TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-20-1 PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDING LUBRICATION INSTRUCTIONS — Continued 0120 00 3) To determine the corrected scale or dial reading, use the following formula and refer to the example. NOTE The length of the torque wrench is measured from the center of the handle to the center of the drive. The length of the adapter is measured from the center of the drive to the center of the wrench. The following example is taken from the PMCS, Item 16. The torque wrench measured 12 inches and the adapter measured 3 inches. The required torque is 130–140 lb-ft (176–190 N·m) and the corrected reading is 104–112 lb-ft (141–152 N·m). EXAMPLE Replace missing track tension adjuster screws. TIGHTEN LOOSE SCREWS TO 130-140 LB-FT (176-190 N·M) TORQUE. Use adapter (WP 0780 00, Item 7) and torque wrench (WP 0780 00, Item 103). Adapter measures 3 inches from drive center to 12–point wrench center. 1/2–inch drive torque wrench measures 12 inches from handle center to drive center. To determine the corrected reading for this task, use the formula as follows: Corrected reading = Required torque value ÷ Length of torque wrench + length of adapter Length of torque wrench Corrected reading = 130 lb-ft ÷ 12 inches + 3 inches 12 inches Corrected reading = 130 lb-ft ÷ 15 inches 12 inches Corrected reading = 130 lb-ft ÷ 1.25 Corrected reading = 104 lb-ft Repeat last step for other torque value. Corrected reading = 140 lb-ft ÷ 1.25 = 112 lb-ft 0120 00-6