Attach safety chains to towing vehicle.
Attach Service air hose gladhand to Service air connector on towing vehicle (if available).
Attach emergency air hose gladhand to emergency air connector on towing vehicle (if available).
Attach applicable (12V or 24V) electrical connector to female electrical connector on towing vehicle (if
Remove safety pin from towbar jack and swivel Jack upwards to the horizontal position, and replace jack
Activate the towing vehicles air brake supply systems so that a functional check of the trailers air/hydraulic
brake systems can be made.
In addition to the brake check, activate the towing vehicles light system, so that a function check can be
accomplished on the trailer electrical/light system.
After checking brake and electrical systems, trailer is ready for use.
AFTER OPERATIONS: After operations the towing vehicles electrical and air systems should be shut off and
disconnected from the trailer unit. Proceed to step a. to secure trailer for short term parking.
Air Reservoir. To bleed the air from the brake system, emergency air reservoir, open air reservoir bleed valve.
Close the valve after air reservoir has emptied of all pressure.
The mechanical drain valve is located on the bottom end of the air reservoir facing the road side. The air
reservoir is mounted on the front side of the second crossmember (8, Figure 7-6 ).