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INSTALL  TUNNEL CONTROL  ARMS (Continued)
INSTALL TUNNEL CONTROL ARMS     (Continued) - TM-55-1520-240-23-9_954

TM-55-1520-240-23-9 CH-47D Heilcopter Manual
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TM 55-1520-240-23-9 11-241 INSTALL TUNNEL CONTROL ARMS     (Continued) 11-241 4. Position four connection links (9) in control arm (1). 5. Install two bolts (10), two washers (11), and two nuts (13).   Torque two nuts  60 to 90 inch-pounds.  Install two cotter pins (14). 6. Check bolts (10).  Bolts shall not rotate with torque less than  10 inch-pounds.  Bolts shall have no axial looseness.  If bolts rotate or are loose, add washer under nut and repeat step 5. 7. Check clearance between bolt (10) and idler (2).  Clearance shall be  0.060 inch  minimum.  If clearance is more than 0.060 inch, go to step 11. If clearance is less than 0.060 inch, go to step 8. WARNING Epoxy primer (E292.1) is flammable and toxic.  It can irritate skin and cause burns. Use only with adequate ventilation, away from heat and open flame.  Avoid contact with skin, eyes, or clothing.  In case of contact, immediately flush skin or eyes with water for at least  15 minutes.  Get medical attention for eyes. 8. Remove cotter pin (14), nut (13), two washers (12 and 11), and bolt (10). Burnish idler (2) under bolt hole.  Use abrasive paper (E11).  Do not burnish more than 0.040 inch deep and 1 inch in diameter.  There shall be no sharp indentations or gouges in burnished area. Touch up burnished area with  two coats  of epoxy primer (E292.1). Wear gloves (E184.1). 9. Install bolt (10), two washers (11 and 12) and nut (13).  Torque nut to  60 to 90 inch-pounds. 10. Install cotter pin (14).  Turn ends of cotter pin into nut castellations to maintain  0.060 inch clearance. 11. Check bolt (10).  Bolt shall not rotate with torque less than  10 inch-pounds.  Bolt shall have no axial looseness.  If bolt rotates or is loose, add washer under nut and repeat steps 9 and 10. 11-937







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