54suds
adk mts.
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Joined: 10/21/2002
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how old, model/# Crapi Jack
2021 Chev 6.6 duramax ltz DBL cab,drw,4x/torklift tdn's,
1999 Bigfoot 1011
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TCs_a_lot
Colorado
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Joined: 07/22/2019
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Thanks a lot for posting/saving these pics. I recently had an inner tube drop out of a HJ lift while my camper was on my truck. This disassembly was critical. I was able to determine that a torsion pin had failed! I was able to replace it and reassembled the jack.
Don't usually reply to forums like this, but thanks.
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Blk88GT
Manitoba
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Joined: 04/03/2018
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I just wanted to say thank you to everyone who's contributed in here. One of my jacks locked up on me and I was dreading having to source a new one. With the help of this thread I brought it back to life and it's never worked so good. I found a large amount of rust/corrosion inside that the previous owner neglected to service. Instead, the dealer soaked him for ~500 for a new motor.
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AnEv942
CA
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Joined: 10/10/2003
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One of the pdf files identifies o-ring and lists sizes (if correct model)
01 Ford F250 4x4 DRW Diesel, 01 Elkhorn 9U
Our camper projects page
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dragginbaet
Qualicum
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Joined: 04/07/2019
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Thanks for sharing your Happijack experiences. My jacks have given me grief for a few years; really noisy, non-sychronized lifting and getting stuck. Tried to get professional service this year and all the shops are booked until the end of August. I did recieve great advice from one service provider suggesting the tube and shaft could be rusty. Then I found this forum which led me to a link for taking the jack apart. Genious. I'm on jack#1 and found a shreaded "O" ring hanging on to the screw. Looks like it came from where the screw meets the top of the leg. Can't find details regarding the size of the "O" ring. Any suggestions?
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bigfootford
Fair Oaks, California
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Joined: 12/03/2002
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After 18 years I had to replace my front jacks.. Motors still ok.
I have greased both of them both 2 times over the years.
One jack was clanking really bad... I knew that the guide at the bottom of the jack screw was broken off same as KKeller's. The other, the wafer bearing and washers were gone along with major rust on the inside tube.
I replaced both... Never have had a problem with the rears... I did tear them down about 8 years ago and did the clean and grease...They are the 4100's.
The new jacks I got are 2900lb capacity v/s2500. There is a drain hole at the bottom of the foot and the inside tube is not painted...It looks like galvanized steel. That seems like the only visible difference.
I have not seen any pictures nor info on the new HJ's shown in the previous posts... Quite interesting.
Jim
2000 2500 9.6 Bigfoot,94 F250, Vision 19.5, Mich 245/70XDS2's, Bilstein shocks, air bags/pump, EU2000, PD 9260,Lifeline 100ah, 200W. solar, Morningstar Sunsaver 15A/ display panel, Trimetric, Delorme/laptop, Holux gps rec,led lights, Wave-3 heat.
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d3500ram
Colorado
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Joined: 07/31/2006
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bump
d3500ram wrote:I too saved the OP's first post with pictures in .doc, docx and PDF format for when I did the repair.
...if anyone wants a copy PM me with an e-mail address and I can forward a copy.
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magic43
Brookhaven, Ms.
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Joined: 07/28/2004
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Oh My, this topic bailed me out back in August, 2012. It wasn't a lube problem but it had to be disassembled. This topic gave me the confidence that I needed to tackle the "teardown". Thanks again.
magic43
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LannyV
Pennsylvania
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Joined: 09/14/2005
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Definitely one of the best threads on the Happijac and to be still going 9 years plus shows a need for such a thread. A big thanks to KKeller14K and all the others that have contributed. I had developed a problem with mine and they are only 22 months old. However, my problem turned out to be the motor seized (rusted) between the armature and the permanent magnets, plus the bottom bearing. I took photos as I torn down the motor. I will try to share this with the group. What is the best way to share?
KB3BV
2009 Dodge 3500 Quad Cab Diesel 4x4
2017 Northern Lite 10’2 EX CD SE
Tork Lift Mounts and SuperHitch
22' Grady-White boat with 225 Yamaha
2012 Cam Am Spyder
2014 7x16 Car-Mate Trailer
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bigfootford
Fair Oaks, California
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Joined: 12/03/2002
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5 stars for you! Thanks for the effort..
Jim
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