OPERATING CONTROLS AND PROCEDURES RT770E OPERATOR MANUAL
3-28 Published 04-04-2017, Control # 446-09
Use four-wheel drive only when greater traction is necessary.
(Refer to Four-Wheel Drive Operation, page 3-33 for
operating instructions.)
There are two tow/tie-down lugs installed on each end of the
crane. Use both lugs to tow or pull the crane.
Ensure the outrigger beams and jack cylinders are fully
retracted with the floats properly stowed.
• Use four-wheel drive only when greater traction is
necessary. (Refer to Four-Wheel Drive Operation, page
3-33 for operating instructions.)
• Ensure the outrigger beams and jack cylinders are fully
retracted with the floats properly stowed.
• Conduct all travel with the assistance of a ground person
to warn the operator of any changing conditions in the
terrain being traversed.
The owner/lessee must take appropriate measures to
ensure that all persons operating or working with the affected
models are in compliance with The Manitowoc Company,
Inc. recommendations. The operator of the crane assumes
responsibility for determining the suitability of traveling
conditions. Traveling under the controlled conditions
specified in these guidelines, must be conducted with the
utmost diligence and care to ensure the safety of all
CAUTION
Machine Damage Hazard!
Traveling at speeds greater than 16 km/h (10 mph) with
the fixed counterweight installed and the boom extension
stowed can result in axle failure if the boom angle is less
than 10°.
When traveling at speeds greater than 16 km/h (10 mph)
in the above configuration, ensure that the boom is
elevated to an angle between 10° to 20° and the hook
block is stowed in the storage tray.
CAUTION
Machine Damage Hazard!
Traveling at speeds greater than 16 km/h (10 mph) with
the hydraulically removable counterweight installed and
the boom extension stowed can result in axle failure if the
boom angle is less than 15°.
When traveling at speeds greater than 16 km/h (10 mph)
in the above configuration, ensure that the boom is
elevated to an angle between 15° to 20° and the hook
block is stowed in the storage tray.
CAUTION
Machine Damage Hazard!
Do not travel with an empty hook in a position where it can
swing freely (except where noted). Either remove the
hook block and/or headache ball from the hoist cable(s)
and stow securely or make sure the hook block or
headache ball is properly secured to the tie down
provided for that purpose.
Do not drive the crane with the lift cylinder bottomed. At a
minimum, position the boom slightly above horizontal.
Fully retract the outrigger jack cylinders and properly store
the floats.
Disengage Main Hydraulic Pump via pump disconnect for
cold weather starting of the engine (Sub-Zero). Pump
must be re-engaged for travel.
CAUTION
Machine Damage Hazard!
On open ground, tow or pull only on the tow/tie-down lugs
or with the optional pintle hook.
Do not tow or pull in 1st gear with the Drive Axle Selector
Switch in two-wheel drive position. Severe damage to the
drive train will result. Always engage four-wheel drive.
Should the crane become mired down, use a tow truck or
tractor to free the vehicle. Severe damage to the
transmission or axles may occur if the operator attempts
to free the crane unassisted.
CAUTION
Machine Damage Hazard!
Manitowoc recommends towing or pulling another vehicle
with the optional pintle hook (if equipped) or by attaching
at a point no higher than the pintle hook height, or severe
damage may occur to the drivetrain.
Do not tow or pull by attaching to the tie-down lugs unless
the attaching point is no higher than the pintle hook
height.
Use four-wheel drive when greater traction is necessary
to avoid severe damage to the drivetrain.
Should the crane become mired down, use a tow truck or
tractor to free the vehicle. Severe damage to the
drivetrain may occur if the operator attempts to free the
crane unassisted.
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