Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
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Nut-and-Locknut Technique
The nut-and-locknut technique serves to prevent a nut from loosening by superimposing another nut.
Thus it is possible to use as a fastening
device. This technique is useful to
remove and tighten the studs from the
gearbox.
Two wrenches are used to tighten one
nut against the other so they cannot
loosen.
To loosen both nuts two wrenches are
used turning in the opposite direction.
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
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