Manitowoc Grove TMS9000-2 Series, Руководство по обслуживанию

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Published 01-14-2021 Control # 707-01
6-17
TMS9000-2 SERVICE MANUAL SWING SYSTEM
6
Grove
Hydraulic Swivel
Description
Each of the ports on the spool and case of the swivel is
stamped with the port number. Theory of Operation
The hydraulic swivel allows oil to flow from the pumps to
various crane functions on the superstructure. All oil is
routed into the spool portion of the swivel where, through a
series of internally drilled passages, oil is transferred to
circumferential channels on the spool exterior. These
channels correspond with a mating port on the outer case of
the swivel. Each channel is separated by a series of nylon
and O-ring seals that prevent transfer of oil and pressure.
Return flow from the crane superstructure is accomplished in
the same manner through another set of ports.
Maintenance
Removal
1. Extend and set the outriggers. Ensure the crane is level
and the boom is over the front.
2. Elevate the boom and note at what boom angle, you
have the most clearance between the lift cylinder and
the turntable side plate. Shut down the engine.
3. Measure the distance from the top of the lift cylinder to
the base of the boom section where the lift cylinder
attaches. Cut two pieces of 10 x 10 cm (4 x 4 in)
hardwood timbers.
NOTE: It might be necessary to raise the boom slightly to
allow installation of the blocking.
This blocking is to add extra support for the boom.
Any seepage or leakage in the holding valves or
internally in the cylinders will allow the boom to
settle over a period of time.
4. Use the blocking to block between the barrel of the lift
cylinder and the boom base section.
5. Tag and disconnect the hydraulic lines from the case of
the hydraulic swivel. Cap or plug all lines and openings.
6. Tag and disconnect the hydraulic lines from the spool of
the hydraulic swivel. Cap or plug all lines and openings.
7. Disconnect the swivel wiring harness connectors from
the carrier receptacles and the ground wire from the
connector mounting bracket on the carrier frame. If
necessary, remove the electrical swivel. Refer to
Electrical Swivel, page 6-18
.
NOTE: The hydraulic swivel weighs approximately 93.8 kg
(207 lb). The hydraulic and electrical swivel
combined weigh approximately 236 kg (520 lb).
8. On the bottom of the swivel, bend the retainer tabs away
from the capscrew heads. Remove the eight capscrews
and four capscrew retainers securing the two retainer
plates to the spool. Remove the retainer plates from the
spool and the lugs on the carrier frame.
NOTE: It may be necessary to remove some drive line
components to remove the swivel.
9. Position an adequate supporting device beneath the
swivel.
10. Remove the four capscrews and washers securing the
swivel barrel to the turntable base plate and lower the
swivel to the ground.
Installation
NOTE: The hydraulic swivel weighs approximately 93.8 kg
(207 lb). The hydraulic and electrical swivel
combined weigh approximately 236 kg (520 lb).
1. Raise the swivel into position.
2. Secure the hydraulic swivel to the turntable base plate
with the capscrews and washers. Torque the bolts
according to the specifications in
Fasteners and Torque
Values, page 1-9
.
3. Position the two retainer plates on the hydraulic swivel
spool ensuring they engage the lugs on the carrier
frame. Secure the retainer plates with eight capscrews
and four capscrew retainers.
Apply Loctite 271 to the capscrew threads. Torque the
bolts according to the specifications in
Fasteners and
Torque Values, page 1-9
. Bend all the retainer tabs to
make contact with the capscrew heads. Tighten the four
retainer plate capscrews against the lugs on the carrier
frame and tighten the locking nuts.
4. If removed, install the electrical swivel. Refer to
Electrical Swivel, page 6-18
. Connect the swivel wiring
harness connectors to the carrier receptacles and the
ground wire to the mounting bracket on the carrier
frame. Use the bolt and star washers taken off at
removal and refer to Grove Engineering Specification A-
829-100386 for proper electrical termination of grounds.
5. Install the clamp, lockwasher, flat washer and capscrew
to the bottom of the swivel retainer plate securing the
wiring harness.
NOTE: Allow a 1/32” max gap between bolt and the
retaining lug on the frame. Do not tighten bolt
against lug.
6. Connect the hydraulic lines to the spool of the hydraulic
swivel as tagged during removal.
7. Connect the hydraulic lines to the hydraulic swivel case
as tagged during removal.
8. Remove the blocking material from the lift cylinder.
9. Activate all systems; cycle all functions and observe for
proper operation and any leakage.
Fo
r
Reference
Only