TM  10-3930-643-34 FRAME  AND  TOWING  ATTACHMENTS  MAINTENANCE. 10-3. Counterweights. (Sheet 3 of 4) REMOVAL 6. Attach hoist and sling to weight (15). 7. Using a 1-1/2"   socket,  socket  wrench handle and a 1-1/2" open end wrench, remove two nuts (11), washers (12), bolts (13), washers (14) and weight (15). 8. Remove hoist and sling from weight (15). 9. Attach hoist and sling to weight (20). 10. Using a 1-1/2"   socket,  socket  wrench handle and a 1-1/2” open end wrench, remove four nuts (16), washers (17), bolts (18), washers (19) and weight (20). INSTALLATION 11. 12. 13. 14. 15. 16. 17. Position weight (20) on frame. Using a 1-1/8"   socket,  socket  wrench handle and a 1-1/8” open end wrench, install four washers (19), bolts (18), washers (17) and nuts (16). Tighten bolts (18) to 280 lb-ft. Remove hoist and sling from weight (20). Attach hoist and sling to weight (15). Position weight (15) on rear of frame. Using a 1-1/2" socket, socket wrench handle and a 1-1/2" open end wrench, install two washers (14), bolts (13), washers (12) and nuts (11). Remove hoist and sling from weight (15). Go to sheet 4 10-21