Komatsu 06253 Operation & Maintenance Manual page 357

MAINTENANCE
High-Strength Bolt Connections (continued)
Check condition and fastening of the swing gear (01) and
swing motor (02), illustration Z22642
* SW = Wrench size
Reference No.:
(8)
(25) Socket head
cap screw
Check all mounting bolts (8 and 25) for correct tightening
torque.
Re-tighten loose mounting bolts and replace missing or dam-
aged bolts.
REMARK
After checking and retightening of swing gear mounting bolts
(25), attach protection caps (26) onto the bolt heads.
Bolt size
Grade
mm
M 16 10.9
M 24 12.9
4.12 EVERY 1000 OPERATING HOURS OR EVERY 6 MONTH
SW * Tightening torque
mm Nm
24 265
19 1030
Qty.
16
24
357