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After a bit of digging around on the inter tubes, I found the Power Packer commercial cab tilt hand pumps for fire and rescue looked oddly similar to the manual pump that is hanging off the side of the M1079.
So I reached out to Power Packer and had a really nice email exchange with Fred, a quality engineer over at Power Packer. I was basically trying to see if one of their pumps would work on our trucks and after the debacle I had with Goodyear over just getting a price on tires, I figured this was going to be another Sisyphean effort to order an OEM part. I sent him some photos and not only did he have a matching pump he sent me the drawings for the original so I could match up the measurements myself to the one I have on the LMTV.
So turns out Enerpac the parent company of Power-Packer made the original hand pumps and cab latches under the Acuant brand. I didn’t know that when I started looking, so that’s a good little bit of info to have.
The only thing he didn’t know was where I could buy one. But he told me to call the front desk number and they would know. So I gave the number a call and they gave me the contact information for a couple of companies in the US that I could buy from.
So I made a call over to Eagle Mark 4 Equipment and got a quote and ordered one. www.eaglemark4.com
HP50034204 HAND PUMP ASSY (PPAC) $195.60 Add tax for your aria
Be aware there is a 2 to 3 week lead time on orders. Mine showed up in 2 weeks.
The pump that I went with was the Non-Air assisted hand pump with the build in raise/lower valve. (HP50034204) If you want the air assisted version the part number is (HP50034204) I did not go with the air assisted unit due to the fact that the power unit hangs off of the front of the pump and will stick out quite a bit, if mounted in the factory location Stewart and Stevenson put the original pump. That and I don’t envision raising the cab all that often to necessitate having air assist. Plus it’s just one more thing to break.
The hydraulic fluid I use is Shell’s AeroShell 41 MIL-PERF5606-H which is what the manufacture recommends and by recommends I mean it will void the warrantee if you use anything else. It is a mineral spirits based hydraulic fluid that will not absorb moisture and doesn’t gel at cold temperatures.
Amazon Affiliate links: - it kicks me a couple of cents when you use the link. :)
Aeroshell 41 for Aircraft - Mineral Hydraulic Fluid [1 Quart] as you probably don’t need a Gallon.
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