case 8300 plow

RustyR · Apr 13, 2014

I have this 4 18s case plow with the nitrogen resets. Every year it breaks off a steel nipple or two where the nipple meets the pressure cylinder. Usually happens when that cylinder has had to reset from a rock. Didn"t know if anybody knows of a better nipple or reason why these break off? Might have just been a design flaw.

Donald Lehman · Apr 13, 2014

Two questions. Have you checked the nitrogen accumulater to see if it is set at the correct pressure? Sounds like your accumulator is either very low on nitrogen or completely out. Oliver accumulators were set at around 1350 pounds of nitrogen pressure and I would set the oil side at 1050 to 1150 pounds of pressure for light soils and around 1200 for heavy soils. Never run more pressure on the oil side than on the nitrogen side. Any welding shop that sells gas will have nitrogen and be able to check the pressure.

Have you checked to make sure your hoses to the nipples are not catching on the plow frame as the bottom trips?

Adirondack case guy · Apr 15, 2014

To add to what Don said, I would check all the joints in the tip mechanism, and be sure there is little to no side spoop there. Also the ends of the beams where the cylinder attaches often bent, if accumilator pressures were off, and the 3" pipe nipple would hit the frame and snap off.
If your beam extensions are bent, straighten them, and weld a reinforcement over to the sub frame to keep them from bending again.
Loren, the Acg.

RustyR · Apr 15, 2014

I did find that the beam extensions are bent on the back two cylinder mounts, running the nipple too close to the main frame. Figuring out how to bend that beam back will be the next challenge.

Don-Wi · Apr 15, 2014

What kind of fittings are you using? If using galvanized pipe fittings they're not made for that use. They sell the proper fittings rated for hydraulic pressures right next to the hoses and cylinders at tsc and fleet farm.

Donovan from Wisconsin

Adirondack case guy · Apr 16, 2014

We had a port-a-power that we fitted into the space and push them back, and then welded in a brace. 5/8" bar stock worked well, for the brace.
As stated before; check the nitrogen charge, as Don spec. out for you. That is what bent the beam extensions
The older 3300 series plows had an angle iron that tied all the beam extensions together from the front bottom to the back one, but they were fixed width, and couldn't be reconfigured from 16" to 18"
Loren

case 8300 plow

RustyR

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Donald Lehman

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Adirondack case guy

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