hydraulic brake noise

[boondockdad]

2008 s/o
electric-hydraulic brakes
P3 controller
brakes weren't making noise at prep/delivery- but did seem to have a delayed response...

2 hr drive home... backing up parking... brakes sound like an upright vacuum cleaner... maybe louder even, over the noise of the 496 big block

???

[boondockdad]

could this be a bleed issue... actibrake manual requires a second bleed after first 100 miles...

[uwe]

Originally Posted by finalcutjoe

2008 s/o
electric-hydraulic brakes
P3 controller
brakes weren't making noise at prep/delivery- but did seem to have a delayed response...

2 hr drive home... backing up parking... brakes sound like an upright vacuum cleaner... maybe louder even, over the noise of the 496 big block

???

The actibrake will make some noise, after all it is a substantial electric motor and a high pressure pump. Typically, you can not hear it inside the truck while towing, but you can hear it from the outside of the trailer.
If it is louder than a hum, then there might be something wrong with the pump.

[boondockdad]

talked with Mike at actibrake... said the pump is noisy... but thats the tradeoff for getting 1600psi to the calipers...

the brake response time is a good 2-3 second delay... not good

adjusting the gain, i can lock 'em up no problem... dialing it down, i can get them to stop the whole rig beautifully... but there's that delayed response...

Mike was 99% sure its a bleed issue...

bled lines last night... looked like root beer float coming out of there, lots of air and foam.... i wasn't able to hook up and test it... will be pulling it this weekend... i'm sure that was the problem...