Farr HD8625, Technical Manual

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T
echnical
M
anual
hD8625 8-
5
/
8
” 35K T
ong
3.31
M
ainTenance
M. TUBULAR CONNECTION EQUIPMENT RE-COMMISSIONING PROCEDURE
Perform the following recommissioning procedures when removing tubular connection equipment from short or long-term storage back into
regular service. These procedures are essential for ensuring proper equipment preparation and operation. The following procedures also
assume that the decommissioning and storage procedures recommended by Farr have been strictly observed.
7.
Energize power unit.
8.
Ensure that supply pressure is at or above the tong’s specified operating pressure, and that the return pressure is less than
350 psi.
9.
Perform a thorough inspection of pressurized hydraulic lines and fittings. Any leaking hydraulic fluid lines or fittings must be
replaced before the equipment is returned to service.
10.
Perform a thorough inspection of all seals. Any seal that is leaking or “weeping” must be replaced before the equipment is
returned to service.
11.
Rotate tong in low gear for 5 minutes while monitoring pressurized seals and hydraulic lines. If a seal, line, or fitting begins to
leak while tong is rotating, it must be replaced before the equipment is returned to service. Finish this step with the rotary gear
opening facing the gear train. De-energize the power unit.
12.
Inspect all flexible hydraulic lines for signs of wear, blistering, or any other signs of potential failure - replace if signs of potential
failure are identified.
13.
Inspect the gear train housing. If the amount of grease is inadequate, liberally grease the gear train through the access panel,
and through the opening in the rotary gear.
14.
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. Ensure that all grease is wiped from brake band linings and the parts of the cage plates that come into contact
with the brake band linings
15.
Re-install access panel. Install a set of pre-inspected jaws that are the correct size for the pipe or casing being run.
16.
Install load cell. If using a tension load cell, perform a visual inspection and replace any cracked, broken, or distorted compo-
nents including links and chains. If using a compression load cell, replace any component that has been crushed or otherwise
distorted through compression.
17.
If applicable, inspect the load cell anchor pins (tension load cell only). Replace the anchor pins if cracking or metal distortion
is seen.
18.
If applicable, the weld securing the single load cell anchor to the bridge bar main plate must be inspected (compression load
cell only). If the integrity of the weld has been compromised, the tong must be removed from service until the weld is repaired.
The load cell beam will need to be disconnected and removed so the weld is visible. Before re-installing the beam, liberally
grease the anchor pin before reinserting into the load cell beam.
19.
Re-energize power unit.
FAILURE TO ENSURE THAT THE SELF-SEALING SUPPLY AND RETURN LINES ARE FULLY MADE
UP MAY RESULT IN CATASTROPHIC EQUIPMENT FAILURE.
1.
Remove all protective plastic wrapping. If there are desiccant packs with the assembly, they may be disposed of with the
regular garbage.
2.
Remove the access panel on the side of the tong directly adjacent to the shifter mechanism.
3.
Wipe excess grease or heavy oil from exposed cylinder rods.
4.
If applicable, re-connect chain sling to lifting lugs. 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. If your company requires yearly certification of lifting equipment, ensure that the most recent test date falls within the
past year. Perform recertification if necessary.
5.
Perform a liberal lubrication of the equipment - refer to Maintenance section of manual to determine lubrication points. Gener-
ously fill the gear train housing with grease through the access panel, and also through the opening in the rotary gear.
6. Connect the equipment to a hydraulic power unit. Ensure all lines are fully made up to prevent equipment damage from exces-
sive back pressure. Do not neglect to connect the motor drain.