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Faunsdale, AL | First check is when it’s dragging, loosen the bleed screw on that final drive housing. That will bleed any minor pressure leakage from the brake valve away and tractor should immediately roll freely.
I had one brake stuck and would slide the duals on that side when I dragged it away from the fuel tank where it happened. Somehow I never thought to try to tow it with engine off just to check. So I chased what I thought was a failed gear or bearing in the final drive….nothing there. So, i replaced brakes on both sides because they were starting to flake off, adjusted the axle bearing preload and put it all back together. When I started it up, it immediately locked brakes up on same side, so I finally realized it was the brake valve and rebuilt that to fix it.
It’s not real common for the brakes to drag because of mechanical problems in the final drive. It is a known problem with some of the 5000 series utility tractors 5420 I have has a definite drag on it when you’re shifting up to get to high. I’ve been into it because of failed axle bearings and even put in new brake disks since they were beginning to flake. It’s the same as it was, so I just live with it. When those tractors first came out there were a bunch of them sold here to run aerators on catfish ponds. I remember they had quite a few of them in the shop for some sort of brake dragging problem but none of our collection of them never had any serious problem with the brakes. We just replaced a lot of axle bearings and seals!
It is relatively common for the linings to fail and clog the suction screen in the bottom of the transmission, but I’ve never seen that result in brakes dragging. Usually just have very limited hydraulic flow until you clean the sump screen. I’ve had a couple tractors that had no linings left and had apparently had the screen cleaned enough that the hydraulics were not affected and went for years like that. Never know what has been done to a used tractor before you bought it! They do make small amounts of metal filings from the steel brake pad backing plates working on rotors etc, but the oil keeps it to a minimum. Certainly doesn’t do the transmission pump any good to pump that stuff!
Edited by ccjersey 9/4/2024 10:21
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Deere 4230 brakes locking up.
