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Page 6-11 2005 Commercial Driver's License Manual
6.5.2 - Combination Vehicle Brake Check
Do these checks in addition to Section 5.3: Inspecting Air Brake Systems.
The following section explains how to check air brakes on combination vehicles. Check the brakes on a double or triple trailer as you would any combination vehicle.
Check That Air Flows to All Trailers. Use the tractor parking brake and/or chock the wheels to hold the vehicle. Wait for air pressure to reach normal, then push in the red "trailer air supply" knob. This will supply air to the emergency (supply) lines. Use the trailer handbrake to provide air to the service line. Go to the rear of the rig. Open the emergency line shut-off valve at the rear of the last trailer. You should hear air escaping, showing the entire system is charged. Close the emergency line valve. Open the service line valve to check that service pressure goes through all the trailers (this test assumes that the trailer handbrake or the service brake pedal is on), and then close the valve. If you do NOT hear air escaping from both lines, check that the shut-off valves on the trailer(s) and dolly(ies) are in the OPEN position. You MUST have air all the way to the back for all the brakes to work.
What else can I help you with?
When you align timing marks and have it TDC the cam valves should be closed on compression stroke?
should be in between intakevalve movement and exhaustvalve movement Yes, valves should be closed.
Should the shut of valves on the rear of the last trailer be open or closed?
Closed
Should the shut-off valves on the rear of the last trailer be open or closed?
Closed
Should the shut off valves on rear of the last trailer be open or closed?
Closed
Should the shut off valves on the rear of the last trailer be open closed?
Closed
Should the shut off valves on the rear of the last trailer be open or closed?
Closed
Should the shut off valves of the rear of the last trailer be open or closed?
Closed
Should the shut off valves on the rear of the last trailer be opened or closed?
Closed
What are Valve shutoff classifications?
Valve shutoff classifications refer to the ability of a valve to completely stop the flow of a fluid. The classifications include "tight shutoff," which means the valve can fully stop the flow, and "loose shutoff," which indicates some minimal leakage may occur even when the valve is closed. Different valve types and designs offer varying levels of shutoff capabilities based on their intended use and operating conditions.
Why 2 shutoff valves under your sink?
One for the hot water, one for the cold.
How do you stop your car from dieseling?
There should be a fuel shutoff that needs to be adjusted, but let the car idle a couple of minutes before shutting it off and the valves should cool off enough to not diesel.
What is one purpose of shutoff valves to a compressor during installation and when servicing an ax?
Shutoff valves are crucial during the installation and servicing of a compressor as they allow for safe isolation of the compressor from the rest of the system. This prevents the release of refrigerant or other fluids, ensuring safety for technicians and minimizing environmental impact. Additionally, shutoff valves facilitate maintenance by enabling work on the compressor without interrupting the operation of the entire system.
