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 613 of 640
0110-1
TM 9-2330-335-14&P
0110
FIELD AND SUSTAINMENT MAINTENANCE
-
AUTOMATIC SLACK ADJUSTERS
Installation, Adjustment, How to Measure Push Rod Stroke,
Brake Recline/Checking Procedure, Brakes Troubleshooting
INSTALLATION
000110
WARNING
Make sure the wheels are chocked before servicing the semitrailer. Release the parking brake and
check that the push rod is fully released. If the push rod is not fully released, the ASA cannot
be installed properly. Semitrailer movement may cause injury or death to personnel and damage to
the equipment.
NOTE
•
Chock wheels to prevent semitrailer from moving. Check that the push rod on the air brake
chamber is FULLY RETRACTED. Apply air pressure to release spring brake.
•
If air pressure is not available, spring brake must be completely caged back. Install anchor bracket
but do not tighten air brake chamber nut; leave loose.
•
Block wheels to prevent vehicle from rolling. Ensure system tank pressure is above 100 psi
(689 kPa).
•
Both OEM ASA (P/N 409-10683) and the new ASA (P/N 409-20002) can be identified by their
part number stamped on the control arm housing. Also, the new ASA does not have a pointer
(installation indicator) that has to fall within a slot of proper installation.
1.
Check that the push rod is fully retracted; apply air to release spring brake. If air is not available, spring brake
must be manually caged back.
2.
Install anchor bracket loosely.
3.
Some strap brackets have two mounting holes. Proper mounting location is determined by the length of adjuster arm:
5 in. and 5-1/2 in. adjuster arm lengths utilize the shorter hole location, while 6 in. and 6-1/2 in. length adjusters utilize the
longer hole locations.
4.
Do not tighten anchor bracket fasteners at this time.
5.
Apply antiseize type lubricant to camshaft splines.
Figure 1.
Installation.
0110
447-0165
4
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