Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

eliminate load sensing proportioning valve?

Old 05-04-2009, 05:31 PM
  #1  
Registered User
Thread Starter
 
bonehead's Avatar
 
Join Date: May 2009
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
eliminate load sensing proportioning valve?

i was wondering if anyone has taken this vale out and how it worked i am considering doing it my self
Old 05-04-2009, 05:37 PM
  #2  
Contributing Member
iTrader: (3)
 
BigBluePile's Avatar
 
Join Date: Dec 2006
Location: Sedro-Woolley, WA
Posts: 15,177
Received 178 Likes on 124 Posts
Why? Did you do a rear disc brake conversion? Why?

Ah, and Welcome to Yotatech!! Remember, searching is your friend!!!
Old 05-04-2009, 05:40 PM
  #3  
Registered User
 
rdrttoy's Avatar
 
Join Date: Apr 2009
Location: Las Vegas
Posts: 97
Likes: 0
Received 0 Likes on 0 Posts
i just tied it up with wire. it works really well. i havnt had any problems with it. just sometimes under hard breaking the rear end of the truck will start to skid. but other than that it works great.
Old 05-04-2009, 05:56 PM
  #4  
Registered User
 
Flash319's Avatar
 
Join Date: Feb 2006
Location: Barrie, Ontario CANADA
Posts: 1,730
Likes: 0
Received 0 Likes on 0 Posts
I yanked all that crap off. One line going to the back from tha master. Works perfect. Did it to my runner and my pickup.
Old 05-04-2009, 08:19 PM
  #5  
Registered User
 
turborich's Avatar
 
Join Date: Jan 2009
Location: Las Vegas, NV.
Posts: 296
Likes: 0
Received 1 Like on 1 Post
Why are you guys removing the valve? Isn't it there for a reason?
Old 05-04-2009, 08:55 PM
  #6  
Registered User
 
Baja Toy's Avatar
 
Join Date: May 2009
Location: Escondido, CA
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
I was about to post the same question as bonehead. My rear end took a crap and I found a Tacoma TRD rear with an e-locker so I bought it and installed it. I reinforced the Tacoma rear end since I had the chance, but I don't want to weld brackets again to install the rod leading to the LSPV.
So if I leave it out, I'll be ok? What could go wrong?
Old 05-05-2009, 01:14 PM
  #7  
Registered User
 
Flash319's Avatar
 
Join Date: Feb 2006
Location: Barrie, Ontario CANADA
Posts: 1,730
Likes: 0
Received 0 Likes on 0 Posts
I took them out because of 2 things.

A. 3 rotten lines to look after
B. pain in the $ss to bleed the brakes.
Old 05-05-2009, 02:13 PM
  #8  
Registered User
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes on 4 Posts
@bonehead- search the forums for LSPV and you should get quite the abundance of responses with all the information you need.

@Baja Toy- as mentioned, the main thing that can happen is that under hard braking and light loading the rear wheels will lock up before the front wheels and cause the rear to slide around on you. At least put a manual proportioning valve in so you can have some control over the braking force when loaded / unloaded.

@Flash319- you're just lazy.
Old 05-05-2009, 03:16 PM
  #9  
Registered User
 
algranger's Avatar
 
Join Date: Aug 2007
Location: Here in the PNW
Posts: 3,371
Likes: 0
Received 3 Likes on 3 Posts
Idk why you would want to remove it but you can cut it off and add a manual proportioning valve in line somewhere
Old 05-05-2009, 03:56 PM
  #10  
Registered User
 
turborich's Avatar
 
Join Date: Jan 2009
Location: Las Vegas, NV.
Posts: 296
Likes: 0
Received 1 Like on 1 Post
I just bled my brakes & my valve is still there, I had no problems what so ever.
Old 05-05-2009, 04:10 PM
  #11  
Contributing Member
iTrader: (3)
 
BigBluePile's Avatar
 
Join Date: Dec 2006
Location: Sedro-Woolley, WA
Posts: 15,177
Received 178 Likes on 124 Posts
Originally Posted by abecedarian
@Baja Toy- as mentioned, the main thing that can happen is that under hard braking and light loading the rear wheels will lock up before the front wheels and cause the rear to slide around on you. At least put a manual proportioning valve in so you can have some control over the braking force when loaded / unloaded.
x2.

That rod also makes a sweet place to zip tie your diff breather hose to!
Old 05-05-2009, 04:12 PM
  #12  
Registered User
 
Flash319's Avatar
 
Join Date: Feb 2006
Location: Barrie, Ontario CANADA
Posts: 1,730
Likes: 0
Received 0 Likes on 0 Posts
@Flash319- you're just lazy. [/QUOTE]

Smart people seam lazy sometimes because it is so effortless

oh ya and I have said it a hundread times before, there is no such thing as a manual proportioning valve that you can put inline. And if there is someone please explain to me where the pressure goes.


Thats what I thought.

Last edited by Flash319; 05-05-2009 at 04:15 PM.
Old 05-05-2009, 04:24 PM
  #13  
Registered User
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes on 4 Posts
Originally Posted by Flash319
@Flash319- you're just lazy.
Smart people seam lazy sometimes because it is so effortless

oh ya and I have said it a hundread times before, there is no such thing as a manual proportioning valve that you can put inline. And if there is someone please explain to me where the pressure goes.


Thats what I thought.
uh... a pressure reducing valve that can have the bias between input and output pressures adjusted manually is a manual proportioning valve and they've been around just about as long as hydraulics have. You've got them on the natural gas and water mains to your house / apartment / condo... and maybe your bbq grill... but they call them 'regulators'.

Last edited by abecedarian; 05-05-2009 at 04:26 PM.
Old 05-05-2009, 04:25 PM
  #14  
Contributing Member
iTrader: (3)
 
BigBluePile's Avatar
 
Join Date: Dec 2006
Location: Sedro-Woolley, WA
Posts: 15,177
Received 178 Likes on 124 Posts
Originally Posted by Flash319
oh ya and I have said it a hundread times before, there is no such thing as a manual proportioning valve that you can put inline. And if there is someone please explain to me where the pressure goes.


Thats what I thought.
Huh? Guess I'll go take a picture of mine then...
Old 05-05-2009, 04:28 PM
  #15  
Registered User
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes on 4 Posts
when the pressure gets too high, the pressure blocks itself- not too hard to consider if there's a spring that adds its pressure to the valve.
Old 05-05-2009, 04:29 PM
  #16  
Contributing Member
iTrader: (3)
 
BigBluePile's Avatar
 
Join Date: Dec 2006
Location: Sedro-Woolley, WA
Posts: 15,177
Received 178 Likes on 124 Posts
Old 05-05-2009, 04:31 PM
  #17  
Contributing Member
iTrader: (3)
 
BigBluePile's Avatar
 
Join Date: Dec 2006
Location: Sedro-Woolley, WA
Posts: 15,177
Received 178 Likes on 124 Posts
Old 05-05-2009, 04:31 PM
  #18  
Registered User
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes on 4 Posts
say you've got a pressure source of 1600 PSI and you want to be able to limit it to 1400 PSI... if you have a spring on a valve that applies 400 PSI, and the preload on that spring is adjustable, you can turn in the adjuster so that the 1600 of the fluid fed back into a valve that when the 400 of the spring is added to is enough to cut off the fluid supply until the fluid pressure drops below a certain value.
Old 05-05-2009, 04:36 PM
  #19  
Registered User
 
Justinlhc's Avatar
 
Join Date: Feb 2009
Posts: 590
Likes: 0
Received 0 Likes on 0 Posts
I removed mine and have since removed my MPV because of a leak and some stripped threads. I must have an air bubble in the rear line because my brakes feel great and the back end never locks up. Could also be the rear anti-lock working for me........
Old 05-05-2009, 04:42 PM
  #20  
Registered User
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,723
Likes: 0
Received 4 Likes on 4 Posts
Originally Posted by Justinlhc
I removed mine and have since removed my MPV because of a leak and some stripped threads. I must have an air bubble in the rear line because my brakes feel great and the back end never locks up. Could also be the rear anti-lock working for me........
whoa... nice deflection!!!
"... must have an air bubble... back end never locks up."
slick
"Could also be the rear anti-lock...." for the 3-point score?

Thread Tools
Search this Thread
Quick Reply: eliminate load sensing proportioning valve?



All times are GMT -8. The time now is 10:04 AM.