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St. Paul Dump it hoist info
#1361336 Thu May 21 2020 07:28 PM
Joined: Sep 2019
Posts: 8
A
New Guy
I've searched everywhere I can think of for schematics and diagrams for these old dump hoists like what is on my '46 COE but have found nothing. Anybody out there know of a place I could find info on it? It has leaky seals and would like to replace them (I have a place that claims they carry any seal needed) but would like to know what I am looking at before I dismantle this thing! Thank you one and all!


1946 2 ton COE
1957 Cameo
1972 GMC short box 4x4
Re: St. Paul Dump it hoist info
Alaska Jim #1361434 Fri May 22 2020 11:43 AM
Joined: Nov 2011
Posts: 2,573
P
Shop Shark
Hello "Alaska Jim",

I don't know anything about St. Paul hoists, but perhaps your cylinder does not use a seal at all. I resealed my 1941 vintage Hercules dump cylinder with Teflon packing. An example of what I am referring to: https://www.mcmaster.com/ptfe-packing/abrasion-and-chemical-resistant-packing-seals/. Using the packing is exactly like repairing and old style house faucet.

Re: St. Paul Dump it hoist info
Alaska Jim #1361504 Fri May 22 2020 06:30 PM
Joined: Sep 2019
Posts: 8
A
New Guy
Thank you Paul. The cylinder appears to be packing but the control valve is a 7/8" sliding rod that directs the hydraulic fluid and it slides through a seal on each side of the valve body. Those are the seals I was referring to. I appreciate your thoughts though.


1946 2 ton COE
1957 Cameo
1972 GMC short box 4x4
Re: St. Paul Dump it hoist info
Alaska Jim #1363293 Wed Jun 03 2020 02:09 AM
Joined: Feb 2018
Posts: 128
F
Shop Shark
I have a st Paul hoist on my truck. The seal from the pto shaft to the pump leaks. Everything else works fine.

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