TM 9-2320-361-34 16-3. REAR WINCH (M756A2) REPAIR (Contd) d. Cleaning and Inspection 1. 2. 3. 4. 5. 6. 7. 8. 9. For general cleaning instructions, refer to para. 2-8. For general inspection instructions, refer to para. 2-9. Inspect drum thrust ring (1) and end frame thrust ring (2) for wear. Refer to table 16-2, M756A2 Rear Winch Wear Limits, for measurements. Replace if worn past limit. Inspect five drum shaft bushings (3) for wear. Refer to table 16-2, M756A2 Rear Winch Wear Limits, for measurements. Replace if worn past limit. Inspect drum sliding clutch (4) for wear. Refer to table 16-2, M756A2 Rear Winch Wear Limits, for measurements. Replace if worn past limit. Inspect poppet spring (5), drag brake spring (6), and automatic brake spring (7) for wear. Refer to table 16-2, M756A2 Rear Winch Wear Limits, for measurements. Replace if worn past limit. Inspect end frame sleeve (8) for wear. Refer to table 16-2, M756A2 Rear Winch Wear Limits, for measurements. Replace if worn past limit. Inspect brakeband (9) and drag brake (10) for wear. Refer to table 16-2, M756A2 Rear Winch Wear Limits, for measurements. Replace if worn past limit. Inspect and clean bearing (11) (TM 9-214). Replace bearing if worn or damaged. Table 16-2. M756A2 Rear Winch Wear Limits. ITEM WEAR LIMITS/TOLERANCES NO. lTEM/POINT OF MEASUREMENT STANDARD METRIC 1 Drum thrust ring Inner diameter 2.13-2.14 in. 5.41-5.44 cm Thickness 0.48-0.49 in. 12.12-12.45 mm 2 End frame thrust ring Inner diameter 2.13-2.14 in. 5.41-5.43 cm Thickness 0.49-0.51 in. 12.45-12.95 mm 3 Drum shaft bushings: Steel, inner diameter 2.11-2.13 in. 5.36-5.41 cm Copper, inner diameter 2.13-2.131 in. 5.41-5.413 cm 4 Drum sliding clutch: Inner diameter 2.133-2.135 in. 5.418-5.423 cm Key engagement slots 0.504-0.508 in. 12.802-12.903 mm 5 Poppet spring (free length) 1.91 in. 4.85 cm 6 Drag brake spring: Free length 2 in. 5.08 cm Compressed to 1.0625 in. (2.699 cm) 52 lb-ft 70.51 N.m 7 Automatic brake spring: Free length 1.5 in. 3.81 cm Compressed to 1 in. (2.54 cm) 48 lb-ft 65.09 N.m 8 End frame sleeve (inner diameter) 2.375-2.376 in. 6.033-6.035 cm 9 Brakeband (thickness) 0.1725-0.1875 in. 4.382-4.762 mm 10 Drag brake (thickness) 0.235-0.25 in. 5.969-6.35 mm 16-18