Reply
 
Thread Tools Display Modes
Old 04-23-2013, 12:23 PM   #1
Junior Member
 
gmccarth1150's Avatar
 
Join Date: Oct 2012
Location: Plainfield, IL
Posts: 22
OK, here's a brake problem I need help with

I just picked up my new to me Shamrock Hybrid. I took it out to practice backing it up. All went well, but on my way back home I stopped at a red light and one wheel locked up on the TT. Once I unhooked the power to the TT it was OK, but after I hooked the power back up and pressed on the brakes, it locked up again. The dealer is sending me a new brake controller but I don't think that's it. Anyone have any ideas?
__________________

__________________
Garry, Mary, the dog, Binky and the new dog Bourbon.

Life isn't about waiting for the storm to pass, it's about learning to dance in the rain.
gmccarth1150 is offline   Reply With Quote
Old 04-23-2013, 12:36 PM   #2
Phat Phrog Stunt Team
 
AquaMan's Avatar
 
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 6,477
Quote:
Originally Posted by gmccarth1150 View Post
I just picked up my new to me Shamrock Hybrid. I took it out to practice backing it up. All went well, but on my way back home I stopped at a red light and one wheel locked up on the TT. Once I unhooked the power to the TT it was OK, but after I hooked the power back up and pressed on the brakes, it locked up again. The dealer is sending me a new brake controller but I don't think that's it. Anyone have any ideas?
Brake controller would affect both wheels, but it may be that the other wheel is out of adjustment and the brake is being applied, but not locking up. Either way, I would put a meter on the wiring going to each side and check for current. If the non lock up side has constant current(same as lock up side) I would blame the controller (or installation) and adjust the brakes equally.
__________________

__________________
2016 Georgetown 364TS
Nights Camped 2017 - 49
AquaMan is offline   Reply With Quote
Old 04-23-2013, 01:00 PM   #3
Senior Member
 
Join Date: Nov 2012
Location: X
Posts: 2,781
I think the fact that disconnecting the trailer made the wheel unlock says that the controller is bad. If the mechanism in the wheel is at fault, unplugging it wouldn't have freed the wheel. (Could have been a coincidence however.)
__________________
BarryD0706 is offline   Reply With Quote
Old 04-23-2013, 01:09 PM   #4
Phat Phrog Stunt Team
 
AquaMan's Avatar
 
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 6,477
Quote:
Originally Posted by BarryD0706 View Post
I think the fact that disconnecting the trailer made the wheel unlock says that the controller is bad. If the mechanism in the wheel is at fault, unplugging it wouldn't have freed the wheel. (Could have been a coincidence however.)
I agree, but if only one wheel is locking up, and it is the brake controller, there's a problem with the non lockup side of the camper. Either it doesn't have power to the brakes or it's out of adjustment.
__________________
2016 Georgetown 364TS
Nights Camped 2017 - 49
AquaMan is offline   Reply With Quote
Old 04-23-2013, 01:13 PM   #5
Senior Member
 
Join Date: Nov 2012
Location: X
Posts: 2,781
Quote:
Originally Posted by ttrost65 View Post
I agree, but if only one wheel is locking up, and it is the brake controller, there's a problem with the non lockup side of the camper. Either it doesn't have power to the brakes or it's out of adjustment.
And I agree with that. Definitely more things to check into here.
__________________
BarryD0706 is offline   Reply With Quote
Old 04-23-2013, 03:10 PM   #6
Junior Member
 
gmccarth1150's Avatar
 
Join Date: Oct 2012
Location: Plainfield, IL
Posts: 22
Bye the way, there are 4 wheels on the camper, (21ss) and as far as I can tell it's only the one wheel. I've never had to deal with brakes on a TT before, so this is all new to me.
As more of a note, the brakes did feel a bit strange before this happened. I did alot of backing up before it happened, but I don't think that could have been it. Also, I went over a curb before it happend, but again, I don't see how that could effect it either.
Thanks for the input so far, it's given me things to think about. Once I get the new brake controller I'll install it and see what happens.
__________________
Garry, Mary, the dog, Binky and the new dog Bourbon.

Life isn't about waiting for the storm to pass, it's about learning to dance in the rain.
gmccarth1150 is offline   Reply With Quote
Old 04-23-2013, 06:14 PM   #7
Phat Phrog Stunt Team
 
AquaMan's Avatar
 
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 6,477
Makes even more sense that its not the controller. Some of these brakes are automatically adjusted by backing up and applying brakes. Perhaps that one wheel over adjusted, or was even a little tight to start. My recollection is that there is one wire coming from controller for activating all brakes. Why is only one being constantly energized, if it is the controller?
__________________
2016 Georgetown 364TS
Nights Camped 2017 - 49
AquaMan is offline   Reply With Quote
Old 04-24-2013, 07:02 AM   #8
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
I am not sure how your brakes work, but the "generic" electric brake uses an electric magnet to grab onto the rotating part of the wheel. The more you press (up to the maximum gain set in the controller) on the brake pedal causes the controller to increase the voltage to the magnet pucks and increases its grip. This increases the braking force of the lever arm.

Then the rotation of the WHEEL acts ON the lever arm twisting the primary and secondary brake shoes into contact with the drum walls.

Lifting your foot off the brake pedal reduces the voltage being applied to the magnet and it starts slip reducing that brake force.

ONE brake locking up while the other rotates means the SAME voltage is causing more braking force on one wheel than the other.

This can happen for several reasons:

1) Grease on the magnet puck or brake shoes in the "not locking" wheel.
2) Down to metal on the shoes OR the puck in the "non locking" wheel
3) Incorrect brake assembly or broken part
4) So far out of adjustment that the brakes are not touching the drum even at full application in the "non locking" wheel.

I would pull the hubs.
Attached Images
 
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 04-24-2013, 07:27 AM   #9
Member
 
Join Date: Sep 2011
Posts: 42
come on guys it is brand new why would you mess with it take it back to dealer and tell them to fix it
__________________
jkklops is offline   Reply With Quote
Old 04-24-2013, 07:32 AM   #10
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
Quote:
Originally Posted by jkklops View Post
come on guys it is brand new why would you mess with it take it back to dealer and tell them to fix it
Since the dealer is mailing him a brake controller, I assumed it is quite some distance to the dealership. It is also a used trailer ("new to me").

It is quite possible the brakes were assembled/adjusted improperly. NOT something a used camper dealer would check as long as they worked when the break away was pulled. "Locking up" is "working"; so is "just dragging."
__________________

__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Reply

Thread Tools
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



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 04:25 AM.