|
|
|
|
| Author |
|
|
Registered
Join Date: Aug 2007
Location: Auckland, New Zealand
Posts: 464
|
Anyone rebuilt their HYdraulic Trolley Jack?
My trolley jack will jack the car up ok but it starts sinking slowly almost as soon as you stop pumping. For that reason I only use it to get the car high enough to put blocks under it.
I'm guessing it just needs new O Rings? I've done some searching on the net and the jacks don't look that difficult to pull apart but I see there are springs and check valves in there too. The jack I've got is an 3T old taiwanese one which is very solid and I'd like to save it if I can. Can anyone tell me in generic laymans terms how to rebuild one? Or do I need to post a pic of it? Thanks |
||
03-18-2010, 12:00 PM
|
|
|
Registered
Join Date: Jul 2001
Location: Lawrenceville GA 30045
Posts: 7,377
|
Take a look on the Garage Journal forum. There are several threads on jack rebuilding.
http://www.garagejournal.com/forum/showthread.php?t=51105&highlight=jack+rebuild
__________________
Mark '83 SC Targa - since 5/5/2001 '06 911 S Aerokit - from 5/2/2016 to 11/14/2018 '11 911 S w/PDK - from 7/2/2021 to ??? |
||
|
03-18-2010, 02:36 PM
|
|
|
Banned
Join Date: Aug 2001
Location: Jacksonville FL
Posts: 50,449
|
I've been told by several people that it is easier to buy a new one than to rebuild one. Jacks are throw away items these days.
|
||
|
03-18-2010, 03:47 PM
|
|
|
Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
|
We have a place here in town that overhauls all sorts of jacks for $75. Done in a few days and like new.
The new POS's that they sell these days are not near the quality of the old versions. Will stick with my old versions and just keep overhauling them. Glad I have 5-6 sitting around! 
__________________
2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
||
|
03-18-2010, 05:48 PM
|
|
|
Registered
Join Date: Jul 2000
Posts: 5,726
|
Like URY said most jacks are throwaway nowadays. Since you pump up OK, the balls & seats in the check valves are OK & the O ring on the pump piston is OK. The V ring on the piston holding the jack up is ptobably shot. The ID of the cylinder probably has a bad spot that tore the ring.
If you can hone the cylinder smooth the jack can be fixed with a kit from the manufacturer, the correct V rings , or a gland to replace the V ribngs with an O ring. UHMWPE is a good material for the gland since it can be split & slid over into the V ring groove & turned with close enough fit to provide a back up for an O ring.
__________________
drew1 wife has 924 turbo |
||
|
03-18-2010, 06:22 PM
|
|
