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Incorrectly set or dodgy load sensing valve can have an effect on braking performance.
Insufficient or intermittent vacuum will definitely have the effect on braking pressure application as pressure loss/assist will affect the outcome.
Incorrect master cylinder will affect braking pressures. I wonder if you have correct one!
Finally standard Y61 brakes except on 4.8L engined ones are chit! Generally softer pads will improve braking performance but wear out quicker.
4.8 L brake pads (Nissan OEM) will fit to ZD30/TD42 brake calipers and they're an improvement.
We bled the brakes, putting about 3 litres through and then Nissan did the same. Having said that, we could only bleed one port on the ABS unit so there is still a chance that there is an airlock in that.
The vacuum sounds more like a air pump than a steady vacuum and that could well be the culprit....
I will remove the ABS fuse and see what that does....
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2006 Ser IV GU, 6.5l TD V8 Chev with 4spd Auto, 3in Lift, 35in Kumho's, 12000lb winch, Nissan snorkel, Diff breathers, lightbar + Lightforce HD spots on roofrack. Built to go bush.
2006 Ser IV GU, 6.5l TD V8 Chev with 4spd Auto, 3in Lift, 35in Kumho's, 12000lb winch, Nissan snorkel, Diff breathers, lightbar + Lightforce HD spots on roofrack. Built to go bush.
with the poor braking, hows the pedal, firm? soft? high or low? will it lock wheels or at least trigger the abs if you nail the brakes suddenly? maybe remove the abs fuse and do a little test to see if it will actually lock the fronts if you slam on the brakes
Rear diff where the brake line tees off for the rear wheels... it senses the vehicle load and proportions the amount of braking pressure between front to rear axles
Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.
Went through the same thing some time ago. Ended up being the LPV. Most brake "specialists" don't even know it is there. When I eventually bled it the brakes were much better but because it had not been bled since the Patrol was built the LPV was stuffed. I repleced it and the brakes are now perfect.
if you have raised suspension the lsv may not be portioning enough of the braking effort to the rear wheels . some suspension mobs make a plate that they sell as apart of their kits that lowers the valve to the correct position depending on the height of the lift ( I think arb-ome ) .
WHAT IS I T – A TECHNICAL EXPLANATION
A load sensing proportioning valve system for the hydraulic brake system of passenger cars and
the like for varying the amount of brake fluid pressure and thus the braking torque at the rear
brakes of a passenger car.
It is located on the RHS above rear axle.....
Regards
Last edited by Rumcajs; 7th June 2015 at 08:59 PM.
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Originally Posted by Gecko17
