Western Star 47X 2020, Руководство по обслуживанию

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ing system may lead to brake failure, resulting in
property damage, personal injury, or death.
2. With the engine off, and 100 psi (690 kPa) of air
tank pressure, have an assistant apply and hold
an 80 to 90 psi (552 to 621 kPa) brake applica-
tion.
3. Check to see if the colored over-stroke band on
each brake chamber pushrod is exposed.
If a band shows, the stroke is too long. Check
the foundation brake components for wear or
damage, and repair as needed. See
Group 42 of
the Western Star 47X and 49X Workshop
Manual for inspection, troubleshooting, and re-
pair procedures.
4. Measure the applied chamber stroke. See
Table 3 for the proper stroke for the type of
chamber being used. If the stroke is too short,
the brakes may drag or will not fully apply. Check
for improper operation or adjustment of the auto-
matic slack adjuster.
5. Check all of the foundation brake components for
damage, wear, and loose or missing parts. Re-
pair as needed.
Brake Chamber Stroke Specifications
Chamber
Max Applied Stroke: inch (mm)
Manufacturer Type * Size
†
Gunite
Standard Stroke
9
1-3/8 (35)
12
16
1-3/4 (45) 20
24
30 2 (51)
36
‡
2-1/4 (57)
Long Stroke
16
2 (51) 20
24
24
2-1/2 (64)
30
Haldex
Standard Stroke
12 1-3/8 (35)
16
1-3/4 (44) 20
24
2-1/2-Inch Extended Stroke 24 2 (51)
3-Inch Extended Stroke 24 2-1/2 (64)
Standard Stroke 30 2 (51)
Long Stroke 30 2-1/2 (64)
Brakes
42
47X and 49X Maintenance Manual, August 2020
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