why will the jack will not lift under pressure
1637086
One of your pumping pistons isn't re-extending for the next pump and so it's only pumping at half pressure.That's how mine died, I haven't figure out a fix yet.
1637087
One of your pumping pistons isn't re-extending for the next pump and so it's only pumping at half pressure. That's how mine died, I haven't figure out a fix yet.
1665835
Also, I am using a Dewalt 200 psi compressor, so it gives plenty of push. Try it out on a piece of scrap wood first and see if you are getting the proper depth of staple set. If not you may need to get more PSI. There isn't any adjustment....so this may be your sollution to your problem.
401552
Make sure that the legs are out the whole way. If they aren't, it will not raise or lower. Also sometimes you have to lift up a little bit on the vertical bar in order to depress the lift/lower button. Hope this helps.
586061
I assume you mean to have the jack fully extended most of the time and then actually "lower" the jack to raise a platform? I doubt it will do that....I would not think the shaft that moves would have the pulling strength without coming out of the outside cylinder.
398659
David - The 500lb limit is due to the cable "crimps" and bolts used to to "pin" the pulley wheels. The hydraulic jack is rated for 1000lbs. They are low grade strength, not grade 8. I have installed outrigger feet on each side using the original foot to prevent side to side movement once crane is under load (the trouble with one foot). I have raised loads approaching limit with no problems with crane arm in the 500lb position. Like anything though, your feet etc can't be replaced - I watch everything. Mac
1090248
I don't recommend it. The only way I was able to lift the front end of my '04 Accord up high enough to get jack stands under it was by awkwardly lifting each side at the front subframe. This jack just doesn't go high enough to be of much use. It's also really bad quality. I would get a decent floor jack to lift the car, and then of course put jack stands under the reinforced lift points.
962776
I have a HD Ultra classic. It lifts it just fine, just make sure the jack is centered in the right place. If someone sturdies the bike it will move OK, it needs to be on flat concrete surface.
1952120
These jacks are primarily for stabilizing trailers. They do not " jack up" (or down), but rather, their movement is accomplished by turning the screw. I hope I've given you a proper description from which to determine their suitability for your specific need.
1325625
I see no reason why not, once you've got it on the ground it's easy to place. The jack itself doesn't require the user to be strong by any means.
719974
I would not recommend these for anything that can move such as a trailer. This works best on a very stationary lift. Otherwise it can easily flip out from under what it is holding with terrible consequences. I've seen that happen twice already with mine. You'd think we would learn. This is a powerful jack and works great when used very carefully and under the right circumstances. Lifting a vehicle or trailer would be a very bad idea!!
1157577
Make sure it's plugged in and has full power (try another plug maybe?). I tried once pushing it down before it was plugged in and it wouldn't stay down. If you're sure it has power then it's defective.
346816
Make sure safety latch is out. I assume you have tried pushing down On the lift arms. Check and make sure linkage arms are not jammed from over extension. I guess you could also disassemble linkage as far back as necessary to get it down. Bleed oil from hydraulic cylinder and see if the pushrod of the cylinder will lower allowing linkage to lower. That's about all I can think of. It doesn't seem like it should be too difficult to determine the problem. Good luck!
578021
Hi Susan. I suspect it would work as an aftermarket jack provided it is located under a frame member and is rated to support the weight.
1850990
sorry for late response. just saw this in my inbox. it requires the jacks:(
889954
I guess not enough pressure (though mine works on almost no pressure) or somehow defective...maybe return and get a new one.
1577502
It doesn't matter. If you grease it, grit and gravel will stick to it and hasten the self-destruction of the jack screw. It will fail soon enough anyway because of the soft, poorly machined metal that can't handle the weight. My trailer only weighs about 2800 pounds
1946176
The extension of the springs is limited to the distance of the pump jack, the piston in the jack hits it's top, that's it. Ken