The Stovebolt Site Forums The Parking Lot Big Bolts Hyd pump service 1950 1.5T dump

Hey all,

The hydraulic pump for the dump bed on my 1950 Chevy 1.5 ton is pretty leaky:

http://hubcap.clemson.edu/~willys/dt-pump-btm.jpg

But it does work. Any thoughts on the rebuildability of these things? Where is the fluid reservoir? Standard Hydraulic fluid or something else? Anyone know what kind of pump or dump bed this is?

A view from the top:

http://hubcap.clemson.edu/~willys/dt-mech-top.jpg

My plan is to make some sort of *very heavy* structure to prop the bed up so I can safely examine & fill everything...

Thanks for any thoughts...

-Dan

Your hoist and pump is an old Perfection. That pump is about 14-15 gpm@1000 rpm as I recall. It uses a standard chevron style packing and newer replacement packing canbe had at any hydraulic repair place or industrial seal house. The cover plate gasket will most likely have to be made from paper or thin vellum. The spool valve has an O ring I think. I used to be a Perfection dealer but I have slept a lot since then.
The hoist model is likely to be a 715 or a 720/7020 which indicates 7" bore x15" stroke, etc. Used on 8-10' dump bodies. 10-14' platform bodies.

If the wear plates show bad condition (grooves, etc) they will be hard to come by as Perfection has been out of business for a long time.

A body safety prop can be made from a piece of heavy wall 2" pipe or 1" x 3" tubing hinge at the bottom to the subframe and notched at the top to fit under the body crossmember. It should be about 26=30" in length.

Dave,

Thanks very much for the response! I'll let the group know what I find when I take it all apart.

-Dan