'93 Ford E350 - Master cylinder bore size?
Haven't posted here for a while, and I'm not sure anyone can help or not. I will check with some of the more mechanic oriented pages as well, but I think this is somewhat specific to my vehicle being...
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The E-450 has a 14,500 GVWR, while the F-53 GVWR is 17,000 or more pounds, so you DO NOT want to change to a F-53 brake system.
Does your motorhome have rear drums? Someone on Rv.Net wrote in about getting the rear brake pads installed on the wrong sides, so the rear brakes where not working properly.
Spoungy brakes are normally caused by some air in the lines, or a bad flex line on one of the brakes. There normally are flex lines on each front tire, and between the rear axle and the frame, to allow flexibility in bumps, and front tires are longer due to them turning.
I would first have someone purge the brake fluid. Get a quart of Ford motorhome brake fluid. The stuff for the 24,000 GVWR Ford motorhomes has the very highest "wet" boiling point. You want the highest possible wet boiling point, so that if the brakes get warm, and some moisture in the brake fluid boils (it will become really spoungy or the pedal can go all the way to the floor) then you can lose all your brakes - and have to coast to a stop.
You can use a service like Jiffy Lube to flush out the brake fluid. I would supply them with the brake fluid, so that you know it is the highest quality, and highest possible wet boiling point. And it only costs about $15 at Ford to get a quart. Do not use any 'old' brake fluid, that might have been open more than about 3 hours. The brake fluid used at Jiffy Lube is probably been open more than a few hours.
Normally your brakes should be strong enough to stop your RV in about 100 feet.
Good luck!
Fred.
Does your motorhome have rear drums? Someone on Rv.Net wrote in about getting the rear brake pads installed on the wrong sides, so the rear brakes where not working properly.
Spoungy brakes are normally caused by some air in the lines, or a bad flex line on one of the brakes. There normally are flex lines on each front tire, and between the rear axle and the frame, to allow flexibility in bumps, and front tires are longer due to them turning.
I would first have someone purge the brake fluid. Get a quart of Ford motorhome brake fluid. The stuff for the 24,000 GVWR Ford motorhomes has the very highest "wet" boiling point. You want the highest possible wet boiling point, so that if the brakes get warm, and some moisture in the brake fluid boils (it will become really spoungy or the pedal can go all the way to the floor) then you can lose all your brakes - and have to coast to a stop.
You can use a service like Jiffy Lube to flush out the brake fluid. I would supply them with the brake fluid, so that you know it is the highest quality, and highest possible wet boiling point. And it only costs about $15 at Ford to get a quart. Do not use any 'old' brake fluid, that might have been open more than about 3 hours. The brake fluid used at Jiffy Lube is probably been open more than a few hours.
Normally your brakes should be strong enough to stop your RV in about 100 feet.
Good luck!
Fred.
