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Old 04-22-2013, 03:32 PM   #1
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brake pedal hard to push

I have a 94 chevy chassie made by bayport my brake padel is very hard to push to stop the camper and the brake pads and shoes are good help
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Old 04-22-2013, 03:49 PM   #2
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First I'd try lubricating the pivot points on the brake pedal. If that doesn't help, next I'd think about replacing the master cylinder. If pads and shoes are good and not frozen in place, that's about all that's left except for swollen brake lines, but they generally only cause problems retracting after application of the brakes.
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Old 04-22-2013, 03:50 PM   #3
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I'd have a mechanic check the vacuume assist on the master cylinder.
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Old 04-22-2013, 08:06 PM   #4
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At one time we had a 1991 F350 truck with the diesel engine. It had a separate vacuum pump for the brakes. That pump went out one day and stopping that truck was like stopping a freight train - both feet on the brake pedal, pretty much standing up on the pedal. A new vacuum pump solved the problem.

If yours is run off engine vacuum I'd check all the vacuum lines between the manifold and the brake booster...
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Old 04-22-2013, 08:31 PM   #5
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Old 04-23-2013, 02:11 AM   #6
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Quote:
Originally Posted by gary5cc View Post
I have a 94 chevy chassie made by bayport my brake padel is very hard to push to stop the camper and the brake pads and shoes are good help
i suggest you install stainless steel braided brake lines after checking all the things that others have said in this thread.
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Old 04-23-2013, 10:32 AM   #7
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Chevrolet chassis? You most likely have Hydro-Boost brakes, which use the power steering pump to supply boost pressure, instead of vacuum. Make sure your power steering belt is in good condition and not slipping. Issues with the power steering belt and/or pump can affect braking performance.

If your power steering is sluggish, heavy, or makes the belt squeal, change the belt and get it tightened to spec, then re-test the brakes. Both systems are interrelated.

Once the power steering system is verified in good order, move on through the brake system.
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Old 04-23-2013, 04:26 PM   #8
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Chevrolet chassis? You most likely have Hydro-Boost brakes, which use the power steering pump to supply boost pressure, instead of vacuum. Make sure your power steering belt is in good condition and not slipping. Issues with the power steering belt and/or pump can affect braking performance.

If your power steering is sluggish, heavy, or makes the belt squeal, change the belt and get it tightened to spec, then re-test the brakes. Both systems are interrelated.

Once the power steering system is verified in good order, move on through the brake system.
Yes on this.

I replaced the HB unit, got better but then saw some oil on the inside rear tire. Bad seal, replaced seal and shoes both side, have good brakes now!!
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Old 04-23-2013, 07:51 PM   #9
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Yes on this.

I replaced the HB unit, got better but then saw some oil on the inside rear tire. Bad seal, replaced seal and shoes both side, have good brakes now!!
Yep, HydroBoost can put out some serious pressure -- enough to reveal any other weak spots once the booster operation is up to par!
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Old 04-30-2013, 08:14 AM   #10
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If the OP is saying it takes a lot of pedal pressure to stop the coach, (not just hard to push the pedal), then ours is the same way . (1995 P32) Or it seems to me it takes a lot of foot on the pedal... Driving a truck, I'm used to increased stopping distance,,, but I figure you are on (or past) the limit of safe braking on some of these rv's... Am I wrong ??
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Old 04-30-2013, 08:26 AM   #11
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If the OP is saying it takes a lot of pedal pressure to stop the coach, (not just hard to push the pedal), then ours is the same way . (1995 P32) Or it seems to me it takes a lot of foot on the pedal... Driving a truck, I'm used to increased stopping distance,,, but I figure you are on (or past) the limit of safe braking on some of these rv's... Am I wrong ??
Monkey
I think you're wrong! Brakes are sized for the weight and size of the vehicle, they should still stop you in a safe distance. I've driven many large vehicles and standing on the brakes should make the wheels lock and the tires smoke. Sounds like you've got issues. Could be bad power brakes, glazed linings, air in hydraulic line, etc. I'd get it checked. Stopping can be important.
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