Using Pneumatic Trailer Brakes

causym CAUTION: Avoid possible injury from losing control of tractor equipped with AutoPowr transmission operating on downhill slopes. Tractor wheels may lock and skid on slippery downhill slopes. (See DOWNHILL OPERATION IN SLIPPERY CONDITIONS in Operating Tractor-AutoPowr Transmission section.)

Clean connections before attaching air hoses. Lift cover from brake coupler and connect trailer hoses.

Attach trailer lighting plug to tractor 7-pin connector.

Start engine and allow air system to reach working pressure. While air pressure builds, Service Alert indicator light comes on and air pressure warning appears on CommandCenter display. When operating pressure is reached, indicator light and warning display shut off automatically.

Clean connections before attaching air hoses. Lift cover from trailer brake coupler and connect trailer hose coupling. Seal connections with dust caps whenever hoses are disconnected.

Start engine and allow air system to reach working pressure. While air pressure builds, Service Alert indicator light comes on and air pressure warning appears on CommandCenter display. When operating pressure is reached, indicator light and warning display shut off automatically.

IMPORTANT: With trailer lines connected, do not drive tractor until operating pressure is reached and service alert light and warning display shut off.

Depress brake pedals to stop tractor-trailer while disengaging the clutch.

RXA0079513

Brake Couplers


A-Yellow (Service)
B-Red (Park)

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NOTE: Depressing the clutch to stop tractor equipped with AutoPowr transmission is not necessary. See STOPPING AND PARKING THE TRACTOR in Operating Tractor-AutoPowr Transmission.

IMPORTANT: Reduce brake wear:

  • Make sure the pressure hoses are connected.

  • Select the same gear for both downhill and uphill driving.

  • Check the air brake on the trailer regularly for correct functioning.

A field installation kit is available for older equipment requiring a single line braking system. See your John Deere dealer.

NOTE: If tractor is equipped with field installed single line braking system kit, trailer brake may be used at speeds up to 25 km/h (15 mph) only.

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