Dave: For the diesel-challenged among us, here is what I know about MU connections between diesel units. Perhaps those in the group that have actual engine service, can please correct anything below that is incorrect.
There are two basic connections between diesel units: the MU-hoses and an MU cable. The MU-hoses are the hoses we have been discussing, and these are actual air hoses which connect the air brake systems of the units in a consist. MU-hoses are usually found on both sides of the coupler. Reading out from the coupler, the first hose connects the main reservoirs of the units, the next hose is the Actuating hose, which is involved in releasing the brakes, and the third hose is the Brake Cylinder hose, or the application/release hose. On the B&O, these hoses are color coded (reading out from the coupler) green/red/yellow. You can see these color codes on my GP-35 photo if you look closely. The other main MU connection is the MU cable, which today is a 27-pin electrical cable. The receptacle for the MU cable is found on the deck of a hood unit, just to the right of the coupler when facing the locomotive. The 27 circuits in the MU cable control the other locomotive functions in the consist. My understanding is that early diesels sometimes had two MU cables -- the BTS casting for early hood units has these two receptacles. Newer diesel units have just one MU cable receptacle (as shown on my photo of the GP-35). We don't really need to know all this to model diesel units correctly, but sometimes it is interesting to find out why all those things are hanging off the ends of diesel units. Hope this helps. Dan Vandermause Ellicott City, MD --- In [email protected], "David Heine" <davesn3@...> wrote: > > Iâm not really into diesels, and I donât know how theyâve work, but > Hi-Tech Details has some HO rubber MU hoses. > > > > http://www.hitechdetails.com/Diesel_MU_Hoses.html > > > > Dave Heine > > Easton, PA > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
