Grove Published 11-22-2016, Control # 345-12 6-23
RT9130E-2 SERVICE MANUAL SWING SYSTEM
SWING LOCK PIN
Description
The purpose of the swing lock pin is to lock the
superstructure in position directly over the front or the rear of
the carrier. The swing lock pin installation consists of a large
pin, a control handle in the right side of the cab, and a control
cable and linkage that allows the crane operator to set and
free the pin.
When the superstructure is directly over the front, pushing
the control handle in drops the swing lock pin into a socket
on the carrier frame, locking the superstructure in place.
Pulling the control handle out pulls the pin out of the socket,
unlocking the superstructure.
Maintenance
Verify linkage and cable are undamaged and installed to
avoid damage from superstructure rotation. Verify pin, the
turntable bushing the pin passes through, and the sockets on
the frame are undamaged. Verify all attaching hardware is
secure and undamaged.
Ensure linkage and cable are adjusted properly. If they are,
the pin bottom will stick out about 4.0 inches (10.16 cm) from
the bottom of its bushing in the turntable. (If it is too far in, it
might not lock properly. If it is too far out, it might hang up).
Using the jam nuts on the linkage parts and cable, adjust the
linkage and cable so the pin bottom will be flush with the
bottom of its bushing in the turntable when not applied, and
the pin will stick out about 4.0 inches (10.16 cm) from the
bottom of its bushing in the turntable when applied.Verify the
superstructure can lock properly when the pin is applied and
and the superstructure can rotate without pin hangup when
the pin is not applied.
360° SWING LOCK CONTROL—POSITIVE
LOCK TYPE (OPTIONAL)
Description
The purpose of the swing lock is to secure the superstructure
in position at one of the positions in its rotation. There are
roughly 135 spots about 2.7 degrees apart for the
superstructure to lock to in its 360 degree of rotation. The
360 degree swing lock control lever is on the right side of
cab. Pushing the swing lock control lever down engages the
lock between the teeth of the swing gear. Pulling the swing
lock control lever up disengages the lock.
Maintenance
Verify cable is routed to avoid damage from superstructure
rotation and is undamaged. Verify swing lock assembly is
undamaged and working properly. Verify springs are
undamaged and have enough strength to pull blade of swing
lock assembly completely out of the gear teeth when the
control lever is up. Verify the linkage can put the blade of the
swing lock assembly as far as possible between the gear
teeth when the control lever is down.
Verify all attaching hardware is secure and undamaged.
Make adjustments as needed.
If the swing lock assembly is damaged, install a replacement.
Align the blade of the swing lock assembly so it will fall
between gear teeth. Use the shim and the related attaching
hardware (two 5/16-18 screws and 5/16 ID lockwashers) to
ensure the swing lock assembly cannot move side to side,
and can lock the superstructure. Torque the four 1-8
mounting bolts.
As needed, adjust the swing lock control and cable per
above instructions. Then operate the control lever several
times to verify the swing lock blade assembly engages and
disengages properly. Adjust cable as required.
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