What are all those hoses for, when locomotives are MU'ed together?
Thanks to Chris / CopCarSS for my avatar.
The hoses from the center out are the brake pipe, main res, accuating and independent application and release.
Rodney
Rodney Beck The hoses from the center out are the brake pipe, main res, accuating and independent application and release. Rodney
The accuating hose normaly is 0psi unless I make a brake pipe reduction and at the same time iam accuating so the engine brakes do not set up. The independent is the engine brakes.
On some older locomotives there was another hose outboard of the other hoses on each side to control sanding. Unlike the other hoses, which had to be connected only on one side, the sanding hoses had to be connected on both sides of the locomotives. One side was for forward sand and the other side controlled reverse sanding. Not sure, but think it was in the 1950s or 1960s when they started to go to electrically controlled sanding.
DSO17 On some older locomotives there was another hose outboard of the other hoses on each side to control sanding. Unlike the other hoses, which had to be connected only on one side, the sanding hoses had to be connected on both sides of the locomotives. One side was for forward sand and the other side controlled reverse sanding. Not sure, but think it was in the 1950s or 1960s when they started to go to electrically controlled sanding.
There were actually two extra hoses on each side, forward sand and reverse sanding. They were coupled fwd to fwd if the next locomotive was facing same direction or fwd to rev if next in consist trailing. These only had to be coupled on one side. The next step was to go to one sand hose and the direction of the reverser determined the direction of sanding on each unit when air pressure detected in the sand MU hoses.
Just to make it more confusing for Murph, units with schedule 14EL or 6BL/DS/etc air brake did not have an actuating pipe as original equipment.
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