OPERATING CONTROLS AND PROCEDURES 777 OPERATOR’S MANUAL
3-36 Published 10-01-12, Control # 044-05 v2
Stopping Engine/Leaving Crane Unattended
1. Travel crane onto a level surface; do not leave crane
unattended on a grade.
2. Turn on travel park.
3. Swing rotating bed to desired position. Then engage
swing lock and turn on swing brake.
4. Lower all loads to ground and fully apply drum brakes
with brake pedals and latch pedals down (if equipped).
5. Turn on drum park for each drum.
6. Engage drum pawls.
7. If the crane will be unattended for only a short length of
time, turn on boom hoist park.
When the crane is parked overnight or for any other
extended length of time, the boom might lower on its
own due to internal leakage or heat expansion.
Naturally, this is a safety hazard if the boom lowers too
far.
To prevent this problem, the boom must be parked as
shown in Figure 3-21. To secure the boom, follow these
instructions:
a. Raise boom to approximately 75°.
b. Disconnect counterweight lifting pendants from
stored position on mast and pin to handling links.
c. Lower boom until pendants just start to go into
tension and stop (counterweight maximum up limit
should come if you go too far).
Pendants will hold boom between 67° and 73°
depending on boom length.
d. Turn on boom hoist park.
e. Reverse procedure to return to normal operation.
8. Turn off boom cylinder hold.
9. Check that all handles are off.
10. Decrease engine speed to low idle.
Allow engine to idle for three to five minutes so it cools
evenly.
11. Stop engine.
12. Turn off cab power switch.
13. Remove all keys (cab power and crane mode) to prevent
unauthorized operation.
14. Lock operator’s cab windows and door to prevent
unauthorized entry.
WARNING
Moving Load/Tipping Crane Hazard!
Operator shall not leave operator’s cab until crane, loads,
and boom have been secured against movement.
Changing weather conditions including but not limited to:
wind, ice or snow accumulation, precipitation, flooding,
lightning, etc. should be considered when determining the
location and configuration of a crane when it will be left
unattended.
A989
Here for Storage
Lifting
Pendant
Link
Typical
Both Sides
FIGURE 3-21
Handling
Counterweight
Counterweight
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