Manual for inspection, troubleshooting, and re-
pair procedures.
4. Measure the applied chamber stroke. See
Table 2 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. See Group 42 of the Rec-
reational Vehicle Chassis Workshop Manual for
inspection, troubleshooting, and repair proce-
dures.
5. Check all of the foundation brake components for
damage, wear, and loose or missing parts. Re-
pair as needed. See Group 42 of the Recre-
ational Vehicle Chassis Workshop Manual for
inspection, troubleshooting, and repair proce-
dures.
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
Recreational Vehicle Chassis Maintenance Manual, July 2018 42/11
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