EXTERNAL AIR TRANSPORT BY CH-47 HELICOPTER - CONTINUED
MACHINE ASSEMBLY - CONTINUED
Using low idle ONLY and first gear or reverse, position tractor directly in front of and in line with scraper bowl.
Steer using skid steer control: push control right to turn right, pull control left to turn left.
Remove two bolts, washers, retainer bar, and draft arm pin from each side of scraper bowl.
With ground guide assistance, slowly back tractor up into position in front of scraper:
Maintain draft arms of tractor an equal distance from attachment point on each side of scraper bowl. Keep
tractor centered on scraper.
Center of gravity of tractor is over tractor wheels. Draft arms can be manually lifted, as required, to
facilitate positioning at scraper bowl.
Have an assistant maneuver each draft arm into its respective slot on scraper bowl, as tractor backs up.
Clean and lubricate pins with antiseize compound (Item 5, WP 0026 00) before they are installed.
When alignment for pin installation is OK, have each assistant install pin through scraper bowl and draft arm.
Install retainer bar, two washers, bolts and bolt. Tighten bolts securely.