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Grove
Published 01-14-2021 Control # 707-01
4-1
TMS9000-2 SERVICE MANUAL
SUPERSTRUCTURE
4
SECTION 4
SUPERSTRUCTURE
SECTION CONTENTS
Hoist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Boom Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Boom Installation . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Functional Check . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Boom Nose Sheaves . . . . . . . . . . . . . . . . . . . . . . 4-13
Boom Nose Sheaves Removal . . . . . . . . . . . . . . 4-13
Boom Nose Sheaves Installation . . . . . . . . . . . . 4-17
Boom Disassembly. . . . . . . . . . . . . . . . . . . . . . . . 4-17
Boom Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Telescope Section 5 Assembly. . . . . . . . . . . . . . 4-18
Telescope Section 4 Assembly. . . . . . . . . . . . . . 4-22
Telescope Section 3 Assembly. . . . . . . . . . . . . . 4-25
Telescope Section 2 Assembly. . . . . . . . . . . . . . 4-28
Telescope Section 1 Assembly. . . . . . . . . . . . . . 4-31
Telescope Base Section Assembly. . . . . . . . . . . 4-37
Pinning Boom Components . . . . . . . . . . . . . . . . 4-38
Mechanical Locking Head Description . . . . . . . . 4-38
Proximity Switch Descriptions. . . . . . . . . . . . . . . 4-39
Hydraulic Actuator Description . . . . . . . . . . . . . . 4-41
Precision Length Sensor Description . . . . . . . . . 4-42
Pinned Boom Control System Description . . . . . 4-42
Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
Bleeding Procedure . . . . . . . . . . . . . . . . . . . . . . . 4-44
Telescoping Status . . . . . . . . . . . . . . . . . . . . . . . 4-45
Telescope Slide Pad Adjustment . . . . . . . . . . . . . 4-46
Check the Locking System. . . . . . . . . . . . . . . . . . 4-46
Hoist Ropes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Checking the Position of Sheaves and
Rope Drums. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Wire Rope Inspection/Replacement
(All Wire Rope). . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Rated Capacity Limiter . . . . . . . . . . . . . . . . . . . . . 4-52
Maintenance of the Slip Ring Assembly
of the Cable Drum . . . . . . . . . . . . . . . . . . . . . . . . 4-52
Lubricating the Swing Angle Sensor . . . . . . . . . . 4-54
Checking Hoses. . . . . . . . . . . . . . . . . . . . . . . . . . 4-55
Other Maintenance Work . . . . . . . . . . . . . . . . . . . 4-55
Checking for Correct Operation of the Auxiliary
DESCRIPTION OF MAINTENANCE WORK
ON THE SUPERSTRUCTURE
Hoist
Description
One standard hoist is available for both the main and
auxiliary (Figure 4-2). The hoist incorporates one dual
displacement piston motor which drives a reduction unit
within the hoist. The hoist utilizes planetary reduction with a
multi-disc automatic brake that is spring applied and
hydraulically released. The hoist motor controls both speed
and torque of the hoist. The hoists operate in two modes -
High or Low Speed.
The main hoist and the auxiliary hoist of identical
construction are located on the superstructure turntable. The
auxiliary hoist is located behind the main hoist.
Theory of Operation
Flow from pump number one and two is routed through the
swivel to the directional control valve bank.
When the main hoist joystick in the cab is moved from
neutral, it sends an electrically controlled signal to the main
hoist directional control valve to shift the valve spool to route
hydraulic flow to the hoist motor or motor control valve.
When the auxiliary hoist joystick in the cab is moved from
neutral, it sends an electrically controlled signal to the
auxiliary hoist directional control valve to shift the valve spool
Reference
Only