Uncouple tractor/semitrailer (para. 2-24) and pull tractor out and away from gooseneck. Keep APU running after
uncoupled. Leave gooseneck isolation valve pulled out in ADJUST position.
Lower front support legs to the ground (para. 2-22) to support platform.
Operate gooseneck valve and lower gooseneck to lowest position (para. 2-18).
Operate gooseneck valve and raise gooseneck to highest position (para. 2-18).
Repeat steps 3 and 4 until gooseneck works smoothly (approximately 15 cycles).
Lower gooseneck to approximately 63 inches (160 cm) and couple tractor/semitrailer (para. 2-24).
4-20. HYDRAULIC SYSTEM FLUSHING
This task covers:
e. Gooseneck Cylinder
b. Hydraulic Tank Flushing
c. Suspension System
f. Steering Cylinder
d. Steering System Flushing
General mechanics tool kit, item 16, appx. B
Extension light, 24 ft, item 17, appx. B
Adjustable automotive wrench, item 17, appx. B
Waste oil receptacle