Always block wheels with chock blocks before manually
releasing actuator (caging spring brakes).
Caged spring in bottom chamber is under 2500 lbs of
tension. Use extreme care when performing maintenance.
Do not position yourself in front of, or in line with
the spring brake assembly. Perform necessary
maintenance from the side. Read all manufacturer's
warning labels before caging. Inspect clamp bands,
castings and fasteners for external damage. If damage
to these items is evident, do not attempt caging
procedure. Notify organizational maintenance
immediately. Failure to observe this warning could
result in serious personal injury.
Block semitrailer with chock blocks to prevent movement.
Remove plug (3, fig. 2-30) from spring brake chamber.
Remove spring brake tool (1) from mounting hole
c. Remove nut (5) and washer (6).
(2)in spring brake chamber.
d. Insert spring brake tool (1) through opening (4) in brake chamber.
release tool (1) 1/4 turn clockwise to lock in manual release position.
e. Install washer (6) and nut (5) on spring brake tool (1).
Tighten until 2 1/2
to 2 3/4 inches of spring brake tool (1) is exposed.
Repeat steps b. through e. for remaining spring brake chambers.
Remove and stow chock blocks.
Re-chock wheels to prevent semitrailer movement.
Notify Organizational Maintenance.
Caging Spring Brake Chamber