stellar labs CDT Plus 7621 - Gear-Bearing Bolt Maintenance

Page 22 | Stellar
®
Heavy-Duty Telescopic Crane Owner’s Manual
Rotation Gear Bearing Thread Tightening Procedure
Gear-Bearing Bolt Maintenance
Step 1: Refer to the Torque Data Chart on the previous page to determine the proper torque value
based on the size of bolt used.
Step 2:
Torque all bolts to approximately 40% of the specified torque value using the tightening
sequence shown above. Note: The number of bolts may be different than shown in the
diagram but the sequence will work using the same pattern in relation to Bolt #1.
Step 3: Torque all bolts to 75% of the specified torque value using the tightening sequence shown
above.
Step 4: Torque all bolts to the listed torque value using the tightening sequence shown above.
1
2
3
4
5
6
7
8
9
24
10
11
1213
14
15
16
17
18
19
20
21
22
23
Once a bolt has been torqued to 75% of its proof load and then removed, the torque coefficient
may no longer be the same as when the bolt was new thus giving indeterminate damp loads after
torquing.
WARNING
Anytime a gear-bearing bolt is removed, it must be replaced with a new bolt of
the identical grade and size.
NOTICE
Always use Red Loctite Threadlocker sealant to secure the new bolt.