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Keith, on that year "A" the entire brake housing must be removed from the tractor's main case.. ~To do that remove the two bolts holding the brake assembly to the main case,, then pull the assembly from the tractor,, then invert it so the drive gear is facing up, then loosen the brake adjuster [that's the 7/16" square headed threaded bolt sticking out of the rear of the brake housing [it turns counter clock wise to loosen] [Caution: that adjuster breaks off easily so use plenty of penetrating oil & heat to loosen, use care & don�t twist too hard] ~Once the adjuster bolt is loosened a few turns remove the nut holding the gear on & bump or pry the gear off. Then mount the brake assembly in a vise & turn the drum while pulling the drum shaft out.. You may have to use a lead hammer to bump the threaded end as you turn the drum.. Sometimes you can just turn the entire unit over & using your hands to hold the drum just bump the threaded end of the shaft on the bench or a piece of wood placed on the shop floor.. Those drum & shafts come out pretty easily once the adjuster is backed off.. ~Once apart clean all the rust off of the sliding cam that slides through the hole in the pedal shaft lever [that cam MUST slide freely to allow the brakes to operate correctly].. Then remove that square shanked adjuster bolt from the backing plate & clean the threads so it turns freely in the casting.. Then clean the 2 adjuster pins so they slide in smoothly, make sure the slots aren�t damaged also.. Inspect the cam ends as that sliding cam must be able to allow the shoe rollers to track in their ends without sliding out of alignment or skipping off the sides so look for wear at the roller contact areas. ~Inspect the shoe rollers & pins for wear if wear found replace the rollers & pins.. In a lot of cases those rollers can be turned around so the unworn side then contacts the cam [those rollers MUST track smoothly down the cam tapers to allow the brakes to work correctly].. ~Inspect the springs for being stretched & bent & if the springs seem weak or distorted replace them.. ~When re-assembling use a good quality brake lubricant on all the sliding & moving parts or parts that contact others.. ~Make sure the brake shaft bushings aren�t worn & that the oil drain back holes are open.. ~If the pedal shaft is worn & loose it can be tightened somewhat by adding a thin hardened washer between the pedal & the housing.. ~When all assembled bench test it to be sure both shoes move out freely & together & that the pedal returns correctly.. Then re-install it using a new brake assembly to case gasket.. Any questions just post back or E-Mail.. [email protected] ~
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