Disc brake lag

[wildwoodrver]

Just upgraded to Kodiak discs, driven with a Titan BrakeRite EHB, and controlled with a new Tekonsha P3.
There is a 1.5 second delay before the trailer brakes apply, as measured with the manual control.
We've bled the brakes 4 times and checked voltage on both the constant and application wires at the actuation device. (With Titan support on the phone....all normal).

Getting worried about losing precious time in a panic. Love the way they work otherwise.
Any ideas?.....thanks.

[Inland RV Center, In]

Originally Posted by wildwoodrver

Just upgraded to Kodiak discs, driven with a Titan BrakeRite EHB, and controlled with a new Tekonsha P3.
There is a 1.5 second delay before the trailer brakes apply, as measured with the manual control.
We've bled the brakes 4 times and checked voltage on both the constant and application wires at the actuation device. (With Titan support on the phone....all normal).

Getting worried about losing precious time in a panic. Love the way they work otherwise.
Any ideas?.....thanks.

Sounds like there is a problem with the actuator.

That time lag, is a safety hazard.

Andy

[3Ms75Argosy]

hmmm... are you sure you have the right EHB? There's a 1000 psi one for drum brakes, and a 1500 for disks.
The correct one has part # 4813100
Failing that, it seems like you might have a defective actuator.
Marc

[wildwoodrver]

I double checked....it is the right part number.

It keeps telling me the actuation system is defective. That is sort of last resort, and if I have to change it I might opt for a different brand....you sort of loose faith when a product doesn't work as advertised.

Getting used to the lag, but of course I get a Hensley bump if I hit the foot brake hard at speed.

Thanks.

[rluhr]

I agree with Andy, you can't live with that big of a delay in trailer braking action. In the right conditions (panic stop), the lag could give the trailer a chance to push you off-center and out of control.

Since you've already done tech support (and thereby given Titan a fair chance to resolve the problem), my next step would be to investigate returning the unit and replacing with another make of actuator.

[boondockdad]

Did you get this resolved?

[ROBERT CROSS]

Originally Posted by wildwoodrver

Getting used to the lag, but of course I get a Hensley bump if I hit the foot brake hard at speed.

Thanks.

The bump is not Hensley, ProPride or normal, proper set-up is needed.

[wildwoodrver]

Final Chapter in the saga of the brake lag.
I relocated and isolated the ground wire from the Titan pump from a common ground bus in the trailer, directly to the ground wire coming in from the 7-way plug. Problem solved. Lag gone. Well, nearly gone. It is 1/2 second or less on manual override and not noticeable with foot brake. They stop as advertised. Seems the ground must find it's way back to the battery for proper operation.
As for the "bump" I have that under control too. Bob is right; you have to really fine tune the alignment to eliminate the bump in hard braking. If the trailer is pulling, even slightly, to one side, you will feel it take out the slack with hard braking. It just takes some patience and making small adjustments.
Thanks for your input. Now we can focus on enjoying the journey.

[JFScheck]

Gotta give it a micro seconds to pressurize I would imagine?

I was just reading in my owners manual about my Disc Brakes - wanted to ask you if your new system has a "Brake & Hold" feature were it will hold the brakes without running the pump (I think up to 15 seconds) re-pressurize via the pump - then hold for another 15 seconds (or was it 45 seconds, damn)...

Curious to how this feels when stationary - note it only occurs when the foot is on the brake...

[rluhr]

I should have thought of the possibility of a ground wire problem. We've had ground problems a couple of times. With the Actibrake, even a marginally bad ground will cause the unit to simply stop working entirely. More than once I've had to pull over and clean the main ground wire to the trailer frame before proceeding. Interesting that the Titan BrakeRite showed a lag as the symptom instead.

[2airishuman]

Originally Posted by JFScheck

...wanted to ask you if your new system has a "Brake & Hold" feature were it will hold the brakes without running the pump (I think up to 15 seconds) re-pressurize via the pump - then hold for another 15 seconds (or was it 45 seconds, damn)...

there are several old thread on this issue but most are for PRE '08 gear.

my understanding is the HOLD feature largely depends on WHICH actuator/controller circuit board is used.

which one is IN/ON your trailer?

actibrake is outta biz so your unit may be carlisle or dexter or ???

the majority used by a/s were actibrake but this changed in the last 2 years.

it also depends on the brake CONTROLLER in the tv...

for example the itbc in my ford only sends power (voltage) when the truck is MOVING...

so after stopping, for example on a HILL at a STOP LIGHT, or at a RR crossing...

the brake controller STOPS sending a signal and the 2 vehicles are held stationary by the truck brakes...

then as the truck start moving voltage is PROPORTIONAL up to 5 (or 10) mph where it is at FULL power.

at least that is what i think is happenin'

cheers
2air'

[JFScheck]

Searching Threads now - thanks...