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Tested Ford 702 Loader with weight. Picture

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Willy-N

08-27-2005 12:14:23

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Tested the Loader today with allmost 1,200 lbs of filled 18.4 x 16.1 Tires and it lifted them up no problem! Then I chained the loader to the back of my Filled Water Truck (19,800 lbs rear axle weight)and tried to lif the rear tires on the tractor. The loader lifted the rear of the truck about 4" but not off the ground. The Rear Tires on the Tractor allmost lifted but the 1,800 psi relief vave in the control went into bypass. Doing a calulation on the Hydraulics with 2- 1 3/4" Cylinders @ 1,800 psi they should lift at least 19,000 lbs so I maxed the Loader out, front end mount held tractor did not lift the rear tires so the test was a good one. Mark H.

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Bern

08-27-2005 22:10:30

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Calculations in reply to Willy-N, 08-27-2005 12:14:23

Might wish to try and run your numbers there again. I come up with 2.4 in2 per cyl, x 1800 PSI gives you 4330 # force out each cylinder, x 2 cylinders makes for 8660 # total. This is the force exiting the cylinders, not the lift capacity of the loader itself.

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Willy-N

08-27-2005 22:57:54

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Re: Calculations in reply to Bern, 08-27-2005 22:10:30

The way I come up with the numbers was to take the Cylinder dimention 1.75"dia. X 3.14 which was wrong to get the square inches that gave me cir. of them. Now I understand why it could not lift the back end of the tractor if the cylinders could only push 8,660 lbs total. I relise there is loss in the cylinder angle and the loader is not rated for 8660 lbs. I also chained the truck to the cross member instead of the tips which put me closer to the cylinder ends for more power and not to over strain the tips. I was testing the cylinders and pump this way along with seeing if it could lift the rear end of the tractor. The pressure relief valve was in the control not the hydraulic pump it is around 2,800 lbs PSI to much for the design of the cylinders. Structialy I feel better about the loader now not bending. Just wanted to know befor a bale was up in the air and it was to late!! The Forks will be supported in 4 places off the tips and up high on the loader arms. the weight of the bale will be 2 ft further forward then the tires were but around the same weight. The way I figure it to lift the rear tires off the ground I would need over 6000 lbs hanging off the tips(around 5 ft center of the front wheels) to do that. Since I have around 4,500 lbs behind the front wheels and 3/4 of that weight is on the rear wheels about 6 ft back from the front wheels. If I was to hang around 1,200 lbs 6ft max center in front of the front wheels, I would still have close to 2800-3200 lbs on the rear tires for traction. So I am not worried about tipping the tractor on level ground and the bale about 1 ft off the ground. Mark H.

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Willy-N PS

08-27-2005 15:19:51

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Re: Tested Ford 702 Loader with weight. Picture in reply to Willy-N, 08-27-2005 12:14:23

The Power Steering did not seem any different with this load on it. I could still steer with one finger and the tires did not even come close to poping and I don't have them up to much pressure either. Mark H.

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