TM-9-2520-238-34 Direct Support for M113 Family Major Assemblies Download

TM 9-2520-238-34 INTRODUCTION TO HOW TO USE TROUBLESHOOTING—Continued 0004 00 Check title to make sure you are troubleshooting the correct system for the problem. Next, read the INITIAL SETUP carefully. Make sure you have all the items listed in the INITIAL SETUP. Some access steps in Equipment Conditions may not need to be performed depending on the fault location. It’s up to you to decide which are necessary for your particular problem. TM 9-2520-238-34 DIFFERENTIAL MAKES EXCESSIVE NOISE OR VIBRATES WHILE MOVING 0010 00 INITIAL SETUP: Maintenance Level Direct/General Support Tools and Special Tools General mechanic’s tool kit (WP 0034 00, Item 37) Personnel Required Track Vehicle Repairer References See your-20 Equipment Condition Differential removed from carrier (See your -20) Disassemble for inspection per repair differential right angle gearbox (WP 0029 00) Repair output shaft assemblies (WP 0025 00) Now you’re ready to begin troubleshooting. Look at the first block. Read step1. If the answer to the question, “Has bevel gear backlash been adjusted?” is YES, follow the Yes arrow to the next box. Read step 1. If the answer to the question, “Has shaft gear bearing been adjusted?” is YES , follow the YES arrow to the next box. Follow the same procedure or each box. If you reach the last box on this page and the answer to the question “Are output shaft bearings serviceable?” is YES, follow YES arrow to the next box. TM 9-2520-238-34 DIFFERENTIAL MAKES EXCESSIVE NOISE OR VIBRATES WHILE MOVING 0010 00 INITIAL SETUP: Maintenance Level Direct/General Support Tools and Special Tools General mechanic’s tool kit (WP 0034 00, Item 37) Personnel Required Track Vehicle Repairer References See your-20 Equipment Condition Differential removed from carrier (See your -20) Disassemble for inspection per repair differential right angle gearbox (WP 0029 00) Repair output shaft assemblies (WP 0025 00) T TN NO NO NO NO YN 2YN 3YN 4YN NO Y 2Y 3Y 4Y YES YES YES YES YES 1. Inspect bevel gear backlash to see if it has been adjusted. 2. Has bevel gear backlash been adjusted? 1. Inspect shaft gear bearing to see if it has been adjusted. 2. Has shaft gear bearing been adjusted? 1. Inspect shaft gear bearings for damage. 2. Are shaft gear bearings undamaged? 1. Inspect bevel gear shaft bearings (WP 0029 00). 2. Are bevel gear teeth undamaged? 1. Inspect output shaft bearings. 2. Are output shaft bearings serviceable? 1. Adjust bevel gear backlash (WP 0029 00). 2. Verify no faults found. 1. Adjust shaft gear bearing (WP 0029 00). 2. Verify no faults found. 1. Replace damaged bevel gear shaft bearing (WP 0029 00). 2. Verify no faults found. 1. Replace damaged shaft gear bearings (WP 0029 00). 2. Verify no faults found. 1. Replace output shaft bearings (WP 0025 00). 2. Verify no faults found. 0010 00-1 0004 00-4