TM 9-2330-235-14&P
4-22. BRAKE SYSTEM TESTS.
This Task Covers:
a. Air System Lines and Hose Leakage Test
b. Airbrake Chamber Pushrod Travel Test
Initial Setup:
Equipment Conditions:
Materials/Parts:
Trailer coupled to towing vehicle (para 2-8).
Detergent (Item 5, Appendix E)
Rags (Item 12, Appendix E)
Tools/Test Equipment:
General mechanic's tool kit
a.
AIR SYSTEM LINES AND HOSE LEAKAGE TEST
1. With compressed air system fully charged, coat exterior of components and connections with soapy water.
Formation of bubbles indicates air leaks.
2. Tighten connections and repeat step 1. If leaks cannot be eliminated, replace defective components (Para 4-33 or
434 .
b.
AIRBRAKE CHAMBER PUSHROD TRAVEL
TEST
1. With brakes released, insert a small testing rod
in one of two inspection holes (1) in airbrake
chamber mounting bracket (2). Mark testing rod
at surface of bracket when rod is inserted as far
as it will go.
2. Apply brakes and mark testing rod at surface of
bracket.
3. Measure distance between two marks. Marks
should be between X in. and %7 in. (13 mm
and 22 mm) apart. If marks are less than X in.
(13 mm) or greater than X in. (22 mm) apart,
adjust brakes (para 4-23 or 4-24).
TA505006
4-45
