ok this one is a 1983 chevy flatbed dump, it has a harsh hoist sissors lift with a electric over hydraulic dump pump, now the thing is really struggeling to dump, nothing is wrong with the ram, and harsh hoist only services the ram,and the lift assembly, the rest isnt theirs, no name on the unit, which we ordered new with the truck in 1983, i cant find any rebuild stuff for the pump on the innernet,and i really need this truck. anybody found something for theirs? what about converting to a hydraulic pto pump on the transmission like the larger dumps have, cost?
- Thread starter ericlb
- Start date
Does your truck's transmission even have a PTO? Being a 1 ton it probably has a TH400 or 4-speed manual pickup truck transmission, so it won't have a PTO.
If you can't find a name on the hydraulic unit, you are never going to find parts. There is no point in even looking. Your only choice is to buy a new hydraulic unit or try to fit another pump in place. It depends on what you have.
Go to surpluscenterDOTcom and poke around their hydraulics section. See if there's anything that looks like what you have. Order it. Make it work.
You can also hit the local junkyards and see if there's an old dump there with an electric over hydraulic pump that you can cannibalize.
If you can't find a name on the hydraulic unit, you are never going to find parts. There is no point in even looking. Your only choice is to buy a new hydraulic unit or try to fit another pump in place. It depends on what you have.
Go to surpluscenterDOTcom and poke around their hydraulics section. See if there's anything that looks like what you have. Order it. Make it work.
You can also hit the local junkyards and see if there's an old dump there with an electric over hydraulic pump that you can cannibalize.
BTW, if you "really need this truck," now is NOT the time to be fiddle-farting around trying to find the cheapest fix. Time is money, and you are not making money fretting over spending a few dollars to fix your down truck.
If you an live with it, live with it while you shop around, but if it's down, be willing to spend a little more for a more immediate solution.
If you an live with it, live with it while you shop around, but if it's down, be willing to spend a little more for a more immediate solution.
thanks, this truck does have as pto plate on the transmission, which is why im wondering if im good replacing the electric unit or going to a pto unit, i dont intend to ever sell the truck, its worth far more to me than it ever will be to anybody else it runs good, parts are easily available and simple to install
notjustair
Well-known Member
Have you verified that the electric motor is in fact turning like it should? Hydraulic pumps last a good while and unless the thing has been cycled 10 times a day I would start with the electric side.
Steve@Advance
Well-known Member
If you can find a used one the PTO would be a good long term fix. Best if you can find one still intact that you can personally take off, be sure you get everything you'll need. The wrecking yard monkeys don't tend to care about the details.
Buying new would be costly!
Buying new would be costly!
Try this: Free downloadable parts manuals.
If you know your Model # , one of these should be of help.
Doc
Harsh Hoist Parts Manuals
If you know your Model # , one of these should be of help.
Doc
Harsh Hoist Parts Manuals
rustyfarmall
Well-known Member
There is a belt driven pump available. It mounts on the engine, and is driven from the crankshaft pulley. It uses an electric clutch, kind of like an air conditioner compressor. I have limited experience with one of those on a Chevy 1 ton with a roll back flatbed. All I can say is that pump worked very well.
Wheatfarmer
Member
Did you check the oil level? Did you check the oil and see if it was normal color or a lot of foam color. Drain it and refill. If it is foamy heat a glass jar of it in a pan of water. That will tell you if it is air, or water.
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