LR3/4 emergency brake actuator question - Defender Source
Defender Source  

Go Back   Defender Source > Non-Technical Discussions > Misc. Chit-Chat


Reply
 
Thread Tools
  #1  
Old September 26th, 2013, 03:26 PM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,623
Registry
LR3/4 emergency brake actuator question

Does anyone know if the signal to these is simple - like 12v+ to engage or something?
__________________
Quote:
Originally Posted by pendy
I'm here for the D's
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old September 26th, 2013, 03:43 PM
nathanwind's Avatar
nathanwind
Status: Offline
Jason Lavender
88-90-127-LR3
D-90 Source Vendor
 
Join Date: Jan 2008
Location: Saratoga NY
Posts: 8,741
Registry
What's the issue with yours?
__________________
Jason Lavender
'71 Series IIA
'88 127 #F96 DKN
'94 90 NAS #324
'06 LR3 HSE

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

(10% discount for DSource members, use coupon code "D90")

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #3  
Old September 26th, 2013, 04:11 PM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,623
Registry
Mine is fine. I am considering using one of these for the EV project but they are kind of pricey. Don't want to buy one unless I have a reasonable expectation I can control it easily enough.
__________________
Quote:
Originally Posted by pendy
I'm here for the D's
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old September 26th, 2013, 04:27 PM
1of40's Avatar
1of40
Status: Offline
1of40
NAS 97SW & 83 One Ten Tdi
Member
 
Join Date: Dec 2003
Location: Potomac Falls & Wintergreen, Virginia
Posts: 6,075
Registry
Charles, Wally might be able to help you with tht question. I 've seen him up to his knees in LR3 wiring before.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #5  
Old September 26th, 2013, 04:32 PM
Jymmiejamz's Avatar
Jymmiejamz
Status: Offline
Jimmy
1995 D90 SW #365
Member
 
Join Date: Sep 2010
Location: Brooklyn, NY
Posts: 3,468
Registry
They're junk, I wouldn't want one. You'd be better off getting some newer style calipers that have the emergency brake built in. Its actuated by CAN bus, but its probably powered by a 12V motor. There is a circuit board inside of them.
Reply With Quote
  #6  
Old September 26th, 2013, 04:46 PM
MonLand
Status: Offline
Loic Fabro
95 D90 - 96 Disco -06 LR3
Member
 
Join Date: Oct 2003
Location: Herndon, VA - USA
Posts: 1,642
Registry
Well..... Thanks for asking.... I just invested close to one hour on this for the future!

The short is: I don't know!

Here is what I know:
- The emergency brake module is expensive (i.e. $400 or more).
- it acts on the rear wheels (I thought this was on the transmission, so I learnt something! )
- It has a 32 pin connector to the rest of the car that includes the connection to the CAN bus....
- connector is wired to get input from the switch, clutch pedal sensor (which would not be used with an auto?), a bunch of battery and ground connections and plenty of "not used" pins.

So.... The only way to tell at this point (unless someone with more knowledge shows up) would be to call the manufacturer or to test the operation of the module while disconnected from the CAN bus.

I would make the assumption that being a safety item, it must be able to operate when the other components in the car are dead. But... That's just me thinking out loud!

Good luck!
__________________
Quote:
I have an ex MoD and an ex wife. The two no longer conflict with each other.
Quote:
it is not hoarding it is selective collecting
---
MonLand
1995 D90 NAS
1996 Discovery NAS
2006 LR3 NAS (hers, but comfy! :) )
Reply With Quote
  #7  
Old September 26th, 2013, 04:58 PM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,623
Registry
Yes I was surprised to see it goes to the back wheels but I think Jason or someone already told me that once.

Sounds like it's managed via CAN bus. Not really a problem since I already talk CAN, but would need to sniff the packets and reverse engineer the messages. It makes sense that it's CAN since everything else is, and they have fancy logic like realizing when numbnuts is pushing the accelerator with it on and releasing it, and the smarts are probably in the ECU not the actuator.

I would use it to actuate the standard defender drum brake on the LT230 output. Jimmy, what part is junk? The actuator or the braking mechanism?

Except for the fact that I need a hand brake, it would be a nice "once it's on the road" project.
__________________
Quote:
Originally Posted by pendy
I'm here for the D's
Reply With Quote
  #8  
Old September 26th, 2013, 09:51 PM
Jymmiejamz's Avatar
Jymmiejamz
Status: Offline
Jimmy
1995 D90 SW #365
Member
 
Join Date: Sep 2010
Location: Brooklyn, NY
Posts: 3,468
Registry
Quote:
Originally Posted by cgalpin View Post

I would use it to actuate the standard defender drum brake on the LT230 output. Jimmy, what part is junk? The actuator or the braking mechanism?

Except for the fact that I need a hand brake, it would be a nice "once it's on the road" project.

There has to be a better option than this. The actuator is pretty prone to failure. I would guess that I've replaced at least 20 of them. The drum brakes that are mounted behind the disc brake rotor are junk too, but they are pretty cheap and easy to replace. If you are using this on an LT230 drum brake, I don't know what you would do with the second cable coming out of the actuator. The actuator works by tightening two cables that go to the parking brake drums located inside of the rear brake rotors. If they aren't adjusted properly, or one of the shoes has fallen apart (happens very often), the parking brake actuator will make a loud screeching noise and possible lock up, which could leave you stranded.
Reply With Quote
  #9  
Old September 27th, 2013, 02:02 AM
evilfij's Avatar
evilfij
Status: Offline
evilfij
I have never seen a rover in person
Member
 
Join Date: Oct 2003
Location: on the internet
Posts: 14,688
God why! Sounds like a terrible idea when the normal lever is so easy.
__________________
*not legal advice*
Reply With Quote
  #10  
Old September 27th, 2013, 08:25 AM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,623
Registry
Jimmy, I suppose you could tie one side to the frame and it would anchor the other. I dunno.

Ron, I am just looking at my options. My motor is in the tunnel which makes it considerably wider and so I can't use the stock location for the lever (and I already gave it to Bill). I don't think I'd like it on the passenger side and above the tunnel is too nice a spot for cup holders or a console of some sort. I think maybe a foot operated one like on older american cars might be a solution as well.
__________________
Quote:
Originally Posted by pendy
I'm here for the D's
Reply With Quote
  #11  
Old September 27th, 2013, 08:26 AM
MonLand
Status: Offline
Loic Fabro
95 D90 - 96 Disco -06 LR3
Member
 
Join Date: Oct 2003
Location: Herndon, VA - USA
Posts: 1,642
Registry
After the iEverything why not the eEverything?
__________________
Quote:
I have an ex MoD and an ex wife. The two no longer conflict with each other.
Quote:
it is not hoarding it is selective collecting
---
MonLand
1995 D90 NAS
1996 Discovery NAS
2006 LR3 NAS (hers, but comfy! :) )
Reply With Quote
  #12  
Old September 27th, 2013, 10:08 AM
evilfij's Avatar
evilfij
Status: Offline
evilfij
I have never seen a rover in person
Member
 
Join Date: Oct 2003
Location: on the internet
Posts: 14,688
Quote:
Originally Posted by cgalpin View Post
Jimmy, I suppose you could tie one side to the frame and it would anchor the other. I dunno.

Ron, I am just looking at my options. My motor is in the tunnel which makes it considerably wider and so I can't use the stock location for the lever (and I already gave it to Bill). I don't think I'd like it on the passenger side and above the tunnel is too nice a spot for cup holders or a console of some sort. I think maybe a foot operated one like on older american cars might be a solution as well.
Makes sense.
__________________
*not legal advice*
Reply With Quote
  #13  
Old September 27th, 2013, 11:08 AM
Jymmiejamz's Avatar
Jymmiejamz
Status: Offline
Jimmy
1995 D90 SW #365
Member
 
Join Date: Sep 2010
Location: Brooklyn, NY
Posts: 3,468
Registry
Quote:
Originally Posted by cgalpin View Post
Jimmy, I suppose you could tie one side to the frame and it would anchor the other. I dunno.
I just don't see that working, they are too sensitive to having the correct load. I would look in to using some rear calipers that have the parking brake actuators built in, such as on a Range Rover Evoque.
Reply With Quote
  #14  
Old September 27th, 2013, 11:11 AM
cgalpin's Avatar
cgalpin
Status: Offline
Charles Galpin
'94 D90 ST, '63 SeriesIIA
Site Team
 
Join Date: Jan 2004
Location: South Riding, VA
Posts: 11,623
Registry
Mmh, but I don't suppose they fit on a defender/rrc axle though do they?
__________________
Quote:
Originally Posted by pendy
I'm here for the D's
Reply With Quote
  #15  
Old September 27th, 2013, 05:07 PM
Jymmiejamz's Avatar
Jymmiejamz
Status: Offline
Jimmy
1995 D90 SW #365
Member
 
Join Date: Sep 2010
Location: Brooklyn, NY
Posts: 3,468
Registry
I highly doubt that. I imagine lots of new cars use this form of parking brake. I bet you can find something. I'm sure anything modern will be signaled via CAN bus.
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Non-Technical Discussions > Misc. Chit-Chat

Tags
ac, brake, lr3

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
emergency brake cable path and mount? lrna04 Defender Technical Discussions 5 July 13th, 2012 10:56 PM
Emergency Brake Part founD90 Wanted 3 September 15th, 2010 10:14 PM
Emergency Brake Cable Hardware CDeWan Wanted 0 February 5th, 2010 01:52 AM
Lucas Girling Brake Fluid chris snell Defender Technical Discussions 5 November 16th, 2005 10:59 AM
Emergency Brake Issues Ragland Defender Technical Discussions 10 April 7th, 2005 07:09 PM


All times are GMT -5. The time now is 10:19 AM.


Copyright