should turn clockwise. If it does not, re-
place the slack adjuster.
NOTE: The adjusting hexnut will turn in
small steps. You will not be able to see it
turn very well without a wrench on it.
5.3 Check the counterclockwise torque of the
adjusting hexnut. The torque should be
greater than 15 lbf·ft (20 N·m). If it is not,
replace the slack adjuster.
42–26 Automatic Slack
Adjuster Lubricating,
Haldex
Lubricate a Haldex automatic slack adjuster at the
grease fitting with any extreme-pressure NLGI Grade
1 or Grade 2 grease if the operating temperature is
–20°F (–29°C) and above. If the operating tempera-
ture is below –20°F (–29°C), use a low-temperature
extreme-pressure grease.
Brakes42
Business Class Trucks Maintenance Manual, October 199842/14
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