TM  10-3930-638-24&P 2-41.  BRAKE  SYSTEM  TROUBLESHOOTING  (cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE ACTION 10. SCRAPING NOISE FROM SERVICE BRAKES WHEN APPLIED (cont) Step 1. (cont) WARNING Before raising axle off ground, be sure that shipping lock pin is installed. Failure to do so may cause vehicle to slip off jack or jack stands causing serious injury or death. If you are injured by falling  equipment,  obtain  medical  aid  immediately. Raise one axle and wheels off ground. Remove  both  axle  shafts  and  hub  and  drum  assemblies  (para  2-39f). Check  brake  linings  for  wear,  uneven  wear,  brake  fluid/lubricant  contamination  (para  2-43a). Repeat for other axle. a. Replace brake linings if worn or contaminated (para 2-43a). b. if brake linings are okay, proceed to step 2. Step 2. Check brake shoe return springs for damage (para 2-43a). a. Replace spring if damaged (para 2-43a). b. If spring is okay, check brake assemblies for loose or missing brake shoe mounting hardware; tighten/replace  brake  shoe  mounting  hardware  (para  2-43a). 11. STOP LIGHT INOPERATIVE Refer to paragraph 2-24, MALFUNCTION 4 for troubleshooting procedures. 12. DECLUTCH PEDAL DOES NOT NEUTRALIZE TRANSMISSION Disconnect center propeller shaft from brake flange (para 2-39). Block wheels, lightly apply parking brake, and idle engine. Observe transmission output shaft (brake flange) while an assistant depresses service brake pedal. a. If brake flange stops rotating, check adjustment of declutch valve (para 2-43d). If adjustment is correct, replace declutch valve (para 2-43d). b. If brake flange does not stop rotating, replace transmission control valve assembly (notify direct support   maintenance). 2-270