Go Back   iRV2 Forums > MOTORHOME FORUMS > Toads and Motorhome Related Towing
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-08-2015, 08:39 PM   #1
Moderator Emeritus
 
smlranger's Avatar


 
Country Coach Owners Club
Freightliner Owners Club
Join Date: Sep 2004
Location: Glen Allen, VA
Posts: 7,261
Blog Entries: 1
Air Force One inoperative

I installed the AF1 on my 2014 F150 in January and just finally had time to use the coach for a spur of the moment trip today. I could not get the AF1 to depress the brake pedal. I've checked all the obvious things such as the fuse, all wiring, the air line from the coach to the truck, air line connection at the cylinder that pulls on the brake pedal. In fact, if I pull the break away switch plug, the AF1 pulls the brake pedal down hard as expected. That would suggest the unit is getting air from the coach to fill the little reservoir.

I would suspect some issue with the air supply from the coach but I also have an AF1 on my CRV and towed it about one month ago and it worked fine.

I am wondering if there might be some problem internal to the control box. Any suggestions are appreciated.
__________________

__________________
'07 Country Coach Allure 470 Siskiyou Summit #31578, Cummins ISL 425; 2014 Ford F150 toad; Air Force One Toad Brake.
Glen Allen, VA; Smith Mountain Lake, VA.
smlranger 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 04-08-2015, 08:58 PM   #2
Senior Member
 
Jim_L's Avatar
 
Join Date: Jan 2006
Location: Indianapolis
Posts: 234
I had a similar experience. Installed the unit on my CRV and just this week, finally installed the coach portion. I couldn't get the brake pedal to depress and immediately worried that I hooked things up wrong. I called SMI to trouble shoot and the process of troubleshooting included unhooking lines beginning at the hitch, then at the AF1 unit itself. It was determined that the unit was installed in the coach and the CRV correctly and then I found that the line coming out of the AF1 box (I believe it was the red terminal) had very little pressure. SMI concluded that something was wrong inside the box and requested that I send it to them. Yesterday, they called to say they found the issue, fixed it and was sending it back. It appears that one of the hoses inside the box somehow disconnected.

I would suggest that you troubleshoot similarly and if necessary, unscrew the lid and take a look inside for a disconnected hose. Sure sounds like the same issue to me and it can't hurt.
__________________

__________________
2014 Newmar DSDP 4018-450
Jim_L is offline   Reply With Quote
Old 04-08-2015, 09:08 PM   #3
Senior Member
 
Tiffin Owners Club
Freightliner Owners Club
Join Date: Aug 2014
Posts: 1,845
Do you have a helper to apply coach brakes while you check the toad?
Two things to check. Does the AF1 generate vacuum for the toad brake system?
The air line connectors have a push - to - release color, so you can remove each line to check that you get pressure or vacuum.
There is a venturi vacuum device which generates t he vacuum, you should hear the hiss when Coach brakes are applied.

Darn, it is such a simple system. +1 on removing the lid and checking connections. Pretty simple inside.
could also connect the air line to the CRV to confirm coach side is good.

Dan
__________________
2014 40QBH Phaeton DP Cummins 380HP ISL, Freightliner XC, 2014 Jeep Trailhawk TOAD
Blue Ox Aventa tow bar, SMI Air Force One -South Orange County Ca.
dpinvidic is offline   Reply With Quote
Old 04-08-2015, 09:19 PM   #4
Senior Member
 
Jim_L's Avatar
 
Join Date: Jan 2006
Location: Indianapolis
Posts: 234
Quote:
Originally Posted by dpinvidic View Post
Do you have a helper to apply coach brakes while you check the toad?
Two things to check. Does the AF1 generate vacuum for the toad brake system?
The air line connectors have a push - to - release color, so you can remove each line to check that you get pressure or vacuum.
There is a venturi vacuum device which generates t he vacuum, you should hear the hiss when Coach brakes are applied.

Darn, it is such a simple system. +1 on removing the lid and checking connections. Pretty simple inside.
could also connect the air line to the CRV to confirm coach side is good.

Dan
There should be pressure at all lines. If you disconnect the line at the hitch, there will be pressure as soon as someone steps on the brake. Hook that one back up and go to the blue one at the box...same thing...should be pressure. Then the red one on the box. They unhook the line attached to the cylinder and check to see that there is pressure going to the cylinder. One thing that SMI mentioned and I failed to mention was to ensure there are no kinks or obstructions between the blue line and the cylinder on the brake pedal.
__________________
2014 Newmar DSDP 4018-450
Jim_L is offline   Reply With Quote
Old 04-09-2015, 06:25 AM   #5
Moderator Emeritus
 
smlranger's Avatar


 
Country Coach Owners Club
Freightliner Owners Club
Join Date: Sep 2004
Location: Glen Allen, VA
Posts: 7,261
Blog Entries: 1
There are no kinks in any of the air lines. We drove the first leg of our trip and are visiting family out of town so don't have the CRV with us. We are towing the F150 with a golf car in the bed so I need toad brakes. Sending the unit back to AF1 and waiting days for return is not an option. If I call them and they want me to take the box apart so they can talk me thru a fix, I will do that.

I am sure the air lines/system are all intact since the unit sets the brakes on the toad when you pull the breakaway switch plug. It could only do that if the box has been 'charged' with air from the coach.
__________________
'07 Country Coach Allure 470 Siskiyou Summit #31578, Cummins ISL 425; 2014 Ford F150 toad; Air Force One Toad Brake.
Glen Allen, VA; Smith Mountain Lake, VA.
smlranger is offline   Reply With Quote
Old 04-09-2015, 07:51 AM   #6
Senior Member
 
Jim_L's Avatar
 
Join Date: Jan 2006
Location: Indianapolis
Posts: 234
I don't think the box is sealed. I still think it would be worth a look. There are several air connections inside the box. I understand what you are saying and running out of ideas.
__________________
2014 Newmar DSDP 4018-450
Jim_L is offline   Reply With Quote
Old 04-09-2015, 07:22 PM   #7
Moderator Emeritus
 
smlranger's Avatar


 
Country Coach Owners Club
Freightliner Owners Club
Join Date: Sep 2004
Location: Glen Allen, VA
Posts: 7,261
Blog Entries: 1
Update: Issue Resolved

Talked to SMI and they determined that I had their newest version of the AF1 that needs a special adaptation to my coach connections which are configured for the older version (my other AF1 is vintage 2007). My CRV coach-to-toad connection is the single air line plus a 4 wire flat plug. The new AF1 coach-to-toad connection is the single air line only. For my new AF1 to talk to my coach, I need to add a 4 wire flat plug to the truck; ground to truck frame, tie yellow and brown together, and green to the wire that feeds the LED indicator on the dash of my coach. Easy enough.
__________________
'07 Country Coach Allure 470 Siskiyou Summit #31578, Cummins ISL 425; 2014 Ford F150 toad; Air Force One Toad Brake.
Glen Allen, VA; Smith Mountain Lake, VA.
smlranger is offline   Reply With Quote
Old 04-10-2015, 11:37 PM   #8
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 9,279
I had the old SMI Air Force One with the 4 wire plug. The old style also taps into a brake can and is frowned upon by DOT and Freightliner (my new coach). It hurt to buy another SMI unit, but I really like the new module that is installed on the coach and the elimination of the 4 wire plug. Plus the air tank on the towed has been eliminated. I tested it yesterday and it seems the new unit is more sensitive. I have a light on the dash that illuminates when I step on the brakes. It seems to come on a little sooner.

I did my own install and the new coach module was a lot more work, but a nicer/safer system. I had to weld up a bracket to mount the valve and tank.
__________________
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is offline   Reply With Quote
Old 04-11-2015, 06:17 AM   #9
Moderator Emeritus
 
smlranger's Avatar


 
Country Coach Owners Club
Freightliner Owners Club
Join Date: Sep 2004
Location: Glen Allen, VA
Posts: 7,261
Blog Entries: 1
Quote:
Originally Posted by Dutch Star Don View Post
I had the old SMI Air Force One with the 4 wire plug. The old style also taps into a brake can and is frowned upon by DOT and Freightliner (my new coach). It hurt to buy another SMI unit, but I really like the new module that is installed on the coach and the elimination of the 4 wire plug. Plus the air tank on the towed has been eliminated. I tested it yesterday and it seems the new unit is more sensitive. I have a light on the dash that illuminates when I step on the brakes. It seems to come on a little sooner.

I did my own install and the new coach module was a lot more work, but a nicer/safer system. I had to weld up a bracket to mount the valve and tank.
Don, when I got the Allure and the dealer moved the old AF1 hardware from my Journey to the Allure, they installed the new coach module. However, I still have to use the 4 wire set up since I tow both the CRV with the older version AF1 and the F150 with the newer box. Now that I know the mod I had to make to my F150 install, I should be good to go.
__________________
'07 Country Coach Allure 470 Siskiyou Summit #31578, Cummins ISL 425; 2014 Ford F150 toad; Air Force One Toad Brake.
Glen Allen, VA; Smith Mountain Lake, VA.
smlranger is offline   Reply With Quote
Old 04-11-2015, 09:50 PM   #10
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 9,279
I was going to buy just the new module, but they wanted $400.00. PPL had the whole system for $985 on sale. I decided they made enough changes on both units that I would just buy a new one. Now I have spare parts.....

They also added a backflow preventer to the vacuum hose that goes to the power booster. So now there are two. in the system.
__________________

__________________
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don 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
Air Force 1 proportional pedal operation dpinvidic Toads and Motorhome Related Towing 5 09-24-2014 12:33 AM
Air Force One Question freen03 Toads and Motorhome Related Towing 17 05-31-2014 03:33 PM
Air Cleaner Air Intake/Pick Up Dutch Star Don Newmar Owner's Forum 47 04-21-2014 09:20 PM
Installing an Air Force One JohnCamelot Monaco Owner's Forum 10 02-18-2014 07:25 AM
Air force one braking system Vsilvester Toads and Motorhome Related Towing 11 09-22-2013 05:44 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:08 AM.


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