Title 49

PART 399 APPENDIX G



Appendix G to Subchapter B of Chapter III - Minimum Periodic Inspection Standards

49:5.1.1.2.42.2.17.7.22 : Appendix G

Appendix G to Subchapter B of Chapter III - Minimum Periodic Inspection Standards

A vehicle does not pass an inspection if it has one of the following defects or deficiencies:

1. Brake System.

a. Service brakes. (1) Absence of braking action on any axle required to have brakes upon application of the service brakes (such as missing brakes or brake shoe(s) failing to move upon application of a wedge, S-cam, cam, or disc brake).

(2) Missing or broken mechanical components including: shoes, lining, pads, springs, anchor pins, spiders, cam rollers, push-rods, and air chamber mounting bolts.

(3) Loose brake components including air chambers, spiders, and cam shaft support brackets.

(4) Audible air leak at brake chamber (Example-ruptured diaphragm, loose chamber clamp, etc.).

(5) Readjustment limits. (a) The maximum pushrod stroke must not be greater than the values given in the tables below and at § 393.47(e). Any brake stroke exceeding the readjustment limit will be rejected. Stroke must be measured with engine off and reservoir pressure of 80 to 90 psi with brakes fully applied.

Clamp-Type Brake Chambers

Type Outside diameter Brake readjustment limit: standard stroke chamber Brake readjustment limit: long stroke chamber
6 4 1/2 in. (114 mm) 1 1/4 in. (31.8 mm)
9 5 1/4 in. (133 mm) 1 3/8 in. (34.9 mm)
12 5 11/16 in. (145 mm) 1 3/8 in. (34.9 mm) 1 3/4 in. (44.5 mm).
16 6 3/8 in. (162 mm) 1 3/4 in. (44.5 mm) 2 in. (50.8 mm).
20 6 25/32 in. (172 mm) 1 3/4 in. (44.5 mm) 2 in. (50.8 mm).
2 1/2 in. (63.5 mm). 1
24 7 7/32 in. (184 mm) 1 3/4 in. (44.5 mm) 2 in. (50.8 mm).
2 1/2 in. (63.5 mm). 2
30 8 3/32 in. (206 mm) 2 in. (50.8 mm) 2 1/2 in. (63.5 mm).
36 9 in. (229 mm) 2 1/4 in. (57.2 mm)