TM-9-2330-335-14-P

SEMITRAILER, TACTICAL, BREAKBULK/CONTAINER TRANSPORTER, 22-1/2 TON, RESET M871R, M871A1R AND M871A2R

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE MANUAL (INCLUDES REPAIR PARTS AND SPECIAL TOOLS LIST)

SEPTEMBER 2008

  TM-9-2330-335-14-P - Page 10 of 640

TM 9-2330-335-14&P
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WARNING
PRO-TORQ SPINDLE NUT
• Failure to follow this instruction could cause the wheel to come off and cause bodily injury. Failure to back off
the nut will cause the bearing to run hot and be damaged.
• Failure to follow this instruction could cause the wheel to come off and cause bodily injury. Do not bend or
manipulate keyway tang in any way. Doing so may cause the tang to break off in service.
• Failure to follow this instruction could cause the wheel to come off and cause bodily injury. The PRO-TORQ
Spindle Nut is sold as an assembly with the keeper in place. DO NOT attempt to place the nut on the spindle or
tighten or loosen the nut on the spindle while the keeper is locked inside the nut. Doing so may deform the
keeper and allow the nut to unthread during operation.
• A new orange keeper arm must be replaced if it is damaged when removed or installed in the nut. It is
recommended to replace the keeper arm each time it is removed. The original nut may be reused; the original
keeper may be reused if not damaged. Failure to comply this warning may cause injury or death to personnel
and damage to the equipment due to wheel-end loss.
WARNING
SEALED BRAKE INSTALLATION AND DISARMING
• A spring brake contains a very powerful compression spring. Failure to comply with all of the following
instructions may result in forceful release of the piggyback or spring chamber and its contents which could
cause death, severe personal injury and/or property damage.
• ALWAYS BLOCK WHEELS to prevent vehicle roll-away when performing any brake maintenance.
• DO NOT attempt to mechanically release (cage) the spring on a spring brake if it shows structural damage.
Caging the spring or disassembly of the chamber may result in the forceful release of the spring chamber and
its contents, which could cause death, severe personal injury, and/or property damage. Remove complete spring
brake and replace with new unit.
• DISARM spring chamber before discarding old brake. To disarm, use a suitable safety chamber (see
Disarming
Introduction
and
Disarming Instructions
in this work package). Failure to disarm assembly prior to disposal
may, in time, result in spontaneous release of the spring chamber and its contents, causing death, personal
injury, and/or property damage.
• Always block wheels to prevent vehicle roll-away when performing any brake maintenance. Failure to comply
could cause injury or death to personnel.
• Step 7 only applies when spring brake is not pressurized. If air pressure is used to compress the spring, do not
tighten release tool more than finger tight. Torquing the release tool nut while the spring brake is pressurized
can cause pressure plate damage resulting in sudden release of the spring which could cause death or severe
personal injury. Air pressure must be released after caging, prior to any disassembly.
• Place blocks under wheels to prevent vehicle roll-away before removing spring brake actuators. Failure to
comply could cause injury or death to personnel.
• Incorrect push rod slack adjuster setup will result in improper brake operation, causing injury to personnel and
damage to equipment.
• After installation, check for proper emergency operation, service operation, and brake adjustment. Failure to
comply could cause injury to personnel and damage to equipment.


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