is it still posible to get a proportioning valve for a torana? or even a reco kit i can buy and fit it myself.
Edited by brendan_h, 10 November 2009 - 05:37 PM.
lj torana rear brakes locking up
Started by
_brendan_h_
, Nov 10 2009 05:36 PM
24 replies to this topic
#1
_brendan_h_
_brendan_h_
-
- Guests
Posted 10 November 2009 - 05:36 PM
rear brake in the torana are locking up under hard braking. it doesnt feel like the front are working all that good either though after a test run i sprayed a little water on the front disk and it boiled off instantly.
is it still posible to get a proportioning valve for a torana? or even a reco kit i can buy and fit it myself.
is it still posible to get a proportioning valve for a torana? or even a reco kit i can buy and fit it myself.
#2
dattoman
-
- Administrators
-
- 16,486 posts
Do I feel lucky? Well, do ya, punk?
- Name:Neil
- Location:Perth Western Australia
- Car:LX SS , 76 Cadillac , 3 x dattos
- Joined: 04-February 07
Posted 10 November 2009 - 07:21 PM
What have you done recently that might have changed the way the car brakes ?
No point putting in a valve to mask the symptoms of rear lockup if your fronts aren't working correctly
All you do is reduce the braking efficiency of the car
LJ's didn't run a prop valve anyway... they do have a switch block but it doesn't proportion
Its done with rear wheel cylinder v's caliper sizes
No point putting in a valve to mask the symptoms of rear lockup if your fronts aren't working correctly
All you do is reduce the braking efficiency of the car
LJ's didn't run a prop valve anyway... they do have a switch block but it doesn't proportion
Its done with rear wheel cylinder v's caliper sizes
#3
_Squarepants_
_Squarepants_
-
- Guests
Posted 10 November 2009 - 07:32 PM
Drum rear brakes? If so, it's prolly a sticky cylinder. Replace them and try again.
#4
_brendan_h_
_brendan_h_
-
- Guests
Posted 10 November 2009 - 08:12 PM
well ivew had the car for 4 weeks now and since i got it been shit. i replaced the booster and master cause they seen better days and now the brake work good apart from the rears locking.
might help, the handbrake also sort of dont grab like any other handbrake i have used, sort of only just grabs or grabs fully.
also dattoman are you sure they didnt have a prop valve? the one on there now has a nut on the end which looks like it cn unscrew and ive seen a pic of the same type and it had a few springs and seals.
might help, the handbrake also sort of dont grab like any other handbrake i have used, sort of only just grabs or grabs fully.
also dattoman are you sure they didnt have a prop valve? the one on there now has a nut on the end which looks like it cn unscrew and ive seen a pic of the same type and it had a few springs and seals.
Edited by brendan_h, 10 November 2009 - 08:15 PM.
#5
_@milco@_
_@milco@_
-
- Guests
Posted 10 November 2009 - 09:55 PM
datto man know's his stuff mate...........
change your rear cylinders.....
change your rear cylinders.....
#6
Heath
View Garage
-
- Administrators
-
- 18,375 posts
I like cars.
- Name:Heath
- Location:Eastern Suburbs, Melbourne
- Car:Heavily Modified UC Sunbird Hatchback
- Joined: 07-November 05
View Garage
Posted 10 November 2009 - 10:12 PM
Couldn't that also be caused by lipping in the drums? I know when they need machining the rear end is very prone to locking up...
#7
dattoman
-
- Administrators
-
- 16,486 posts
Do I feel lucky? Well, do ya, punk?
- Name:Neil
- Location:Perth Western Australia
- Car:LX SS , 76 Cadillac , 3 x dattos
- Joined: 04-February 07
Posted 11 November 2009 - 01:28 AM
Theres lots of causes
Some aren't even brakes
Dud shocks can cause lockup ... or a soft spring
Sounds like a brake shop needs a closer look
I'd take a look for you... but bit far away
And yes they have a block... with a shuttle valve inside... and a nut on the end
But no proportioning
Unless someones stuck something on it that shouldn't be there
pics ?
Some aren't even brakes
Dud shocks can cause lockup ... or a soft spring
Sounds like a brake shop needs a closer look
I'd take a look for you... but bit far away
And yes they have a block... with a shuttle valve inside... and a nut on the end
But no proportioning
Unless someones stuck something on it that shouldn't be there
pics ?
#8
ls2lxhatch
-
- Members
-
- 5,332 posts
- Location:Perth
- Car:LX Hatch
- Joined: 29-May 06
Posted 11 November 2009 - 03:24 AM
Distribution block and brake fail switch.
Distribution block, brake fail switch and proportioning valve.
Distribution block, brake fail switch and proportioning valve.
#9
_brendan_h_
_brendan_h_
-
- Guests
Posted 11 November 2009 - 06:30 AM
Distribution block and brake fail switch.
Distribution block, brake fail switch and proportioning valve.
i have forgoten what i have now will have a look when i get home.
think ill replace the rear wheel cylinders first as there only 30bucks a pair
#10
dattoman
-
- Administrators
-
- 16,486 posts
Do I feel lucky? Well, do ya, punk?
- Name:Neil
- Location:Perth Western Australia
- Car:LX SS , 76 Cadillac , 3 x dattos
- Joined: 04-February 07
Posted 11 November 2009 - 10:47 AM
P5573 is the correct # for a disc front car
Give the drums a light machine and stuff some new shoes in there too
N1132 is the shoe # from memory
Give the drums a light machine and stuff some new shoes in there too
N1132 is the shoe # from memory
#11
_brendan_h_
_brendan_h_
-
- Guests
Posted 11 November 2009 - 03:10 PM
P5573 is the correct # for a disc front car
Give the drums a light machine and stuff some new shoes in there too
N1132 is the shoe # from memory
do you know who makes them?
#12
dattoman
-
- Administrators
-
- 16,486 posts
Do I feel lucky? Well, do ya, punk?
- Name:Neil
- Location:Perth Western Australia
- Car:LX SS , 76 Cadillac , 3 x dattos
- Joined: 04-February 07
Posted 11 November 2009 - 03:41 PM
They are industry numbers... any auto parts shop will recognise the numbers
#13
_bathurst-racer_
_bathurst-racer_
-
- Guests
Posted 11 November 2009 - 08:19 PM
The rear brakes on my LJ started to lock up severly so I checked the brakes all round. There wasn't anything obviously wrong so I took the proportioning valve to Brake Pro. It didn't need re sleeving so 2 days and $100 and all was right again.
#14
_brendan_h_
_brendan_h_
-
- Guests
Posted 11 November 2009 - 08:55 PM
The rear brakes on my LJ started to lock up severly so I checked the brakes all round. There wasn't anything obviously wrong so I took the proportioning valve to Brake Pro. It didn't need re sleeving so 2 days and $100 and all was right again.
that contradicts that lj didnt have proportioning valves. they onyl have them in the master cylinders
#15
dattoman
-
- Administrators
-
- 16,486 posts
Do I feel lucky? Well, do ya, punk?
- Name:Neil
- Location:Perth Western Australia
- Car:LX SS , 76 Cadillac , 3 x dattos
- Joined: 04-February 07
Posted 11 November 2009 - 09:07 PM
They don't have them at all
Not in the master
Not on the rail
They have a switch block (as pictured above)... thats all ... its not a prop valve
And $100 and 2 days for.....um... 2 orings and a hone ... nice work if you can get it
Not in the master
Not on the rail
They have a switch block (as pictured above)... thats all ... its not a prop valve
And $100 and 2 days for.....um... 2 orings and a hone ... nice work if you can get it
#16
_brendan_h_
_brendan_h_
-
- Guests
Posted 12 November 2009 - 11:11 AM
They don't have them at all
Not in the master
Not on the rail
They have a switch block (as pictured above)... thats all ... its not a prop valve
And $100 and 2 days for.....um... 2 orings and a hone ... nice work if you can get it
i ment wheel cylinders.
so they dont have them in the wheel cylinders or they do?
would putting in a prop valve be a good move?
#17
_NZ Toranaman_
_NZ Toranaman_
-
- Guests
Posted 12 November 2009 - 03:13 PM
Does it lock under slow pressure or does it lock them under a stab on the peddle as it may be your vacuam booster unit, I was told about this happening when it needs an overhaul.
#18
_brendan_h_
_brendan_h_
-
- Guests
Posted 12 November 2009 - 03:15 PM
Does it lock under slow pressure or does it lock them under a stab on the peddle as it may be your vacuam booster unit, I was told about this happening when it needs an overhaul.
brand new reco booster and master cylinder in it. the car is off the road for a few days while i fit the SUs. when i fitted the new booster and master cylinder i only got a short 5min drive
#19
Posted 12 November 2009 - 04:25 PM
Is is braking well overall? It kind of sounds to me like the first thing to deal with is the front brakes
#20
_Squarepants_
_Squarepants_
-
- Guests
Posted 12 November 2009 - 06:38 PM
If the fronts are hot enough to boil water off then it sounds like they're working. Whether both of them are working evenly is yet to be discussed, but he said he sprayed water on "them" so I assume he did it to both.
After all, all brakes do is convert kinetic energy into heat.
BTW spraying water on your discs when they're hot is a good way to warp them, so don't get into a habit with that BH.
After all, all brakes do is convert kinetic energy into heat.
BTW spraying water on your discs when they're hot is a good way to warp them, so don't get into a habit with that BH.
#21
Posted 12 November 2009 - 06:48 PM
Maybe the fronts cooked first, who knows, just seems to me from the description in the first post that they are being overlooked
#22
_brendan_h_
_brendan_h_
-
- Guests
Posted 12 November 2009 - 07:26 PM
yer i dont realy know what the go is. but somone said earlyer the rear could be locking due to soft springs. and yes it is soft, was told when i got it thats some decenct shocks would be best as its already got lowered springs. will have to do some testing once i get it back on the road
#23
_Squarepants_
_Squarepants_
-
- Guests
Posted 12 November 2009 - 10:08 PM
Valid point.Maybe the fronts cooked first, who knows, just seems to me from the description in the first post that they are being overlooked
Brendan, do the rears lock up every time you stand on the brakes or just after you've given them a hard time?
I can't imagine why the discs would over heat before the drums, but worth thinking about I suppose.
#24
orangeLJ
-
- Members
-
- 10,261 posts
Yes, yes I do post alot!
- Joined: 02-May 06
Posted 16 November 2009 - 10:37 AM
Change your rear wheel cylinders.
There are two types that fit, one is for drums all round, others is for drum rear.
When I was trying to sort out a new cylinder for the drums on the back of the LJ, I was sold the wrong kind (my fault, it was all they had in stock and I needed it then and there and figured it would fit)
Old man tried to tell me what would happen, I tried it, yup... rear brakes locked every time I braked.
There are two types that fit, one is for drums all round, others is for drum rear.
When I was trying to sort out a new cylinder for the drums on the back of the LJ, I was sold the wrong kind (my fault, it was all they had in stock and I needed it then and there and figured it would fit)
Old man tried to tell me what would happen, I tried it, yup... rear brakes locked every time I braked.
#25
S pack
-
- Members
-
- 15,681 posts
Scrivet Counter
- Name:Dave
- Location:Luggage Point
- Car:73 LJ
- Joined: 25-January 10
Posted 31 December 2014 - 08:12 AM
Old thread I know but I'm surprised no one mentioned brake fluid contamination of the brake shoes will cause the lock up the OP was dealing with.
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users
