Brake Chamber Stroke Specifications
Chamber
Max Applied Stroke: inch (mm)
Manufacturer
Type
*
Size
†
Dana Spicer
Long Stroke
16L
2 (51)
20L
24L
24LS
2-1/2 (64)
30LS
*
Long stroke design is indicated by a tag, or embossing, on the brake chamber.
†
Specifications are relative to a brake application with 80 to 90 psi (550 to 620 kPa) air pressure in the brake chambers.
‡
If type 36 chamber is used, slack length should be less than 6 inches.
Table 1, Brake Chamber Stroke Specifications
5.
Start the engine and build air pressure to at least
100 psi (689 kPa). Shut down the engine.
6.
Check all of the foundation brake components for
damage, wear, and loose or missing parts. Re-
pair as needed. See
Group 42
of the vehicle
Workshop Manual for repair procedures.
42–06 Meritor Camshaft
Bracket Lubrication
IMPORTANT: Perform a brake inspection before
lubricating the camshaft bracket.
NOTE: If equipped with an extended-
maintenance Q Plus
™
brake system, the cam-
shaft bracket will not have a grease fitting.
These camshafts use a special NLGI Grade
synthetic polyurea grease and do not require
lubrication for 3 years or 500,000 miles (800
000 km), whichever comes first. The extended-
maintenance camshaft bushings are lubricated
during the brake reline service interval. For ser-
vice and lubrication instructions, see
Group 42
of the vehicle Workshop Manual.
For camshaft brackets with grease fittings, use an
NLGI Grade 1 or Grade 2 multipurpose chassis
grease. Lubricate the camshaft bushings through the
grease fitting on the camshaft bracket or the spider
until new grease flows from the inboard seal. See
WARNING
If grease leaks out under the camhead, the cam-
shaft bracket grease seal is worn or damaged. See
Group 42 in the vehicle workshop manual for
grease seal replacement instructions. If this seal
is not replaced, the brake linings could become
contaminated with grease. The stopping distance
of the vehicle will be increased, which could result
in personal injury or property damage.
f420011a
05/28/93
1
2
3
A
A. Grease Exit
1.
Brake Chamber
2.
Slack Adjuster
3.
Non-Pressure-Relief
Grease Fitting
Fig. 5, Camshaft Bracket Lubrication
Brakes
42
122SD and Coronado 132 Maintenance Manual, February 2016
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