HPP PRX Se pedal problem

[Kek700]

I have some HPP PRX pedals, I really wanted to see if all the positive reviews are justified about hydraulic pedals.
Unfortunatly mine have a lot of initial stiction, you could say a notch‘y start.
After that they are rather good, but every time I press them I have to go through a notch‘y start.
This is very annoying, it spoils their overall affect.
Has anyone got an answer, I have tried silicon spray, i just put it on the master and slave push shafts to some affect, soon back to that notch’y start.
Sorted.

 

[Chris Dawson]

I turned on my rig after not using it for a while, and seem to have lost the brake axis from my HPP PRX pedals. Both the clutch and accelerator report fine, but instead of the brake axis, I now have a HAT (POV) switch being reported.

Help! Any ideas how I get my brake back?

 

[Kek700]

No. so i will go though the obvious. i use DIView
that shows BU0836A under Edit Device Interface.
that shows
Z Axis box ticked Accelerator
Y Axis box ticked Brake
I just use brake and accelerator.
Simcube, mouse and keyboard Unticked.

Sorry about the simplistic explanation , but that is it.

 

[stigs2cousin]

Can you measure the resistance of the pressure sensor?

I mean if the resistance changes gradually with brake input or just in one jump which would mean that the pressure sensor has crapped the bed.

 

[Kek700]

Carsten is right, he just reminded me that there have been a number of pressure sensor problems on these brakes, I remembered that because the sensor is expensive.
I can imagine with a bit of research you may find a cheaper alternative.

 

[Chris Dawson]

Hi guys, thanks for the help!

I have taken the cover off the controller and checked the wiring to see if anything obvious has broken or come loose. How do I check that the pressure transducer is working? I have a multimeter, which of the connections do I need to probe? If it is broken is there a standard drop-in replacement, or do I need to spend ~£120 getting one from Motion Simulation?

 

[Kek700]

First. one supply from the BU0836A should give 5V I think , DC supply.
The others are ground and output. ( you can use one of the other sensor outputs to get a reference ) ( i do not have a multimeter with me )
With the multi-meter on the ground and to the signal output, somehow press the brake pedal and monitor the signal output voltage to ground.
Should vary in a obvious way to pedal pressure.
if you have a static or no output.
Then i would inspect the wiring of the sensor.
Failing all this we can all see if we can source a part at a sensible price, as it is in all our interests to do this.
In fact i will start now...

The details have rubbed off my pressure sensor, any chance you could post them here.

 

[Chris Dawson]

 

[stigs2cousin]

This should be a standart part, 120$ seems a smidge excessive.

Every pressure sensor with the right range and thread should work, especially as you can cal7brate it with DiView.

 

[Kek700]

Page Not Found - Aliexpress.com

As an example of what may work???

 

[richie12a]

Sorry to revive an old thread!
I think I need to bleed the brake pedal on my HPP's...
Does anyone have any insight as to the correct fluid to use?
Thanks!
Richie