TM 9-2330-373-14 & P
Connect the towing vehicle SERVICE and
proper semitrailer couplings and open shutoff
valves on tow- ing vehicle air supply lines.
Clean bleeder valve (1) in hydraulic wheel
cylinder and attach tube (2) to bleeder valve.
Submerge opposite tube end in bottle or jar
partially filled with hydraulic brake fluid.
Do not reuse brake fluid when refilling
master cylinder. Use clean fluid as
required on lubrication instructions.
Fill the hydraulic master
cylinder with brake fluid
until fluid level is 1/2-inch
1. Bleeder valve
to 3/8-inch below top of
4. Rotate bleeder valve three- quarters of a turn
5. Depress towing vehicle brake pedal to expel air.
6. Close bleeder valve before releasing brake