Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 06-19-2011, 04:42 PM   #15
Member
 
Join Date: Jun 2011
Posts: 50
Its weird the auto brake light would come on sometimes when driving and sometimes when parked, when I first bought the mh I thought the auto brake was on when driving it home cause I smelled brakes for a couple of minutes, but it went away, no light came on but when I got it home I noticed the brake light on, maybe it was on all along and just didnt notice it.
So now im going to pull the whole unit, master and hydro, but I really dont think its the master cylinder, something tells me that ill put a new one on and it will do the same thing...pedal goes to floor, the pedel never gets hard even with the engine off.
And im wondering...is the hydro unit supposed to come on even if the key is off? Cause I can put my foot on the brake and hear the electric motor kick on.
__________________

__________________
Krazzykitt is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-19-2011, 05:03 PM   #16
Senior Member
 
She and I's Avatar
 
Damon Owners Club
Ford Super Duty Owner
Join Date: Dec 2010
Posts: 255
Quote:
Originally Posted by Krazzykitt View Post
Its weird the auto brake light would come on sometimes when driving and sometimes when parked, when I first bought the mh I thought the auto brake was on when driving it home cause I smelled brakes for a couple of minutes, but it went away, no light came on but when I got it home I noticed the brake light on, maybe it was on all along and just didnt notice it.
So now im going to pull the whole unit, master and hydro, but I really dont think its the master cylinder, something tells me that ill put a new one on and it will do the same thing...pedal goes to floor, the pedel never gets hard even with the engine off.
And im wondering...is the hydro unit supposed to come on even if the key is off? Cause I can put my foot on the brake and hear the electric motor kick on.
Krazzykitt, Ok lets not start changing parts ...think for a minute...even if you had no hydraulic assist you still should have brakes...not good brakes but a brake pedal feel.the electric motor you hear running is the backup for the hydraulic or hydro assist ,if the engine dies.....If the engine dies you have no power steering .....which feeds the hydro assist with oil to work...the electric motor is supposed to keep fluid flowing.. so you can stop the rv...
Do you have power steering and does it work properly? Is the reservoir full?..cause this is where your brake booster gets the fluid to work..
Richard
__________________

__________________
May the wind be at your back,The sun in your face
And your love by your side!!
USMC 68/74 RVN 69/70. Semper-Fi!
She and I is offline   Reply With Quote
Old 06-19-2011, 05:30 PM   #17
Member
 
Join Date: Jun 2011
Posts: 50
See heres the thing, the power steering works just fine, under the hood theres a power steering reservior, normal size, and next to that is the hydro boost reservior that holds about half gallon of dextron 3, so theres 2 seperate systems, the hydro boost seems to be a stand alone system, is this right?
__________________
Krazzykitt is offline   Reply With Quote
Old 06-19-2011, 05:48 PM   #18
Senior Member
 
jeepfreak's Avatar
 
Join Date: Mar 2003
Location: Home is where we park it
Posts: 417
The hydroboost gets it pressure from the power steering pump. You should see lines going from and to the pump..That is unless john deere used only an eletric pump. When you open the bleeders does the pedal go to the floor? When there closed does the pedal get real hard?
__________________
2007 Allegro 34wa .WH w20 8.1 6speed. Bow tie powered 79 CJ7 or a 2014 Jeep Unlimited Rubicon Toad.
jeepfreak is offline   Reply With Quote
Old 06-19-2011, 05:53 PM   #19
Senior Member
 
She and I's Avatar
 
Damon Owners Club
Ford Super Duty Owner
Join Date: Dec 2010
Posts: 255
Quote:
Originally Posted by Krazzykitt View Post
See heres the thing, the power steering works just fine, under the hood theres a power steering reservior, normal size, and next to that is the hydro boost reservior that holds about half gallon of dextron 3, so theres 2 seperate systems, the hydro boost seems to be a stand alone system, is this right?
Krazzykitt,...........Ok,The brake booster has to have a pump... where does the lines from the reservior go to? the power steering pump ? or does it have its own pump?.....Just so you know I have no manuals for your RV so we are ....as we say! Flying by the seat of our pants.
__________________
May the wind be at your back,The sun in your face
And your love by your side!!
USMC 68/74 RVN 69/70. Semper-Fi!
She and I is offline   Reply With Quote
Old 06-19-2011, 06:32 PM   #20
Member
 
Join Date: Jun 2011
Posts: 50
It looks like it has its own pump. A mechanic I know just told me that if the seal in the hydro boost is blown then its not allowing the rod.to push the master cylinder, therefore no pedal. Does this sound right?
__________________
Krazzykitt is offline   Reply With Quote
Old 06-19-2011, 07:08 PM   #21
Senior Member
 
She and I's Avatar
 
Damon Owners Club
Ford Super Duty Owner
Join Date: Dec 2010
Posts: 255
Quote:
Originally Posted by Krazzykitt View Post
It looks like it has its own pump. A mechanic I know just told me that if the seal in the hydro boost is blown then its not allowing the rod.to push the master cylinder, therefore no pedal. Does this sound right?
Hey Krazzykitt.........But you still should have brakes ...even if the booster or pump quit working.....Back up a little.. you said the brakes worked but you smelled burning brakes..and the brake light was on....that was maybe the parking brake burning as you drove, the park brake is hydraulic released and spring applied........Try this fill the hydraulic tank and open the bleeder on the emergency brake.. and try to bleed the hydraulic system.. see if you have air in the system.........(But I think you still have air in the brake fluid side of the system)...you should have brake pedal... maybe hard to press the pedal... but a brake pedal.

Not to add more to think about... but there are recalls on the auto brake lines for your JD chassis. You need to yahoo.. JD rv chassis auto brake recall.......
Richard
__________________
May the wind be at your back,The sun in your face
And your love by your side!!
USMC 68/74 RVN 69/70. Semper-Fi!
She and I is offline   Reply With Quote
Old 06-19-2011, 07:20 PM   #22
Member
 
Join Date: Jun 2011
Posts: 50
This all started because the front brakes were dragging, has anyone ever had a problem with the propertional valve going bad? Im throwing a lot out there but my brakes dont work, maybe thats why I got the mh so cheep, lol. So heres what I got, started with front brakes dragging...only after driving for 10 min or so... Went to bleed system, had pressure first few pumps then the seal went out on hydro boost, now no brakes...
__________________
Krazzykitt is offline   Reply With Quote
Old 06-19-2011, 07:21 PM   #23
Senior Member
 
Ford Super Duty Owner
Join Date: Jan 2011
Location: Kitts Hill, OH
Posts: 1,863
Quote:
Originally Posted by Krazzykitt View Post
......Heres the story, over the last couple of weeks when I would drive it short distances the brakes would start dragging, the peddle would get hard and it would get to the point where id have to stop, when the brakes are cold they work fine........
I have seen this part before. there are 2 possiblitys.

1 has anyone done any exh work lately?? I have seen cars where a new pipes have heated the brake fluid to the point of pressureizing it and that applys the brakes slightly make the problem worse.

2 with the age of the vehicle one or more of the flexable brake hoses may have gone soft inside. this can sometimes lead a hose acting like a check valve and holding pressure on a caliper.
This can also lead to makeing it hard to get anything out of the lines.
__________________
(RVM#26) THE U-RV 94 F-700/24 foot U-haul box home built RV
Mekanic is offline   Reply With Quote
Old 06-20-2011, 12:12 AM   #24
Senior Member
 
Join Date: Apr 2010
Posts: 689
If wrong fluid was used then i question the effect of it on the seals/rubber parts of the system. Suspect there could already be damage exsisting
__________________
RVhauler is offline   Reply With Quote
Old 06-20-2011, 01:36 AM   #25
Member
 
Join Date: Jun 2011
Posts: 50
I just read about electric assist brakes, someone was having problems with their mh brakes and apparently john deere used the electric assist in the late 80s, so now im more confused. So I have electric assist brakes? there is an electric unit by the master cylinder, even if the key is off and u press the brake u can hear the electric motor kick on. Ive never heard of electric assist, can someone confirm this?
__________________
Krazzykitt is offline   Reply With Quote
Old 06-20-2011, 01:41 AM   #26
Member
 
Join Date: Jun 2011
Posts: 50
So is all that hydraulic fluid must be for the auto parking brake? Im lost...
__________________
Krazzykitt is offline   Reply With Quote
Old 06-20-2011, 05:58 AM   #27
Senior Member
 
She and I's Avatar
 
Damon Owners Club
Ford Super Duty Owner
Join Date: Dec 2010
Posts: 255
Krazzykitt, Maybe this will help....Please note even if the booster fails you still should have brakes!...As said before you still have air or other problems on the dot3 side .....but check this out SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS Recall for 1988 RV1200 JOHN DEERE Auto Recalls - Justia Car & Truck Recalls
Richard
__________________
May the wind be at your back,The sun in your face
And your love by your side!!
USMC 68/74 RVN 69/70. Semper-Fi!
She and I is offline   Reply With Quote
Old 06-20-2011, 06:09 AM   #28
Senior Member
 
She and I's Avatar
 
Damon Owners Club
Ford Super Duty Owner
Join Date: Dec 2010
Posts: 255
This may also help
Operation, Diagnosis and Repair of Hydro-Boost Power Assist Systems
Richard
__________________

__________________
May the wind be at your back,The sun in your face
And your love by your side!!
USMC 68/74 RVN 69/70. Semper-Fi!
She and I is offline   Reply With Quote
Reply

Tags
brakes



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
The Latest News About Bosch Brakes DriVer Workhorse and Chevrolet Chassis Motorhome Forum 140 05-16-2010 05:32 PM
Technical Report #2 - Bosch Brakes DriVer Workhorse and Chevrolet Chassis Motorhome Forum 77 02-19-2010 03:54 PM
Front Air Disk Brakes Now Standard on FCCC RDPs DriVer RV Industry Press 0 12-05-2009 12:17 PM
My History of Brake Fluid & Brakes Petro Workhorse and Chevrolet Chassis Motorhome Forum 15 11-28-2008 05:29 PM
Aux brakes with a tow dolly mrschwarz Toads and Motorhome Related Towing 23 08-06-2006 04:07 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:21 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.