Heavy duty transmission jack

[suther51]

Coments like that make one feel good, till the jack comes up missing. Lol. Looks great, bett there are many more applications than transmissions.
Eric

[Frank S]

Coments like that make one feel good, till the jack comes up missing. Lol. Looks great, bett there are many more applications than transmissions.
Eric

Fortunately where I live our sheriff knows just about everything that goes on He stops by some mornings for coffee and to see what new fangled thing I have come up with.
As far as other uses the jack will be put to lots of uses 1 being that of a lift the wife's riding mower I plan to make a set up to hook under the front or rear to lift it for servicing the blades and such
Another use will be as an elevating work table
Once I finish working on the Mack I have a rear end to change out on a Masda pickup the jack is so strong it can be used to lift the pickup several feet off the ground then I'll put my jack stands under it and use the jack to remove the rear end. Also have to put a clutch in a pickup so it will get used as much as I was hoping to just have another piece of shop art to roll around out of the way.

[suther51]

Having faced the same riding mower ground hugging issue I put a hand crank winch with a pullie at the roof-line of our wood-shed to hoist up the front of the lawn tractor, can put er right back on er haunches. Saves so much time n trouble.
Eric

[Frank S]

Eric I normally use my jib crane with the chine hoist but cannot always get it near the crane so the jack will serve as a good substitute

[suther51]

As the fellow who taught me some blacksmithing said. If it works, it's right.
Eric

[Manitoba Man]

Many years ago when I regularly worked on heavy equipment and trucks I owned a heavy duty transmission jack the other day a friend called me to ask if I could put a clutch and rear main seal in his Mack. I told him sure why not. So he said he would be passing through in a couple of weeks after I hung up the phone I remembered that I don't have a jack any more. No problem I'll Hire my neighbor who lives about a mile away to bring his over. Big problem his is busted he needs to have it repaired. I offered to rebuild the ram for him but he had already taken it to a shop where they have ordered the parts not sure when they will be in or when he will get his jack back. So I decided to just build one.
After looking around I pulled a couple of 4x4 1/4" sq tubes out of my usable scrap pile dug out 4 heavy duty casters 2 rigid and 2 swivel from my storage van then found an 8 ton engine hoist jack. Hauled a piece of 1/2" plate steel out of my scrap pile and 8 lengths of 1" pipe that at one time was a sprinkler system A few feet of 3/4" 1018 cold roll rod for the pivots shafts and a lenght of 1/14" chromed cylinder rod for the pivots and a few set collars that I made up previously and I was all set I had a heavy duty transmission jack the only thing left to do was cut drill and weld all of this together







After welding the 1 " pipes together to make the link arms I needed a weld jig to make sure the ends were parallel and matching lengths
so I already had 1 hole in the 1" thick table I used my mag drill to drill another turning the table into a welding fixture or jig

I mig welded the ends on by welding about an inch inside of the pipes filling with weld

After all the ends were welded on the link arms and cooled I reamed the bores using my #7 tap handle on the tang of the MT#3 shank of a 3/4"

Pre-assembled everything before welding

Just tacked together

Now a fully functional transmission jack

I used KBS rust blast to remove the surface rust and provide a pre paint primer surface

KBS rust blast leaves a zinc coating that can either be brushed off or left in place Since I was out of etching primer I opted to just rub off and loose residue and leave the rest to serve as a primer

Painted with KBS rust seal machinery gray

Another Classic by Frank. Excellent.

[Frank S]

Another Classic by Frank. Excellent.

Since building that transmission jack 6 years ago I have used it to pull 4 or 5 transmissions and have rented it to my mechanic neighbor several times ``Every time he uses his he says something happens to the hyd jack in it. I have replaced the ram on mine once but the one I used to build the jack in the first place was old when I mounted it.