CHASSIS AND TURNTABLE ASSEMBLY
AB16EJ Plus Maintenance Manual 41
© Mar. 2023
1. Main boom fully retracted;
2. Boom tube fully elevated;
Fig 10 Checking slewing bearing connecting bolts (b)
1. Main boom fully extended;
2. Main boom horizontal.
Disassembly and Installation
Disassemble slewing motor
1. Make sure the turntable is locked (if equipped with a
rotary pin, make sure the rotary pin is locked).
2. Mark and disconnect the hydraulic pipelines on the
slewing motor and collect the hydraulic oil in the
pipelines with a suitable vessel. Then seal the pipe-
lines and ports.
3. Remove the slewing motor from the slewing bearing
by removing the mounting bolts at position #1.
Disassemble the slewing bearing
1. Reliably support the boom with suitable lifting
equipment.
2. Mark and disconnect the hydraulic pipelines on the
slewing mechanism and collect the hydraulic oil in
the pipelines with a suitable vessel. Then seal the
pipelines and ports.
3. Support the turntable with suitable lifting equipment.
4. Use appropriate tools to draw a line on the inner ring
of the slewing bearing and at the bottom of the turn-
table as a mark to align the slewing bearing for
installation.
5. Remove the bolts and washers at position #1 that
connect the turntable to the inner ring of the slewing
bearing.
6. Slowly remove the entire turntable assembly from
the slewing bearing with the assistance of lifting
equipment and place the turntable on a bracket that
provides proper support.
NOTICE
Take extra care when removing the turntable to
avoid damage to the turntable, slewing bearing
and other parts on the machine.
7. Use appropriate tools to draw a line on the outer
ring of slewing bearing and on the upper part of the
chassis as a mark to align the bearing for mounting.
8. Remove the bolts and washers at the position #2
that connect the chassis to the outer ring of the
slewing bearing.
9. Remove the slewing bearing from the chassis using
suitable lifting equipment and place the slewing
bearing in a clean work area that provides proper
support.
NOTICE
Do not reuse removed bolts and washers, and
replace with new fasteners.
Install slewing bearing
1. Clean the removed slewing bearing and take care
not to damage its sealing performance.
2. Use suitable lifting equipment to lift the slewing
bearing to the mounting surface of the chassis,
aligning the outer ring of the slewing bearing with
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