SLACK ADJUSTERS MAINTENANCE--Continued
Raise rear axle until wheels clear ground. Rotate manual adjustment hex (9) clockwise until brake
linings are snug against brakedrum.
More torque is required to rotate manual adjustment hex
counterclockwise than is necessary to rotate it clockwise.
Torque may be as high as 70 lb-ft (94.9 Nm).
Turn manual adjustment hex (9) counterclockwise 1/4 turn. Pull push rod (5) to confirm that push
rod (5) has approximately 0.50 in. (12.7 mm) of free travel.
Apply 90 to 95 psi (621 to 655 kPa) air pressure from towing vehicle air gage. Make and hold a full
brake application. Measure push-rod stroke. Two in. (5.1 cm) is maximum stroke. If stroke exceeds
2-in. (5.1-cm) limit, inspect all brake system components for serviceability.