Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
Sunline RV Forum
Sunline User Photos

Go Back   Sunline Coach Owner's Club > Technical Forums > Modifications
Click Here to Login

Join Sunline Club Forums Today


Reply
 
Thread Tools Search this Thread Display Modes
Old 05-20-2012, 07:56 AM   #1
Senior Member
 
frank_a's Avatar
 
Join Date: Mar 2011
Location: New York
Posts: 460
SUN #1953
frank_a is an unknown quantity at this point
Brake swap?

We just bought an '83 T-1550 yesterday, and come to find out this morning it has 10 X 1 1/2" brake shoes which are apparently pretty much N/A anymore. (Even though the drum depth is 2" I assume it is still referred to as 1 1/2" to match the shoes?) Help me out here, as I know nothing about electric brakes, but have loads of experience with hydraulic drum brakes.

Is it possible to just switch to 7 X 1 1/4" brakes, or the next size up in 10" brakes, which looks to be 2 1/4"? I'm not sure how to get the brake assembly off, but I'm sure I could figure it out!

This trailer needs very little, but I don't think the brakes work, and would be just as happy with new hub/drums and shoe assemblies. Thanks for any help, advice, suggestions, etc., I appreciate it!

Frank
__________________

__________________
2009 GMC Canyon with factory tow package & new fangled brake controller
2008 Subaru Outback
1983 Sunline T-1550

Image to come as soon as I figure out how to flatten a pic!
frank_a is offline   Reply With Quote
Old 05-20-2012, 07:24 PM   #2
Senior Member
 
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
mainah is an unknown quantity at this point
DEXTER 10" x 1-1/2" Electric Brake Shoe Set #K71-046-00
The lining is not very thick brand new so you may have more lining then you think. I do not believe you'll find drums and hubs any where.
__________________

__________________
mainah is offline   Reply With Quote
Old 05-20-2012, 07:31 PM   #3
Senior Member
 
frank_a's Avatar
 
Join Date: Mar 2011
Location: New York
Posts: 460
SUN #1953
frank_a is an unknown quantity at this point
I found the shoes (can get them from from NAPA too).

So you can't easily swap brake sizes. Have to swap the axle to get modern parts?

Thanks!

Frank
__________________
2009 GMC Canyon with factory tow package & new fangled brake controller
2008 Subaru Outback
1983 Sunline T-1550

Image to come as soon as I figure out how to flatten a pic!
frank_a is offline   Reply With Quote
Old 05-20-2012, 07:43 PM   #4
Moderator
 
Sunline Fan's Avatar
 
Join Date: Dec 2006
Location: Michigan
Posts: 6,155
SUN #123
Sunline Fan is an unknown quantity at this point
Quote:
Originally Posted by frank_a View Post
I found the shoes (can get them from from NAPA too).

So you can't easily swap brake sizes. Have to swap the axle to get modern parts?

Thanks!

Frank
From everything I've heard, yes, you would have to replace the axle in order to swap the brakes. And yes, Kelsey Hayes brake parts are basically impossible to find.

Congrats on your addition!
__________________
2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9473.8 (as of 6/18/21)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR
Sunline Fan is offline   Reply With Quote
Old 05-20-2012, 09:08 PM   #5
Moderator
 
JohnB's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
JohnB is on a distinguished road
Quote:
Originally Posted by frank_a View Post
I found the shoes (can get them from from NAPA too).

So you can't easily swap brake sizes. Have to swap the axle to get modern parts?

Thanks!

Frank
Frank, the spindle is machined to put the brake drum armature in a certain location. This is the face of the drum that the magnet rides on/attracts too. And then there is the inside total space the shoes and the backing plate take up.

Going to 10 x 2 1/4" brakes which are used on the 7,000# GVWR campers have the brake drum out further to to allow the shoes to grip correct and the magnet arm to align with the inside of the brake drum. This conversion will not work as your bearings are machined different on your axle.

Going down to 7 " diameter brakes from 10" diameter brakes is a very large loss in braking power. The bigger the diameter the more powerfully the brake is without getting into special high friction linings and super strong shoe actuators. So this is not really an option either.

What exactly does not work? The shoes mainh linked might be a shoe replacement option if the shoes where the problem. Trust me, brand new electric brake shoes look like heavy wore out auto drum brakes. Do not be expecting heavy 5/16" to 3/8" new linings on these really small electric brakes.

How much lining thickness do you have left now? And heat cracks are considered normal. Dexter says replace when you get to 1/16" or less lining thickness. Not much I know.

Here this may help. The Dexter service manual. Don't worry, the technology of TT drum brakes has not changed much since the 1960's maybe even the 50's so this manual will work for yours. They just came out with self adjusting trailer brakes in the smaller sizes a few year ago.

http://dexteraxle.com/i/u/6149609/f/...anual_1-12.pdf

Hope this helps

John
__________________
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is offline   Reply With Quote
Old 05-21-2012, 06:20 AM   #6
Senior Member
 
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
mainah is an unknown quantity at this point
The Dexter smaller axle does not have removable backing plates so you have to replace the components separately too bad because the bolt on plates can be bought plug and play with every thing all ready installed. This of course also makes it impossible to go to a larger size alone. Unless the brake drums are damaged any auto machine shop should be able to resurface the drums for you.
__________________
mainah is offline   Reply With Quote
Old 05-21-2012, 06:34 AM   #7
Senior Member
 
frank_a's Avatar
 
Join Date: Mar 2011
Location: New York
Posts: 460
SUN #1953
frank_a is an unknown quantity at this point
Here's the deal folks. For now, turn the drums and figure out power. I may be getting power at the magnet, I just don't know, but will before the week is over. My new digitial brake contriller says I'm connected, and reads 6.5 when I hit the brakes with the trailer stationary. I assume that is voltage, but if it is, I don't know what it means. Guess I need to read the instructions...

If I can get this baby working, over time I would like to replace the axle with modern components (and 10" X 2 1/4" brakes), maybe at the same time going to a torsion type axle. I don't know, but that is a ways off if I get the brakes working as is. It would be great to get them working, as I want a new electric/propane water heater more, and then A/C, and then new radial trailer tires on aluminum rims. All in good time.

Thanks for the help guys!

Frank
__________________
2009 GMC Canyon with factory tow package & new fangled brake controller
2008 Subaru Outback
1983 Sunline T-1550

Image to come as soon as I figure out how to flatten a pic!
frank_a is offline   Reply With Quote
Old 05-21-2012, 11:09 AM   #8
Moderator
 
JohnB's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
JohnB is on a distinguished road
Quote:
Originally Posted by frank_a View Post
My new digitial brake contriller says I'm connected, and reads 6.5 when I hit the brakes with the trailer stationary. I assume that is voltage, but if it is, I don't know what it means. Guess I need to read the instructions...


Frank
Check the manual. The 6.5 might be amps and if it is, then you are sending full power to the brakes or somewhere leaking power....

If it is 6.5 volts that is not much and you do not have a lot of brake power.

If the 6.5 is a gain reading, then forgewt the amps and volts as it has nothing to do with them.... your right, read the manual...

I see you are thinking the gas/electric HW heater. I'll type some more tonight, you are going to need a power upgrade...

John
__________________
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is offline   Reply With Quote
Old 05-21-2012, 11:15 AM   #9
Senior Member
 
frank_a's Avatar
 
Join Date: Mar 2011
Location: New York
Posts: 460
SUN #1953
frank_a is an unknown quantity at this point
Just got the instructions out. Says the 6.5 would have been set with the power knob, and is an indication of voltage output to the brakes. I need to read up on this some more...

Frank
__________________
2009 GMC Canyon with factory tow package & new fangled brake controller
2008 Subaru Outback
1983 Sunline T-1550

Image to come as soon as I figure out how to flatten a pic!
frank_a is offline   Reply With Quote
Old 05-21-2012, 12:33 PM   #10
Senior Member
 
Join Date: Jan 2011
Location: Florida
Posts: 1,279
SUN #1830
Jim-Bev-2363 is an unknown quantity at this point
Frank, You can possibly clean everything, reassemble and try again. It might be the crud in the brake that is stopping the shoes from grabbing. That would only mean you used some time, no money, to test the brakes.
__________________
Beverly & Jim
Sebring, Florida
1991 T-2363 Solaris
Jim-Bev-2363 is offline   Reply With Quote
Old 05-21-2012, 12:59 PM   #11
Senior Member
 
frank_a's Avatar
 
Join Date: Mar 2011
Location: New York
Posts: 460
SUN #1953
frank_a is an unknown quantity at this point
Yeah, we'll see Jim. Just read the stuff from the Dexter manual, then the instructions from my brake controller. I think I just need to clean things up a bit, get the multimeter out and check things, then hook up and test it on the road with somebody managing the controller. Thanks!

Frank
__________________
2009 GMC Canyon with factory tow package & new fangled brake controller
2008 Subaru Outback
1983 Sunline T-1550

Image to come as soon as I figure out how to flatten a pic!
frank_a is offline   Reply With Quote
Old 05-21-2012, 01:17 PM   #12
Senior Member
 
Join Date: Jan 2011
Location: Florida
Posts: 1,279
SUN #1830
Jim-Bev-2363 is an unknown quantity at this point
Frank, Is your controller a factory connection? I mean is it plugged into the socket of the factory harness? You might have brakes now but haven't set the controller high enuff to do the job.

With the camper hooked up, and you driving slow, you should be able to adjust the controller to grab when you mash the brake pedal. It doesn't have to be a panic mode stop. It will not hurt anything to drive on a back road somewhere and play with it. Maybe even in some big parking lot. You can keep increasing the setting until you feel the camper grabbing, then back off some.
__________________
Beverly & Jim
Sebring, Florida
1991 T-2363 Solaris
Jim-Bev-2363 is offline   Reply With Quote
Old 05-21-2012, 01:28 PM   #13
Senior Member
 
frank_a's Avatar
 
Join Date: Mar 2011
Location: New York
Posts: 460
SUN #1953
frank_a is an unknown quantity at this point
Yes Jim, my truck came with 2 options - a locking differential and a tow package, so I have a factory 7 pin connector installed in my bumper. The wiring for the brake controller was taped to the top of my steering column, and was a bear to find, and then a bear to tie into, but if nothing else I'm good with electrical wiring and got REAL good connections. I built a long lead from there, and then used slide connectors to tie into the brake controller harness so it's easy to unplug. I thought I had pics of this install from the other day, but can't find it right now. If nothing else, the controller told me it was working!

I think you're right about the test drive. I live on a back road, so that's handy. I do NOT live near any kind of parking lot, big or small. I have some other issues to deal with over the next few days, then (God willing) will get back at it.

Frank
__________________
2009 GMC Canyon with factory tow package & new fangled brake controller
2008 Subaru Outback
1983 Sunline T-1550

Image to come as soon as I figure out how to flatten a pic!
frank_a is offline   Reply With Quote
Old 05-21-2012, 01:33 PM   #14
Senior Member
 
Join Date: Jan 2011
Location: Florida
Posts: 1,279
SUN #1830
Jim-Bev-2363 is an unknown quantity at this point
The controller says it is working but the number shown is adjustable so it might not be sending a strong enuff signal, enuff voltage to the brake. When you get it back together just drive down the road increasing the number until you feel the drag of the brakes.

Good Luck with it.
__________________
Beverly & Jim
Sebring, Florida
1991 T-2363 Solaris
Jim-Bev-2363 is offline   Reply With Quote
Old 05-21-2012, 02:04 PM   #15
Senior Member
 
frank_a's Avatar
 
Join Date: Mar 2011
Location: New York
Posts: 460
SUN #1953
frank_a is an unknown quantity at this point
Thanks Jim, I will do that. I'll keep ya posted.

Frank
__________________
2009 GMC Canyon with factory tow package & new fangled brake controller
2008 Subaru Outback
1983 Sunline T-1550

Image to come as soon as I figure out how to flatten a pic!
frank_a is offline   Reply With Quote
Old 05-21-2012, 04:03 PM   #16
Senior Member
 
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
mainah is an unknown quantity at this point
One sure way is to pull the safety wire for the brakes that should lock them up as long as your trailer battery is good. Just pull the wire and tow it a few feet it should slide the wheels.
__________________
mainah is offline   Reply With Quote
Old 05-22-2012, 05:23 AM   #17
Moderator
 
JohnB's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
JohnB is on a distinguished road
Quote:
Originally Posted by mainah View Post
One sure way is to pull the safety wire for the brakes that should lock them up as long as your trailer battery is good. Just pull the wire and tow it a few feet it should slide the wheels.
Yes this is a good drag test. In 2 to 10 feet going 5 mph you will know a lot. Also to add, unplug the 7 wire cord from the truck 1st before doing this. Some brake controllers do not like the back feed from the TT battery.
__________________
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is offline   Reply With Quote
Old 05-22-2012, 09:22 AM   #18
Senior Member
 
frank_a's Avatar
 
Join Date: Mar 2011
Location: New York
Posts: 460
SUN #1953
frank_a is an unknown quantity at this point
Safety wire for the brakes? What and where is that? I have one on my hydraulic brakes for the boat trailer, but pulling that frees the brake for backing downhill!

Frank
__________________
2009 GMC Canyon with factory tow package & new fangled brake controller
2008 Subaru Outback
1983 Sunline T-1550

Image to come as soon as I figure out how to flatten a pic!
frank_a is offline   Reply With Quote
Old 05-22-2012, 10:46 AM   #19
Senior Member
 
Join Date: Jan 2011
Location: Florida
Posts: 1,279
SUN #1830
Jim-Bev-2363 is an unknown quantity at this point
Frank, There should be a safety switch on your camper tongue, next to the jack. It should have a wire that is supposed to be connected to the tow vehicle. The switch on the tongue where the wire is connected is that they are talking about. Pull that wire and try to move the camper. There should be 12V to that switch from the house battery to give brakes power to stop if the unit becomes disconnected from the TV.
__________________
Beverly & Jim
Sebring, Florida
1991 T-2363 Solaris
Jim-Bev-2363 is offline   Reply With Quote
Old 05-22-2012, 10:56 AM   #20
Moderator
 
JohnB's Avatar
 
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
JohnB is on a distinguished road
Frank,

The switch looks like this. Here is a populaor brand. They are commonly refered to as, Emergency Break Away Switch

Breakaways - Bargman

They are required by law in most states, maybe all, once the trailer weight is over a certian amount. In your case with electric brakes, it is heavy enough to need one. I am fairly sure NYS requires them.

You can see mine here in the pic. The cable hooks to the truck bumper area.


When you pull the cable, (pulls the pin out) it closes the switch and it directly connects the battery on the camper to the trailer brakes to stop a run away trailer that has become detached from a TV.

If yours is missing, they are easy to add. The switch is approx $10 bucks I think.
__________________

__________________
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC

Google Custom Search For Sunline Owners Club
JohnB is offline   Reply With Quote
Reply


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
Tractor Swap JohnB Sunline Community 18 11-29-2010 08:15 PM
brake replacement jpspaz Sunline Slide Room Travel Trailers 11 07-29-2010 03:19 AM
TV Brake Pads DF5.4 Towing and Tow Vehicles 5 05-04-2009 05:53 AM
Speaker swap Divebmbr Modifications 3 05-10-2007 03:57 PM
Swap Shop Moved sunlineclub Announcements, News & Special Events 0 03-28-2007 08:45 AM


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Sunline RV or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 06:17 AM.


×