ANOTHER Asian Floor Jack Rebuild?

[relic7680]

Attached are pics of my Chinese Michelin 3.5 jack that I picked up a couple years ago at a seized property auction (auto shop went under). I think I have 40 bucks in it not including the oil.

It provided me some decent service under my '89 Burban and '91 3/4 pickup but always tried to dribble out oil on the down stroke through the port on top of the cylinder. I attempted to remedy this by installing a generic rubber plug, but it still leaks out (plug missing when I got it). More recently, the jack has noticeably been slipping under load and dribbling more oil. I'm moving over to MO here at the end of the month and wonder if I should take it and try a rebuild, or just scrap it before I leave. The house I'm moving into doesn't really have good inside work space, but I'll be the foreman at a shop that's going to let me store/wrench on some stuff there.

Is this thing worth going through, and are the any special tools involved? I subscribed to HiBall's excellent thread, but this jack is of a different design. I was considering getting a brand new HW 3 ton when Zoro has their 40% off Christmas sale.....but wanted to look into fixing my China special first. Thanks in advance.

 

[Jeeper]

I think they are worth rebuilding. I just rebuilt a cm 4 ton that has almost the same hydraulic unit. Thead is below. The pump on mine was more complicated and had more parts so you should be in better shape there. A properly sized u-cup and orings should get you there. As far as tools required, I used a 55mm socket and breaker bar to get the tank nut off but a pipe wrench and cheater bar should work. The other trick is matching up oring sizes. Wish you luck and keep us posted on what you do.


http://garagejournal.com/forum/showthread.php?t=168840

 

[EDGAR]

The Michelin G 735 is built by Shinn Fu. Shinn Fu also builds a model G 737 under the Pro Lift name. They both use the same pump. Also, the SHINN FU made Craftman 4 ton uses the same pump. Sears is now selling a new TORIN made 4 ton floor jack that uses a different pump. Also, the Banner B6350 uses the same pump as the G-735, G737.

Below see pictures of the parts breakdown of the Pro Lift G 737. Also check the link below. Shinn Fu might sell a rebuild kit for the G 737 if you dont want to source the seals yourself. Be advised that the pump piston uses a 3mm x 16mm o-ring which may not be readily available in your local hydraulic shop.

http://www.shinnfuamerica.com/ProductDetails/Pro-Lift/Garage_Jacks/G-737/1293

 

[relic7680]

Thanks fellas.......think I'll go ahead with this when I get settled into my new place next month.

 

[luisharley**]

Do anyone have the parts break down of Michelin G375?

 

[EDGAR]

The G-735 uses the same pump as the G-737, as mentioned in post # 3 of this thread.

Parts breakdown in owner's manual below.

http://www.shinnfuamerica.com/Owners Manual/G-737 Professional3-12TonSpeedyLiftGarageJack/2763


The pump piston actually uses a 3mm x 16.5, which is not readily available everywhere but the closest would be the 3mm x 16mm. However, THEORINGSTORE.COM does sell a 3mm x 16.5mm o-ring. Anyway, it is always important to measure the pump piston just to be sure.

http://www.theoringstore.com/index.php?main_page=index&cPath=368_12_46&sort=4a&page=2

http://www.theoringstore.com/index....368_12&zenid=fbe45e0f41b6caa08c0b358deafeb880