35 SAFE COUPLING PROCEDURE
8.
Disconnect the brake lines and power cords.
9.
If equipped, pull and secure the secondary lock handle.
10. Pull the primary r
11. Release the tow vehicle brakes and slowly drive away from the trailer.
Do not assume that the landing gear or landing gear frame on your trailer can support a loaded trailer.
2.1.1TRAILERS EQUIPPED WITH AIR RIDE. If your semi trailer is equipped with air ride, you should evacuate the air from the air bags on the suspension before lowering the landing gear. This will ensure that the landing gear does not get damaged due to releasing the air in the suspension after the trailer is uncoupled from the tow vehicle. To release the air from the suspension air bags, locate the suspension dump valve. This valve can be located in various positions such as landing gear frame, the front of the rear subframe or at the rear of the trailer. Pull the dump valve to release the air from the suspension.
gear or damage to the equipment may result. Towed vehicle brakes must be set for this valve to operate. If the vehicle is equipped with an air spring suspension.
TYPICAL AIR RIDE EXHAUST VALVE
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