Brake and Hydraulic Jack Issues After 2-1/2 Years in Storage

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After 2-1/2 years parked in enclosed storage, a member prepared a Montana fifth wheel for travel by replacing brakes and drums, then found the trailer brakes would not respond until the plug and cord were replaced. When hitching up later, the hydraulic jacks began retracting, the pump made a bad sound, and the jacks stopped, forcing the member to support the front with 20-ton hydraulic jacks, release the hitch safely, and cancel planned stops.

The member replaced the pump assembly, flushed...
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DadsHemi

Senior Member
RV LIFE Pro
Joined
Sep 4, 2017
Posts
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Location
Florence
We’ve been at home-base for the last 2-1/2 years. Parked the Montana in an inclosed 60’ storage and haven’t moved it. Was need some work and we had plans to spend two weeks in Navarre Beach this past April, so in preparation I decided to replace all the brakes and drums as it did need it. Well…. Once it was completed and manually adjusted the brakes my son and I hooked up…squeezed the brake controller and nothing…. Put it drive and pulled it around the storage yard, back up countless times and nothing. Ended up having to replace the plug and cord. Anyways finally got it all working two days before we had to leave.

Ok now for the next chapter, went to hook up and once the hitch was lock I push the retract jacks… and they started to retract and heard the jack pump making a not so nice sound and the jack stop retracting. All six jack were off the grand so the weight was on the truck.

Well I was able to put two 20 Ton hydraulic jacks under the two front jack, lifted the 5th enough to release the hitch, blocked the tires and pulled out with out any incidents.

Need less to say we had to cancel two places.

Ordered a new pump assembly and installed, flushed the jacks and lines, replaced leaky lines.

Cross our finger no other issues arise, we’re headed to Serverville TN for10 day on the 3rd of July.
 
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All is working well, took a little bit for the ACs to get going. Parked at a place in town for a few days to bring it live and make sure everything is working properly. Also to load it up with all our stuff
 
If you did not flush your hyd fluid after the pump change, recommend you do it. Every 5 years is a good practice.
 
“Flush your hydraulic fluid” ? ? ?
Does that mean to suck out the fluid in the reservoir (for example - with a turkey baster) and fill with new fluid?
 
“That is correct, use the anti-stiction fluid.”

So, I should use 100% anti-stiction fluid? Not a mixture of Dexron III + anti-stiction fluid?
During summer of 2018 I sucked out a quart of the OEM fluid and added a quart of motorcycle fork oil, so it was a mixture.
 
All is working well, took a little bit for the ACs to get going. Parked at a place in town for a few days to bring it live and make sure everything is working properly. Also to load it up with all out stu
 
I use 1 Quart of suction and the rest is Dextron, I use a suction gun to pull all the fluid out of the reservoir.
 
If you did not flush your hyd fluid after the pump change, recommend you do it. Every 5 years is a good practice.
I flushed all the fluid out, replaced hydraulic lines. Used Dextron and 1-1/2 Qts of 15W Maxim fork stiction/fork oil. All went very well, and had no leaks.
 

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