TM 9-2330 -326 -14&P
H-37. AUTOMATIC SLACK ADJUSTERS (Cont.)
The ASA is NOT a cure -all for foundation brake deficiencies.
If the proper push rod stroke cannot be maintained be sure to
thoroughly check the other brake components.
This check could also avoid unnecessary ASA replacement.
Check the foundation brake for:
Worn cam shaft and bushings
Broken shoe return springs
Air chambers not releasing
Worn or broken brake components
Loose wheel bearings
Check the ASA for:
Proper push rod stroke
Proper ASA installation
Loose, broken, or bent adjuster brackets
Worn clutch assembly
Adjuster not fully rel easing
It is recommended that the following items be replaced on semitrailers when new axles are installed
to ensure safe operation. The following is for the dual axle semitrailer and are listed in the TM
QUANTITY PER AXLE /TRUNNION
Spring End Cap Bolts
Spring End Cap Washers
Spring End Cap Locking Nuts
Spring End Cap Locking Nut Washers
Trunnion U-Bolt Washers
Trunnio n Hub Hex Nuts
Follow the TM instructions for installation (See H-38, Page H-173)
Check end caps for damage, replace if damaged.
Spring seats must be tack welded in place when axles are adjusted parallel to each other and
perpendicular to trunnion tube.
Weld the spring seats to the axle using 3/8" welds. Assemble axle U-bolts to spring end caps.
Axles must be aligned using the kingpin as the center point.
Adjustment plates must be welded after axle has been aligned.
Wet (oiled) torque limits are for new fasteners installed.
Dry torque limits are for in-service parts.