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Old 05-26-2013, 09:51 AM   #1
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Can push the brake pedal to floor

We have a 2006 Four Winds R 29 E-450 V-10. Brakes seem fine smooth stopping however when in park I can push the pedal to floor. Question is this normal? We are new to Class C RV'ing.
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Old 05-26-2013, 10:41 AM   #2
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It does have a power boost. Turn key on when in Park, you should hear a sound like a motor running. See if the brake feels normal then. Doesn't sound normal. I had a 2000 E-450 and don't know if I ever tried brake when in Park with engine off.
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Old 05-26-2013, 11:08 AM   #3
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Sounds like you may have air in your braking system. You say you have good brakes with engine running. Do they feel spongy or are they solid when you push the pedal with engine running?
With the engine off can you pump the brake pedal and it not go to the floor or get better results after pumping? Brake pedal should never go to the floor with hydraulic brakes, engine running or not.
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Old 05-26-2013, 11:10 AM   #4
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Any time the brake pedal goes to the floor...it ain't good. Number of reasons for this to happen, but will take some looking.

I would not drive it until you get that issue solved.

Ken
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Old 05-26-2013, 11:18 AM   #5
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Quote:
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Sounds like you may have air in your braking system. You say you have good brakes with engine running. Do they feel spongy or are they solid when you push the pedal with engine running?
With the engine off can you pump the brake pedal and it not go to the floor or get better results after pumping? Brake pedal should never go to the floor with hydraulic brakes, engine running or not.
Just reread your post, I thought you had posted " when parked" but you stated " when in park" . As I stated, the pedal should never go to the floor. I think it doesn't when driving is because the rpms are up and the brake booster is assisting.

First thing to check is if you have any new fluid leaks under the vehicle. Then check the brake master cylinder for fluid level, it should be just below the top of the resivour. If you are unfamiliar with where the brake master cylinder is located check your owners manual. Then next step is have a professional mechanic check it for you.

Brakes are nothing to play around with.
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Old 05-26-2013, 05:13 PM   #6
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My f350 does the same thing, when stopped and at an idle in park you can push the pedal to the floor. It doesn't just slam down but if you hold steady pressure on it you can get it to the floor, this is normal for the type of system they use for the power brakes. It works off your power steering pump and at an idle the pump cannot keep up. I don't know if this is the same set up that you have or not, but it sounds like we have the same system.
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Old 05-27-2013, 04:58 AM   #7
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Thanks for the help. The engine was running and in park.
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Old 05-27-2013, 08:10 AM   #8
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Thanks for all the help . With the engine off the break pedal is solid when running it seems not solid the power comes from the power steering pump. The RV brakes when moving take very little pedal pressure to stop the unit so when not moving I am putting a lot of pressure on the system likely enough to activate the ABS and slide the tires.
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Old 05-27-2013, 12:19 PM   #9
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If your ABS system is working correctly you should not be able to lock your brakes up.
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Old 05-27-2013, 12:26 PM   #10
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It is not uncommon to have the pedal go to or close to the floor based on what you are doing. If the engine is off and you pump the pedal a few times and it is hard with minimal travel, then it is likely normal. If it concerns you, I would test drive a similar RV if one is local or have the brakes checked out to make sure.
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Old 05-27-2013, 12:27 PM   #11
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Sounds like a leaking master cylinder to me. An internal leak so it wouldn't show up outside the master cylinder.
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Old 05-27-2013, 05:17 PM   #12
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Originally Posted by jamesrxx951 View Post
It is not uncommon to have the pedal go to or close to the floor based on what you are doing. If the engine is off and you pump the pedal a few times and it is hard with minimal travel, then it is likely normal. If it concerns you, I would test drive a similar RV if one is local or have the brakes checked out to make sure.
Thanks for the reply. I am satisfied there is no problem.
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