Komatsu 06253 Operation & Maintenance Manual page 361

MAINTENANCE 4.12 EVERY 1000 OPERATING HOURS OR EVERY 6 MONTH
High-Strength Bolt Connections (continued)
Swing circle (01), illustration Z20864
Check tightening torque of inner and outer mounting bolts (02 and
04) according to PARTS & SERVICE NEWS, No. AH00511.
NOTICE
Checking/retightening of swing circle mounting bolts is only
necessary after the first 1000 operating hours.
Check condition and fastening of swing circle guard (10) and bolts
(15).
361