The Stovebolt Site Forums The Parking Lot Big Bolts Galion Hoist Rebuild

I finished up rebuilding my Galion Hoist today.

Heres all the pictures of the tear down and rebuild.

The lid of the hydraulic cannister has a 2 3/4" nut that screws down over the arm, compressing 6 rings of packing material that seal the arm. I had to loosen it with a chisel but I made/cut a wrench out of 3/8" steel to reinstall. Theres one huge o-ring in the lid that seals up the area around it (6" x 6 1/4" x 1/8").

The bottom end of the arm has 6 huge piston rings in it. These were all in good shape so im not replacing them, I would have switched over to a set of o-rings had they been damaged. The bottom end of the unit where the PTO hooks to it, is held on with 2 huge banjo bolts with copper crush gaskets between the individual parts. One of them has an o-ring on it (1 1/8" x 1 3/8" x 1/8") and has a spring and ball check valve inside of it. I broke my vice trying to get the hex plug out of the end of it, so itll be cleaned and left alone as the ball has no wear marks or scoring on it.

Next was pulling the housing apart. There were 4 needle bearings (Torrington B-1314) that the geared shafts sit in. A goofy looking thrust washer on each side of the gears. On the outside were 2 - 1 1/4" snap rings that when pulled allowed the outside bushings, v-ring seals (4 on each side 13/16" x 1 5/16", plus 2 male v-rings at the same size), machine bushings, springs and bearings to be removed. The valve and lever that sits between the cylinder and the gear housing has a small shaft and 2 end pieces that use 2 - 1 1/8" x 1 3/8" x 1/8" o-rings and 2 - 11/16" x 7/8" x 3/32" o-rings, held in place by 1 5/16" internal snap rings.

I made a gasket to fit between the two halves of the gear housing and reassembled. I used a graphite packing material and cut several lengths to fit around the piston arm. My homemade wrench worked pretty good at tightening the big 2 3/4" nut to compress the packing. Dont make the same mistake I did and use 1/4" packing, 3/16" is ideal, it sure doesnt squish trying to get it in place...

Im almost done, all thats left is getting the frame, arm and pivot bars derusted and painted.

Jeff

looks good, thats quite a delicate job keeping the seals in place without nicking them. we had a dempster truck where i use to work with a similar type cylinder.
i wonder if this GALION company was the same one that made wheel loaders years ago?
what truck does the lift go on??

It is critical that the wear plates or thrust washers as you call them be clean, wear free and installed with the proper clearance or the pump will not develop any pressure. These should be bronze faced steel plates. Oil will slip past the gears if too loose and the wear plates will score on the gears if too tight and lock up the pump, ruining it. Also important that the check valve be re-assembled in the proper manner. The "arm" as you refer to it is the piston rod, the "cannister" is the cylinder barrel, the 'lid" is the cylinder head and don't be surprised if the rope packing you used leaks. you claim a 6" cylinder head seal but I'd expect this to be a 7" diameter cylinder with approx 15" stroke. Six inch cylinders were not generally made in twin arm design unless twin cylinders were used.

For whats its worth this type hoist is known as an underbody twin arm and it torque curve is at it's highest at the initial push and drops off pretty fast as it goes up. From the look of the pump I can tell it's pretty old as the manifold style attachemnt went out in the 60's.

The Galion Road Machinery Co. made the loaders and other stuff.
This hoist was manufactured in Galion, OH by the Galion Body Company, long extinct but the survivor company still exists as a brand name only.

Good Luck on your rebuild and KEEP IT CLEAN and use fresh hydraulic oil.

Dave Im about as anal as it comes when rebuilding anything with moving parts. The thrust plates are steel with a bronze face, and they do show some wear. It should only be roughly within a few thousands of an inch total and with the viscosity of the fluid I think it will be fine. If not it will be off to the machinist!

It is a 6" cylinder. All the measurements and sizes of O and V rings are accurate. I made certain so that if anyone else has this model and needs them, hopefully it will make their life easier.

Does twin arm refer to the triangular lift arms? Does the packing material typically leak or should I have used a different type?

Thanks, Jeff