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
T300-1 DRY: 181 FT. LBS. (245 NM) DRY: 725 FT. LBS. (983 NM)
T500-1 DRY: 180 FT. LBS. (244 NM) DRY: 725 FT. LBS (976 NM)
T775 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 SEQUENCE-(T300-1, T500-1, T780 shown below).
333P/N 12261-683 REVISED: January 2015
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