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277
SWING BEARING TORQUE PROCEDURE
A number of causes can reduce tension in the bolts when torquing and after use. These include rust on
the threads, damaged or rough threads on bolts or nuts, shanks of bolts which hang up on holes, etc.
All of these causes have a tendency to absorb the torque when bolts are being tightened.
All the fasteners inside the upperstructure and the four outside must be checked. This includes a total
of sixtyfour (64) capscrews to be checked. If ANY are found to have loosened, ALL sixty-four (64) must
be retorqued.
Remember, it is important to perform periodic checks of the swing bearing bolts. The bolt MUST BE
KEPT TORQUE TIGHTENED.
The following equipment is required for checking swing bearing bolt torque:
DESCRIPTION
(1) 3/4 drive ratchet head torque wrench with 200 lb. capacity
(1) 16” extension - 3/4 drive.
(1) 8” extension - 3/4 drive
(1) 7/8” 12 pt. socket - 3/4 drive.
(1) special wrench pn. 706F8697.
(1) 4 to 1 torque multiplier.
(1) 1” 12 pt. socket-3/4 drive.