TM-9-2350-277-20-2 Unit Maintenance Manual Volume 2 M113A3 M577A3 M1064A3 M1068A3 M58 Download
Page 179 of 790
TM 9-2350-277-20-2 PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING LUBRICATION INSTRUCTIONS — Continued 0155 00 ITEM NO. INTERVAL MAN- HOUR ITEM TO BE CHECKED OR SERVICED C R E W M E M B E R PROCEDURE EQUIPMENT NOT READY/ AVAILABLE IF: c. Remove the four bolts, washers and gasket from the access cover under the vehicle directly under the powerpack. d. Push the hydraulic hoses to the side and look into the access opening. You will see the rear bottom side of the engine’s flywheel cover as well as a 2’’ by 3’’ opening on the flywheel cover in the six o’clock location. e. On a sharp angle through this opening, you will see the back side of the flywheel, as well as the clearance holes on the flywheel but through the opening you can only see one hole at a time. f. Looking at the clearance holes, you can also see the studs and locking nuts that hold the spline drive ring in place. The spline drive ring studs and nuts are designed to protrude into the flywheel’s clearance holes and clear the flywheel’s holes by approximately 1/4’’. g. As in the audio method, use the 3/8’’ bolts and the breaker bar to detect any backlash. Turn the engine manually to position one of the flywheel’s clearance holes in the center of the flywheel’s cover opening for visual accessibility. h. As the person in the crew compartment moves the engine, the person under the vehicle looking into the access hole will be able to detect one of the following two relative movements on the spline drive coupling. 1) When the spline drive coupling is in good condition, you can only detect unit movements because the clearance between the mating spline teeth is just a few thousandths of an inch. 0155 00-159 Change 3