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This is the hoist set-up on my 55 6500(Rosie). Pics It was originally on a 54 6400 that I got as a package deal years ago with my 55. Its a Heil with the large tag indicating: Class 8, Model #EE366 1715-P1, Serial #237380. Cylinder tag indicating: The Heil Co. BB370-1*, Code G54. I know the G54 is the date code, July 1954, but would like to be able to decipher the rest of the numbers. Does anyone know of a site or have knowledge of this information? Thanks in advance!

I suspect that the Class 8 is a B but the classifications have changed since the 50's so I had best check on that before saying positively. The 1715 does mean something and it indicates a single 7" cylinder w/ a 15" stroke. That would make it a class 20 (B) or perhaps a class 30 with a higher pressure. I can't relate to the model numbers from that era but the P1 likely refers to the pump configuration. Itmay be a single input shaft making it directional or a double input making it bi-rotational.

It is what is commonly known as a twin arm underbody type dump hoist. It is mounted in a subframe of about 5" high. It contains no pressure relief and would only develope the pressure required to start the load. At the end of the stroke it would simply circulate it's fluid. The valve was incorporated into the pump and it didn't require an oil reservoir.


The Heil brand is still with but the Heil Company has been split up and the Body & Hoist Division sold off to TBEI, a MN holding company. I don't know if the model in this form is still made or not. No longer built in Milwaukee but for many years now has been in Tishamingo, MS. Some parts for this model likely still exist.

Class rating is in relation to its lifting capacity,yes?. It is a double input on the pump, not sure why you would want to spin it backward, guess it depends on the configuration of the pto and or cylinder(application). Thanks for the great info.

The double input shafts provide for different PTO rotation as that depends entirely upon the transmission, PTO type and style. The cylinder really has nothing to do with it.