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Harry Ferguson Tractors Discussion Forum
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Left Brake Pedal TO-30

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glenmorebuckman

11-08-2007 17:46:49




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My left brake pedal doesn't seem to be working right. When I mash it down the brake pedal on the right that works both brakes comes up. Is this how it's supposed to work?




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John(UK)

11-09-2007 07:56:36




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 Re: Left Brake Pedal TO-30 in reply to glenmorebuckman, 11-08-2007 17:46:49  
To check if the linkage on the independent brake pedal is seized, just LIFT each pedal in turn and if it is seized the rod that runs alongside the transmission up to the front of the pedals will bend, so that is the one you need to repair. Don't use heat on the pedal pivots as some have plastic bushes in there and you will melt them. Late tractors have a grease zerk fitted but you can't do it to one that doesn't already have one as you will need to change the pivot bush, using grease or oil will cause it to swell...John

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pojo

11-09-2007 05:12:09




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 Re: Left Brake Pedal TO-30 in reply to glenmorebuckman, 11-08-2007 17:46:49  
This may be hard to explain but I'll give it a try. The adjustable brake rods on each side of the transmission case are connected to a pivoting cam on the brake actuating rod. When the main brake pedal is depressed, the actuating rod rotates upwards expanding the brake shoes. When the individual brake pedals are depressed, the rod rotates downwards, again expanding the brakes shoes. If this pivot point is "frozen", applying presure to any brake pedal will cause the remaining brake pedals to travel in the opposite direction. These pivot points must be free in order for the brakes to work as designed. This can be repaired without taking the breaks apart. The pivoting assembly does have a keyway on the brake actuating rod, loosen the clamp bolt and slide it staight out toward the tire. The pivoting pin rotates in a brass bushing inside the clampped assembly. On my TO-30, 0 dollars in parts to repair, 2 hours on each side to heat and free the seized bushings, having brakes that operate as designed, priceless.

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Don Hooks

11-08-2007 22:20:58




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 Re: Left Brake Pedal TO-30 in reply to glenmorebuckman, 11-08-2007 17:46:49  
In a word: NO.
The pedal on the right side of the transmission should already be "up" whether you are pressing one of the wheel brakes or not. If it comes up it must need adjusting which probably means you should evaluate the condition of the shoes, then, if OK, adjust the shoes in both rear wheels and then adjust the rods connecting the individual wheel brakes to the main pedal. As I just learned here on the forum, the height of the individual wheel pedals is adjusted by loosening the clamp bolt on each. Getting them tight enough again requires some pretty good torque.

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