National Crane 600H, Service Manual

Page: 148 / 232

SWING 600H SERVICE MANUAL
6-10
08-19-2022 Control # 092-13
BEARING REPLACEMENT
Removal
1. Fully extend and set the outriggers enough to take up
the slack in the pads.
NOTE: Do not raise the machine on the outriggers.
2. Rotate the boom to about 10° off the rear position so that
the boom is clear of the boom rest.
NOTE: The lift cylinder pins need to be accessible from the
truck deck.
3. Elevate the boom slightly and shut down the engine.
4. Tag and disconnect the battery cables.
5. Remove the boom and lift cylinder following the
procedures outlined in Boom Removal pg 4-3.
NOTE: If equipped with a swivel, tag and disconnect all
hydraulic lines from the swivel on the carrier side.
Cap or plug all lines and openings. The swivel is
removed with the turret.
6. Attach a suitable lifting device to the turret. Remove any
slack in the sling. Do not pull up on the turret.
7. Remove all bolts and washers from the outer race of the
swing bearing.
FIGURE 6-12
1
2
3
4
5
6
7
8
DANGER
Ensure the lifting device is capable of supporting the
boom assembly.
DANGER
Ensure blocking material can support the turret.
!
!
REFERENCE ONLY