Hino 600, Workshop Manual, Page: 337 / 451

SERVICE BRAKE (FULL AIR BRAKE) BR02–59
8. RECOMMENDED SPRING BRAKE ACTUATOR DISARMING PRO-
CEDURE
! WARNING
• This procedure must be strictly adhered to. never attempt to
remove the spring chamber clamp ring from a double diaphragm
actuator or the spring chamber retaining ring from a piston actu-
ator. both actuators employ a high energy power spring that
could cause serious bodily injury if the spring were suddenly
released due to improper disassembly.
All retired spring brake actuators must be safely disarmed before
they are disposed of to prevent serious personal injury from
accidental sudden release of the high energy spring (as much as
2,700 Lbs. of force) in the parking chamber. To disarm the unit,
remove it from the vehicle following the instructions in Section 3
on page BR02-51 for combination chambers, or Section 5 on
page BR02-54 for single/piggyback chambers. Be sure to release
the brake per Section 2 on page BR02-50 of this manual. Never
attempt to remove the head which contains the power spring.
Observe all safety precautions. Place the unit in a steel *con-
tainer and use an acetylene torch to cut a hole through the head
housing the power spring. Cut completely through at least two
spring coils. The steel container must have openings to expose
the head where it is to be cut with the acetylene torch and it must
be strong enough to prevent parts from hurtling out should the
unit suddenly separate before it is safely disarmed. It is the users
responsibility to ensure the steel container is safe.
*Information concerning a suitable container is available through
your MGM Brakes Representative.