Cylinder Leaks/en: Difference between revisions

Latest revision as of 17:40, 17 March 2025

Over time, the air brake system components leak air. This includes the brake cylinders , so they cannot be relied upon to keep the brake shoes applied indefinitely. This is why on parked vehicles a handbrake must be applied manually.

That said, there are ways to keep running trains safely stationary without handbrakes too, even though this is not recommended. If a train with an applied train brake contains a motorized vehicle with a self-lapping control valve and a functioning compressor , as long as the engine is running the pressure in all of the train’s brake cylinders will be maintained. This means runaways due to leaks won’t be possible. If the train, however, only contains a non-self-lapping vehicle doing the braking, pressure in the cylinders will not be maintained and can lead to a runaway, unless the brake handle is in the service position.

@@ Line 1: / Line 1: @@
 <languages />
-Over time, {{pll|Air Brake System Overview|air brake system components}} leak air. This includes the {{pll|Air Brake System Overview|brake cylinders}}, thus they cannot be relied on to keep the {{pll|Brake Shoes|brake shoes}} applied indefinitely. This is why on parked {{pll|Rail Vehicle Types|vehicles}} a {{pll|Handbrake|handbrake}} must be applied manually.
+Over time, the {{pll|Air Brake System Overview|air brake system components}} leak air. This includes the {{pll|Air Brake System Overview|brake cylinders}}, so they cannot be relied upon to keep the {{pll|Brake Shoes|brake shoes}} applied indefinitely. This is why on parked {{pll|Rail Vehicle Types|vehicles}} a {{pll|Handbrake|handbrake}} must be applied manually.
-That said, if a train with a {{pll|Train Brake|train brake}} applied contains a motorized vehicle with a {{pll|Lapping|self-lapping}} control valve and a functioning {{pll|Compressor|compressor}}, as long as the engine is running the pressure in all of the train’s brake cylinders will be maintained. This means runaways due to leaks won’t be possible. If the train, however, only contains a {{pll|Lapping|non-self-lapping}} vehicle doing the braking, pressure in the cylinders will not be maintained and can lead to a runaway, unless the brake handle is in the {{pll|Lapping|service}} position.
+That said, there are ways to keep running trains safely stationary without handbrakes too, even though this is not recommended. If a train with an applied {{pll|Train Brake|train brake}} contains a motorized vehicle with a {{pll|Lapping|self-lapping}} control valve and a functioning {{pll|Compressor|compressor}}, as long as the engine is running the pressure in all of the train’s brake cylinders will be maintained. This means runaways due to leaks won’t be possible. If the train, however, only contains a {{pll|Lapping|non-self-lapping}} vehicle doing the braking, pressure in the cylinders will not be maintained and can lead to a runaway, unless the brake handle is in the {{pll|Lapping|service}} position.
 [[Category:Air Brake System|4]]