Cylinder Leaks/en - Revision history

FuzzyBot: Updating to match new version of source page

2025-03-17T17:40:05Z

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← Older revision		Revision as of 17:40, 17 March 2025
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	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 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.		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]]		[[Category:Air Brake System\|4]]

FuzzyBot: Updating to match new version of source page

2025-03-11T15:25:24Z

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← Older revision		Revision as of 15:25, 11 March 2025
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	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, {{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 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, 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.

	[[Category:Air Brake System\|4]]		[[Category:Air Brake System\|4]]

FuzzyBot: Updating to match new version of source page

2025-03-09T20:54:04Z

Updating to match new version of source page

← Older revision		Revision as of 20:54, 9 March 2025
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	Brake ~~cylinders aren’t perfect and~~ leak air ~~over time~~. ~~Thus~~, they cannot be relied on to keep the brake shoes applied ~~for too long~~. This is why on parked vehicles a handbrake must be applied.		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.

	That said, if a train with applied ~~train brakes~~ contains a motorized vehicle with a self-lapping 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.		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.

	~~{{See also\|Air Brake System Overview\|Lapping\|Manual Cylinder Release\|Monitoring\|Train Brake\|Independent Brake\|Brake Shoes\|Handbrake}}~~
	[[Category:Air Brake System\|4]]		[[Category:Air Brake System\|4]]

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2025-02-28T16:04:28Z

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← Older revision		Revision as of 16:04, 28 February 2025
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	~~{{OldManualArticleNotice}}~~
	Brake cylinders aren’t perfect and leak air over time. Thus, they cannot be relied on to keep the brake shoes applied for too long. This is why on parked vehicles a handbrake must be applied.		Brake cylinders aren’t perfect and leak air over time. Thus, they cannot be relied on to keep the brake shoes applied for too long. This is why on parked vehicles a handbrake must be applied.

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	{{See also\|Air Brake System Overview\|Lapping\|Manual Cylinder Release\|Monitoring\|Train Brake\|Independent Brake\|Brake Shoes\|Handbrake}}		{{See also\|Air Brake System Overview\|Lapping\|Manual Cylinder Release\|Monitoring\|Train Brake\|Independent Brake\|Brake Shoes\|Handbrake}}
	[[Category:Air Brake System]]		[[Category:Air Brake System\|4]]

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2025-02-28T15:35:25Z

Updating to match new version of source page

New page

<languages />
{{OldManualArticleNotice}}
Brake cylinders aren’t perfect and leak air over time. Thus, they cannot be relied on to keep the brake shoes applied for too long. This is why on parked vehicles a handbrake must be applied.

That said, if a train with applied train brakes contains a motorized vehicle with a self-lapping 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.

{{See also|Air Brake System Overview|Lapping|Manual Cylinder Release|Monitoring|Train Brake|Independent Brake|Brake Shoes|Handbrake}}
[[Category:Air Brake System]]