Manitowoc Published 08-12-19, Control # 224-13 3-59
MLC650 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
CAB TILT ADJUSTMENT
To adjust the speed at which the cab tilts up and down,
proceed as follows.
See Figure 3-10
for the following procedure:
1. Loosen the set screws.
2. Turn the knobs fully clockwise to close the valves.
3. Open both valves slightly.
4. Test the cab tilt operation with the switch on the control
console in the cab.
5. Repeat the steps until the cab tilt starts and stops
smoothly in both directions.
6. Securely tighten the set screws.
OPERATING IN WIND
Wind adversely affects lifting capacity and stability. The
result could be loss of control over the load and crane, even
if the load is within the crane’s capacity.
Do not raise boom for the purpose of measuring the wind
speed with the crane’s anemometer.
Wind speed (to include wind gusts) must be monitored by job
planners and supervisors.
The wind speed at the boom or jib point can be greater than
the wind speed at ground level. Also be aware that the larger
the sail area of the load, the greater the wind’s affect on the
load.
As a general rule, ratings and operating speeds must be
reduced when the wind causes load to swing forward
past allowable operating radius or sideways past either
boom hinge pin.
For wind conditions specific to this crane, see the Wind
Conditions chart at the end of this section or, if applicable,
see the wind conditions in the capacity charts provided with
the crane and attachment.
Item Description
1 Tilt DOWN Flow Control Valve
2 Tilt UP Flow Control Valve
3 Adjusting Knob
4Set Screw
Near Cab On Left Side of the Rotating Bed
Figure 3-10. Cab Tilt Valves
WARNING
Tipping Crane Hazard
The judgment and experience of qualified operators, job
planners, and supervisors shall be used to compensate
for the affect of wind on the lifted load and the boom by
reducing ratings or operating speeds, or a combination of
both.
Failing to observe this precaution can cause the crane to
tip or the boom and/or jib to collapse. Death or serious
injury to personnel can result.
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