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Old 10-02-2022, 08:20 PM   #1
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Power Gear Hydraulic Levelers - 7390 LTC

Hey guys! I have a 2001 7390 LTC that has Power Gear hydraulic levelers. This is NOT the automatic kind and I have a total of 4(ea.). My right rear is leaking and I need to either have it rebuilt or replaced.

I crawled up under it and the stickers on my back ones are gone and they are obviously bigger than the front levelers.

I bought the unit used and canít find anything in the box that has all of the documents for the coach.

Does anyone know how to tell or have a clue what it is?
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Old 10-02-2022, 08:46 PM   #2
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Quote:
Originally Posted by Grady2011 View Post
Hey guys! I have a 2001 7390 LTC that has Power Gear hydraulic levelers. This is NOT the automatic kind and I have a total of 4(ea.). My right rear is leaking and I need to either have it rebuilt or replaced.



I crawled up under it and the stickers on my back ones are gone and they are obviously bigger than the front levelers.



I bought the unit used and canít find anything in the box that has all of the documents for the coach.



Does anyone know how to tell or have a clue what it is?

Take it off, cap the lines, and take it to a hydraulic shop to be re-sealed. A good hyd shop should have no problem getting the seals and will probably even have them in stock. They can match the proper parts by measuring the old ones. Hydraulic cylinders are pretty generic.
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Old 10-03-2022, 05:55 AM   #3
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I have the same thing going on with a front jack. Not the first time but this leak is much worst and will require a rebuild. I have been able to spray the shaft with silicone and clean well to stop seeps in the past. The rear jacks have grease irks, may give them a couple pumps of grease but don't over do it. I was told PG jacks cannot be rebuilt. (RV dealer) I don't believe it. Good luck on your fix.
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Old 10-11-2022, 05:37 PM   #4
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Hi,

My 2005 5342 Dolphin also has PG levelers. My front right jack will develop a leak every 2 to 3 years after sitting in storage for a bit. The leak when it leaks is quite profuse.

I though I too would have to have the jack rebuilt. Here is what I have done 3 or 4 times and it works every time to stop the leak.

1) Fully extend the jack and clean with a good de-greaser.
2) Wrap a typical garage shop red rag size around the jacks piston and secure it. I use a tie-wrap to hold the rag in place. The rag must go completely around the piston.
3) I use an old oil can with a trigger for pumping. Fill the oil can with some brake fluid.
4) Using the oil can filled with brake fluid apply a fair amount to the rag.
5) Slide the rag up to the top of the piston.
6) Re-track the jacks. The piston will travel up through the rag picking up some brake fluid and deposit it on the seals. The seals will expand and hopefully stop the leak.
7) Lower the jacks, slide the rag up to the top again, add more brake fluid, then re-track the jacks again. Do this for 3 or 4 times then check to see if the leak has stopped.
8) Remove the rag lubricate the piston with a good dry-lube.

Like I said earlier I have done this many times and each time the leak has completely gone away. I was ready to remove the jack and have it rebuilt when I read that brake fluid will expand the seals. The method of using the rag and tie-wrap (zip tie) I came up with when trying to figure how to apply the brake fluid.

Be careful to keep the brake fluid away from painted surfaces as it can damage paint.

If this does not work you can always have the jack re-built.

Hope this works for you.

~Bill
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Old 10-11-2022, 06:39 PM   #5
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Jack Maintenance

Sorry to hear you jacks are leaking. I gave a 2005 SeaBreeze LX and have had zero issues with my PowerGear system. One of the maintenance things I do to the jacks is I grease them each time I change the oil and grease the rest of the chassis. I also use silicone spray every 4 or five months. Just before I retract them I give them a good spray. I am hoping this has prevented any issues and so far so good.

I agree with pulling it out and taking it to a hydraulic shop. Might also be a good time to change the fluid.
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Old 10-11-2022, 07:37 PM   #6
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Quote:
Originally Posted by Bill WA6YBD View Post
Hi,



My 2005 5342 Dolphin also has PG levelers. My front right jack will develop a leak every 2 to 3 years after sitting in storage for a bit. The leak when it leaks is quite profuse.



I though I too would have to have the jack rebuilt. Here is what I have done 3 or 4 times and it works every time to stop the leak.



1) Fully extend the jack and clean with a good de-greaser.

2) Wrap a typical garage shop red rag size around the jacks piston and secure it. I use a tie-wrap to hold the rag in place. The rag must go completely around the piston.

3) I use an old oil can with a trigger for pumping. Fill the oil can with some brake fluid.

4) Using the oil can filled with brake fluid apply a fair amount to the rag.

5) Slide the rag up to the top of the piston.

6) Re-track the jacks. The piston will travel up through the rag picking up some brake fluid and deposit it on the seals. The seals will expand and hopefully stop the leak.

7) Lower the jacks, slide the rag up to the top again, add more brake fluid, then re-track the jacks again. Do this for 3 or 4 times then check to see if the leak has stopped.

8) Remove the rag lubricate the piston with a good dry-lube.



Like I said earlier I have done this many times and each time the leak has completely gone away. I was ready to remove the jack and have it rebuilt when I read that brake fluid will expand the seals. The method of using the rag and tie-wrap (zip tie) I came up with when trying to figure how to apply the brake fluid.



Be careful to keep the brake fluid away from painted surfaces as it can damage paint.



If this does not work you can always have the jack re-built.



Hope this works for you.



~Bill
Brake fluid will tend to swell the seals and soften them but eventually the leak may become profuse resulting in a very quick loss of fluid. Using brake fluid in automatic transmissions fluid is an old trick to temporarily correct internal leaks in automatic transmissions but only lasted a short time. I have had all 4 of my Jack's rebuilt by a good hydraulic shop.
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