The drivers brake valve used the more reliable poppet valve instead of rotary type face valves, and the electro-pneumatic valves used plug in connectors, speeding up replacement and reducing faults due to bad electrical connections.
22.
When the signal was at'danger', the ramp battery was disconnected and so could not replace the locomotive's battery current : the brake valve solenoid would then be released and a horn sounded in the cab.
23.
Apart from the driver being considered to be the sole operator of the train, the emergency brake pipe tap does not provide the same degree of control over the automatic brake as a proper brake valve.
24.
The Westinghouse system uses air reservoirs on each vehicle and compressed air is released from these reservoirs to the brake cylinders as the pressure in the train pipe is reduced by the driver operating the brake valve.
25.
Every guard's compartment had a brake valve, and the passenger communication apparatus ( usually called " the communication cord " in lay terminology ) also admitted air into the train pipe at the end of coaches so equipped.
26.
In recent years locomotives have been fitted with emergency flashers on the roof of the cab, and these flashers are also activated when the brake pipe pressure is lost for any reason other than the driver's application of the brake valve.
27.
ACP ( alarm chain pulling ) also causes a small lever to be released near the emergency brake valve ( usually mounted near one end of the coach ), which does not retract to its normal position even when the chain is released.
28.
These included the installation of new air tanks and filters, the replacement of old tubing to the windshield wipers, repairs on the valves controlling air flow to the rail sanders, overhaul of the brake valves, and the correction of any suspension system deficiencies.
29.
In the case of a clear signal, current from a battery energising the ramp ( but at opposite polarity ) passed to the locomotive through the contact and maintained the brake valve in the closed position, with the reversed-polarity current ringing a bell in the cab.
30.
The first one was not released until March 2013 as NS 4650 GP59E . The GP59E features a new EM2000 microprocessor, an all-new electrical cabinet with SmartStart auto start / stop, rebuilt 12-710G3C-BC prime-mover with EMDEC EUI system, NS-designed split cooling, the NS Admiral cab with cab signals, LSL, and CCB26 electronic brake valve.
