Here are a couple pictures of the hoses and Pump setup. If you look closely, on the top of the piston where the hose connects, there is a threaded plug. I fear that if I take that out, the bed will lose pressure and drop. When the bed is fully down, there isn't much room to access it. I figured I'd put a 6x6 in there in such a way so it can't slip out. That would give me more room to work on it.
87 International S-1754 PTO problems
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Loaderman22, Aug 12, 2019.
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This shows the bed raised as high as it will go right now. The PTO engages & the pump works, but my feeling is, it's low on fluid. The pump leaks, & it loses pressure (verified by dump bed wont stay up) but since there is no tank I am assuming I have to open that plug in the block that sits on the piton as seen in the second picture. Is there a better way? Since it will be used so infrequently, it doesn't make sense to add a tank, just looking to top off the fluid. Any idea what flavor fluid might be in here? The puddle under the pump is black, so that rules out tranny fluid.
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Take picture from bottom of hoist cylinder.
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The oil fill will usually be near the top of the cylinder and should be vented. I dont think that old thing would grype about the fluid, AW32 should work fine.
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Here are pics of the top of the cylinder, that's as far as I can get it to go up. Like I said I am guessing it's lo on fluid. I still have no idea where to put the fluid in.
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Here are some more pictures, I took the plug out on top of the block seen in the lower picture, there was a spring inside, I put some fluid in there til it overflowed, put the plug back in, and got the cylinder to go up a little more. I then took out what looked like a bleeder or a grease zerk (vice grips) up towards where the piston comes out. A little air hiss, so I left it loose. Then tried the lower plug with spring again and got some air, and only a little bit of fluid went in. Piston didn't go up any higher. I can't seem to figure out where the fluid goes in, nor how to get the piston to go any higher...
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I don't see a fill plug, am I missing something? No reservoir tank, no fill on end of cylinder, and can't get fluid to go in the plug at the bottom (pic in last post). Am I supposed to put fluid in the little breather with the vice grips on it?
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Last edited: Nov 24, 2020
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