If brakes on disabled truck must be manually released,
ensure that the wheels of the disabled truck are chocked
prior to manually releasing the brakes. Failure to chock
wheels could cause serious injury or death to personnel.
If the engine of the disabled truck cannot be started, if
there is an air leak that cannot be repaired, or if brakes on
Axle No. 3, 4 or 5 will not release, then one or all of the
rear axle brake chambers on the disabled truck will have
to be manually released, (Para 2-56c).
Allow air pressure of disabled truck to build to 125 psi (862 kPa) or
manually release rear brakes (Para 2-56c).
Install beacon light on towing truck (Para 3-9).
Turn on beacon light (6).
Hookup disabled truck to towing truck (Para 2-56).
Wheels on disabled truck must be chocked prior to
disconnecting from towing truck. Failure to chock wheels
on disabled truck could cause serious injury or death to
Chock wheels of disabled truck prior to disconnecting towing truck.