Farr 80-0420-16, Technical Manual

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KT5500 5-
1
/
2
” T
ong
& CLInCHER® B
aCKup
S
ECTIon
C
onTEnTS
3.23
T
ECHnICaL
M
anuaL
M
aInTEnanCE
J. MONTHLY MAINTENANCE CHECKLIST - POWER TONG
The following maintenance checklist is intended as a guideline rather than a definitive maintenance schedule. Your equipment may
require more, or less, maintenance depending upon the frequency of use, the percentage of maximum torque that your equipment is
routinely subjected to, and the field conditions under which your equipment operates. Farr recommends that the following inspection
and maintenance procedures be performed monthly, or in conjunction with your maintenance foreman’s experience and best estimate
of when your equipment is due for this maintenance.
1.
Rotate cage plate/rotary gear until the opening in the rotary gear faces towards the rear of the tong.
3.
Clean the exterior of the tool thoroughly, using either water (if using a pressure washer ensure a low-pressure wash wand
is used), or an appropriate solvent-based grease-cutting cleaner such as Varsol. Ensure adequate containment is in place
to prevent environmental contamination from residual hydraulic fluid, dirty grease, and cleaning agents.
4.
Remove the access panel on the side of the tong directly adjacent to the shifter mechanism.
5.
Clean the interior of the tong thoroughly, using either water (do not use a pressure washer), or an appropriate solvent-
based grease-cutting cleaner such as Varsol. Ensure adequate containment is in place to prevent environmental con-
tamination from residual hydraulic fluid, dirty grease, and cleaning agents. Make a note if any metal shavings or metal
pieces are flushed out of the gear train cavity - if shavings or metal pieces are seen the tong must be overhauled before
it is returned to service.
6.
Inspect all fasteners and fastener safety wires (if equipped). Replace any missing fasteners - use Grade 8 bolts only un-
less otherwise specified. Re-torque all external fasteners to SAE specifications.
7. Repair or replace any damaged or missing external body parts, such as torque gauge mounts, hydraulic supports, safety
door protectors, etc.
8.
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.
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 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 - “McCoy Grey” is paint color number RAL7015 (contact Farr sales for paint number for custom paint applica-
tions). Allow sufficient time for paint to dry before proceeding.
11.
Inspect all external welds. Any weld that is cracked or separating must be repaired and repainted before returning the
tong to service.
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