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| | | | Joined: Dec 2003 Posts: 2,733 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 2,733 | 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. | | |
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