Western Star 47X 2020, Maintenance Manual

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Brake Chamber Stroke Specifications
Chamber
Max Applied Stroke: inch (mm)
Manufacturer Type
*
Size
†
Meritor
Standard Stroke
9
Less than 1-1/2 (38)
12
16
Less than 1-3/4 (44)
20
24 Less than 1-7/8 (48)
Long Stroke 24
Less than 2 (51)
Standard Stroke 30
*
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 3, Brake Chamber Stroke Specifications
42–06 Haldex Slack Adjuster
Lubrication
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.
CAUTION
Do not use moly-disulfide-loaded grease or oil.
Both the life and reliability of the slack adjuster
will be reduced if this type of grease is used.
Lubricate the automatic slack adjuster at the grease
fitting. See
Fig. 5 . Use standard chassis lubricant for
Haldex slack adjusters.
42–07 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
f422363c 06/26/2007
Fig. 5, Haldex Automatic Slack Adjuster Grease Fitting
Brakes
42
47X and 49X Maintenance Manual, August 2020
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