6-14
Published 01-29-2014, Control # 496-00
SWING SYSTEM TMS800E SERVICE MANUAL
NOTE: If a lifting device capable of lifting the entire
superstructure is not available, superstructure
weight may be reduced by removing various
components such as the hoist(s).
13. Attach a suitable lifting device to the four superstructure
lifting lugs (two at the boom pivot shaft bushings and two
at the lower lift cylinder pivot shaft bushings). Take in
cable or chain to remove slack. Do not pull up on the
superstructure.
NOTE: It will be necessary to rotate the superstructure
while attached to the lifting device. Outer race bolts
can only be removed from the front or from under
the cab.
14. Remove the 72 bolts and washers securing the turntable
bearing outer race to the carrier.
15. Carefully lift the superstructure, using care not to
damage the swivel assembly, and set it on blocking that
will not allow the superstructure to tilt or shift, or rest on
the swivel. Leave the lifting device attached.
NOTE: If the same bearing is to be used again, mark the
position of the bearing on the superstructure so it
can be installed in the exact position it was before
removal.
NOTE: The bearing weighs approximately 704 kg (1886 lb)
depending on the bearing. Ensure the bearing
lifting device is capable of supporting the weight.
16. Place an adequate lifting device under the bearing and
remove the 72 bolts and washers securing the turntable
bearing to the superstructure.
17. Using the lifting device, remove the turntable bearing
from under the superstructure.
Inspection
Check the bearing teeth for chipping or cracking. If any
evidence of these is found, replace the bearing. Ensure the
bolt holes are free of dirt, oil, or foreign material.
Installation
NOTE: If the same bearing is to be used again, align the
marked teeth on the pinion shaft and the marked
teeth on the bearing.
Installation is in the travel position. Ensure the
swing lock is disengaged before attempting to mate
the bearing to the superstructure.
1. Using an appropriate lifting device, position the turntable
bearing under the superstructure. If the same bearing is
being used, position it as marked prior to removal.
2. Install 72 new bolts and washers securing the bearing to
the superstructure. Refer to Inner Race Torquing in this
Sub-Section.
3. Using an appropriate lifting device, align the
superstructure over the carrier in the travel position and
carefully lower the superstructure, being careful not to
damage the swivel assembly, into position on the carrier
bearing plate.
NOTE: It will be necessary to rotate the superstructure
while attached to the lifting device. Outer race bolts
can only be installed from the front or from under
the cab.
4. Install 72 new bolts and washers. Refer to Outer Race
Torquing in this Sub-Section.
NOTE: If a new bearing is being installed, a new pinion
gear must also be used. Align the high point
(maximum eccentricity) on the bearing with the
new pinion gear high point (see Figure 6-4).
DANGER
Ensure the lifting device is capable of fully supporting the
weight of the superstructure. Ensure the superstructure
will not tilt or slide during lifting and moving. Failure to do
so may result in death or injury to personnel and damage
to equipment.
DANGER
Ensure the superstructure is fully supported before
proceeding.
DANGER
Ensure that any blocking material used is capable of fully
supporting the weight of the superstructure and will not
allow it to tilt or shift. Failure to do so may result in death or
injury to personnel.
DANGER
Anytime a metric grade 10.9 turntable bolt has been
removed, it must be replaced with a new grade 10.9 bolt.
Reference Only
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