Farr 80-0420-16, Техническое руководство

Страница: 59 / 165

KT5500 5-
1
/
2
” T
ong
& CLInCHER® B
aCKup
S
ECTIon
C
onTEnTS
3.21
T
ECHnICaL
M
anuaL
I. DAILY INSPECTION & MAINTENANCE CHECKLIST (POWER TONG)
Farr 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.
Perform an initial wash of the tong in order to remove the majority of dirt and grease build-up. Ensure adequate contain-
ment 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. Replace access panel when inspection is complete.
6.
Perform a visual inspection of all fasteners and protruding body pieces (example: hydraulic valve mounts, inlet & outlet
line supports, tong legs, shifter handle pivot lugs). Tighten or replace loose or missing fasteners. Farr recommends that
damaged or missing body parts be repaired or replaced as soon as possible.
7.
Inspect the jaws and dies. 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.
10.
Inspect backing pin(s). If cracked, broken, or bent it (they) must be replaced.
11.
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.
12.
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.
DO NOT PERFORM ANY FURTHER ACTIONS OR MAINTENANCE WHILE THE TONG IS CON-
NECTED TO ANY HYDRAULIC POWER SUPPLY. FARR RECOMMENDS THAT ALL HYDRAULIC
LINES ARE FULLY DISCONNECTED, AND RESIDUAL HYDRAULIC PRESSURE IS BLED OFF.
ENSURE ADEQUATE CONTAINMENT IS IN PLACE TO PREVENT ENVIRONMENTAL CONTAMI-
NATION FROM RESIDUAL HYDRAULIC FLUID.
2.
D
epressurize
h
yDrAulic
s
ystem
i
n
p
repArAtion
f
or
m
AintenAnce
:
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.
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 EQUIP-
MENT IS USED TO GUARD AGAINST PRESSURE INJURIES
M
aInTEnanCE