©2008-2017 McCoy Global
Manual № TM12012
80-0420-23 POWER TONG
Section 5
Page 5.10
Maintenance
5.8 DAILY INSPECTION & MAINTENANCE CHECKLIST
McCoy recommends that the following inspection and maintenance procedures be performed before each use, and at
least once per day when the tong is in steady use, in the order in which they are listed.
1.
Rotate cage plate/rotary gear until the opening in the rotary gear faces towards the rear of the tong.
3.
Remove the majority of dirt and grease build-up from the tong, backup, and frame assembly using a hose with
spray nozzle, or a pressure washer set to the “low pressure” mode. Ensure adequate containment is in place to
prevent environmental contamination from residual hydraulic fluid and dirty grease.
4.
Remove the access panel on the side of the tong directly adjacent to the shifter mechanism.
5.
Use a flashlight to perform a visual inspection of the gear train through the access panel and the opening of the
rotary gear. If gear damage or chips of metal are seen, the tong should be removed from service and overhauled
to avoid further damage.
6.
Perform a visual inspection of all fasteners and protruding body pieces (example: hydraulic valve mounts, inlet
and outlet line supports, tong legs, shifter handle pivot lugs). Tighten or replace loose or missing fasteners. Mc-
Coy recommends that damaged or missing body parts be repaired or replaced as soon as possible.
7.
Inspect the jaws and dies on the tong and backup. Inspect the jaw roller pins for signs of damage - replace pins
if necessary. If the pins are welded in place, replace the entire jaw assembly. Ensure dies are secure in the jaw
- replace worn dies if necessary. Ensure that the jaw rollers rotate freely. Check to ensure the size of the loaded
jaws match the size of casing or pipe you are running.
8.
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.
9.
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).
!
WARNING
DO NOT PERFORM ANY FURTHER ACTIONS OR MAINTENANCE WHILE THE TONG IS CONNECTED
TO ANY HYDRAULIC POWER SUPPLY. MCCOY RECOMMENDS THAT ALL HYDRAULIC LINES ARE
FULLY DISCONNECTED, AND RESIDUAL HYDRAULIC PRESSURE IS BLED OFF. ENSURE ADEQUATE
CONTAINMENT IS IN PLACE TO PREVENT ENVIRONMENTAL CONTAMINATION FROM RESIDUAL
HYDRAULIC FLUID.
2.
Depressurize HyDraulic system in preparation For maintenance:
1. Rotate the tong to the “open throat” position. Ensure tong and backup doors (if equipped) are closed. Fully
extend the lift cylinder.
2. De-energize the power unit.
3. Repeatedly actuate the tong motor control valve lever IN BOTH DIRECTIONS to dissipate any residual
pressure in the valve and motor.
4. Remove the hydraulic SUPPLY line from the equipment.
5. Repeatedly actuate the remaining control valve levers IN BOTH DIRECTIONS to dissipate any residual
pressure in the remainder of the hydraulic control system.
7. Disconnect the hydraulic RETURN line from the equipment.
8. Disconnect remaining hoses such as case drains, or lines connected to the turns counter.
!
WARNING
HYDRAULIC PRESSURES AS HIGH AS OPERATING PRESSURE MAY REMAIN TRAPPED IN SMALL
AREAS OF THE EQUIPMENT. ENSURE ALL MAINTENANCE IS CARRIED OUT BY A QUALIFIED
SERVICE TECHNICIAN, AND THAT ADEQUATE PERSONAL PROTECTIVE EQUIPMENT IS USED TO
GUARD AGAINST PRESSURE INJURIES.
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