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276
80-160
Maintenance
Swing System Maintenance
Swing Bearing Bolting Procedure
MAINTENANCE CHECK
It is very important to perform periodic swing bearing bolt checks. The bolts
MUST BE KEPT TORQUE
TIGHTENED
to a rating as indicated in chart below. After the first day, and again after the initial 40 hours
of machine operation, check and tighten the bolts. If additional torque is required after the first 8 or 40
hours, then recheck each 8 or 40 hours until all bolts are found properly torqued. Thereafter, checks
should be performed quarterly.
MODEL 4:1 TORQUE MULTIPIER NO TORQUE MULTIPLIER
80-160
DRY: 245 FT. LBS. (332 NM) DRY: 980 FT. LBS. (1329 NM)
Bolt torques are checked by applying the stated torque while observing to determine if the bolt “breaks
loose”. If it is tightened (turned) by this procedure then it has loosened and all (26) bolts must be retorqued.
Refer to the sequence illustrated below.
RING GEAR BOLTING SEQ UENCE - (shown below).