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Extended bracket for Load sensing proportioning valve (lspv)
http://auszookers.com/forum/viewtopic.php?f=14&t=29889		 Page 1 of 1
Author:  zukenutter [ Wed Jan 25, 2012 6:38 am ]
Post subject:  Extended bracket for Load sensing proportioning valve (lspv)
Made a extended bracket for my Load sensing proportioning valve (lspv). Its the spring attached to your rear pumpkin.

When you raise the suspension of a Jimny to regain proper brake balance this is necessary. The final positioning should see the axle housing end of the spring being slightly higher than the valve lever end. The amount to lengthen it by is the same amount the suspension has been raised. The lever should be in a relaxed position when finished.

I have seen one advertised on the Jimny bits site but to save $30 made one myself from a bit of gal shelf brace I had sitting around. Really easy to make, took about a 1/2 an hour including fitting etc. Brakes are much better balanced front-to-rear now.

The finished item

Image

Pinched this manual page from MOAG's thread.

Image
Author:  brindog [ Wed Jan 25, 2012 7:05 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
Will have to make one of these up. Cheers Zukenutter. :goodjob:
Author:  zukenutter [ Wed Jan 25, 2012 7:10 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
brindog wrote:
Will have to make one of these up. Cheers Zukenutter. :goodjob:


Timely :wink:
Author:  monley [ Wed Jan 25, 2012 7:25 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
Good work Mr nutter :P

brindog wrote:
Will have to make one of these up. Cheers Zukenutter. :goodjob:



Don't you have ABS?
Author:  Benz [ Wed Jan 25, 2012 7:37 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
do abs jimnys not have these?
Author:  monley [ Wed Jan 25, 2012 7:38 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
Benz wrote:
do abs jimnys not have these?


Nope! :)
Author:  Moag [ Wed Jan 25, 2012 8:19 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
:lol: Yours looks so shiny compared to the one i made..

Good job Mr Nutter.
Author:  Scales [ Wed Jan 25, 2012 9:15 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
ive been meaning to do this for ages....

can you notice the difference a heap? or is it fairly minimal?
Author:  Moag [ Wed Jan 25, 2012 9:24 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
Does your back breaks lockup during hard breaking :wink:

I didn't do the before and after thing..
Author:  suzooky87 [ Wed Jan 25, 2012 9:35 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
Nice work there mate :)
Author:  zukenutter [ Wed Jan 25, 2012 12:18 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
My brakes are definitely much better now. Even in the current wet conditions I have been able to hit the brakes much harder than I used to with no lockup.
Author:  zukenutter [ Wed Jan 25, 2012 8:39 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
monkey wrote:
Good work Mr nutter :P

brindog wrote:
Will have to make one of these up. Cheers Zukenutter. :goodjob:



Don't you have ABS?



:helloo: NOPE!! :D


Is why I could do this

Image



EDIT: Oh you mean brindog :oops:
Author:  brindog [ Thu Jan 26, 2012 3:08 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (lspv)
^^ :lol:
nah 07. 8)
08's when abs started. Hate to have ABS :thefinger: :lol:
Author:  kyzermattingley [ Tue Feb 07, 2012 8:48 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
I just disconected mine and zip tied it up out of the way, works fine and have had no problems with rear lock ups

Kyzer
Author:  zukenutter [ Tue Feb 07, 2012 8:54 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
kyzermattingley wrote:
I just disconected mine and zip tied it up out of the way, works fine and have had no problems with rear lock ups

Kyzer



I think that's a better option than just raising the suspension and leaving it connected. I'm not sure exactly which way the bias is meant to go but I found with it still connected that I had too much bias towards the front during heavy braking.
Author:  christover1 [ Tue Feb 07, 2012 12:23 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
I adjusted mine, looks still connected, but brake bias is contant.
It was a real pain having variable rear bias down loose steep hills.
I now have good brake balance, that is predictable.

But this is an off road only solution ;)
I like the idea of an extension to allow for lift,
smarter option for legality and safety.
Author:  zukenutter [ Tue Feb 07, 2012 12:31 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
I had an in-cab choke cable in my old Jimny rigged to the lever so I could play around with the bias. Never really used it though :oops:
Author:  christover1 [ Tue Feb 07, 2012 12:38 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
Mine being a LWB it is quite heavier at the rear than a swb softy,
and I carry a bit of weight in the rear, too,
so it may be a different story for everyone else.
Author:  GraphicX [ Mon Jul 07, 2014 11:04 am ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
sorry for old bump.

i tried to make an adjustment bracket on the weekend but don't appear to have had much success (actually made 2, one slightly different for more tension).

basically chucked the bracket in & had someone jump on the tow ball to see if any adjustment occurred & it didn't. then removed the spring & had them apply the brake to see if anything would happen & it never (had the hand brake off & the wheels chocked).

does any one know how the valve is meant to work ? i'm guessing when the brake is applied the lever will try & open to the left, but the spring will restrict it based on the ride height of the car. is this correct or am i missing something ??

thanks for your help as always.
Author:  atari4x4 [ Mon Jul 07, 2014 12:01 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
as you add more load to the rear, it adds more rear brake bias. so the more you compress the rear end the less tension is on the spring letting the arm move which lets more pressure to the rear brakes.

what you are wanting to do is to get it back to the standard position at ride height.
Author:  GraphicX [ Mon Jul 07, 2014 1:35 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
well when i even remove the spring completely & depress the brakes the valve doesn't do much more than move a couple of mm, yet if i move it by hand i can move it over an inch. could it be faulty or possibly not bled properly ?
Author:  zukenutter [ Mon Jul 07, 2014 1:49 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
On a Jimny, the standard position at the point that the springs attaches to the axle bracket is slightly higher than where the spring attaches to the ISPV lever (spring is almost parallel to the ground. On a Jimny it actually pulls on the lever as you load the rear or as you brake hard. Engagement of the valve only requires a small amount of lever movement. When there is no load, the spring should be slightly loose, when you apply load in the rear the sprung mass moves down toward the axle, thus stretching the spring and pulling the lever.

When I did mine I had a stock Jimny alongside to work from. Worth climbing under a stocky so you can see how they look when stock.


GraphicX wrote:
well when i even remove the spring completely & depress the brakes the valve doesn't do much more than move a couple of mm, yet if i move it by hand i can move it over an inch. could it be faulty or possibly not bled properly ?


engagement is only a couple of mm movement, the rest is just free play
Author:  GraphicX [ Mon Jul 07, 2014 2:39 pm ]
Post subject:  Re: Extended bracket for Load sensing proportioning valve (l
thanks for that nutter, looks like my second attempt at a bracket was fine, had a slight bit of free play & had the spring sitting slightly upwards. will have to refit it =)
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