Skip to main content ↑ ↓
Topic: Please help air leak at parking brake (Read 528 times) previous topic - next topic

Please help air leak at parking brake

I have a very steady air leak when I disengage the parking break, circled in the pic is where it is coming from. It feels like it is coming directly from the three wires circled in red. It only leaks when parking break is off.
Any ideas, help would be greatly appreciated.

I'm trying to leave to get back home 400 miles from where I am (Munford Alabama).

Thanks,
James
2001 36' U320 Build 5901
2001 LX470

Re: Please help air leak at parkn break

Reply #1 –
So it is coming from the parking brake switch, where the three wires plug into. Anyone know of a part number, or field expedient fix?
2001 36' U320 Build 5901
2001 LX470

Re: Please help air leak at parkn break

Reply #2 –
That is a common part on air brake trucks Napa should have it and most truck stops also. Depending how much air is being lost it could be drivable if the compressor keeps up with the loss. I have had to drive one of my cranes with that valve leaking to get back to my yard. After that I kept a spare in the truck. It doesn't have to look the same just needs the same ports. It can even be a reverse one that releases when pulled to get you home.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Please help air leak at parkn break

Reply #3 –
Ok fellow FT'rs.... I'm in need of a pressure switch, part number 77040 10 made by Honeywell. If by small chance someone has one laying around please call me 912-655-1433. I'm stuck in Munford AL.
2001 36' U320 Build 5901
2001 LX470

Re: Please help air leak at parkn break

Reply #4 –

Is this what you're looking for?  Amazon.com: 77040-00000120-01 Series 5000 Extended Duty Pressure Switch :...

As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.
2001 4010 U320 build #5865 "Bluto-d-Bus" since 09/18
2006 Honda Element ESP Toad
Full timing since 2016 in Western MT
Copilot: Sitka
1975 GMC 260 Avion: sold

Re: Please help air leak at parking brake

Reply #5 –
Maybe fit a pipe plug. ?

Re: Please help air leak at parking brake

Reply #6 –
Mike, got a plug for the fitting and I believe it's going to work.
2001 36' U320 Build 5901
2001 LX470

Re: Please help air leak at parking brake

Reply #7 –
If that is the exhaust port you are plugging you may not have a park brake.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Please help air leak at parking brake

Reply #8 –
I changed mine last year with this one.  Direct replacement.

jk
Jack and Cathy
1992 U280 Unihome 36' Build #4034
Cummins 8.3 /  Allison MT647/ PacBrake
Apopka, FL / Barre Center, NY

Re: Please help air leak at parking brake

Reply #9 –
The switch should be in its own hole. imho

Re: Please help air leak at parking brake

Reply #10 –
You  could try these guys.  Nine miles southwest of you.

jk


Talladega Auto Parts
35450 AL 21
Talladega,  AL  35160
(256) 362-1770
Jack and Cathy
1992 U280 Unihome 36' Build #4034
Cummins 8.3 /  Allison MT647/ PacBrake
Apopka, FL / Barre Center, NY
 

Re: Please help air leak at parking brake

Reply #11 –
Call FT and just buy one.
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.