Revcon Forums

The worldwide owner-to-owner support system for the Revcon Motorcoach
It is currently Mon Nov 20, 2017 3:11 pm

All times are UTC




Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: Disc Brake Conversion
PostPosted: Sat Mar 05, 2016 8:21 pm 
Offline
User avatar

Joined: Sat Feb 13, 2016 6:16 am
Posts: 20
Location: Charlotte, NC
Daveinet wrote:
Probably the most practical modification has been to convert the rear axles to disk brakes. I highly recommend this modification, as the stock brakes are marginal at best. Its not real expensive, and is a direct bolt on upgrade. Because drum brakes depend on the rotation of the drum to activate, this means there is always a delayed response when applying the brake. Disk brakes do not have that delay, and that is often the difference between a moderate hard braking and a sheer panic stop. I never realized the delay was there, until I installed the disk brakes and it went away. Its an amazing difference to be able to stop the coach with confidence.

Could those who have done the conversion point to options available or used?
Are we looking at using new parts (vendors used) or converting using salvage parts?

_________________
Mfg Date 0679
30' Revcon Mid-coach bath/Double Bed LR
VIN RFS279000143 Ser # 9310
454 Quadrajet Dexter Rear Axles Stock Drivetrain
16.5 950x16 x 6
Soon to be 225-75R16 on GMC 8 Lug Wheels


Top
 Profile  
 
PostPosted: Sat Mar 19, 2016 8:24 pm 
Offline
User avatar

Joined: Sat Sep 14, 2013 12:36 am
Posts: 93
Location: IL
I noticed your signature shows your coach as having Dexter axles. Up until 1982, Revcon used Wolverine axles. The difference is recognized by the fact that the Wolverine axles are square, and the Dexter axles are round. So it is worth making sure which axle you really have, before buying the conversion kit. Revcon did some random customization, so anything is possible, but if yours really is Dexter, it would probably be the only one.

The kit I used was this one, only for some reason it is 200+ more than what it was when I bought it. All the kits have gone up in price, but that specific kit went up more than the other ones. I specifically chose the kit with the stainless steel calipers, because stainless is a poor conductor of heat. This reduces the transfer of heat from the pad to the fluid, so the fluid is less likely to boil. Any of the 8K kits would work.
http://www.etrailer.com/Trailer-Brakes/Kodiak/K2HR89DDS.html
The kit is an exact fit and does not require any modifications. You will need to remove the proportioning valve, and just run the lines straight to the calipers. The OEM proportioning valve keeps about 10 PSI of pressure in the lines to hold the pads close to the shoes. This is not needed with disks, and will wear out the disks prematurely. It also screws up the response time.
The only other issue is that you are loosing the emergency brake. In my case, the e-brake never worked anyway, so no loss on loosing it. If you consider the over all safety of the conversion, it is my opinion that safety increase from switching to disc brakes far out weighs the loss of the e-brake.

_________________
Dave

The Flying Fortress
'83 Revcon Prince 31' FWD
502 w/Howell/GM 16197427 ECM/Edelbrock MPFI,Thorley's & Magnaflows,
4L85E 4 speed, KoniFSD,
Yes it is FORSALE

FMCA F298817


Top
 Profile  
 
PostPosted: Wed Mar 08, 2017 6:12 pm 
Offline

Joined: Mon Nov 17, 2014 5:35 am
Posts: 1
Where can I get this conversion kit ? My brakes SUCK.


Top
 Profile  
 
PostPosted: Tue Mar 14, 2017 12:30 pm 
Offline
User avatar

Joined: Sat Sep 14, 2013 12:36 am
Posts: 93
Location: IL
Did you try the link in my post? What year coach do you have?

_________________
Dave

The Flying Fortress
'83 Revcon Prince 31' FWD
502 w/Howell/GM 16197427 ECM/Edelbrock MPFI,Thorley's & Magnaflows,
4L85E 4 speed, KoniFSD,
Yes it is FORSALE

FMCA F298817


Top
 Profile  
 
PostPosted: Thu Jun 15, 2017 5:35 pm 
Offline

Joined: Thu Jun 15, 2017 4:56 pm
Posts: 1
Hi Dave,

Looking at doing this modification, I had a question about your statement regarding the proportion valve.

I see on page 126 from The user guide that the master cylinder has two outputs that go into a combination valve and then three outputs, two going to the front disc brakes and one going to the rear drum brakes.

From this webpage that explains combination valves it shows the the proportion valve part having an input and output.

Am I correct in assuming you are saying to take the brake line that comes out of the master cylinder and directly sending it do the new rear disc brakes? What did you do about the pressure differential switch or does the Revcon not have one?

What do you think of the addition of an inline hydraulic handbrake as an e-brake?

Any insights are appreciated.

Thanks,
Brandon


Top
 Profile  
 
PostPosted: Mon Jun 19, 2017 4:37 am 
Offline
User avatar

Joined: Sat Sep 14, 2013 12:36 am
Posts: 93
Location: IL
Get rid of everything and connect the master cylinder directly to the brakes. hook one line to the front and the other line to the rear. The rears do out brake the fronts slightly, but that doesn't seem to be a bad thing.

There was a pressure differential switch integrated into the proportioning valve, but I have ignored it. Normally when brake lines go, it bursts, so the "early" warning of a light isn't telling you anything you don't already know. I did blow a rear brake line, and the front still worked, so i was still able to get stopped. In reality, the since the front brakes are not applied till the rear sees pressure. If the rea line brakes, the front stop working as well.

_________________
Dave

The Flying Fortress
'83 Revcon Prince 31' FWD
502 w/Howell/GM 16197427 ECM/Edelbrock MPFI,Thorley's & Magnaflows,
4L85E 4 speed, KoniFSD,
Yes it is FORSALE

FMCA F298817


Top
 Profile  
 
PostPosted: Fri Jun 23, 2017 1:49 am 
Offline
User avatar

Joined: Sat Feb 13, 2016 6:16 am
Posts: 20
Location: Charlotte, NC
Dave, thanks for taking the time to contribute your knowledge to the forum.

Would it make sense to convert 1 of the 2 rear axles to disc brakes & use the other for the emergency brake?


Attachments:
Avator 2.jpg
Avator 2.jpg [ 73.18 KiB | Viewed 940 times ]

_________________
Mfg Date 0679
30' Revcon Mid-coach bath/Double Bed LR
VIN RFS279000143 Ser # 9310
454 Quadrajet Dexter Rear Axles Stock Drivetrain
16.5 950x16 x 6
Soon to be 225-75R16 on GMC 8 Lug Wheels
Top
 Profile  
 
PostPosted: Sat Aug 19, 2017 1:13 pm 
Offline
User avatar

Joined: Sat Sep 14, 2013 12:36 am
Posts: 93
Location: IL
Woops, delayed reply - didn't notice this question till now. the answer is no. The difficulty is that drum brakes require about 10 lbs of pressure in the line to keep the brakes in close proximity to the drum. That 10 lbs will wear and potentially overheat the discs. That is why you need to get rid of the proportioning valve. The preload valving for the drums is built into the proportioning valve. If you get rid of the proportioning valve, and still have 1 set of drums, you will have too much peddle travel.

_________________
Dave

The Flying Fortress
'83 Revcon Prince 31' FWD
502 w/Howell/GM 16197427 ECM/Edelbrock MPFI,Thorley's & Magnaflows,
4L85E 4 speed, KoniFSD,
Yes it is FORSALE

FMCA F298817


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group