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In all Vulcan equipment mechanically bolted connections are kept to the minimum to avoid unnecessary maintenance. Where they are used... Cylinder Heads...Steam Chest Heads... Pipe Flanges...Stuffing Boxes... proper assembly and re-assembly practices should be followed. When assembling hammer components.. it is essential that all nuts be installed on their respective studs using Torque Wrench equipment so as to insure equal and even clamping force on all joints. Given below in table form are the recommended torque levels for the various joints:

NOTES:

• The above Torque Valves apply to both UNC & UNF studs and nuts.
• Always be sure that your torque wrenches are in good condition and calibrated.
• Torque Valves shown are for threads lubricated with light engine oil or grease

Note: Most fastener manufacturers have more complete treatments of proper fastner torque. Since many studs, nuts, bolts and capscrews used on Vulcan hammers are not of Vulcan manufacture or even specifications, it is necessary to follow the recommendations of the fastener manufacturer.

Fastener torque is very much a function of how the threads are lubricated, the size of the threads, their configuration (coarse or fine) and whether you are tightening a bolt head or stud nut.

Also, click here for a reminiscence of a hammer assembly that had a "surprise ending."