Lull 644E-42 Operation Manual - Manual (Page 104)

102 Model 644E Origin 3/04
Emergency Operations
USE IN CASE OF:
BOOM LIFT LINE FAILURE - Lift Cylinder to Block (1)
BOOM LIFT LINE FAILURE - Block to Frame Bulkhead (2)
BOOM EXTEND LINE FAILURE - Extend Cylinder to Block (3)
BOOM EXTEND LINE FAILURE - Block to Frame Bulkhead (4)
1. Clear the area of any unnecessary personnel.
2. Block all four wheels.
3. Place a container under the failed hose to catch any hydraulic oil that may
escape during this procedure.
4. Return to the cab, fasten your seat belt and start the engine.
5. Slowly retract the boom.
6. Slowly lower the boom and ground the carriage.
7. Shut off the engine.
8. Completely remove the load from the carriage.
9. Place an accident prevention tag on both the ignition switch and steering
wheel. If you do not have a safety tag, place tape over the ignition switch.
10. Have the vehicle serviced immediately. Replace any failed hydraulic lines
with new parts.
11. Return to the cab, fasten your seat belt and start the engine.
12. Cycle the lift/lower and extend/retract cylinders several times to bleed air
from the system. Check for leaks.
13. Recheck the hydraulic oil level. Add oil if necessary.
14. Transfer any waste oil to a container with a cover and label as used oil. Dis-
pose of properly.
STEP 2
WARNING:
Wear protective clothing and proper eye protection
when working with or around hydraulic oil. Wait for hydraulic oil to cool
before attempting to repair the failure. Hot hydraulic oil can cause severe
burns and other serious injury.