LSPV Removal

[Andy_B Member Find all posts View Profile Close Andy_B]

Just wondering if anyone has removed the LSPV (Load Sensing Proportional Valve). AS I hear removing it actually increase your braking power when one steep descents. Or you can add a manual adjuster too. I'm not to sure on how this really works, maybe someone know a little more about the LSPV

http://www.summitracing.com/parts/SUM-G3905/

Cheers

Andy

[Taresk Member Find all posts View Profile Close Taresk]

Re: LSPV Removal

I doubt that'd be road legal, if you get the bias wrong the rears can lock up under heavy braking, and you can lose control.

[waltec Senior Member Find all posts View Profile Close waltec]

Re: LSPV Removal

Have you had a suspension upgrade??

The reason I ask as our work troopie had a suspension upgrade, and the LSPV wasn't adjusted to suit. We were always disapointed with the braking performance (vehicle had a GVM upgrade so was always over 3.5t). After doing a web search we found that some lift kits come with spacer blocks for the LSPV. We then spoke to the original installer and he said it wasn't required.

We then contacted an installer of the kits that have the spacer, we took the Troopie to him, where we performed a couple of brake tests, and found that the decelaration was only just within legal limits. They then installed the spacer block, and then measured presures at all 4 wheels, made a few more little tweaks of the LSPV, to get presures spot on. Brake test were done again and they were much better.

Everyone who drove the vehicle, commented how much better the brakes were!

Makes sense when you think about it, if you install a suspension lift kit this will raise the rear suspension, so as far as the LSPV is conserned the rear is high so no load, so reduced rear braking. We run our troopie heavy all the time (work truck so alway has gear in it), so we took it full loaded to the suspension place as we wanted the braking the best it could in its normal heavy form, that being said the few times its driven empty, brakes are still good.

Not sure of the workshop we used, Driveline services is in my mind but will try to double check this next week.

Matt

[Derb Senior Member Find all posts View Profile Close Derb]

Re: LSPV Removal

Hi Andy. Shit man! Don't disconnect the load sensing valve. There is a F__________g good reason that valve is there! With a good load on board, the back of the vehicle squats down, the link lifts up and the valve opens up a port and allows greater braking on the rear axle. When you are lightly loaded the vehicle sits higher, the link drops down and the port is proportionaly closed reducing the braking effect to the rear axle thus stopping the rear brakes from locking up and the back going around. If you fit a lift kit to the Prado you may choose to have the link/valve assy recalibrated to work correctly. These valves work great when set up correctly. Cheers.

[KZJ90 Member Find all posts View Profile Close KZJ90]

Re: LSPV Removal

Just wondering if anyone has removed the LSPV (Load Sensing Proportional Valve). AS I hear removing it actually increase your braking power when one steep descents. Or you can add a manual adjuster too. I'm not to sure on how this really works, maybe someone know a little more about the LSPV

http://www.summitracing.com/parts/SUM-G3905/

Cheers

Andy

I think it makes more bad than good for braking if you have ABS-brakes. I have tighted the spring together, means the valve not move any = same situation than without the valve. Now I have rear Brakes. I have never had any situations what for the valve is there, I mean rear brakes are not allowed to be more powerful than the fronts. I have driven on icy roads, never got the rear end slide over. ABS helps.