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06-02-2018, 06:07 AM
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#29
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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I will give Ultra rv a call and see what they say.
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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06-02-2018, 03:23 PM
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#30
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Nov 2005
Location: Crestview FLA
Posts: 1,428
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Quote:
Originally Posted by 1stmh
Yikes, thats a lot of money.
Do you think that replacing it is in my future?
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Hard to say, there may be a fix that was not going to work in my case. I had no pressure to the front brakes at all, only to the rear. And yes it was big bucks, but a 90 mile tow ain't cheap at ten bucks a mile. I had no roadside assistance that would tow that far.
__________________
08 Holiday Rambler Vacationer XL 38PLT Workhorse R-26 UFO gas pusher,
2014 Cadillac SRX AWD, SMI Smart Box braking system.
https://myrandomviews.com/
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06-02-2018, 04:11 PM
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#31
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Senior Member
Join Date: Mar 2015
Location: El Paso Texas
Posts: 146
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I replaced mine by myself and this was the price:
HCU $4000
ToolBox Software $300
Cables for the ToolBox software $700
The local shop wanted $1400 to change it.
__________________
El Paso Texas, 2008 Adventurer Limited UFO (Rear Gas Engine), Ultrapower, Magnaflow, MSD Coils, Sumo Springs, TruCenter, flat tow CJ7 & 2018 Civic Hatchback
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06-02-2018, 05:51 PM
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#32
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Thanks Gramps and Old Skool,
So had you both changed the brake fluid before that? Also did you have the same alerts?
I was getting a brake system fail again today?
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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06-02-2018, 06:52 PM
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#33
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Senior Member
Join Date: Mar 2015
Location: El Paso Texas
Posts: 146
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This is only my opinion (No Facts), I think the valves in the HCU are sticking causing the alarms to go off (remember no facts). The valves are sticking because the old brake fluid was dirty or has moisture in the fluid (IMO), even with the new brake fluid change the dirt is still there.
My HCU History: (Short) My brakes locked up, I released the SAHR and then reconnected it and my brakes worked (no Alarms), I bought a new HCU, installed it but it was defective, reinstalled the old HCU after flushing it with over 5 32oz bottles of brake fluid using the ToolBox software to drain the HCU over 10 times. When you do this all fluid is flushed through the valves. I think after doing this it cleaned the valves. Maybe??? My old HCU worked great after all this, but I still installed a new one and I keep the old one as a spare.
ToolBox Software: It allows you to open and drain each valve in the HCU, I think doing this pushes brake fluid through the valves cleaning the dirt out.
__________________
El Paso Texas, 2008 Adventurer Limited UFO (Rear Gas Engine), Ultrapower, Magnaflow, MSD Coils, Sumo Springs, TruCenter, flat tow CJ7 & 2018 Civic Hatchback
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06-02-2018, 07:15 PM
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#34
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Hi Old Skool,
I will have a chat with Ultra Rv and see what they say about the sticking valves.
Do you use the ODB 2 port for the software?
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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06-02-2018, 08:02 PM
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#35
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Nov 2005
Location: Crestview FLA
Posts: 1,428
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I did not change my brake fluid before the HCU failed.
__________________
08 Holiday Rambler Vacationer XL 38PLT Workhorse R-26 UFO gas pusher,
2014 Cadillac SRX AWD, SMI Smart Box braking system.
https://myrandomviews.com/
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06-02-2018, 08:53 PM
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#36
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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I read somewhere it should be changed every two years, does that sound correct? It was proably you, Old Skool or Ufo Pilot who told me :-)
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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06-03-2018, 08:02 AM
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#37
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Senior Member
Join Date: Mar 2015
Location: El Paso Texas
Posts: 146
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The ToolBox Port is under the dash on the left side.
Brake fluid change is recommended every 2 years.
__________________
El Paso Texas, 2008 Adventurer Limited UFO (Rear Gas Engine), Ultrapower, Magnaflow, MSD Coils, Sumo Springs, TruCenter, flat tow CJ7 & 2018 Civic Hatchback
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06-03-2018, 09:19 AM
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#38
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Thanks Old Skool,
I found that port already and have a Scan gauge connected.
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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06-03-2018, 07:53 PM
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#39
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Senior Member
Join Date: Mar 2017
Location: Alaska in Summer Snow Birds in Winter
Posts: 2,073
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Quote:
Originally Posted by 1stmh
Thanks Old Skool,
I found that port already and have a Scan gauge connected.
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So you connected your scan gauge to the toolbox port? You must have used an adaptor? It seems to work ok, all your Ultra Gauge stuff reports correctly?
Ive wondered if this was possible. This is good news.
Do you remember what adaptor you got to hook the SG into the toolbox port?
Thanks.
__________________
Tom and Sherry W.
06 Winnebago Adventurer 38J Workhorse W24 Lots of motor and suspension mods in the works
02 Itasca Suncruiser 35U. Workhorse W22 w/Safe-T-Plus, Koni FSDs, UltraTrac, etc, etc.
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06-04-2018, 04:42 AM
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#40
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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Hi,
It was an ODB 2 port I connected too.
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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06-04-2018, 10:48 AM
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#41
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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I spoke to John at Ultra RV, he said to find an OTR truck shop that has the Wabco software toolkit and interface
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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06-12-2018, 02:55 PM
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#42
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Senior Member
Join Date: Jan 2017
Posts: 7,494
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I drove the coach 300 miles over the weekend with no issues at all.
Today I started the coach and got the below errors which I have not seen before, also the ABS warning light came on. I
Check ABS.
ABS Comms Failure.
No CCM ABS Comm.
I need to find a ahop that can work on Wabco brakes to diagnose.
__________________
2008 Phoenix Cruiser 3100
2012 Jeep Wrangler Sahara JKU.
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