Farr HD8625, Техническое руководство

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T
echnical
M
anual
hD8625 8-
5
/
8
” 35K T
ong
3.25
M
ainTenance
12.
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 2A of the technical manual
(Sling/Load Bearing Device Safety) for information on recommended testing and recertification. Please note that turnbuckles
with part number 101-3086 (short turnbuckles) use a high-strength pin which must be supplied by Farr.
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.
23.
Ensure that supply pressure is at or above the tong’s specified operating pressure, and that the return pressure is less than
350 psi.
24. Perform a visual inspection of pressurized hydraulic lines. If any hydraulic fittings or hoses are leaking they must be repaired
or replaced before proceeding.
25.
Rotate tong for one minute in both high and low gear. Stop the tong and reverse the direction of rotation for another minute
in both high and low gear, ending with the opening 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.
FAILURE TO ENSURE THAT THE SELF-SEALING SUPPLY AND RETURN LINES ARE FULLY MADE
UP MAY RESULT IN CATASTROPHIC EQUIPMENT FAILURE.
“SHORT” TURNBUCKLES HAVING PART NUMBER 101-3086 EMPLOY HIGH-STRENGTH PINS
WHICH MUST BE SUPPLIED BY FARR.
13.
Remove hydraulic motor and rotate the gear train by hand, and use a flashlight to perform a visual inspection of the gear
train through the access panel and the opening of the rotary gear while the gear train is being rotated. 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.
14.
Inspect all jaws and dies in use for the maintenance interval. Remove pin & roller, and inspect for signs of damage - replace
pins if necessary. If the pins are welded in place & the welds are found to be damaged, remove and quarantine the jaw until
the weld is repaired. Clean the pins and rollers, and reassemble using a liberal coating of anti-seize compound. Ensure dies
are secure in the jaw & die retainers are present. Replace worn dies if necessary. Ensure that the jaw rollers rotate freely.
15.
Inspect backing pin(s). If cracked, broken, or bent it (they) must be replaced.
16.
Inspect top and bottom brake band linings - replace if lining is found to be flaking or is missing pieces of material. 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.
17.
Inspect door springs. Ensure the springs retain sufficient strength to be able to assist the opening of the door, and to keep
the door open. The springs should also help to “snap” the door shut.
18.
Inspect backup springs (if applicable). The rear extension springs (where used) should be equally extended, and the front
leg springs should be equally compressed. Ensure that neither of the rear backup springs have been over-extended and
lack sufficient tension to adequately support the backup. Ensure that neither of the front leg springs (or, when installed, the
single rear backup leg spring) have been over-compressed, and still retain enough spring strength to support the front of
the backup.
19.
Extend all hydraulic cylinders, and inspect cylinder rods for signs of mechanical damage, flaking, or rust. Farr recommends
that damaged cylinders be replaced prior to storage.
20.
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.
21. Generously fill the gear train housing with grease through the access panel, and also through the opening in the rotary gear.
Perform a full lubrication - refer to Maintenance section of manual to determine lubrication points.
22.
Ensure main supply and return connections to the tong are fully made up. Re-connect the remainder of the hydraulic lines.