TM-9-2520-238-34 Direct Support for M113 Family Major Assemblies Download
Page 139 of 336
TM 9-2520-238-34 REPAIR TRANSFER GEARCASES A, B, AND C — Continued 0017 00 RUN-IN TEST 1. Mount gearcase on test stand in the same position as when installed in the carrier. 2. Fill gearcase with 5 pints of oil so level is between ADD and FULL marks on liquid level gauge rod. Provide suitable external lubricating oil supply for differential oil pump and the hydraulic pump (if installed). NOTE Provide artificial heating and cooling, if needed. Do not allow oil temperature to exceed 280 F (138 C) at any time during run-in tests. At each stage, watch for over-heating, undue noise, and vibration. Check all seals and covers for oil leakage. 3. Run gearcase in the following minimum time duration stages: Table 1. TIME DURATION STAGES Stage (rpm) Load (pound-foot) Stage Time (minutes) 1100 to 1300 No load 5 1900 to 2100 No load 5 2800 to 3000 No load 5 4. Remove drain plug and drain oil for at least 15 minutes into a suitable container. Install drain plug. Leave oil residue in gearcase for rust prevention. 0017 00-25 5. Remove sling and lifting device from transfer gearcase.