CHASSIS AND TURNTABLE ASSEMBLY
AB16EJ Plus Maintenance Manual 39
© Mar. 2023
Fig 7 Diagram of lubricating slewing bearing
Inspect Slewing Bearing Bolts
It is recommended to check the slewing bearing bolts
after the first 50 hours of operation, and every 3 months
or 250 hours of operation thereafter.
If any bolt is found to be missing or slack, replace it with
a new bolt, apply Loctite 272 threadlocking adhesive to
the bolt thread and tighten the bolt with the torque speci-
fied in the Torque Specifications section. After replac-
ing and tightening the slewing bearing bolt, re-inspect
the bolt for tightness.
Fig 8 Instruction for inserting feeler gauge
Check the connecting bolt between the chassis
and the slewing bearing
1. Adjust the machine to the position as shown in the
Figure (b) below.
2. Locate the connecting bolt between the chassis and
the slewing bearing.
3. As indicated by Page 39, Instruction for inserting
feeler gauge, insert the 0.04mm (0.0016in) feeler
gauge between the bolt and washer in the quadrant
opposite to the turntable counterweight.
4. Make sure that the feeler gauge will not penetrate
under the bolt head to the bolt shank.
5. Rotate the turntable 90° to check the bolts in the
next quadrant.
6. Rotate the turntable 90° again until all bolts have
been inspected.
Check the connecting bolts between the turnta-
ble and the slewing bearing
1. Adjust the machine to the position as shown in the
Figure (b) below.
2. Locate the connecting bolt between the turntable
and the slewing bearing.
3. As indicated by Page 39, Instruction for inserting
feeler gauge, insert the 0.04mm (0.0016in) feeler
gauge between the bolt and washer in the semi-
circle opposite to the turntable counterweight.
4. Make sure that the feeler gauge will not penetrate
under the bolt head to the bolt shank.
5. Adjust the machine to the position as shown in the
Figure (a) below.
6. As indicated by Page 39, Instruction for inserting
feeler gauge, insert the 0.04mm (0.0016in) feeler
gauge between the bolt and washer in the other
semicircle (turntable counterweight).
7. Make sure that the feeler gauge will not penetrate
under the bolt head to the bolt shank.
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