Grove Published 11-10-2014, Control # 524-00 5-11
RT880E SERVICE MANUAL HOISTS AND COUNTERWEIGHT
C O U N T E R W E I G H T R E M O V A L
Removal of Standard Counterweight and
Auxiliary Hoist
1. Position the crane on a firm, level surface. Fully extend
and set the outriggers. Level the crane.
2. Position the superstructure over the front of the machine
and engage the turntable lock.
3. Remove any load and handling device from the auxiliary
hoist cable and retract all cable onto the hoist drum.
Secure the cable.
4. Disconnect and secure the auxiliary hoist hydraulic lines
and electrical harness.
5. Remove the ball detent pins which secure the counter-
weight mounting pins.
NOTE: It may be necessary to retract the counterweight
removal cylinders to relieve weight from the coun-
terweight mounting pins.
6. Ensure the counterweight removal cylinder support pins
are securely attaching the counterweight to the turntable
wing/support brackets. Disengage the counterweight
mounting pins using the pinning control lever (center).
7. Using the control levers (left and right), simultaneously
extend (lower) the counterweight onto the frame coun-
terweight supports. Feather individual controls as
required to lower the counterweight in a level position.
8. Remove the counterweight removal cylinder support
pins from turntable wing/support brackets and using the
control levers (left and right) retract the counterweight
removal cylinders fully.
9. Disconnect and secure the counterweight removal cylin-
der hydraulic lines and replace the counterweight
removal cylinder support pins on the turntable wing/sup-
port brackets.
10. Properly attach the supplied slings to the counterweight
lifting holes and use a crane to carefully transfer the
counterweight and auxiliary hoist to the ground or a suit-
able transport vehicle.
Installation of Standard Counterweight and
Auxiliary Hoist Mounting Structure
1. Position the crane on a firm, level surface. Fully extend
and set the outriggers. Level the crane.
2. Position the superstructure over the front of the machine
and engage the turntable lock.
3. Properly attach the slings to the counterweight lifting
holes and use a crane to carefully transfer the counter-
weight and auxiliary hoist to the frame counterweight
supports over the rear outrigger box.
4. Attach the counterweight removal cylinder hydraulic
lines.
5. Using the control levers (left and right) extend the coun-
terweight removal cylinders, one at a time, guiding them
into the turntable wing/support brackets and pin
securely.
6. Using the control levers (left and right) simultaneously
retract (raise) the counterweight removal cylinders until
the counterweight round bar engages the lugs on the
turntable and the counterweight pinning holes are
aligned with the counterweight mounting pins. Feather
individual controls as required to raise the counterweight
in a level position.
7. Engage the counterweight mounting pins using the con-
trol lever (center).
8. Attach the ball detent pins securing the counterweight
mounting pins.
9. Relieve pressure on the counterweight removal cylinder
so that weight is fully supported by the counterweight
mounting pins.
10. Attach the auxiliary hoist hydraulic lines and electrical
harness.
Removal of Counterweight without Auxiliary
Hoist
1. Position the crane on a firm, level surface. Fully extend
and set the outriggers. Level the crane.
2. Position the superstructure over the front of the machine
and engage the turntable lock.
3. Remove the ball detent pins which secure the counter-
weight mounting pins.
NOTE: It may be necessary to retract the counterweight
removal cylinders to relieve weight from the coun-
terweight mounting pins.
DANGER
Assemble the counterweight and auxiliary hoist structure
on the ground or on a suitable transport vehicle. Do not
attempt to assemble on the counterweight stand, the
auxiliary hoist structure may hit the counterweight and
knock it off the stand.
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