line lock...
Thread Starter
Instructor
Joined: Apr 2008
Posts: 105
Likes: 0
From: West Point NE
line lock...
how do u set up a line lock with the porportioning valve in a 1980 vette.....
i bought the jegs line lock and i was just installing it... does it go after the valve or before it....
maybe someone can draw a diagram for me...?
thanks
i bought the jegs line lock and i was just installing it... does it go after the valve or before it....
maybe someone can draw a diagram for me...?
thanks
Le Mans Master
Joined: May 2002
Posts: 5,086
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From: Lebanon Township New Jersey
I have a Hurst line lock in my 77. As I recall, I installed it between the master cyl and the proportioning valve the way the instructions indicated. It works like it should, brakes are good too.
Burning Brakes
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From: Concord Calif
Melting Slicks
Joined: Nov 2001
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From: Katy (Houston) TX
CI 7-8 Veteran
I'm not too familiar with the later model C3 brake system but on my '69 there is a dual master cylinder and you can put it inline from the MC to the prop valve on the front wheel line. That's what I did. I located the unit on the fender under the MC. Works great!
Team Owner
Joined: Apr 1999
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I did a write up with pictures if you dig back in time on line locks
Burning Brakes
Joined: Jan 2007
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From: Concord Calif
Your right!
Melting Slicks
Joined: Oct 2005
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From: Redruth Cornwall
did a lil digging...
http://forums.corvetteforum.com/c3-t...brakeline.html
the link you posted to is out of date now though I think.
http://forums.corvetteforum.com/c3-t...brakeline.html
the link you posted to is out of date now though I think.
Thread Starter
Instructor
Joined: Apr 2008
Posts: 105
Likes: 0
From: West Point NE
mine also has the split banks in it too.... and i would like to do it just like g skull did it.... nice and simple.....
roll control to a lil line then right back into the system....
if u do it like this does the brake light come on?
roll control to a lil line then right back into the system....
if u do it like this does the brake light come on?
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Le Mans Master
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From: Fernandina Beach FL
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It would not turn on your brake lights. However- you could put a relay powered the same as the line lock- switched to ground and tap the wire at your e-brake-and it would light the brake light in gauges up -so you'd know it's on.
Richard
Richard
Le Mans Master
Joined: Oct 2000
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From: Santa Ana CA
I have mine (Hurst Roll Control) replacing the front brake "T" fitting. A single line comes out of the M/C and feeds directly to the lock. The lock splits the lines for the left and right front brakes. It's barely visible on the frame just at the front header.
Last edited by toddalin; Aug 1, 2009 at 04:00 PM.
Le Mans Master
Joined: Oct 2000
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From: Santa Ana CA
You would want to put a diode on this wire so that when you engage the brakes at the pedal on a regular basis, the +12 volts does not feed back down this wire, get into the line lock wire, and turn on the line lock when you don't want it on.
Last edited by toddalin; Aug 1, 2009 at 04:09 PM.
Le Mans Master
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From: Fernandina Beach FL
2023 Restomod of the Year finalist
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Even easier than this. You can just wire the brake lights in parallel with the line lock switch. You've got to physically hold the line lock switch to keep the lock engaged so this would also keep the brake lights engaged whenever the lock is in operation.
You would want to put a diode on this wire so that when you engage the brakes at the pedal on a regular basis, the +12 volts does not feed back down this wire, get into the line lock wire, and turn on the line lock when you don't want it on.
You would want to put a diode on this wire so that when you engage the brakes at the pedal on a regular basis, the +12 volts does not feed back down this wire, get into the line lock wire, and turn on the line lock when you don't want it on.
Richard
Le Mans Master
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From: Santa Ana CA
No difference except instead of a wire to the brake lights, it would go to the parking brake light. You would still want the diode so that when the parking brake is engaged turning on this light, it doesn't feed back through the wire and engage the line lock.
As for a visual indication, my Hurst came with a light to tell when it is engaged, but I never mounted/connected it. I know that when I hold the button and the car can't move, it's engaged.
Le Mans Master
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From: Lebanon Township New Jersey
Le Mans Master
Joined: May 2003
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From: Fernandina Beach FL
2023 Restomod of the Year finalist
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No difference except instead of a wire to the brake lights, it would go to the parking brake light. You would still want the diode so that when the parking brake is engaged turning on this light, it doesn't feed back through the wire and engage the line lock.
As for a visual indication, my Hurst came with a light to tell when it is engaged, but I never mounted/connected it. I know that when I hold the button and the car can't move, it's engaged.
As for a visual indication, my Hurst came with a light to tell when it is engaged, but I never mounted/connected it. I know that when I hold the button and the car can't move, it's engaged.
Here's a simple diagram- no diode needed because there is nothing to feedback -The relay only completes the circuit as if the parking brake is pulled up (or bad master brake cylinder)-Only thing pulling the e-brake up when the line lock is on (and gauge brake light) would be a double ground on the circuit-and perhaps the bulb might glow a little brighter.
Two wires go to a ground, one wire to the line lock and one to the e-brake wire-Done.
Richard
Le Mans Master
Joined: Oct 2000
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From: Santa Ana CA
Sorry- won't work- the Brake Light in the Tach gauge sees +12 volts when the ignition is on-Won't light up till it sees a ground through either the parking brake switch or the brake master cylinder switch.
Here's a simple diagram- no diode needed because there is nothing to feedback -The relay only completes the circuit as if the parking brake is pulled up (or bad master brake cylinder)-Only thing pulling the e-brake up when the line lock is on (and gauge brake light) would be a double ground on the circuit-and perhaps the bulb might glow a little brighter.
Two wires go to a ground, one wire to the line lock and one to the e-brake wire-Done.
Richard
Here's a simple diagram- no diode needed because there is nothing to feedback -The relay only completes the circuit as if the parking brake is pulled up (or bad master brake cylinder)-Only thing pulling the e-brake up when the line lock is on (and gauge brake light) would be a double ground on the circuit-and perhaps the bulb might glow a little brighter.
Two wires go to a ground, one wire to the line lock and one to the e-brake wire-Done.
Richard
Except for the parking brake light, the wiring diagrams show the lights in the cluster need +12 volts to work whereas the parking brake already has the +12 volts and needs a ground to work.
The wire and diode would still work if a different cluster light (e.g., high beams or both turn indicators, with two diodes) were selected as an indicator instead of the parking brake light.
Also the parking brake light could be used if the line lock activation switch was a double pole single throw with one of the two poles dedicated to grounding the parking brake light. In this case the diode wouldn't be necessary either.
Actually, to be PC, line locks are now known as "hill holders" and wiring the rear end brake lights up to the line lock is not a bad idea.
