Dando TERRIER Mk 1, Operating And Maintenance Manual, Page: 12 / 276

o. The jaws of pipe wrenches should be kept in good order and replaced when
necessary.
p. Pipe or other material should never be used to extend the handle of any type
of wrench or tong to obtain greater leverage.
q. When handling pipe or casing, personnel should not take hold of the male
thread end. They should watch out for sharp burrs on rods and casing, and
discard the rod or file these down before proceeding.
r. Threads of rods or casing should be well coated with suitable grease before
coupling. Operators must use a suitable tool to apply grease, never their
hands.
s. The water swivel hose should be secured to the mast.
t. Personnel should stand clear when using a drill with water swivel and water
hose, since should the water swivel spindle seize and wrap round the rod,
the operator could be pulled into the rotating and drive mechanism.
u. Attempts should not be made to remove water swivel when machine is in
motion.
v. Hoisting plugs and swivels should be kept well lubricated, since an
improperly made up hoisting plug can unscrew when handling rods.
w. Pull should not be exerted simultaneously on hoist and hydraulics since when
the hydraulic lift is released, overload on the hoist rope will occur.
x. Hoist ropes should be examined daily for broken strands and replaced when
necessary.
y. The correct socket should always be used on hoist ropes. Bulldog grips
should never be used as a substitute.
z. When hoisting rods, personnel should keep clear of the cable plugs and rods
until the tension is released on the cable, since the backlash of the cable by
the release of tension can cause the plug to spin rapidly.
aa. Care must be taken in lowering the hoisting plug to the helper. The helper
must be careful that his hands are not caught between the hoisting plug and
the exposed part of the swivel head when breaking out drill rods.
bb. The hoisting plug should always be fully screwed into the rods before
commencing hoisting or lowering, and prior to hoisting should be tightened in
the last rod by means of wrenches.
cc. The steel wire cable should always be wound evenly on the drum.
dd. When necessary to straighten the cable on the hoist drum, the driller should
remain at the hoist controls, and the helper wearing gloves, and from a safe
distance should guide the cable onto the drum.