42–07 Meritor Slack Adjuster
Lubrication
IMPORTANT: Perform a brake inspection follow-
ing the instructions in this group before lubricat-
ing the slack adjusters.
WARNING
Failure to lubricate slack adjusters could lead to
dragging brakes or a brake failure, resulting in
property damage, personal injury, or death.
NOTE: If equipped with an extended-
maintenance Q Plus
™
brake system, the slack
adjuster will not have a grease fitting. These
slack adjusters use a special NLGI Grade syn-
thetic polyurea grease and do not require lubri-
cation for 3 years or 500,000 miles (800 000
km), whichever comes first. The extended-
maintenance slack adjusters are lubricated dur-
ing the brake reline service interval. For service
and lubrication instructions, see
Group 42
of
the vehicle Workshop Manual.
For slack adjusters with grease fittings and for oper-
ating temperatures above –40°F (–40°C), use an
NLGI Grade 1 clay-base grease, or an NLGI Grade 1
or 2 lithium-base grease.
For slack adjusters with grease fittings and for oper-
ating temperatures below –40°F (–40°C) and above
–65°F (–54°C), use an NLGI Grade 2 synthetic oil,
clay-base grease.
Lubricate the slack adjuster at the grease fitting until
grease is forced past the pressure-relief capscrew or
past the gear splines around the inboard snap ring.
See
42–08 Dana Spicer Camshaft
Bracket Lubrication
IMPORTANT: Perform a brake inspection before
lubricating the camshaft bracket.
Pump grease into the camshaft bracket until it ap-
pears at the slack adjuster end of the bracket. See
Use an NLGI Grade 1 or Grade 2 multipurpose chas-
sis grease. If grease leaks out under the camhead,
the camshaft bracket grease seal is worn or dam-
aged; replace it. See
Group 42
of the
122SD and
Coronado Workshop Manual
for grease seal replace-
ment instructions.
42–09 Dana Spicer, Haldex,
and Gunite Slack
Adjuster Lubrication
IMPORTANT: Perform a brake inspection before
lubricating the camshaft bracket.
Automatic slack adjusters that have a grease fitting
must be lubricated periodically to ensure proper
brake operation.
WARNING
Failure to lubricate slack adjusters could lead to
dragging brakes or a brake failure, resulting in
property damage, personal injury, or death.
f420012a
10/20/93
1
2
3
4
5
6
7
1.
Brake Chamber
2.
Clevis
3.
Actuator Rod
4.
Boot
5.
Pressure-Relief Capscrew, Gasket, Pawl Spring,
and Pawl
6.
Manual Adjusting Nut
7.
Grease Fitting (or plug)
Fig. 6, Meritor Automatic Slack Adjuster
Brakes
42
122SD and Coronado 132 Maintenance Manual, February 2016
42/9
