LOAD TEST :
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1
EOT Cranes
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2
JIB Cranes
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3
Crawlers & Tyre Mounted Cranes
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4
Forklifts
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5
Lifts (Manlift, Goods & Passenger)
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6
Other Lifting Equipment
ENSURING EOT CRANE SAFETY AND EFFICIENCY:
TOP-NOTCH SERVICE AND MAINTENANCE
The safe and effective operation of EOT cranes is dependent heavily on the routine maintenance and inspection of these machinery. To assure that the crane works at its peak performance , this should be subjected to regular cleaning, checking and other technical whereabouts.
The basics of EOT cranes routine maintenance includes tightening loose connections, checking the electrical components, lubricating all the moving parts, and also checking for any for wear and tear. Whenever this routine is in process, it is possible to find and fix any possible problems or flaws. The structural integrity, safety features, electrical systems, and control mechanisms of the crane – everything should be properly examined.
JOB SPECIFICATION :
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1
Safety switch - Corner safety switches, Operator call switch for boarding on crane, Lighting switches, main & control switches, main & aux. trolley, safety switches, Individual Hoist safety switches and emergency switches,
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2
Limit switch and its accessories - Over Hoist rotary & CWT limit switch, Lower limit switch, LT & CT track limit switch
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3
Isolating switch - Free operation, Fixing of cover, Condition of handle, Cable condition & connection.
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4
E-Room Panel Nomenclature, Missing parts and components not in service, condition of Arc chutes, checking of O/L relay and its operation, Checking of UV and NV relay and its operation, Condition of knife switches and jaws, Foundation base & rigidity, Door Sealing, Cable entry hole sealing
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5
Indicating Lamp - Condition of lamp, Glowing or not.
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6
Master controller /Pendent PB station - Controller nomenclature, Handle direction are as per norms, controller rigidity and cable connection tightness, Controller cover seal and latch, OFF position interlock and inside parts (spring, moving contract etc, Contract tips wear, alignment and wipe. Pendent Push buttons, Pendent cables, PB station Earthing, Pendent sling
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7
Resistance box - Resistance Rigidity, cables connection tightness and cable socketing, any grid faces are burning or hot, any gird got broken and any gird is not in service, condition of tie rod mica insulation.
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8
Motor - Carbon condition, its free movement, pigtails and brush holders, condition of commutator and binding chord, Bearing and housing, inspection cover and terminal cover, Foundation bolts and body bolts, inside cleanliness and any burning smell, connection and cables condition (Inside and outside, body temperature.
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9
Brake - Brake shoes opening and closing, Condition of brake shoe, its fixing and liner wear, foundation bolts, condition of tie rod and its fitting. Condition of hinge pins and its locking and lubrication, Connecting leads and its tightness, hotness of pulley, coil and leads, brake pulley condition and its fittings, air gap of armature.
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10
Collector - Wear out, hinge system, sockets & connection, shunts, connecting cable condition & clamping
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11
Cross bar / Bewa system - Cross bar straightness, cross bar fixing arrangement, I-beam fixing, welding leveling, alignment & rigidity, I-beam holding C post rigidity, bewa carriers, rollers & brackets bolts locking, Bewa cables, Bewa cables tens ion protection chain.
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12
Main power rail - Rail straightness, rail supporting structure, rail insulators & their fixing arrangement, rail joints
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13
Lighting & wiring - Condition of cables, glowing of lights
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14
Earthing - Condition of Earthing Patti/wire/cables
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15
Magnet and drum - Magnet body bolts, magnet eye bolt, magnet chain, magnet chain holding arrangement, magnet cable and socket condition, magnet reeling drum
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16
Hoist rope & Rope fastening - General condition of ropes, ropes diameter & wire breakage, rope deformation and core damage, corrosion & oxidation, rope lubrication, rope dead end splicing and thimble, bull dog clamps, rope clamps on drum, equalizer pin and locking, rope rubbing or touching with any structural part, whether rope come out form drum or sheaves grooves
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17
Rope drum - General condition of drum and welding, wear of drum grooves and sharp edge on the crest, tightness of drum on the shaft, drum malmedie coupling, its pointer, screws and bolts.
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18
Sheaves and its accessories - Running condition of sheaves, sheaves bearing lubrication, sheaves groove, sheave pins condition and locking, sheave flange condition.
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19
Hook / Beam and its accessories - Free rotation of hook, hook block sheaves & ladle beam sheaves, free movement of cross piece pin & lade hook, Hook nut tightness, nut locking, sheave pin, ladle hook pin & cross pin locking, Lubrication at all places, Hook & ladle hook wear at load point & opening at the bend as per discard criteria, twist of hook & wear of pins, sheaves groove & flange wear as per discard criteria, Ladle hook wear, hook pin & cross pin locking, guard to prevent rope falling, ladle beam structures & equalizer and its locking on ladle beam, wrong assembly if any , Abnormal sound if any during operation. Crack or any physical /external damage of hook, ladle, hook block & ladle beam.
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20
Hoist shaft and its accessories - Condition of shaft (bend, eccentricity, crack), Condition of bearing & foundation base, Condition of coupling (Malmedie, coupling, optional plaly, inclined, tightness on shaft), Vibration, lubrication.
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21
Hoist gear and its accessories Foundation bolts, joint bolts, Boss bolts, oil leakage, Drainout value, condition of bearings and its end plates, bearing seating, Lubrication, vibration, sound.
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22
Travel Gear box fdn bolts, Boss bolt, joint bolts, oil leakage, Floating shaft, long shaft, couplings
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23
Trolley Gear box fdn bolts, Boss bolt, joint bolts, oil leakage, Floating shaft, long shaft, couplings
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24
Operator cabin Suspension bolt, welding of plates and angles, glass panes, gong bell, communication system, cabin structures and its condition, operator chair
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25
Wheel and its accessories Wheel collars, wheel treads, wheel dia, tightness of wheel on axle, wheel coupling, wheel bearing / axle brass, axle box fixing bolts, axle box stopper, lubrication of bearing /axle brass, wheel bogie structure and bogie pin condition.
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26
Structures - Girder and end carriage/ end tie connecting bolt, girder joint rivets and bolts, gap at joints, any deformation plates, welding of top plate and web plate and welding of girder structure and end carriage structure, yoke pin locking and yoke structure, saddle fixing bolts and its stopper, for lattice girder Bracing angles and chord angle condition and their connecting rivet /bolts condition of bracing angle gussets plate and its fixing bolts and rivets. Condition of diaphragm plate and its welding with web plate.
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27
Track rail Rail wear, Crack, Straightness, joint gap, rail clips, locking.
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28
Lubrication level, Color, Oil gauge, grease nipple
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29
Cleanliness Dust accumulation, oil leakage
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30
Fire extinguisher Proper location, Expiry date
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31
Limit switch trial register - Regular entries after trial
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32
Safety point Temporary wiring, fixing of girder lights & fall protection, cleanliness, caution board, Earthing, crane approach platform fixing, ladders, hand railings, toe guard, checker plate, buffer blocks, stop blocks, power rail guard, crane plague (name plate), Gong bell & its chain, Red/Green pilot lamps, display of dos & don#t for operator in operator cabin, LT movement buzzer and flasher light, anti-collision system. The record should be kept by the vendors.
CRANE UPGRADATION
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Complete study of existing crane bay structure the crane bridge structure the ct trolley structure etc for evaluation of different loading on upgrading the existing crane bridge to 10 mt from 5 mt
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Calculate the existing structure load carrying capacity for both crane and the bay structure all together for vertical load horizontal lateral loads horizontal longitudinal loads impact loads service ability fatigue limits.
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Consider the increase in dead weight on the crane for upgradation.
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Provide the detailed report of the different loading on upgradation and for existing structure with comparison.
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Suggest the method and provide the detailed drawing of the members for strengthening of crane bridges or gantry girder or bay trusses necessary to upgrade the crane from 5mt to 10 mt on the same bridge and ct trolley.
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Provide the wheel loading data of the crane in existing and on upgradation also to suggest the required wheel size for the same required for upgradation.
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Measure the existing bridge deflection of the crane and calculate the deflection on increasing the capacity to 10 mt.
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Drawing for strengthening of each member has to be provided in soft form hard copy and in auto cad.
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Report and drawings has to be approved by charter engineer authorised by Jharkhand / or government of India.
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We have gearbox and ct trolley vendor has to access weather it could be fitted over the same EOT crane bridge after strengthening of girder bay structure stresses etc.
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Developing modification drawing of CT trolley that we are planning to put if feasibility study permit.
