TM 5-3895-379-23-2
FIELD MAINTENANCE
GENERAL TORQUE LIMITS
HOW TO USE THE TORQUE TABLE
This work package provides general torque limits for the different fasteners used on the Roller, Motorized, Vibrating
Tandem Steel Drums: Caterpillar Models CB534B and CB534C. The general torque limits shall be used when
specific torque limits are not indicated in the maintenance procedure. Some component installations and fasteners
may have special torque considerations as follows:
These general torque limits cannot be applied to screws that retain rubber components. The rubber
components will be damaged before the torque limit is reached. Tighten the screw until it touches the metal
bracket, then tighten it one more turn.
Do not use these values if a different torque value or tightening procedure is given for a specific application.
Torque values listed are for general use only. Check tightness of fasteners periodically.
Shear bolts are designed to fail under predetermined loads. Replace shear bolts only with fasteners of the
identical property class.
Fasteners should be replaced with the same or higher property class. If higher property class fasteners are
used, these should only be tightened to the strength of the original fastener.
Make sure fastener threads are clean and that you properly start thread engagement. This will prevent them
from failing when tightening.
Tighten plastic insert or crimped steel-type locknuts to approximately 50 percent of the dry torque shown in
the table, applied to the nut, not to the bolt head. Tighten toothed or serrated-type locknuts to the full torque
value.
Tighten cap screws having locknuts to approximately 50 percent of amount shown in table.
Use only metric tools on metric hardware. Other tools may not fit properly.
Using a thread pitch gage, determine fastener size and thread pitch and find torque values in the tables as follows:
1. Measure the diameter of the screw being installed with the bolt and thread gage.
M1317SWR
Figure 1.
Bolt and Thread Gage.
03/15/2011Rel(1.8)root(torquewp)wpno(M00222)
