COMPREHENSIVE MAINTENANCE AND REPAIRS OF EOT CRANES MAKE DINESH ENTERPRISES INSTALLED AT HANGER BLDG INSIDE TECHNICAL AREA OF NPOL KOCHI

Amount

Comprehensive maintenance consisting of Repair, Maintenance and servicing including replacement of spares for electrically operated overhead travelling EOT cranes, single/double girded, gear type with electric motor for long travel, cross travel, hoisted creap, control panels, protective panels, gear box, gantry rail, main switches, resistance coil, wire ropes, rope drum, brake control, cable and switches, Servicing Break drum cleaning, all electrical connection checking & connecting. Lubricating of all moving parts, cleaning of DSL, proper alignment of cable trolley, festoon cable system & applying one coat spray painting with synthetic enamelled paint of approved quality with and including E/M & MES Srl No. making neatly on each machine complete with connected accessories and components of 03 Ton Capacity of EOT Cranes etc. Double Girder, with span of 16 mtrs (approx), height of lift 6 mtrs (approx), travel length 80 mtrs (approx), , Make:-Dinesh enterprises - 01 No in Hanger.

Notes for Items No:1.00 - (a) The items also includes the cost of grease, oil for oiling the parts, oil seal any type, nut bolts &washers, soldering & welding works, cleaning of LT control panel board by hot blower, The other major parts replaced shall be measured and paid separately .b) The contractor shall be maintain maintenance register of each crane as per the direction of the Engineer-in -Charge. (c) Check to make sure all bolts are tight and lock washers are compressed, (d) If required touch up the crane with existing paint wherever necessary, (e) Check clevis pin, cotter pin, (cotter pin should be fully wrapped around clevis pin) and check clevis bolt and hard wares, (f) Check for cracks, puts, and / or grooves of wheels, If any of this conditions exist, wheels should be replaced, (g) Ensure correct position on bridge to match specified cantilevers, (h) All safety features shall be check properly including checking of HRC fuses or MCBs or MCCBs, O/L Relays, single phase preventers, under voltage protection, main incommer circuit breaker/ contactors, Limit switches, brake, clutches & other switch gears & control equipments, (k) One experienced supervisor who is throughly conversant with crane operation shall be deputed while works on progress. (I) Tools for the repairs and safety of the mechanic/ engineer shall be at contractor’s risk. (m) The spare parts mentioned in srl no of the item shall be measured and paid separately under item no 3.01 to 3.28. Quoted rates also includes taking down of all items/parts listed below..

Description all as per the serial item 1.00 but for here-in-before EOT crane of Capacity 10 Ton ,Double Girder, with span of 16 mtrs (approx), height of lift 6 mtrs (approx), travel length 80 mtrs (approx), Make: Dinesh enterprises - 01 No at Hanger bldg .

Load testing of EOT Cranes of capacity 10 Ton installed at Hanger as per item nos 2.00 above, by by hiring load (RCC cubes ) 10 Ton capacity in 3 Stages (50% , 75 % and 100% ) including suitable transport, cranes and safety measures required for loading and unloading weight and submitting the test report in specific forms duly signed by testing authority all as specified and directed by Engineer-in-charge.

Load testing of EOT Cranes of capacity 3 Ton installed at Hanger as per item nos 1.00 above, by hiring load (RCC cubes ) 05 Ton capacity in 3 Stages (50% , 75 % and 100% ) including suitable transport, cranes and safety measures required for loading and unloading weight and submitting the test report in specific forms duly signed by testing authority all as specified and directed by Engineer-in-charge.

Note for Item No 1 .00 & 2 .00 :- The item includes inspection of the following sub systems and submitting report along with load test certificate duly load tested and signed by Govt authorised/approved Engineer. Any defects noticed by the Govt approved, authorised Engineer shall be rectified by the contractor and retest shall be carriied out at his own cost. (A) LT DRIVE SYSTEM :- (a) Inspection for wear and tear of gears, drive shaft coupling, plummer block and break lininer, greasing, oiling, etc.(b) Checking og Girders and Carriage, coupling bolt, foundation bolt of gear box and motor, (c) Checking of DSL System including carbon brushes, brush holder insulators and tightness of copper conductors, (d) Checking and serviceability of electric motors, power contactors, relays, limit swich, push buttons and electrical circuit cables and wiring. (B) CT DRIVE SYSTEM :- (a) Inspect wear and tear of gears, drive shaft, coupling plummer block and brake liner etc. (b) Checking of tightness of rail clamp bolts, alignment of rail joint, (c) inspection of cross travell conductor cable for motor, power conductors, relays, limit switch, push button etc. (C)HOIST :- (a) Inspect wear/ tear of wire rope, Hook block and break lines etc. and testing of rope, (b) Checking of electrical circuit limit switch and wiring (D) LOAD FOR LOAD TESTING :- (a) Contractor shall arrange necessary load as per the site requirement of the crane including shifting of load to the site by using crane, truck, labour, etc, (b) Contractor shall take care of the floor while shifting/ lifting the load and if any damage found at site shall be rectified with in 24 Hrs, (c) Load test shall not be more than 110% of the rated load. , (d) Contractor shall shift the load to inside the bulding for load testing of crane carefully by using crane/truck/fork lift/ labour without damage to the existing infrastructure, (e) Load testing shall be carry out as per ISO:4310 of 1981 and IS:14470 of 1997 with latest amendments on the IS . (E)TEST REPORT:- (a) On completion of the load test, a test report shall be prepared listing the conclusions and finding of the test for each crane, The report shall identify the crane tested, shall give the date and location of the tests, name of the Engineer tested, details of load, positions, configurations and findings if any in each case. (b) T&P for the load test and safety of the mechanic/ Engineer shall be at contractor's risk.

Supply & fixing in replacement of following spares/components of the unserviceable EOT cranes of 03 Ton/10 Ton capacity as directed.

Limit switch for LT/CT Make Speed-O-control

Limit switch for Hoist Make Speed-O-control

Brake lining 6mm

Brake Pad

Brake Coil for 100mm &150mm dia

Hydraulic brake for Hoist

Variable Frequency drive (VFD) For LT/ CT Motor Make - Yaskara/Mistubishi

Current collector for DSL

Cable trolley for DSL

Over Load Relay for CT/LT Make -Siemens/L&T

Over Load Relay for Hoist Make -Siemens/L&T

Control Transformer 440/24 Volts 200 VA

Brush holder assembly incl carbon brush

3 Pole Power contactor 25A L&T/ Havells

3 Pole Power contactor 16A L&T/ Havells

Magnetic Coil 100mm

Bearing for Motor up to 10HP Make SKF/TATA

Steel wire rope 12mm Make Usha Martin

Gear Oil C-320 Grade for LT/CT /Hoist

Transformer oil for brake thruster

Wire rope guardian compound

Multi speed radio remote control

Control Push button for NO/NC

LT PVC insulated and PVC sheathed copper conductor cable 2.5 sqmm 10 core for pendent

LT PVC insulated and PVC sheathed copper conductor control cable 2.5 sqmm 4 core

MCB TPN 415 V, 16 Amps , C curve Make Indoasian/ LT/Havells

Lubricant Grease (Superior quality) complete all as specified and directed.

MCB TPN 415 V, 32 Amps , C curve Make Indoasian/ LT/Havells

Note for item No 3.00 to 3.28 : (i) The spares/electrical items as listed above will be used whenever required only and it shall measured and paid separately under respective items. (ii) The rate is inclusive of all items as required at site except those items above and any major and overhauling works involved to keep the cranes operational round the clock including cleaning and greasing all moving parts on monthly basis complete all as specified and as directed by Engr-in-Charge. (iii) If spare parts of original make is not available in market necessary suitable spare equivalent to existing crane part as approved by Engr-in-charge shall be used in the work so that to run the crane with smooth functioning. (iv) The contractor should attend any complaint / breakdown immediately on call basis. (v) Contractor should submit the inspection / maintenance report of every visit inspite of no of visits during breakdown calls including mentioning the status of lift and spares any replaced. (vi) The old unserviceable spares replaced under comprehensive maintenance is the property of contractor.

Disconnecting and taking out the defective electric motor from the cranes, transporting to workshop for replacement of burnt out winding with existing gauge super enameled copper wire including insulating paper and varnishing and re-fixing motors to crane after testing, upto 3 HP motor complete all as directed

Disconnecting all the connections from motors including dismantling of main gear box assembly from the main hoist with the help of chain pulley block , stripping of complete gear box, taking out the damaged main shaft, Bevel shaft, spur gears, main gears, spacers, bushes and extracting the worn out bearing, oil seals from the gear box. Assembling the gear box assembly by replacing with new gear box shaft, Bevel shaft, spur gears, main gears, spacers, bushes and bearing and oil seals. Replacement of all the worn out nuts, bolts and washers and assembling the gear assembly with the main hoist by lifting with the help of chain pulley block. fitment of electric motor with the main gear box assly. Providing electric connection to the motors, alignment of the same. Testing and commissioning complete hoist on load complete all as specified and directed by Engineer-in-Charge.

MCCB 40Amps, 25KA ,4P ,with sheet metal enclosure complete all as specified and directed .

MCCB 25Amps, 25KA ,4P ,with sheet metal enclosure complete all as specified and directed .

M & L for Earthing complete with using galvanised steel earth plate 60 X 60 cm X 6 mm thick electrode , buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to 25 X 4 mm galvanised iron strip as earth lead by means bolts, nuts, check nuts and washers all as shown in electrical plate No.3 connected to earthing test point all as specified or indicated including testing on completion necessary complete all as specified and as directed.

Material & Labour for Earth continuity conductor fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 32 x 6 mm dia galvanised iron strip

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