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Master Cylinder replacement with trailer brakes #464746 09/10/09 11:40 AM 09/10/09 11:40 AM
Joined: Feb 2006 Posts: 4,102 Cochise County Arizona SPWC OP master
SPWC OP master Joined: Feb 2006 Posts: 4,102 Cochise County Arizona	My 73 Dodge D200 has a master cylinder I might need to replace as I cant find a gasket for the lid. The port for the front brakes has a TEE for the brake line going to the trailer brakes that have been installed in the truck Question I have is,if and when I do replace the master cylinder,will this tee play any part in bleeding the brakes once the master is installed? Is there a difference in how brakes are bled when trailer brakes are installed?

Re: Master Cylinder replacement with trailer brakes [Re: SPWC] #464747 09/10/09 11:48 AM 09/10/09 11:48 AM
Joined: Jan 2003 Posts: 75,002 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,002 U.S.S.A.	huh ??? I have never see trailer brakes plumbed to the tow vehicle ???

Re: Master Cylinder replacement with trailer brakes [Re: JohnRR] #464748 09/10/09 12:01 PM 09/10/09 12:01 PM
Joined: Feb 2006 Posts: 4,102 Cochise County Arizona SPWC OP master
SPWC OP master Joined: Feb 2006 Posts: 4,102 Cochise County Arizona	Call me crazy,but that sure is what it looks like to me. Take a look at these pictures,I got this truck from a friend,and it was this way when he got it. I have no knowledge about trailer brakes. Here you can see the "TEE" and the lines coming off the master. One line goes off the tee back into the firewall/interior and hooks up to the back of the trailer brake unit under the dash. 5474159-002.JPG (35 downloads)

Re: Master Cylinder replacement with trailer brakes [Re: SPWC] #464749 09/10/09 12:03 PM 09/10/09 12:03 PM
Joined: Feb 2006 Posts: 4,102 Cochise County Arizona SPWC OP master
SPWC OP master Joined: Feb 2006 Posts: 4,102 Cochise County Arizona	Here a view of the back of the trailer brake controller where the line coming through the firewall attaches to.Dont ask me...I know nothing about these things. 5474164-004.JPG (43 downloads)

Re: Master Cylinder replacement with trailer brakes [Re: SPWC] #464750 09/10/09 12:09 PM 09/10/09 12:09 PM
Joined: Jan 2003 Posts: 5,138 East Aurora (Buffalo) NY RoadRunner master
RoadRunner master Joined: Jan 2003 Posts: 5,138 East Aurora (Buffalo) NY	Yep, that is on old brake controller unit. I would not reuse it. You can get a nice electric break controller from Tekonsha (I have the Prodigy) that has proportional brake signal and is very adjustable. I assume your trailer has electric brakes. 68 Road Runner (383/4speed, post car w/decor pkg) - Major Project 69 Road Runner w/472 Hemi & 4 speed. 70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project 2023 Ford Mach 1

Re: Master Cylinder replacement with trailer brakes [Re: RoadRunner] #464751 09/10/09 12:19 PM 09/10/09 12:19 PM
Joined: Jan 2003 Posts: 4,713 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,713 Moved to N.E. Tennessee	Quote: Yep, that is on old brake controller unit. I would not reuse it. You can get a nice electric break controller from Tekonsha (I have the Prodigy) that has proportional brake signal and is very adjustable. I assume your trailer has electric brakes. X2 I would also recommend changing over to a Prodigy. Best controller I have used.

Re: Master Cylinder replacement with trailer brakes [Re: GomangoCuda] #464752 09/10/09 12:25 PM 09/10/09 12:25 PM
Joined: Feb 2006 Posts: 4,102 Cochise County Arizona SPWC OP master
SPWC OP master Joined: Feb 2006 Posts: 4,102 Cochise County Arizona	I dont own a trailer,and am not sure if I would ever use this truck to tow. So basically this brajke controller is a mechanical/hydraulic unit,where the modern ones are electric? So IF I decide to keep the trailer brakes as they are,will this play any part in replacing the master cylinder and bleeding the brakes? Anything additional I have to do because of the brake controller concerning bleeding of the brakes?

Re: Master Cylinder replacement with trailer brakes [Re: SPWC] #464753 09/10/09 12:52 PM 09/10/09 12:52 PM
Joined: Dec 2007 Posts: 10,542 BROOK PARK, OH WILD BILL Senior Member of the Junior Dragster Club
WILD BILL Senior Member of the Junior Dragster Club Joined: Dec 2007 Posts: 10,542 BROOK PARK, OH	Does that controller have a bleeder and if so does it open? If you open the lines at the master the system will need to be bleed. If yes then you can leave it and just bleed it alnog with everything else. If the answer to either is no then I would recomend removing it, and the T fitting and returning the brakes to their as factory plumbing.

Re: Master Cylinder replacement with trailer brakes [Re: GomangoCuda] #464754 09/10/09 03:41 PM 09/10/09 03:41 PM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: Quote: Yep, that is on old brake controller unit. I would not reuse it. You can get a nice electric break controller from Tekonsha (I have the Prodigy) that has proportional brake signal and is very adjustable. I assume your trailer has electric brakes. X2 I would also recommend changing over to a Prodigy. Best controller I have used. X3 best one on the market for the $. Hydraulic pressure as a trailer brake sensor technology went away in the 80's - and a good thing it did! Fastest 300

Re: Master Cylinder replacement with trailer brakes [Re: SPWC] #464755 09/10/09 04:07 PM 09/10/09 04:07 PM
Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun nomore65BelvJim I Live Here
nomore65BelvJim I Live Here Joined: Dec 2003 Posts: 16,844 Phoenix - surface of the sun	Chris if your going to replace the master I would remove the "T". Leaving it in will be more trouble than its worth. Pull the rest of the controller stuff if you want to but be sure to disconnect the electrical to/from it at least.

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