80-0420-23 POWER TONG
Manual № TM12012
Section 5
Page 5.13
©2008-2017 McCoy Global
Maintenance
5.9 MONTHLY MAINTENANCE CHECKLIST (CONTINUED):
8.
Inspect tong for signs of premature wear, or moving parts that are rubbing (bare metal where there used to be
paint is a good indication of wear.
9.
Inspect all paint - locations in which the paint has been damaged must be repaired prior to the tong being
returned to service. Prepare areas to be painted to ensure they are free of grease, dirt, or solvent. Touch up
using a solvent-based acrylic paint. Allow sufficient time for paint to dry before proceeding.
10.
Inspect all external welds. Any weld that is cracked or separating must be repaired and repainted before returning
the tong to service.
11.
Perform a visual inspection of all lifting points - if visible damage is seen, including cracks, broken lugs, distorted
metal, etc. replace damaged part(s) before placing tong in service. Also inspect all chains, master links, and
turnbuckles - again, if any damage is noted replace the damaged part(s) before placing the tong in service. Refer
to Section 3.1 of the technical manual for information on recommended testing and recertification.
12.
Inspect all jaws and dies used since the last monthly inspection. Inspect jaw roller pins for signs of damage -
replace pins if necessary. If damaged pins are welded in place, remove and quarantine the jaw until the weld is
repaired. Ensure dies are secure in the jaw - replace worn dies if necessary. Ensure that the jaw rollers rotate
freely.
13.
Inspect backing pin(s). Replace cracked, broken, or bent pins.
14.
Inspect top and bottom brake band linings - replace if necessary. Unequal wear of the brake bands indicates that
the brake band tension is not evenly adjusted. Refer to the maintenance section of the manual for instructions
on properly adjusting brake bands.
15.
Test the door latching mechanism. Ensure the latch fully engages the tong body when the door is closed.
16.
Perform a visual inspection of all hydraulic lines. Replace flexible lines if they appear to be cracked, fatigued,
or have visible signs of wear from contact with a rigid object. If your tong is equipped with rigid hydraulic lines,
replace any line that is dented or appears to be stressed or cracked.
17.
Generously fill the gear train housing with grease. Perform a full lubrication per section 5 of this manual.
18.
Ensure main supply and return connections to the tong are fully made up. Reconnect the remainder of the
hydraulic lines, and, if applicable, the electrical line to the turns counter.
If using a stand-alone power unit, start it now. Refer to the power unit technical manual for startup procedures. Listen to power
unit for a moment to see if there are any unusual mechanical sounds (rubbing, grinding, excessive pump noise). If using a
diesel unit, allow sufficient time for the engine to reach operating temperature before increasing engine RPM. Once engine is
warm, gradually increase engine RPM until operating speed is reached.
19.
Ensure that supply pressure is at or above the tool’s specified operating pressure, and that the return pressure
is less than 350 PSI.
20.
Perform a visual inspection of pressurized hydraulic lines. If any hydraulic fittings or hoses are leaking they must
be repaired or replaced before proceeding.
21.
Rotate tong for one minute, stop, and reverse the direction of rotation for another minute, finishing with the open-
ing of the rotary gear facing the gear train. De-energize the power unit, and perform another generous lubrication
of the gear train, including the gear housing.
22.
Energize power unit. Rotate tong for one minute, stop, and reverse the direction of rotation for another minute,
ending with the opening of the rotary gear facing the gear train.
23.
De-energize the power unit, and perform a third generous lubrication of the gear train, including the gear housing.
24.
Rotate tong at low speed for 5 minutes while monitoring pressurized seals and hydraulic lines. If a seal, line, or
fitting begins to leak while tong is rotating, it must be replaced before the equipment is returned to service.
!
WARNING
FAILURE TO ENSURE THAT THE SELF-SEALING SUPPLY AND RETURN LINES ARE FULLY MADE UP
MAY RESULT IN CATASTROPHIC EQUIPMENT FAILURE.
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