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Old 10-29-2015, 12:48 PM   #1
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HWH jack hydraulic repair

I have been on a lot of these forums looking for answers for replacing seals on my Minnie HWH leveling systems, most people have had a lot of problems with leaking cylinders. Since I am a curious soul I have decided to cut one up for inspection. I must admit there's not much to these jacks seal wise. I have contacted HWH (who refuse's to seal the seals to me) however I have a micrometer a can find rod wipers, oring's and backing seals on the internet, I am a excellent welder. I will try to send some pictures if any of you are interested. I will install the rebuilt one on my Minnie when its done
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Old 10-29-2015, 09:40 PM   #2
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Any competent hydraulic repair shop should be able to repair the HWH hydraulic jack cylinders. No need to feel captive to HWH.
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Old 10-29-2015, 09:45 PM   #3
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Keep us posted. I took one of mine apart. Hydraulics shop couldn't identify the seals. No amount of googling could find anything that matched. HWH uses LOTS of unique parts, wouldn't surprise me if that included the wiper/seals.
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Old 10-30-2015, 08:12 AM   #4
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I found this image in some HWH training documents. I found it useful.

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Old 10-30-2015, 08:18 AM   #5
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HWH repair update

I do agree with Fleetman, but I try to do all the service work on my rig including HWH repair I do love the ease of a leveling system. I also hate leaks and a wife who constantly reminds me about them. The jack seals have been a challenge the are a bit on the thin side..140 v the standard 160 seal but the bore showed me a little wiggle room. I have seals coming and will test for leaks before installing The O ring and backing seal are no problem and they do all the sealing so it should be fine
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Old 10-30-2015, 08:27 AM   #6
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I wondered if there might be enough room for different seals. I was trying to find the exact seal.

Are your rams 2.0" in diameter?
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Old 10-30-2015, 08:49 AM   #7
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Look for a seal supply house.

We have one local that has everything.

Hand them the clean parts and they sell you the seals that fit.
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Old 11-02-2015, 01:20 PM   #8
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Quote:
Originally Posted by rwhit View Post
I have been on a lot of these forums looking for answers for replacing seals on my Minnie HWH leveling systems, most people have had a lot of problems with leaking cylinders. Since I am a curious soul I have decided to cut one up for inspection. I must admit there's not much to these jacks seal wise. I have contacted HWH (who refuse's to seal the seals to me) however I have a micrometer a can find rod wipers, oring's and backing seals on the internet, I am a excellent welder. I will try to send some pictures if any of you are interested. I will install the rebuilt one on my Minnie when its done
Here are some photos of cylinder apart and with new seals I well weld it soon
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Old 11-02-2015, 01:23 PM   #9
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I don't see pics
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Old 11-04-2015, 08:23 AM   #10
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Would have liked to see your pictures, hopefully you can figure out what happened....
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Old 11-05-2015, 11:14 AM   #11
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Re: pictures

As soon as I figure out how to download them here I will get them out
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Old 11-05-2015, 11:15 AM   #12
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There some pics of inside
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