Bradbury trolley jack manual

Floor Jack Seal Kit for Floor Jack Seal Kit for , , Product Filters more. The new ram seals are not very pliable. I had to press down on the ram while it was positioned over the hole in the seal. That got it started. Then I could wrestle the seal onto the ram the rest of the way. Third photo --The open portion of the cup-like seal should point toward the bottom of the ram and of the jack. Clean away any gritty pieces of dirt. Coat the new seal with jack oil. Coat the inside of the cylinder with jack oil before inserting the ram.

You should be able to pull the ram up and push it down with your hand. A seal too large in size makes the ram very difficult to install and to move.

Be careful. Never use a hammer on the top end of the ram. On my jack I learned the hard way that it is cast iron and chips will break off of it. First photo --Insert the wire mesh oil filter into the hole from which it came.

Second photo --Clean the tank shell, both on the edges that mate to make a seal and inside. I found quite a bit of dirt inside mine. The dirt had not entered the jack from the outside, but appeared to be residue that had formed from changes in the oil.

I applied some jack oil to the inside of the tank and wiped it with a clean paper towel. I did this several times until I could no longer feel anything gritty with my fingertips.

Third photo --Clean the ram nut. Replace the neoprene seal ring inside the narrower opening. See the left text box. Clean the mating surface where the nut seals with the tank shell. See the right text box. Place the nut over the ram and begin turning it down as far as you can by hand.

Fourth photo --This photo was also used in step 6 to illustrate removal of the nut. Strike on the other side of the arm to tighten. Retrace what you did in step 4, but in reverse, to bolt the bottle jack unit back into the jack's frame. The photo is from that step. While the bolts are still loose, put the handle's yoke in place. I used about 20 ounces of jack fluid. Around 12 ounces was used to fill the jack. The rest was used for cleaning and flushing the bottle jack unit.

Even though the bottles for the jack oil have a pointed end, some spurts out while trying to get the bottle end to the hole, and it makes a mess. Get a funnel with a very narrow end. This is one I made specifically for this job from some sheet metal. I filled the reservoir in small steps.

The jack's release valve was open. Occasionally I pumped the yoke for the handle. When oil was at the level below the plug hole, I pulled the lift arm up and let it fall two or three times. This is to draw oil through the jack. I pumped the yoke between five and ten times to remove any air lock in the check valves. I checked the oil level again a couple of times. Then I returned the reservoir cap. The reservoir cap appears to be open, but actually has a small felt filter inside it.

Update : After using my jack a few times, it tends to throw off extra oil through the felt filter in the reservoir cap. I do not have the original instructions for this jack, so I do not know exactly what the recommended fill level is for it. From what I have read, some jacks are to be filled to the bottom of the hole while the floor jack is level on a floor.

Others vary between just covering the cylinder with oil to slightly below the fill hole. At first I thought I might have a leak, but it was just the jack throwing off extra oil. This extra oil may also be due to the jack evacuating air trapped inside the jack. There are bubbles in the oil vented. One source suggested raising the jack fully and lowering it slowly twenty or so times to remove all air that might be trapped inside the jack's passageways.

Check the oil level to keep it at the desired level. My jack worked as it should immediately. The real test is to lift something heavy with the jack.

I left the jack in this position for a few minutes. It did not leak down that I could see. Now I can use a hammer to tap the metal caps into the holes for the safety overload valve and for the check valves. I will check the fluid level again after I have used the jack several times.

I will also watch for signs of leakage. It is also a good idea to oil or grease all moving parts on the jack now and regularly in the future. Troubleshooting --What do you do if you have rebuilt your jack, but it still does not work under load?

Be certain the oil level is correct. Here are instructions on properly filling a floor jack. The jack could be air locked. This site says to open the release valve and pump the handle rapidly 10 to 15 times in that case. Here is a link to a document on troubleshooting hydraulic systems, like a jack. If necessary, check to be certain all check valve balls were installed properly. Check for leaks. Conclusions --I did not find any clearly damaged seals in my jack, other than cracks in an "O" ring on part of the release valve, but it was a non-critical part.

I did find dirt in the oil. I expect the seals were just old and less efficient. It feels good to have my jack working again, especially since it once belonged to my father. Rebuilding a hydraulic floor jack was much more difficult and a lot more work than I expected from information I had gathered before I began. I found some parts were not as easy to remove as I expected from videos and other helps that I linked earlier in this Instructable, and I had to make several special tools.

I first had to develop those in my mind. Then I had to design them and build them with materials I already had. Fortunately, I have a welder and was able to do that without too much difficulty.

I can easily understand why many suggest a person ought simply buy a cheap jack and replace it with another when it fails. I have a hard time doing that, no matter how much financial sense it might make, That seems like the waste of a good tool containing numerous carefully machined parts.

An imported floor jack comparable in capacity to mine lists for around twice the cost of the parts kit I bought, sometimes even less than twice the cost of the parts kit. I do not know if my Fleet jack will last longer than an import jack. Knowing all I know now, I might suggest flushing out old jack oil every decade and replacing it with fresh, clean fluid.

Even then, I am not sure draining the old fluid and refilling the jack with new fluid would have removed all of the dirt I found.

Some of it was in places that seemed to hold the dirty oil in that particular place. The oil in the reservoir had always appeared clear and clean.

Still, neoprene seals used in hydraulic jacks do harden or crack and will fail to seal properly in time. Owning and using a hydraulic jack is often a necessity. But, it has costs over time. Those costs mean the eventual repair or replacement of a jack. If you choose to repair your jack, you have the option of doing it yourself or of taking it to a shop. If you choose to do it yourself, you will learn a lot, but it may require more of your time and be more difficult than you expected.

If you take it to a shop, there will be a cash outlay that will likely be a fair amount greater than the cost of a new imported jack. Several times I feared I had ruined a vital part on my jack, or was about to do so, simply because I was without knowledge and experience related to rebuilding a floor jack. It is my hope that this Instructable will enable others who wish to do so to rebuild a hydraulic jack with confidence and without some of the near mishaps I experienced.

I wish someone had published this before I began to rebuild my jack. It would have saved me time and trouble. Question 6 months ago. Hi Phil, I'm trying to fix my 3 Ton floor jack. Release valve gear on my jack is worn out. Any suggestions where can I buy this cog wheel?

Answer 6 months ago. I do not know if you intended to attach a photo. I do not see a photo. But, I also do not have any idea where you might get a gear wheel. My suffestion would be to inquire at junk yards or consider trying to make a replacement by hand. I apologize that I cannot be of further help.

Reply 6 months ago. Thank you. That is what I expected you have. I suppose you could also try to collect names of jacks using those gesrs and inquire of them to see if the gears are available as replacement parts. Nice instructible! I'm a hydraulic specialist and I don't think I could explain the procedure as well as you did! Check out IFPS. Reply 8 months ago. It was made around I just did NOT check the turns for the check valve and safety overload valve and a 3rd one???

An acknowledgement of the source would be most welcome. However, please do not twist any of the information. Where I say along the lines: 'May be for car X' please make this clear in your advert. An altered statement saying: 'It is for car X' will create false facts and misinformation. If you know for certainty a jack's heritage please contact me so that I can amend the entry.

Thank you. Ratchet jack with a saddle jacking plate, raised and lowered by an up and down handle action. The MA has a range of 7. The MA has a range of 6. Jack Handle Type: Last 2 photos, It measures Round bar 0.

Courtesy of Ian Rendle. Year Dates Noted:. Screw Jacks. The Bradbury light car jack is a single screw and comes in 2 sizes. The MA has a range of 9. The MA pictured has a range of 7. Jack Handle Type: Not known. These 2 Bradbury light car jacks are single screw and comes in 2 sizes. The MA and MA are single screw jacks. The pinion spindle is supported by a double bearing, a marked improvement over the single bearing type.

Quick adjustment is provided by the bevel wheel. The MA is 7" closed and The MA is 8" to 14". The MA pictured is a similar single screw jack but with a pegged extension shaft. It is 6. The handle winder is half inch square section. The underside of the jacking point is cast The final photo 6th courtesy of the NewMoody has a different design of base.

Bradbury MA The jack is a single screw. Only other details as shown in the photos. The jack features an overload valve bypass system to prevent jack damage and user injury. Compact design allows use in confined spaces. Easily fits under low vehicles.

It began to leak down a little a few months ago.