I'm doing the Sand Patch mission where you navigate 2 EMD's down the yard to fetch 8 freight cars and bring them back up. I'm having a problem with the lead loco maintaining brake cylinder pressure. I have to operate in Run 6 or better with 2 light locos to overcome the brakes and I can tell it's dragging... Reduce the throttle to 4 and come to an immediate stop. I've tried everything to clear the brakes and nothing seems to work... Hand brake, brake settings in the second unit, nothing
...lead unit checks: MU-2A valve set to Lead or Dead Cut-out valve set to Freight, auto-brake handle fully released Dynamic brake and Independent brake fully released ...trail unit checks: MU-2A valve set to Trail 6 or 26 Cut-out valve set to Cut-out, auto-brake handle set to Handle Off Dynamic brake and Independent brake fully released Questions: Is the trailing unit up and running, powering up and down in sync with the lead unit?
...no problem, glad this resolved your issue! I also see you’re new here... welcome to the Train Sim forums.
I also have this issue in a number of journeys, I usually fixed it by restarting the scenario. Can I ask what/where is the MU-2A valve?
If you're in a Caltrain/UP or older CSX loco (not the AC4400), the MU-2A valve is located on the bottom left side of the engineer’s stand near the floor. This valve is related to configuring two or more directly-connected locos for multi-unit (MU) operation. The lead unit will always have the MU-2A valve set to ‘Lead or Dead‘, while any trailing units in the group are typically set to ‘Trail 6 or 26‘ (referring to the auto brake type in the locos). Hope that helps... it’s confusing for anybody at first- believe me, I’ve been there too. ;-)