Click on image for the lowdown. 
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| | | Forums66 Topics128,018 Posts1,055,342 Members48,419 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Jul 2000 Posts: 619 "MONGO" | | "MONGO" Joined: Jul 2000 Posts: 619 | Had a great weekend, this was the first time I've been able to make it back up to the farm since the weekend I got the new big truck (53 6400 Two Ton). We found half way to the farm on the first trip, that the starter wouldn't engage, so we had to pull start the truck with my father in laws old 1/2 ton. So my first plan was to replace the starter with one I had "In Stock" I found that the return spring for the lever that kicks the starter into the ring gear was broken. After I got the new starter on the truck it started right up but I could hear the starter making an odd noise until I pulled the lever and fully disengaged it. Back to my personal bone yard, ahh, a good spring in stock, gotta love it. Now that it was up and running again I made about 5 trips around the barn. Next project, I wanted to see it dump. I picked up a new big push pull cable with a big blue "Muncie PTO" handle on it from a swap meet a month or so ago. I pulled the old broken cable out and discovered that the one I got is about 6 feet too short to reach the hydraulic pump controls. Now to find a longer cable. Now at least I could see how it worked so I had to test the dump (The Previous Owner said it worked great, He didn't lie..) I switched the lever on the pump over and hopped back in the cab and engaged the PTO and up, up, up it went. Passenger Side Dumped Drivers Side Dumped This is the biggest piston I've ever had. The Piston I've heard people refer to a single piston and a double piston setup. Is one better than the other? Is one rated for more? or are the double pistons just smaller? Now that's a big cotter pin... Mega Pin The tag on the Hoist.... Tag Had to run in the house and get everyone to come up and take a look at the truck dumped!!! Then back down and about 10 more trips around the barn and another across the field to the lake on the other side of the farm and back, I still can't quit grinning. Also I finally measured the bed (several people had asked) it's 14ft 7inchs long and 8 foot wide. Ok, off to bed later, MONGO | | | | | Joined: Dec 2002 Posts: 2,548 'Bolter | | 'Bolter Joined: Dec 2002 Posts: 2,548 | K.C., that's a pretty good look'in 'ol dump, you have there. | | | | | Joined: Jan 2005 Posts: 394 Shop Shark | | Shop Shark Joined: Jan 2005 Posts: 394 | everybody needs a dump truck, got to love them. sure better then the shovel, need to get mine fired up and bring in some gravel. good looking truck mongo. have fun..mike j | | | | | Joined: Dec 2003 Posts: 1,144 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,144 | | | | | | Joined: Dec 2003 Posts: 2,733 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 2,733 | My my my, I haven't seen an old Herc underbody in 30 years and I've been in the busness for 38 years. Those things were relics when I started, HA. Well, the bad news is that the Hercules Body Co merged with the Galion Allsteel Body company and became Hercules Galion in the 60's. Then it becam e Peasbody Galion. Then it sold again and became just plain Galion. After that it was McClain Galion and then about a year or two ago it sold to Godwin in NC. It (whats left of it anyway) is in Winesburg, OH and manufacturers dump bodies and hoists. But, these old twin-arm underbody style hoists for a conversion application haven't been used since Hector was a pup. It is a 7" cylinder low pressure,(1000 psi)and used a cast iron gear pump & valve [censored]'y. The were pretty much bullet proof as lonf as you didn't forget to disengage the PTO and take off down the highway. So much for the history lesson.
Now to answer your questions: yes these were made as single acting only, ie, gravity down. There were and still are some twin cylinder underbodies built but not for use as a "conversion" hoist, only as a dump body hoist and are heavier built. The cylinder rod is likely 2-2 1/4" range and I'll bet dollars to donuts that it is not chrome plated. It uses cast iron piston rings for seals, has a cast iron piston and bypasses at the end of stroke back to the pump. Around and around it goes and where it stops...well it stops when the body is lowered. Don't leave the pump run without doing some work, ie, pumping or you can burn up the thrust washers or side plates that seal the gears. These are bronze faced steel. The pump packing is probably a stacked set of leather or rubber seals under compression. Very effective on low pressure system like this. Seals for both the cylinder and pump can easily be found but will likely be more modern materials and frankly, better. The disadvantage of these old girls is that they are very heavy and aren't too stable. A hanging load like clay sticking on one side will turn them over pretty easy. I mean turn the truck over! So be careful and always be on level ground. Another piece of good advaice is to remember that these were made for grain and fertilizer hauling. Not for sand, dirt or gravel. If you dump those products remember NOT to load then too far to the front of the body or it probably won't lift it and would damage the body and/or the truck frame.
So there you have it, the good the bad and the ugly. Happy Haulin Mongo. Oh.....and just to satisfy your curiosity, no..you can't get parts anymore except from the junk yard so don't bend or break the lift arms, cross shaft or cylinder rod. | | |
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