Grove Published 04-04-2017, Control # 446-09 3-41
RT770E OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
Control Lever Lockout System
The control lever lockout system consists of hydraulic
solenoid valves (located in the directional control valves)
which are in series between the hydraulic remote control
valves in the cab and the pilot-operated directional control
valves. When the valves are actuated, they prevent pilot flow
between the hydraulic remote control valve in the cab and
the appropriate directional control valve. The valves are
activated in such a manner as to prevent worsening the
condition, i.e. boom down, telescope out, or hoist up. The
control lever lockout system is used with the anti-two-block
system or the rated capacity limiter (RCL) system.
Stowing and Parking
When parking the crane, do the following:
1. Park the crane on a stable surface.
2. Remove the load from the hook.
3. Stow the swingaway boom extension, if erected.
4. Fully retract the boom and position it in the normal travel
position.
5. Engage the swing brake and/or swing lock pin.
6. Retract all jack cylinders and outrigger beams.
7. Apply the parking brake.
8. Put all operating controls in the neutral position.
9. Position the Crane Function switch to OFF.
10. Shut down the engine following the proper procedures
specified in this Handbook and the applicable Engine
manual.
11. Remove the keys.
12. Close and lock all windows, covers, and doors.
13. Turn Battery Disconnect to OFF position (shown) if
machine will be inactive for over 24 hours (Figure 3-20).
Unattended Crane
The configuration in which the crane should be left while
unattended shall be determined by a qualified, designated
individual familiar with the job site, configuration, conditions,
and limitations.
DANGER
Tipping Hazard!
Never park the crane near holes, or on rocky or extremely
soft surfaces. This may cause the crane to overturn,
resulting in injury to personnel.
CAUTION
Risk of Undesirable Operation!
To avoid possible engine fault codes and undesirable
operation, ensure the keyswitch has been off two minutes
before disconnecting the batteries.
Disconnect batteries, if machine will be inactive for over
24 hours.
WARNING
Tipping Hazard!
Changing weather conditions including but not limited to:
wind, ice accumulation, precipitation, flooding, lightning,
etc. should be considered when determining the location
and configuration of a crane when it is to be left
unattended.
Failure to comply with these instructions may cause death
or serious injury.
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