EXTERNAL AIR TRANSPORT BY CH-47 HELICOPTER - CONTINUED
MACHINE DISASSEMBLY AND SECTIONALIZATION - CONTINUED
Do NOT power down scraper bowl. If powered down, cylinder force could overload cutting edge
wheels, causing them to become damaged.
Start engine and raise cutting edge off blocks, remove blocks, then shut down engine. With engine off, lower
scraper bowl until weight rests on cutting edge wheels.
Always wipe ends clean prior to disconnecting hydraulic lines. Ensure ends are clean prior to reconnect-
ing. Failure to do so may introduce contamination into hydraulic system.
To facilitate disconnection of hydraulic hose quick disconnect fitting, relieve any trapped hydraulic
pressure in hoses by operating control levers through all positions (WP 0004 00).
Disconnect bowl lift cylinders from draft frame and lower to ground:
Remove four bolts, washers and clamps securing two crossover hydraulic hoses. Reinstall clamps, washers
Disconnect three hydraulic quick disconnects at center of draft arm crossbeam. Install dust caps.
The following steps three personnel.
While holding left hydraulic lift cylinder in place, remove two bolts, washers, retainer bar and upper cylinder
pin. Continue to hold lift cylinder in place.
While holding right lift cylinder in place, remove two bolts, washers, retainer bar and upper cylinder pin. Con-
tinue to hold lift cylinder in place.