Replace Trailer Air Brake Dryer Filter (If Equipped)

1. 
   RXA0135319-UN-29AUG13

   Red Trailer Brake Coupler

   
   RXA0135320-UN-29AUG13

   Trailer Brake Dryer Filter

   A - Red Trailer Air Brake Coupler

   B - Trailer Air Brake Dryer Filter

   With engine in OFF position, manually depress release valve inside red trailer air brake coupler (A).

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2. After all air pressure is released, remove trailer air brake dryer filter (B) with O-ring and discard.

3. Lubricate new filter O-ring with clean oil.

4. Install new trailer air brake dryer filter (B) until O-ring contacts air dryer surface. Hand tighten additional 1/2 turn.