TM 9-2330-390-14&P4-58.MAJOR BRAKE ADJUSTMENT (Con’t).2.3.4.5.6.7.8.Remove plugs from access slots (3). Check ad-justing bolts to ensure they are completely bot-tomed. If not, manually back off starwheel (6) byturning counter clockwise to bottomed position.Using 15-20 psi (103-138 kPa) air, pulsate airpressure to actuate and release brakes five or sixtimes and observe through access slots that star-wheel and adjusting bolt for each brakeshoe arerotating.Insert feeler gage into access slot (5) in top andbottom dust shields (4). Check brakeshoe Iining-to-brakedrum clearance at top of each brake-shoe. Total clearance for both brakeshoes shouldnot exceed 0.090 in. (2.3 mm). Individual brake-shoe clearance should not exceed 0.050 in. (1.3mm) across width of shoe.(a)If clearances are within specification,install plugs in access slots (3). Removetemporary air hose (1) from airbrake cham-ber (2). Proceed to step 5.(b)If clearances are not within specification,proceed to step 5.Rotate brakedrum by hand one full turn. Thereshould be minimal drag. If drag is apparent, pro-ceed to step 6.If brakeshoes have not properly adjusted, removehub and brakedrum (see paragraph 4-75).Remove two guide pawl hollow capscrews (8)copper washers (9), springs (10), and adjustingpawls (11) from plunger housing (7).Inspect teeth of adjusting pawls (11) for roundedor flattened condition. If teeth are damaged,replace spider assembly (see paragraph 4-60).4-127
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