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Old 09-17-2013, 07:19 AM   #1
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Power Gear Jacks Shudder

The front jacks when retracting will sort of shudder. It has done this since I have owned it (Mar. 2013). I have put WD40 on the shafts and they look nice and bright, shinny. I am thinking that because the front wheel suspension is independent (IFS), that what I am hearing and feeling is the action of the jacks against the tires as they try to settle back on the ground in their normal position relative to the shifting of the suspension. Only happens on the front, not the rear. Is this normal for a IFS setup?

I have not experimented with raising the front up only a little and then let it down to see if it still happens. Will try that too. I have had the DW push the retract button while I was outside looking but could not determine what was making the shudder for sure.

Any experience with this issue?

Thanks
John
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Old 09-17-2013, 12:40 PM   #2
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Have you checked to be sure the jacks are securely bolted in place?
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Old 09-17-2013, 02:24 PM   #3
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Have you checked to be sure the jacks are securely bolted in place?
I have not. I will look today.

John
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Old 09-17-2013, 05:59 PM   #4
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I have not. I will look today.

John
I did check the jack mountings and they are solid and all bolts are tight. Must be some other issue.

John
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Old 09-17-2013, 06:00 PM   #5
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Power Gear recommends using silicone spray. Not WD40. WD40 is bad for rubber and attracts dust.
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Old 09-17-2013, 06:21 PM   #6
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We owned an 01 Marlin 37' model for 4+ years and never experienced the problem you describe. I sprayed the shafts with silicone every 6 months or so and greased the jacks once per year. Not all of the older PG jacks had grease fittings. If yours does, suggest you try adding 1 or 2 squirts of grease as well as the silicone.
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Old 09-18-2013, 08:34 PM   #7
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We owned an 01 Marlin 37' model for 4+ years and never experienced the problem you describe. I sprayed the shafts with silicone every 6 months or so and greased the jacks once per year. Not all of the older PG jacks had grease fittings. If yours does, suggest you try adding 1 or 2 squirts of grease as well as the silicone.
l will check to see if they have a grease fitting. I hope they do as that will likely be the solution. I'll also put silicone on them and wipe off the WD40.

John
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Old 09-18-2013, 08:42 PM   #8
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My power gear jacks will sometimes shudder, and at other times they will retract smoothly. I think they shudder more often when on a site that is not level and the jack is in a bind when beginning to retract.

They've done this for years so I consider it normal.

Fred
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Old 09-18-2013, 08:54 PM   #9
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I wonder if you might have some debris blocking the front hydraulic valve. Small enough that it only causes chatter. Something to consider.

The rams themselves are so simple that if you've been lubing them, even with WD-40 (wrong stuff as has been mentioned), I'd think that the lube would have given you several operations without shuttering.
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Old 09-19-2013, 01:22 AM   #10
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The jacks on my Dolphin did that when I bought it, they don't have grease jerks. I cleaned the outside of the lip seals of each cylinder with a small wire brush, just be gentle. Then I used a new can of silcone spray with the small tube attachment. I worked the small tube under the dust lip of seal of each jack. Got a bunch of gunk out of them, wiped off the gunk ran the jacks to their full extension, sprayed with silicone before retracting. Had to do it a couple of time tell they quit shuddering, now they go out and in smoothly. You need to occasionally run them out to full extension wipe down, spray with silicone, and retract fully. If you are going to store it with the jacks extended, spray the ram with silicone occasionally. Before you retract them wipe them down and spray with silicone. I wouldn't use WD-40, it's good for displacing water as it was originally designed for, Water Displacing formula 40.

Chuck
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Old 09-19-2013, 07:47 PM   #11
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Cool Jack shudder

Just got done with a seminar at the GLAMARAMA FMCA event in Goshen, IN. Definitely give the jacks a couple shots of a quality grease. The only time to use WD40 is if the seal is leaking/weeping. WD causes the rubber seal to swell and may stop the leaking somewhat.....otherwise don't use it for this purpose. Learned there is a big difference in silicone spray quality. The better quality brands have a much higher percentage of silicone in them than the lesser quality brands. If it goes on kind of like a thin slime it is MUCH better than a watery spray. Some jack mfgs. recommend wiping down the shaft with automotive ATF. My Power Gear jacks actually use ATF for the operating fluid. I personally believe that periodic cycling of the jacks is a good thing, even if you are parked for extended (winter) periods of time. I also believe that the more uneven the ground and the longer extension of the jacks can cause a shudder upon retraction. Lower your unit as low as possible and use pads/blocks to eliminate long jack extensions. I had a shudder in my front jack (3 jack system) and it caused the shaft to become galled and not repairable. My experience was $800 later I was good to go again. Your cost for my experience and advice is $0.
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Old 09-19-2013, 10:13 PM   #12
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Originally Posted by cjkroodsma View Post
Just got done with a seminar at the GLAMARAMA FMCA event in Goshen, IN. Definitely give the jacks a couple shots of a quality grease. The only time to use WD40 is if the seal is leaking/weeping. WD causes the rubber seal to swell and may stop the leaking somewhat.....otherwise don't use it for this purpose. Learned there is a big difference in silicone spray quality. The better quality brands have a much higher percentage of silicone in them than the lesser quality brands. If it goes on kind of like a thin slime it is MUCH better than a watery spray. Some jack mfgs. recommend wiping down the shaft with automotive ATF. My Power Gear jacks actually use ATF for the operating fluid. I personally believe that periodic cycling of the jacks is a good thing, even if you are parked for extended (winter) periods of time. I also believe that the more uneven the ground and the longer extension of the jacks can cause a shudder upon retraction. Lower your unit as low as possible and use pads/blocks to eliminate long jack extensions. I had a shudder in my front jack (3 jack system) and it caused the shaft to become galled and not repairable. My experience was $800 later I was good to go again. Your cost for my experience and advice is $0.
Thanks for the replies. I will follow these suggestions and let you know what happened. Got to get some good silicone first. What I have is old and maybe not the best.

John
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