Well you need to find out where the metal shavings are coming from, The metal screens sit inside the pickup in the resevoir. If there are that many metal shavings it should be easy to find the cause. Your also gonna have to get into the valves account the shavings.
problem with floor jack
- Thread starter street131
- Start date
Well you need to find out where the metal shavings are coming from, The metal screens sit inside the pickup in the resevoir. If there are that many metal shavings it should be easy to find the cause. Your also gonna have to get into the valves account the shavings.
well i nothing in the cylinder assembly looks worn at all, nothing to account for that many shavings. BUT i will tell you that over time, my valves would act weird. When i first got the jack, when you would first hit the valve, the jack would start raising..... NOW i have to have the valve about 3/4ths down and then it would start raising and start squeeling. Tomorrow i will take apart the pumping part of the jack assembly and impect the valves. Can you usually always tell if you have a bad valve or sometimes is it not visually evident?
If your estimate on metal shavings is correct you should be able to find the problem, Valves dont normally go bad but if you get some contaminents (metal shavings) it could cause the ball not to seat properly.
Not really, there is probably some generic write ups but they are generally broad. Hydraulic jack repair is a dying breed, What kind of information are you trying to get?
why i wanted a book is there is just a couple things that im not sure what they are. If i see something, i want to know the purpose and how it works, i dont just want to look at it and not know what it is. On the first picture that i posted, there is four fasteners on the top of the pumping block. 2 flat head, 2 hex. 2 of them have a ball in them and 2 is just a hole. Whats the purpose of the ball? I have a feeling that its to seal off the cylinder part of the whole unit from the pumping block.
Do to the numerous imports and everybody and there brother has there own "quick lift" technology it would be very difficult to detail every model. The so called "valve" is essentially a seat machined into the block and then balls, springs and weights. If you take a picture i can point you in the right direction, i mean its not rocket science. If you need to get into the valve portion, which it sounds like you do, You just need to document how everything came out and keep each valve seperate from the rest.
boilerroom
New member
My floor jack only works when the vent plug is OUT. I purged it 1,000 times, filled the oil three times. The plug popped out one time. You think the check valve or the O ring on the piston is toast? Where to look next? Thank you kindly.
ajchien
Well-known member
What kind of jack do you have? I am guessing that you have a rubber plug in the fill hole of the reservoir?
Having the rubber plug pulled out, and the performance of the jack improves, suggests that your pump piston seal is very weak/bad.
In a sealed reservoir system, a vacuum forms in the reservoir when you pump up the jack. The vacuum fights against the pump piston seal when you try to transfer oil from the reservoir to the main ram cylinder. The amount of vacuum is increased if the reservoir is overfilled. So when you take out the reservoir plug, a weak pump piston seal has no vacuum to fight against during the transfer the of oil through the valves.
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boilerroom
New member
boilerroom
New member
ajchien
Well-known member
The seal (cup) at the end of the piston is the one that is more important in the function of transferring oil. You have one of the smaller “trolley” jacks, I think you’ll have some decisions to make. 1) Depending on the age of the jack, all the seals in the jack may be aging and may be closer to needing replacement, and thus many recommend to do all the seals at once. One of my jacks is an older import jack that I’ve decided to do piecemeal seal replacement on, and I have now taken it apart 3 times in past year because it keeps finding a different seal to leak from each time. 2) The cup at the end of the piston is going to be more difficult to obtain the proper size than the o ring. 3) I am personally biased against that particular style of “trolley” jack, as my personal experiences with them haven’t been very good. You might need to decide how much time/money you’re willing to put into the repair of this particular jack compared to moving on.
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boilerroom
New member
Thanks, AJ, it may be time to put her to sleep then it appears. Thank you very kindly for all of your help...Cheers!
Some of the best tools I have are the ones that others either broke or had gotten worn out and weren't working like when they were new. They give them away or throw them away. I just replace what's needed and clean the tools up, take care of them and they will take care of you.
Could you good sir, help me find anywhere in the US that would have a replacement plunger for a vintage trolly jack? Searching left and right no luck. The shops I have found within the US don't seem to be open and I imagine the pandemic had something to do with it. The only part i could find is in chgina and that will take waaay too long to get here as I need to repair this as soon as possible. I don't know the make or model it's not anywhere on the jack but, I will attach some pictures along with me pointing to the broken part. Any help is appreciated, Thank you in advance. Respectfully crgaille
