink slightly. If you think a solenoid is not fully releasing, just open the manual release on that solenoid. OR crack open that hydraulic line and you will see the jack fails to retract. Doug

bmwbob wrote:
I just tried the WD40 and it worked like a charm!
I didn't have to touch the jack.
I put them all back down, gave each one a shot of WD 40, then cycled them a few times.
All is well.
Thanks, folks!
Bob

iam seriously glad the jack is working for you but the WD40 application really has nothing to do with a HWH jack ram sticking or not sticking. The two main reasons they stick is because the release valve is not releasing fully or the return springs are weak