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massey ferguson brakes

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patrick b

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I am helping a few neighbors who just started working on a mf 165.The tractor sat in a field for 10 years.The rear left side brake is seized.All attempts to break it loose have failed,including dragging the machine for quite a long distance.When the tractor is jacked up on that side,there is just a small ammount of play in the wheel,about a half inch bach and forth.Is there a trick that will unseize this brake?Or does it have to come apart?
 
Why are you sure it's the brake and not the transmission? How are the rubber boots around the shifters? If cracked (or missing), then lots of water in the transmission. Especially after 10 years.
 
Sounds like the brakes- if it was the transmission it would be both wheels. The brake expander plates are known for sticking on, or it could be that the brake linings are rusted to the expander plates or the axle housing. I would loosen the adjuster bolt on the axle housing (faces forward towards running board) and try "rocking" the tractor forward and backwards. If that won't work then the axle housing needs to come off- that could be a pain if the brake linings are rusted to the pressure plates. Maybe trying to pull the rubber boot off the brake adjuster rod, and spraying some penetrating oil in there would loosen stuff up- but it would ruin the brake discs. Sounds like they need to be replaced anyways though.

Good Luck,
Richard
 
Hi all,
Gearhead is almost certainly correct in his posting that it is the brakes that are seized. Besides being the only thing that will potentially rust without immersion in water, they can seize on in a short time. The very limited wheel movement is due to the take-up in the epicyclic reduction unit just inside the hub.
Have you checked that the operating arm/s are free? The adjuster pivot bush in the centre of these arms can seize as well. Remove the adjuster nut/s and remove the arm pivot housing.
If the actuator is seized in the 'on' position you might just be able to get a pry bar onto the metal discs to break the rust.
DavidP, south Wales
 
Thanks all,I will take these tips to the guys this weekend and see where we end up.We really do not want to take this apart.
 
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