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Michelin jack won't lift a load #4876379
09/23/18 12:32 AM
09/23/18 12:32 AM
Joined: Jan 2013
Posts: 27
Avondale
10WSmuckers Offline OP
10WSmuckers  Offline OP
Joined: Jan 2013
Posts: 27
Avondale
Hi all. I have a 3 1/2 ton Michelin floor jack that has the quick lift feature but it has now rendered itself useless. It will raise and lower itself without any weight on it but anything like a car is out of the question. It will just stay under the car and squeak loudly with every pump. There are 3 screws behind the pump cylinder and I don't want to risk adding more air into what I suspect isn't the oil fill plug. In fact they say "DO NOT ADJUST" around these 3 plugs and this isn't something I want to mess up completely. How can I bleed the air out thoroughly?

Last edited by 10WSmuckers; 09/23/18 12:32 AM.
Re: Michelin jack won't lift a load [Re: 10WSmuckers] #4876420
09/23/18 04:21 AM
09/23/18 04:21 AM
Joined: Oct 2012
Posts: 4,825
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,825
Taiwan
It IS messed up completely. It doesn't work.

How do you imagine you are going to make that worse?

Re: Michelin jack won't lift a load [Re: 10WSmuckers] #4876435
09/23/18 05:35 AM
09/23/18 05:35 AM
Joined: Aug 2018
Posts: 411
NH
wdn Offline
wdn  Offline
Joined: Aug 2018
Posts: 411
NH
Good reason why top brands should never license their brand name to put on other random stuff that is not made by them. I hope my Kubota shop vac holds up.

Re: Michelin jack won't lift a load [Re: 10WSmuckers] #4876453
09/23/18 06:21 AM
09/23/18 06:21 AM
Joined: Jun 2003
Posts: 33,555
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,555
ME
Take it all apart and look for shot o-rings.

Re: Michelin jack won't lift a load [Re: eljefino] #4876469
09/23/18 06:52 AM
09/23/18 06:52 AM
Joined: May 2010
Posts: 9,459
out there
spasm3 Offline
spasm3  Offline
Joined: May 2010
Posts: 9,459
out there
Originally Posted by eljefino
Take it all apart and look for shot o-rings.



You have nothing to lose by doing this. Its shot either way.

I'd watch this and give it a try.



13 elantra 72k 5w30 QSUD
03 chevy avalanche 80k synpwr 5w30
17 mazda cx-5 7300 miles m1 0w30
Re: Michelin jack won't lift a load [Re: 10WSmuckers] #4876503
09/23/18 07:19 AM
09/23/18 07:19 AM
Joined: Apr 2010
Posts: 184
Michigan
jkasch Offline
jkasch  Offline
Joined: Apr 2010
Posts: 184
Michigan
If you haven't yet, try this first.

Bleeding
1. Remove the Cover Plate.
2. Loosen the Fill Screw.
3. Turn the Handle counterclockwise to open the Release Valve.
4. Pump the Handle up and down quickly several times to purge air from the system.
5. Check oil level and add as explained below, if needed.
6. Tighten the Fill Screw and replace the Cover Plate.

Re: Michelin jack won't lift a load [Re: 10WSmuckers] #4876565
09/23/18 08:59 AM
09/23/18 08:59 AM
Joined: Oct 2014
Posts: 12,557
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,557
Idaho
How old is the jack?


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Michelin jack won't lift a load [Re: 10WSmuckers] #4876649
09/23/18 10:26 AM
09/23/18 10:26 AM
Joined: Nov 2006
Posts: 20,562
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,562
MA, Mittelfranken.de
I would even try to fix it, its a cheap Chinese jack with a brand name from a company that doesn't even make jacks. Return it of toss it IMHO.
Jacks can be dangerous if they fail. If it were a good brand I would have the cylinder serviced by the company.


ASE L1, Master. Deutsch Meisterbrief.
Re: Michelin jack won't lift a load [Re: Trav] #4879770
09/26/18 10:30 AM
09/26/18 10:30 AM
Joined: Jun 2014
Posts: 766
Northern Arizona
funflyer Offline
funflyer  Offline
Joined: Jun 2014
Posts: 766
Northern Arizona
Originally Posted by Trav
I would even try to fix it, its a cheap Chinese jack with a brand name from a company that doesn't even make jacks. Return it of toss it IMHO.
Jacks can be dangerous if they fail. If it were a good brand I would have the cylinder serviced by the company.


China can copy and produce hard parts pretty well, it's the rubber compounds they have trouble with. I bought a cheap Chinese jack back in the 80s and within the first year it started to fail/leak, not surprising. So, being an aircraft mechanic, I headed over to see my friend in the hydraulics shop. He fixed me up with new o-rings, seals and backups and that jack is still going strong today. Now, do I trust my life with it? Heck no! I never crawl under a vehicle without jack stands in place and the weight relieved from the jack.


2016 Prius 1.8L
2001 Tacoma 2.4L
1966 GTO 6.5L
2015 Cub Cadet
Honda CT70 (X6)

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