Using Trailer Air Brakes (If Equipped)

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

IMPORTANT: Agricultural Tractor Trailer Air Brakes are designed only for use with agricultural implements and agricultural trailers. This system is not compatible with Trailer Air Brake Systems used by over-the-road vehicles and does not conform with the standards of over the road trailer air and electrical systems.

Air brakes are a dual-line system.

CAUTION: Make sure park brake valve (C) is set (knob UP), before connecting air lines.

Clean connections before attaching air hoses. Lift cover from brake coupler and connect trailer hoses. Attach service hose to blue coupler (A) and park hose to red coupler (B).

NOTE: Trailer lighting plug may need to be rewired to work with tractor 7-pin connector. All trailer warning lights must be operational.

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.

A-Blue (Service)
B-Red (Park)
C-Park Brake Valve

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

Park brake valve (C) is used to release and set trailer air brakes. Push down on knob to release brakes; pull up to set brakes.

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

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.

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

CAUTION: Shifting transmission to PARK does not set trailer air brakes. Pull up on park brake valve knob (C) to set trailer air brakes before disconnecting lines from tractor.

Bring tractor-trailer to a complete stop, shift transmission to PARK and pull up brake valve knob to set trailer air brakes before dismounting tractor or disconnecting lines from couplers. Seal connections with dust caps whenever hoses are disconnected.

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