Rear disc brake project
- Thread starter roger black
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There is an alternative that will eliminate penetrating the floor pan to
accommodate the brake line tubing. That is an electrically operated
hydraulic brake line lock. But it is more money than the J.C. Whitney item.
Leigh Harrison has them available and uses them in his six-wheel brake
system.
Although you still plumb the valve into the brake line, that part is below
the coach floor, in the original line. Only the valve wiring is routed into
the interior of the coach.
To use, you step hard on the brake pedal and switch on the lock. Step on
the pedal again and the brake releases.
Paul Bartz
From: JDDP32B [mailto:JDDP32B]
Sent: Thursday, January 07, 1999 7:00 PM
Subject: Re: GMC: Rear disc brake project
I like these. We always used them on our dump trucks in my dad's gravel
pit. They were great and they were hand controlled.. They are so easy to
use, and it is really hard to forget the brakes are on.
I have heard complaints that if you leave the pressure on for a long time
the break cylinders will leak past the cups, but looks like cheap insurance
to me. Esp.. since the emergency brake in the GMC is almost useless.
Is going up on my web page and is on my list to do. the part number is
different 85bf6592y in my catalog
Date: Thursday, 07-Jan-99 10:23 PM
From: Chill113 \ America On-Line: (chill113)
Subject: Re: GMC: Rear disc brake project
Yes I do have the part number. I guess the number would be the same in all
of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
They list another that can be used with silicone brake fluid for $24.99,
part number 73KP4432T.
If you go this route, be sure to use metal lines. I used flexible rubber
brake lines at first and found with that much distance, they had enough flex
to affect my pedal. When I switched to metal lines, no more problem. I
mounted mine just behind the base of the parking brake where it is
convenient. Just put your brakes on and hold the brake pedal down and step
on the Line Lock. Your rear wheels are locked. When you are ready to unlock
them, just hit your brake pedal. Justin 77 PB
accommodate the brake line tubing. That is an electrically operated
hydraulic brake line lock. But it is more money than the J.C. Whitney item.
Leigh Harrison has them available and uses them in his six-wheel brake
system.
Although you still plumb the valve into the brake line, that part is below
the coach floor, in the original line. Only the valve wiring is routed into
the interior of the coach.
To use, you step hard on the brake pedal and switch on the lock. Step on
the pedal again and the brake releases.
Paul Bartz
From: JDDP32B [mailto:JDDP32B]
Sent: Thursday, January 07, 1999 7:00 PM
Subject: Re: GMC: Rear disc brake project
I like these. We always used them on our dump trucks in my dad's gravel
pit. They were great and they were hand controlled.. They are so easy to
use, and it is really hard to forget the brakes are on.
I have heard complaints that if you leave the pressure on for a long time
the break cylinders will leak past the cups, but looks like cheap insurance
to me. Esp.. since the emergency brake in the GMC is almost useless.
Is going up on my web page and is on my list to do. the part number is
different 85bf6592y in my catalog
Date: Thursday, 07-Jan-99 10:23 PM
From: Chill113 \ America On-Line: (chill113)
Subject: Re: GMC: Rear disc brake project
Yes I do have the part number. I guess the number would be the same in all
of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
They list another that can be used with silicone brake fluid for $24.99,
part number 73KP4432T.
If you go this route, be sure to use metal lines. I used flexible rubber
brake lines at first and found with that much distance, they had enough flex
to affect my pedal. When I switched to metal lines, no more problem. I
mounted mine just behind the base of the parking brake where it is
convenient. Just put your brakes on and hold the brake pedal down and step
on the Line Lock. Your rear wheels are locked. When you are ready to unlock
them, just hit your brake pedal. Justin 77 PB
I have an electric brake lock system in my tool box at work. It is made by
United. It was bought at NAPA. The part number is 57504. I also have a
manual system by the same mfg. NAPA part number is 57515. I have not
installed either one on my GMC but we use them at the airport on belt
loaders and bag tractors. They work well at the airport but I do not know
if they would be effective for more than a few hours. If I were to put one
on my GMC I would use a pair of wheel chocks if I was going to leave it
parked for more than a day.
Russ Bethel
rbethel
- -----Original Message-----
From: Bartz, Paul
To: 'gmcmotorhome'
Date: Wednesday, January 20, 1999 2:48 PM
Subject: RE: GMC: Rear disc brake project
>There is an alternative that will eliminate penetrating the floor pan to
>accommodate the brake line tubing. That is an electrically operated
>hydraulic brake line lock. But it is more money than the J.C. Whitney
item.
>Leigh Harrison has them available and uses them in his six-wheel brake
>system.
>
>Although you still plumb the valve into the brake line, that part is below
>the coach floor, in the original line. Only the valve wiring is routed
into
>the interior of the coach.
>
>To use, you step hard on the brake pedal and switch on the lock. Step on
>the pedal again and the brake releases.
>
> Paul Bartz
>
>From: JDDP32B [mailto:JDDP32B]
>Sent: Thursday, January 07, 1999 7:00 PM
>Subject: Re: GMC: Rear disc brake project
>
>I like these. We always used them on our dump trucks in my dad's gravel
>pit. They were great and they were hand controlled.. They are so easy to
>use, and it is really hard to forget the brakes are on.
>I have heard complaints that if you leave the pressure on for a long time
>the break cylinders will leak past the cups, but looks like cheap insurance
>to me. Esp.. since the emergency brake in the GMC is almost useless.
>Is going up on my web page and is on my list to do. the part number is
>different 85bf6592y in my catalog
>Date: Thursday, 07-Jan-99 10:23 PM
>From: Chill113 \ America On-Line: (chill113)
>
>Subject: Re: GMC: Rear disc brake project
>
>Yes I do have the part number. I guess the number would be the same in all
>of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
>lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
>They list another that can be used with silicone brake fluid for $24.99,
>part number 73KP4432T.
>If you go this route, be sure to use metal lines. I used flexible rubber
>brake lines at first and found with that much distance, they had enough
flex
>to affect my pedal. When I switched to metal lines, no more problem. I
>mounted mine just behind the base of the parking brake where it is
>convenient. Just put your brakes on and hold the brake pedal down and step
>on the Line Lock. Your rear wheels are locked. When you are ready to unlock
>them, just hit your brake pedal. Justin 77 PB
United. It was bought at NAPA. The part number is 57504. I also have a
manual system by the same mfg. NAPA part number is 57515. I have not
installed either one on my GMC but we use them at the airport on belt
loaders and bag tractors. They work well at the airport but I do not know
if they would be effective for more than a few hours. If I were to put one
on my GMC I would use a pair of wheel chocks if I was going to leave it
parked for more than a day.
Russ Bethel
rbethel
- -----Original Message-----
From: Bartz, Paul
To: 'gmcmotorhome'
Date: Wednesday, January 20, 1999 2:48 PM
Subject: RE: GMC: Rear disc brake project
>There is an alternative that will eliminate penetrating the floor pan to
>accommodate the brake line tubing. That is an electrically operated
>hydraulic brake line lock. But it is more money than the J.C. Whitney
item.
>Leigh Harrison has them available and uses them in his six-wheel brake
>system.
>
>Although you still plumb the valve into the brake line, that part is below
>the coach floor, in the original line. Only the valve wiring is routed
into
>the interior of the coach.
>
>To use, you step hard on the brake pedal and switch on the lock. Step on
>the pedal again and the brake releases.
>
> Paul Bartz
>
>From: JDDP32B [mailto:JDDP32B]
>Sent: Thursday, January 07, 1999 7:00 PM
>Subject: Re: GMC: Rear disc brake project
>
>I like these. We always used them on our dump trucks in my dad's gravel
>pit. They were great and they were hand controlled.. They are so easy to
>use, and it is really hard to forget the brakes are on.
>I have heard complaints that if you leave the pressure on for a long time
>the break cylinders will leak past the cups, but looks like cheap insurance
>to me. Esp.. since the emergency brake in the GMC is almost useless.
>Is going up on my web page and is on my list to do. the part number is
>different 85bf6592y in my catalog
>Date: Thursday, 07-Jan-99 10:23 PM
>From: Chill113 \ America On-Line: (chill113)
>
>Subject: Re: GMC: Rear disc brake project
>
>Yes I do have the part number. I guess the number would be the same in all
>of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
>lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
>They list another that can be used with silicone brake fluid for $24.99,
>part number 73KP4432T.
>If you go this route, be sure to use metal lines. I used flexible rubber
>brake lines at first and found with that much distance, they had enough
flex
>to affect my pedal. When I switched to metal lines, no more problem. I
>mounted mine just behind the base of the parking brake where it is
>convenient. Just put your brakes on and hold the brake pedal down and step
>on the Line Lock. Your rear wheels are locked. When you are ready to unlock
>them, just hit your brake pedal. Justin 77 PB
Russ:
GMC'er Larry Fairbanks installed Leigh Harrison's six-wheel disk brake
system in late 1994 or early 1995, including the electric brake lock (Mico,
I believe). I visited Larry a couple years ago and he told me then that he
has had the brake lock engaged in excess of 30 days with no problems.
Paul Bartz
From: Russ Bethel [mailto:rbethel]
Sent: Wednesday, January 20, 1999 4:36 PM
Subject: Re: GMC: Rear disc brake project
I have an electric brake lock system in my tool box at work. It is made by
United. It was bought at NAPA. The part number is 57504. I also have a
manual system by the same mfg. NAPA part number is 57515. I have not
installed either one on my GMC but we use them at the airport on belt
loaders and bag tractors. They work well at the airport but I do not know
if they would be effective for more than a few hours. If I were to put one
on my GMC I would use a pair of wheel chocks if I was going to leave it
parked for more than a day.
From: Bartz, Paul
Date: Wednesday, January 20, 1999 2:48 PM
Subject: RE: GMC: Rear disc brake project
There is an alternative that will eliminate penetrating the floor pan to
accommodate the brake line tubing. That is an electrically operated
hydraulic brake line lock. But it is more money than the J.C. Whitney item.
Leigh Harrison has them available and uses them in his six-wheel brake
system.
Although you still plumb the valve into the brake line, that part is below
the coach floor, in the original line. Only the valve wiring is routed into
the interior of the coach.
To use, you step hard on the brake pedal and switch on the lock. Step on
the pedal again and the brake releases.
From: JDDP32B [mailto:JDDP32B]
Sent: Thursday, January 07, 1999 7:00 PM
Subject: Re: GMC: Rear disc brake project
I like these. We always used them on our dump trucks in my dad's gravel
pit. They were great and they were hand controlled.. They are so easy to
use, and it is really hard to forget the brakes are on. I have heard
complaints that if you leave the pressure on for a long time the break
cylinders will leak past the cups, but looks like cheap insurance to me.
Esp.. since the emergency brake in the GMC is almost useless.
Is going up on my web page and is on my list to do. the part number is
different 85bf6592y in my catalog
Date: Thursday, 07-Jan-99 10:23 PM
From: Chill113 \ America On-Line: (chill113)
Subject: Re: GMC: Rear disc brake project
Yes I do have the part number. I guess the number would be the same in all
of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
They list another that can be used with silicone brake fluid for $24.99,
part number 73KP4432T.
If you go this route, be sure to use metal lines. I used flexible rubber
brake lines at first and found with that much distance, they had enough flex
to affect my pedal. When I switched to metal lines, no more problem. I
mounted mine just behind the base of the parking brake where it is
convenient. Just put your brakes on and hold the brake pedal down and step
on the Line Lock. Your rear wheels are locked. When you are ready to unlock
them, just hit your brake pedal. Justin 77 PB
GMC'er Larry Fairbanks installed Leigh Harrison's six-wheel disk brake
system in late 1994 or early 1995, including the electric brake lock (Mico,
I believe). I visited Larry a couple years ago and he told me then that he
has had the brake lock engaged in excess of 30 days with no problems.
Paul Bartz
From: Russ Bethel [mailto:rbethel]
Sent: Wednesday, January 20, 1999 4:36 PM
Subject: Re: GMC: Rear disc brake project
I have an electric brake lock system in my tool box at work. It is made by
United. It was bought at NAPA. The part number is 57504. I also have a
manual system by the same mfg. NAPA part number is 57515. I have not
installed either one on my GMC but we use them at the airport on belt
loaders and bag tractors. They work well at the airport but I do not know
if they would be effective for more than a few hours. If I were to put one
on my GMC I would use a pair of wheel chocks if I was going to leave it
parked for more than a day.
From: Bartz, Paul
Date: Wednesday, January 20, 1999 2:48 PM
Subject: RE: GMC: Rear disc brake project
There is an alternative that will eliminate penetrating the floor pan to
accommodate the brake line tubing. That is an electrically operated
hydraulic brake line lock. But it is more money than the J.C. Whitney item.
Leigh Harrison has them available and uses them in his six-wheel brake
system.
Although you still plumb the valve into the brake line, that part is below
the coach floor, in the original line. Only the valve wiring is routed into
the interior of the coach.
To use, you step hard on the brake pedal and switch on the lock. Step on
the pedal again and the brake releases.
From: JDDP32B [mailto:JDDP32B]
Sent: Thursday, January 07, 1999 7:00 PM
Subject: Re: GMC: Rear disc brake project
I like these. We always used them on our dump trucks in my dad's gravel
pit. They were great and they were hand controlled.. They are so easy to
use, and it is really hard to forget the brakes are on. I have heard
complaints that if you leave the pressure on for a long time the break
cylinders will leak past the cups, but looks like cheap insurance to me.
Esp.. since the emergency brake in the GMC is almost useless.
Is going up on my web page and is on my list to do. the part number is
different 85bf6592y in my catalog
Date: Thursday, 07-Jan-99 10:23 PM
From: Chill113 \ America On-Line: (chill113)
Subject: Re: GMC: Rear disc brake project
Yes I do have the part number. I guess the number would be the same in all
of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
They list another that can be used with silicone brake fluid for $24.99,
part number 73KP4432T.
If you go this route, be sure to use metal lines. I used flexible rubber
brake lines at first and found with that much distance, they had enough flex
to affect my pedal. When I switched to metal lines, no more problem. I
mounted mine just behind the base of the parking brake where it is
convenient. Just put your brakes on and hold the brake pedal down and step
on the Line Lock. Your rear wheels are locked. When you are ready to unlock
them, just hit your brake pedal. Justin 77 PB
OOPS!
I got my part numbers reversed. The electric lock NAPA part number is 57515
and the manual NAPA part number is 57504.
Russ Bethel
rbethel
- -----Original Message-----
From: Russ Bethel
To: gmcmotorhome
Date: Wednesday, January 20, 1999 3:37 PM
Subject: Re: GMC: Rear disc brake project
>I have an electric brake lock system in my tool box at work. It is made by
>United. It was bought at NAPA. The part number is 57504. I also have a
>manual system by the same mfg. NAPA part number is 57515. I have not
>installed either one on my GMC but we use them at the airport on belt
>loaders and bag tractors. They work well at the airport but I do not know
>if they would be effective for more than a few hours. If I were to put one
>on my GMC I would use a pair of wheel chocks if I was going to leave it
>parked for more than a day.
>
>Russ Bethel
>rbethel
>
>-----Original Message-----
>From: Bartz, Paul
>To: 'gmcmotorhome'
>Date: Wednesday, January 20, 1999 2:48 PM
>Subject: RE: GMC: Rear disc brake project
>
>
>>There is an alternative that will eliminate penetrating the floor pan to
>>accommodate the brake line tubing. That is an electrically operated
>>hydraulic brake line lock. But it is more money than the J.C. Whitney
>item.
>>Leigh Harrison has them available and uses them in his six-wheel brake
>>system.
>>
>>Although you still plumb the valve into the brake line, that part is below
>>the coach floor, in the original line. Only the valve wiring is routed
>into
>>the interior of the coach.
>>
>>To use, you step hard on the brake pedal and switch on the lock. Step on
>>the pedal again and the brake releases.
>>
>> Paul Bartz
>>
>>From: JDDP32B [mailto:JDDP32B]
>>Sent: Thursday, January 07, 1999 7:00 PM
>>Subject: Re: GMC: Rear disc brake project
>>
>>I like these. We always used them on our dump trucks in my dad's gravel
>>pit. They were great and they were hand controlled.. They are so easy to
>>use, and it is really hard to forget the brakes are on.
>>I have heard complaints that if you leave the pressure on for a long time
>>the break cylinders will leak past the cups, but looks like cheap
insurance
>>to me. Esp.. since the emergency brake in the GMC is almost useless.
>>Is going up on my web page and is on my list to do. the part number is
>>different 85bf6592y in my catalog
>>Date: Thursday, 07-Jan-99 10:23 PM
>>From: Chill113 \ America On-Line: (chill113)
>>
>>Subject: Re: GMC: Rear disc brake project
>>
>>Yes I do have the part number. I guess the number would be the same in
all
>>of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
>>lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
>>They list another that can be used with silicone brake fluid for $24.99,
>>part number 73KP4432T.
>>If you go this route, be sure to use metal lines. I used flexible rubber
>>brake lines at first and found with that much distance, they had enough
>flex
>>to affect my pedal. When I switched to metal lines, no more problem. I
>>mounted mine just behind the base of the parking brake where it is
>>convenient. Just put your brakes on and hold the brake pedal down and step
>>on the Line Lock. Your rear wheels are locked. When you are ready to
unlock
>>them, just hit your brake pedal. Justin 77 PB
>
I got my part numbers reversed. The electric lock NAPA part number is 57515
and the manual NAPA part number is 57504.
Russ Bethel
rbethel
- -----Original Message-----
From: Russ Bethel
To: gmcmotorhome
Date: Wednesday, January 20, 1999 3:37 PM
Subject: Re: GMC: Rear disc brake project
>I have an electric brake lock system in my tool box at work. It is made by
>United. It was bought at NAPA. The part number is 57504. I also have a
>manual system by the same mfg. NAPA part number is 57515. I have not
>installed either one on my GMC but we use them at the airport on belt
>loaders and bag tractors. They work well at the airport but I do not know
>if they would be effective for more than a few hours. If I were to put one
>on my GMC I would use a pair of wheel chocks if I was going to leave it
>parked for more than a day.
>
>Russ Bethel
>rbethel
>
>-----Original Message-----
>From: Bartz, Paul
>To: 'gmcmotorhome'
>Date: Wednesday, January 20, 1999 2:48 PM
>Subject: RE: GMC: Rear disc brake project
>
>
>>There is an alternative that will eliminate penetrating the floor pan to
>>accommodate the brake line tubing. That is an electrically operated
>>hydraulic brake line lock. But it is more money than the J.C. Whitney
>item.
>>Leigh Harrison has them available and uses them in his six-wheel brake
>>system.
>>
>>Although you still plumb the valve into the brake line, that part is below
>>the coach floor, in the original line. Only the valve wiring is routed
>into
>>the interior of the coach.
>>
>>To use, you step hard on the brake pedal and switch on the lock. Step on
>>the pedal again and the brake releases.
>>
>> Paul Bartz
>>
>>From: JDDP32B [mailto:JDDP32B]
>>Sent: Thursday, January 07, 1999 7:00 PM
>>Subject: Re: GMC: Rear disc brake project
>>
>>I like these. We always used them on our dump trucks in my dad's gravel
>>pit. They were great and they were hand controlled.. They are so easy to
>>use, and it is really hard to forget the brakes are on.
>>I have heard complaints that if you leave the pressure on for a long time
>>the break cylinders will leak past the cups, but looks like cheap
insurance
>>to me. Esp.. since the emergency brake in the GMC is almost useless.
>>Is going up on my web page and is on my list to do. the part number is
>>different 85bf6592y in my catalog
>>Date: Thursday, 07-Jan-99 10:23 PM
>>From: Chill113 \ America On-Line: (chill113)
>>
>>Subject: Re: GMC: Rear disc brake project
>>
>>Yes I do have the part number. I guess the number would be the same in
all
>>of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
>>lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
>>They list another that can be used with silicone brake fluid for $24.99,
>>part number 73KP4432T.
>>If you go this route, be sure to use metal lines. I used flexible rubber
>>brake lines at first and found with that much distance, they had enough
>flex
>>to affect my pedal. When I switched to metal lines, no more problem. I
>>mounted mine just behind the base of the parking brake where it is
>>convenient. Just put your brakes on and hold the brake pedal down and step
>>on the Line Lock. Your rear wheels are locked. When you are ready to
unlock
>>them, just hit your brake pedal. Justin 77 PB
>
What is the effect of having the rear rubber hoses under pressure for
an extended period ?
Ted Schurman
73 Glacier VA
>
> I have an electric brake lock system in my tool box at work. It is made by
> United. It was bought at NAPA. The part number is 57504. I also have a
> manual system by the same mfg. NAPA part number is 57515. I have not
> installed either one on my GMC but we use them at the airport on belt
> loaders and bag tractors. They work well at the airport but I do not know
> if they would be effective for more than a few hours. If I were to put one
> on my GMC I would use a pair of wheel chocks if I was going to leave it
> parked for more than a day.
>
> Russ Bethel
> rbethel
>
> -----Original Message-----
> From: Bartz, Paul
> To: 'gmcmotorhome'
> Date: Wednesday, January 20, 1999 2:48 PM
> Subject: RE: GMC: Rear disc brake project
>
> >There is an alternative that will eliminate penetrating the floor pan to
> >accommodate the brake line tubing. That is an electrically operated
> >hydraulic brake line lock. But it is more money than the J.C. Whitney
> item.
> >Leigh Harrison has them available and uses them in his six-wheel brake
> >system.
> >
> >Although you still plumb the valve into the brake line, that part is below
> >the coach floor, in the original line. Only the valve wiring is routed
> into
> >the interior of the coach.
> >
> >To use, you step hard on the brake pedal and switch on the lock. Step on
> >the pedal again and the brake releases.
> >
> > Paul Bartz
> >
> >From: JDDP32B [mailto:JDDP32B]
> >Sent: Thursday, January 07, 1999 7:00 PM
> >Subject: Re: GMC: Rear disc brake project
> >
> >I like these. We always used them on our dump trucks in my dad's gravel
> >pit. They were great and they were hand controlled.. They are so easy to
> >use, and it is really hard to forget the brakes are on.
> >I have heard complaints that if you leave the pressure on for a long time
> >the break cylinders will leak past the cups, but looks like cheap insurance
> >to me. Esp.. since the emergency brake in the GMC is almost useless.
> >Is going up on my web page and is on my list to do. the part number is
> >different 85bf6592y in my catalog
> >Date: Thursday, 07-Jan-99 10:23 PM
> >From: Chill113 \ America On-Line: (chill113)
> >
> >Subject: Re: GMC: Rear disc brake project
> >
> >Yes I do have the part number. I guess the number would be the same in all
> >of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
> >lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
> >They list another that can be used with silicone brake fluid for $24.99,
> >part number 73KP4432T.
> >If you go this route, be sure to use metal lines. I used flexible rubber
> >brake lines at first and found with that much distance, they had enough
> flex
> >to affect my pedal. When I switched to metal lines, no more problem. I
> >mounted mine just behind the base of the parking brake where it is
> >convenient. Just put your brakes on and hold the brake pedal down and step
> >on the Line Lock. Your rear wheels are locked. When you are ready to unlock
> >them, just hit your brake pedal. Justin 77 PB
an extended period ?
Ted Schurman
73 Glacier VA
>
> I have an electric brake lock system in my tool box at work. It is made by
> United. It was bought at NAPA. The part number is 57504. I also have a
> manual system by the same mfg. NAPA part number is 57515. I have not
> installed either one on my GMC but we use them at the airport on belt
> loaders and bag tractors. They work well at the airport but I do not know
> if they would be effective for more than a few hours. If I were to put one
> on my GMC I would use a pair of wheel chocks if I was going to leave it
> parked for more than a day.
>
> Russ Bethel
> rbethel
>
> -----Original Message-----
> From: Bartz, Paul
> To: 'gmcmotorhome'
> Date: Wednesday, January 20, 1999 2:48 PM
> Subject: RE: GMC: Rear disc brake project
>
> >There is an alternative that will eliminate penetrating the floor pan to
> >accommodate the brake line tubing. That is an electrically operated
> >hydraulic brake line lock. But it is more money than the J.C. Whitney
> item.
> >Leigh Harrison has them available and uses them in his six-wheel brake
> >system.
> >
> >Although you still plumb the valve into the brake line, that part is below
> >the coach floor, in the original line. Only the valve wiring is routed
> into
> >the interior of the coach.
> >
> >To use, you step hard on the brake pedal and switch on the lock. Step on
> >the pedal again and the brake releases.
> >
> > Paul Bartz
> >
> >From: JDDP32B [mailto:JDDP32B]
> >Sent: Thursday, January 07, 1999 7:00 PM
> >Subject: Re: GMC: Rear disc brake project
> >
> >I like these. We always used them on our dump trucks in my dad's gravel
> >pit. They were great and they were hand controlled.. They are so easy to
> >use, and it is really hard to forget the brakes are on.
> >I have heard complaints that if you leave the pressure on for a long time
> >the break cylinders will leak past the cups, but looks like cheap insurance
> >to me. Esp.. since the emergency brake in the GMC is almost useless.
> >Is going up on my web page and is on my list to do. the part number is
> >different 85bf6592y in my catalog
> >Date: Thursday, 07-Jan-99 10:23 PM
> >From: Chill113 \ America On-Line: (chill113)
> >
> >Subject: Re: GMC: Rear disc brake project
> >
> >Yes I do have the part number. I guess the number would be the same in all
> >of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
> >lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
> >They list another that can be used with silicone brake fluid for $24.99,
> >part number 73KP4432T.
> >If you go this route, be sure to use metal lines. I used flexible rubber
> >brake lines at first and found with that much distance, they had enough
> flex
> >to affect my pedal. When I switched to metal lines, no more problem. I
> >mounted mine just behind the base of the parking brake where it is
> >convenient. Just put your brakes on and hold the brake pedal down and step
> >on the Line Lock. Your rear wheels are locked. When you are ready to unlock
> >them, just hit your brake pedal. Justin 77 PB
Ted:
I talked both to Leigh Harrison and Larry Fairbanks about your question.
Leigh said he hasn't heard of any hose ballooning and Larry said he had no
relaxing of the brakes over a 30 day period.
Paul Bartz
From: Ted Schurman [mailto:tedsch]
Sent: Wednesday, January 20, 1999 9:53 PM
Subject: Re: GMC: Rear disc brake project
What is the effect of having the rear rubber hoses under pressure for an
extended period ?
I have an electric brake lock system in my tool box at work. It is made by
United. It was bought at NAPA. The part number is 57504. I also have a
manual system by the same mfg. NAPA part number is 57515. I have not
installed either one on my GMC but we use them at the airport on belt
loaders and bag tractors. They work well at the airport but I do not know
if they would be effective for more than a few hours. If I were to put one
on my GMC I would use a pair of wheel chocks if I was going to leave it
parked for more than a day.
From: Bartz, Paul
Date: Wednesday, January 20, 1999 2:48 PM
Subject: RE: GMC: Rear disc brake project
There is an alternative that will eliminate penetrating the floor pan to
accommodate the brake line tubing. That is an electrically operated
hydraulic brake line lock. But it is more money than the J.C. Whitney item.
Leigh Harrison has them available and uses them in his six-wheel brake
system.
Although you still plumb the valve into the brake line, that part is below
the coach floor, in the original line. Only the valve wiring is routed into
the interior of the coach.
To use, you step hard on the brake pedal and switch on the lock. Step on
the pedal again and the brake releases.
From: JDDP32B
[mailto:JDDP32B]
Sent: Thursday, January 07, 1999 7:00 PM
Subject: Re: GMC: Rear disc brake project
I like these. We always used them on our dump trucks in my dad's gravel
pit. They were great and they were hand controlled.. They are so easy to
use, and it is really hard to forget the brakes are on.
I have heard complaints that if you leave the pressure on for a long time
the break cylinders will leak past the cups, but looks like cheap insurance
to me. Esp.. since the emergency brake in the GMC is almost useless.
Is going up on my web page and is on my list to do. the part number is
different 85bf6592y in my catalog
Date: Thursday, 07-Jan-99 10:23 PM
From: Chill113 \ America On-Line: (chill113)
Subject: Re: GMC: Rear disc brake project
Yes I do have the part number. I guess the number would be the same in all
of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
They list another that can be used with silicone brake fluid for $24.99,
part number 73KP4432T.
If you go this route, be sure to use metal lines. I used flexible rubber
brake lines at first and found with that much distance, they had enough flex
to affect my pedal. When I switched to metal lines, no more problem. I
mounted mine just behind the base of the parking brake where it is
convenient. Just put your brakes on and hold the brake pedal down and step
on the Line Lock. Your rear wheels are locked. When you are ready to unlock
them, just hit your brake pedal.
I talked both to Leigh Harrison and Larry Fairbanks about your question.
Leigh said he hasn't heard of any hose ballooning and Larry said he had no
relaxing of the brakes over a 30 day period.
Paul Bartz
From: Ted Schurman [mailto:tedsch]
Sent: Wednesday, January 20, 1999 9:53 PM
Subject: Re: GMC: Rear disc brake project
What is the effect of having the rear rubber hoses under pressure for an
extended period ?
I have an electric brake lock system in my tool box at work. It is made by
United. It was bought at NAPA. The part number is 57504. I also have a
manual system by the same mfg. NAPA part number is 57515. I have not
installed either one on my GMC but we use them at the airport on belt
loaders and bag tractors. They work well at the airport but I do not know
if they would be effective for more than a few hours. If I were to put one
on my GMC I would use a pair of wheel chocks if I was going to leave it
parked for more than a day.
From: Bartz, Paul
Date: Wednesday, January 20, 1999 2:48 PM
Subject: RE: GMC: Rear disc brake project
There is an alternative that will eliminate penetrating the floor pan to
accommodate the brake line tubing. That is an electrically operated
hydraulic brake line lock. But it is more money than the J.C. Whitney item.
Leigh Harrison has them available and uses them in his six-wheel brake
system.
Although you still plumb the valve into the brake line, that part is below
the coach floor, in the original line. Only the valve wiring is routed into
the interior of the coach.
To use, you step hard on the brake pedal and switch on the lock. Step on
the pedal again and the brake releases.
From: JDDP32B
[mailto:JDDP32B]
Sent: Thursday, January 07, 1999 7:00 PM
Subject: Re: GMC: Rear disc brake project
I like these. We always used them on our dump trucks in my dad's gravel
pit. They were great and they were hand controlled.. They are so easy to
use, and it is really hard to forget the brakes are on.
I have heard complaints that if you leave the pressure on for a long time
the break cylinders will leak past the cups, but looks like cheap insurance
to me. Esp.. since the emergency brake in the GMC is almost useless.
Is going up on my web page and is on my list to do. the part number is
different 85bf6592y in my catalog
Date: Thursday, 07-Jan-99 10:23 PM
From: Chill113 \ America On-Line: (chill113)
Subject: Re: GMC: Rear disc brake project
Yes I do have the part number. I guess the number would be the same in all
of their catalogs, but I'm looking at Catalog No. 616-1J On page 183 it
lists an In-line Hydraulic Brake Lock. part number 85KP6592Y for $22.49.
They list another that can be used with silicone brake fluid for $24.99,
part number 73KP4432T.
If you go this route, be sure to use metal lines. I used flexible rubber
brake lines at first and found with that much distance, they had enough flex
to affect my pedal. When I switched to metal lines, no more problem. I
mounted mine just behind the base of the parking brake where it is
convenient. Just put your brakes on and hold the brake pedal down and step
on the Line Lock. Your rear wheels are locked. When you are ready to unlock
them, just hit your brake pedal.
