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| | | | Joined: Oct 2007 Posts: 31 'Bolter | | 'Bolter Joined: Oct 2007 Posts: 31 | Is there a way to replace the transmission driven PTO with an electric motor to drive a hydraulic lift for a 48 2 ton grain bed? | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Why? Are you changing trans'? Most trans that one might change To have PTO's. Another option is to mount the or another pump on the engine with an easily removeable drive belt and extend the lines to the engine compartment.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Jul 2008 Posts: 326 'Bolter | | 'Bolter Joined: Jul 2008 Posts: 326 | You can find electric single and double acting hydraulic pumps on ebay. They are usually 12 volt so you might have an issue recharging the battery, etc.
SimS | | | | | Joined: Jan 2013 Posts: 1,384 Shop Shark | | Shop Shark Joined: Jan 2013 Posts: 1,384 | I did exactly that with the 48 2 ton.
The client insisted on an automatic trans and they don't come with PTO's.
The grain truck lift had to be fitted with an electric motor in order to keep working. The original lift was an "all in one unit" and worked fine so there was no reason to start changing out pumps and valves.
I bought a universal hydraulic pump motor large enough to work, welded a mounting plate on and linked the motor to the pump shaft with double reduction gears. The pump turned too fast for direct drive (most PTO speeds are very low) and that reduced the load on the motor. I attached a switch to the lever that controlled the valve, added a solenoid to power the motor when the control cable was pulled and added a big yellow top secondary battery to power the pump as well as an electric loading winch.
works great. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Does it work adapt as the PTO pump under load?
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Jan 2013 Posts: 1,384 Shop Shark | | Shop Shark Joined: Jan 2013 Posts: 1,384 | The 48 2 ton was designed to be an implement carrier. the bed lifts up to align with loading ramps (22 degrees +/-)and the loading winch pulls the unit up on bed.
It has been tested with a farm tractor about 4500 lbs.
Lifts it just fine.
That was the reason for the gear reduction (about 3:1)
There is always the option adding more reduction. It lifts a little faster than the shaft PTO did, so even if I doubled the reduction it would have a reasonable travel rate. I intend to test it at the max load when I get the truck weighed and calculate how much of the 16000 GVW is left for load. The stock truck could carry 10,000 but the truck has put on about 2k.
FYI the leads from the battery (in the new side pod)to the motor are only 30" long and are 1/0 wire.
Last edited by Jim Sears; 03/21/2016 5:29 AM.
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Jim, thanks for the good explanation. I have an Auto Crane on the bed I plan on putting on my 630 with 5333A trans, have not been able to find a PTO for It so might go with electric like you did. Do you have the specs on the motor you used, and any px of your setup?
Thanks,
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Jan 2013 Posts: 1,384 Shop Shark | | Shop Shark Joined: Jan 2013 Posts: 1,384 | I'll look for the motor specs, It was a reversible flange mounted motor. Reversible because the lift unit had 2 input shafts on the pump so it could mount on a truck with either PTO rotation, and I wasn't sure of the mounting design when bought the motor. Kept my options open. You can look in my album back around page 6. http://s1276.photobucket.com/user/jsdesign2/library/ | | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | Nice install Jim, that looks like my 12,000 pound winch motor... Mike B  | | |
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