MAINTENANCE CHECK
It is very important to perform periodic ring gear bolt
checks. The bolts MUST BE KEPT TORQUE TIGHT-
ENED to a rating of 980 Ft
.
Lbs. (1329 NM). After the initial
40 hours of machine operation, check and tighten the bolts.
If additional torque is required after the first 40 hours, then
recheck each 40 hours until all bolts are found properly
torqued. Thereafter, checks should be performed QUAR-
TERLY.
RING GEAR TORQUING
The gear and bearing assembly consists of an inner race and
ring gear, an outer race, bearing rollers, spacer and a seal
ring. The inner race is bolted to the carrier; the outer race to
the turntable.
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 and nuts, shanks of bolts
which hang up on holes, etc. All of these causes have a ten-
dency to absorb the torque when bolts are being tightened.
It is important to make periodic checks of the ring rear bolts.
The bolts Must be kept torque tightened.
Torque the inner race first, then the outer race as shown in
the bolting sequence. Torque the 1 inch, Grade 8, bolts to
980 Ft. Lbs. (1328 NM)
Issued: August 20036 - 15
SERVICE AND ADJUSTMENTS
SWING BEARING
RT700 Series
RING GEAR BOLTING SEQUENCE
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