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 2, Brake Chamber Stroke Specifications
42–12 Meritor Roller Pin
Lubricating
WARNING
Remove all grease or oil from the camshaft head,
rollers and brake linings. Always replace linings
contaminated with grease or oil, which can in-
crease stopping distances, causing component
damage and serious personal injury.
For Q and P series Meritor brakes, lube the cam an-
chor and cam roller pins when the brake is disas-
sembled, or every six months, with Meritor specifica-
tion grease 0-617-A or 0-617-B. See
Fig. 12 for roller
and anchor pin lubrication points.
Brake Chamber Stroke Specifications
Chamber
Max Applied Stroke: inch (mm)
Manufacturer Type
*
Size
†
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)
Brakes42
Recreational Vehicle Chassis Maintenance Manual, July 201842/12
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