AP Class 156

chrisreb · Post by **chrisreb** » Mon Feb 24, 2020 6:54 pm

Hi

Coming back to this and having issues. For a cold start have followed all the steps in the manual. However Brakes stay on 32% and it wont throttle up. DRA is Off , brake leaver in release, Regulator in Forward and brake pipe pressure ok. Cannot see any other button to press from manual - anyone got any ideas that I might have missed? many thanks

rosschris10 · Post by **rosschris10** » Mon Feb 24, 2020 7:59 pm

Saw a post on a Facebook group yesterday as well. Someone having the exact same problem as you with the class 158 pack from AP. Wonder if it’s something in the coding that has an effect on a few of the dmus.

749006 · Post by **749006** » Mon Feb 24, 2020 8:26 pm

I don't have the AP version but I have been caught out a few times with start ups

I presume you put the key in with Shift+W instead of just moving they key
Confused by "brake pipe pressure ok" what is it reading?

What is the Main Air Res showing? - you will not get the brakes off until at least 4.5 BAR but 6 BAR is better

Peter

chrisreb · Post by **chrisreb** » Tue Feb 25, 2020 6:57 am

Will re check the brake pressure but this is a real pain. If needed then I might just uninstall the pack

chrisreb · Post by **chrisreb** » Tue Feb 25, 2020 9:42 am

Well did exactly the same today and it worked - so very odd.

749006 · Post by **749006** » Tue Feb 25, 2020 12:23 pm

I was confused by "Brake Pipe Pressure" - something modern DMUs do not have as they use a 3 step westcode braking system

chrisreb · Post by **chrisreb** » Wed Feb 26, 2020 7:10 am

They are referring to the gauge figure - was confusing because so many brake pressure readings!

yyyyamst · Post by **yyyyamst** » Sat Mar 07, 2020 3:42 pm

I was confused by "Brake Pipe Pressure" - something modern DMUs do not have as they use a 3 step westcode braking system

Be carefull with that one. The 3 Step Westcode still takes an Air feed from the Main Res system which is reduced and fed into each Brake Cylinder. All dependant on the Electrical Code sent from the Drivers Brake Handle to the Control Unit. Thus you still have a Brake Cylinder reading.

749006 · Post by **749006** » Sat Mar 07, 2020 4:24 pm

yyyyamst wrote:
749006 wrote:I was confused by "Brake Pipe Pressure" - something modern DMUs do not have as they use a 3 step westcode braking system
Be carefull with that one. The 3 Step Westcode still takes an Air feed from the Main Res system which is reduced and fed into each Brake Cylinder. All dependant on the Electrical Code sent from the Drivers Brake Handle to the Control Unit. Thus you still have a Brake Cylinder reading.

All trains with a 3 step brake show a Brake Cylinder Reading because there is no Brake Pipe.
There is only a Duplex Gauge - one side is Main Res and that is fairly constant - the other is the Brake Cylinder Pressure showing between 0 and 4.5 bar depending on the train.

Slightly related is my profile picture as I was driving a 156 at the time

Peter

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