Farr HD8625, Техническое руководство

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3.22
hD8625 8-
5
/
8
” 35K T
ong
T
echnical
M
anual
M
ainTenance
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 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.
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.
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 CONNECT-
ED 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 CONTAMINATION 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.
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