Manitowoc Grove GRT880, Operator'S Manual

Page: 130 / 202

OPERATING CONTROLS AND PROCEDURES GRT880 OPERATOR MANUAL
3-66
Published 3-25-2020, Control # 643-04
Traveling — Towing/Pulling
To avoid severe damage to the drive train while using the
crane to tow or pull another vehicle, follow these
recommendations:
• Ensure boom is in a horizontal position and not elevated
above 0°.
• Ensure outrigger beams and jacks are fully retracted
with the pads properly stowed.
• Tow or pull on open ground when possible.
• Connect to the optional pintle hook (if equipped) or
attach cables/straps to the crane at a point no higher
than the pintle hook height.
• Use four-wheel drive when greater traction is necessary.
(Refer to
Four-Wheel Drive Operation , page 3-70 for
operating instructions.)
• 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.
• Conduct all travel with the assistance of a ground person
to warn the operator of any changing conditions in the
terrain being traversed.
Traveling — Being Towed/Pulled
Grove recommends connecting to a pintle hook (if equipped)
or evenly attaching to the tie-down lugs when being towed by
another vehicle.
• Ensure boom is in a horizontal position and not elevated
above 0°.
• Ensure outrigger beams and jacks are fully retracted
with pads properly stowed.
To avoid severe damage to drive train while crane engine is
disabled:
• Disconnect drivelines.
• Disengage parking brake by manually turning parking
brake adjustment until axle turns free.
• Secure steering to prevent turning while towing.
• Conduct all travel with assistance of a ground person to
warn operator of any changing conditions in terrain
being traversed.
Traveling on Slopes
Crane operators need to exercise caution whenever
operating crane on uneven surfaces. Travel on slopes is
permitted as long as the following conditions are met.
• Do not exceed a 15% (8.5°) slope side-to-side or fore-
and-aft.
• Travel must be on an improved surface or hard-packed
dry earth having a minimum 0.5 coefficient of adhesion.
CAUTION
Machine Damage Hazard!
Grove 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.
CAUTION
Machine Damage Hazard!
It is recommended to attach cables/straps to the optional
pintle hook (if equipped) or evenly attach to the tie-down
lugs if being towed by another vehicle.
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.
DANGER
Run-away Crane Hazard!
Disabling parking brake may result in crane rolling away
freely without the ability of the operator to stop the crane.
Ensure wheel chocks are properly placed when parking
crane with the parking brake disabled.
Death or serious injury and damage to machinery could
result from moving machinery.