Repair and Maintenance of f...

Amount

Alignment of shaft sprocket assembly- Dismantling the chain sprocket shaft assembly with bearings and then holding the fish belly gate with hydraulic crane at site then send the complete shaft assembly to the workshop of contractor for replacement/refitting of Plummer block, bearings, single and triplex sprocket fitting by hydraulic press and dispatch the same at power house. Installation of the shaft sprocket assembly , single chain and triplex chains with side links and balancing of counter weight with respect to alignment of fish belly gate to operate automatically by chain sprocket shaft complete in all respect

Dismantling of SS pin of triplex chain/single chain by holding the gate with hydraulic movable cranes and holding the gate with girders and chain block fixtures and removing the triplex chain/Single chain with links and supply & installation of new SS pin by repairing and welding of gate structure etc & installation of New SS pin

Alignment by Repair of fish belly gate along with overhauling of chain (cleaning, greashing of chain & sprocket and aligment of chain & sprocket and rollers to work and operate smoothly

Supply, Dismantling, Replacement of Rubber seal wedge bottom type as per existing size including galvanized nuts & Bolts complete in all respect for fish belly gate

Supply, Dismantling, Replacement of side rubber seal bulb type as per existing size including galvanized nuts &Bolts complete in all respect for fish belly gate

Overhauling of gate valve to make it operate smoothly and replacement of spindle of gate valve for fish belly gate

Dismantling, supply, replacement, installation and alignment of hinge brackets-8 No. and SS pin as per existing sizes confirming IS:2062 and SS-304 material for fish belly gate

Cleaning, scraping & painting of gate with Epoxy black CA-50 paint having two coats complete in all respect for fish belly gate

Supply, fabrication and installation of MS fabricated link for triplex chain as per existing size (MS long link)

Supply, fabrication and installation with proper alignment of MS bottom cylinder pipe OD 208*8200 mm long or as per existing size

Dismantling of damaged holding/lifting bracket, fastener etc. of counterweight for fish belly gate

Fabrication & installation of new holding brackets as per sample for fish belly gate

Providing of new fasterners of holding bracket for fish belly gate

Dismantling, providing and fixing of 40 mm 03 nos. pin of chain by cutting of pin and provide of new pin by proper fitting and testing Material:- carbon alloy EN8

Dismantling providing and fixing of 25 mm 02 nos. pin of chain by cutting of pin and provide of new pin by proper fitting and testing Material:- carbon alloy EN8

Dismantling/Replacement/Fabrication of damaged lifting arm of single chain as per existing size(steel EN8)

Lubrication of chains- Dismantling of chain remove all the rust area by diesel and then greasing, oiling so that chain work smoothly after that re- assemblling by proper fitting testing at site

Holding of fish belly gate by chain block/sling for proper fitting of chain and its parts

Re-assembling of all the damage parts like nut, bolts, holding bracket, fasterner by welding, grouting etc.

Repair of damaged rib plates & bottom hinges of fish belly gate as per scope of work detail below:- • Lifting of fish belly gate stucked and hanging between bypass channel walls using chain blocks & hydraulic movable cranes. • Holding the gate in position using sling ropes, Chain blocks & hydraulic movable cranes. • Cutting of all rib plate bushes of fish belly gate. • Re welding & strengthening of rib plates and bushes of fish belly gate. • Repair of bottom cylinder of fish belly gate. • Alignment of all hinges, bushes and brackets of fish belly gate. • Refixing of gate to the desired position using chain pulley blocks & hydraulic movable cranes. • Dismantling, Fabrication & refixing of damaged parts of fish belly gate such as MS Link of Triplex Chain, brackets etc. • Alignment of gate to the desired position along with alignment to chains & sprockets chain pulley blocks & hydraulic movable cranes.

Repair of fish belly gate as per scope of work detail below:- • Lowering of stop log gates using hydraulic movable cranes for reducing water pressure on fish belly gate. • Removal of single & triplex chains from sprockets and placing the chains properly using sling ropes. • Dismantling of damaged MS long link of triplex chain. • Fabrication & installation of MS long link of triplex chain as per existing size. • Dismantling, fabrication & installation of lifting arm of single chain. • Removal of damaged single chain from counterweight pit, repair of chain using SS pins & rollers by dismantling of damaged links and by providing new links as per existing size. • Dismantling of chain sprocket shaft assembly with bearings and then holding the fish belly gate with hydraulic cranes, chain blocks & sling ropes at site, sending the complete shaft to workshop for re-fixing of loosened bearings, single & triplex sprockets fitting by hydraulic press and dispatching the same to site. Installation of shaft sprocket assembly, single chains & triplex chain with side links and balancing the counterweight with respect to alignment of fish belly gate to operate smoothly. • Repair of single sprocket using welding, cutting & grinding to required pitch using milling machine. • Providing & fixing channel separator in between triplex chain to prevent chain from interlocking. • Dismantling, providing & fixing of 40 mm 03 nos. SS pins of single chains by cutting of damaged pins & replacing with new pin by proper fitting & locking at site. • Providing & fixing of guide rollers on both sides of single chains. • Cleaning of all 03 no. chains using diesel & then greasing, oiling for smooth operation at site. • Removal of stop log gates using hydraulic movable cranes

Lifting, repair, fabrication and installation works of fish belly gate as per scope of work detail below:- • Lifting of fish belly gate hanging from triplex chain on side of by-pass channel using hydraulic movable cranes. • Dismantling of damaged triplex chain MS long link connecting the triplex chain& fish belly gate. • Removal of fish belly gate from the by-pass channel using hydraulic movable crane. • Placing of fish belly gate outside the canal for making suitable arrangement (fixing gate on 12 m girder section) for repositioning the gate to its actual position. • Lifting of gate using hydraulic movable cranes & lowering it to its actual position using chain blocks etc. • Holding the gate in position using sling ropes, chain blocks & hydraulic movable cranes. • Fabrication & installation of new triplex chain link. • Dismantling of damaged rib plates, hinge brackets & SS pins. • Cutting of damaged flanges of bottom hinge girder • Welding & strengthening of damaged bottom hinge girder by using suitable MS plate as per site requirement. • Supply & fixing of bottom hinges as per site requirement. • Rewinding & strengthening of damaged rib plates and bushes of fish belly gate. • Repair of bottom cylinder of fish belly gate. • Alignment of all hinges, bushes, and brackets of fish belly gate. • Refixing of gate to the desired position using chain pulley block & hydraulic movable cranes. • Repair of sprockets for smooth movement of single & triplex chains. • Setting right & adjustment of single chains using turn buckle for proper leveling of counterweight. • Alignment of gate to the desired position along with alignment to chains& sprockets chain pulley blocks & hydraulic movable cranes for smooth operation.

Installation of triplex chain, single chains, triplex sprocket & single sprockets of fish belly gate at WYC HE Project, Bhudkalan • Lowering of stop log gates using hydraulic movable cranes for reducing water pressure on fish belly gate. • Holding of fish belly gate using chain blocks, hydraulic movable cranes and sling ropes. • Dismantling of guide rollers of single chains. • Removal of single & triplex chains from sprockets and placing the chains properly using sling ropes. • Dismantling of Plummer blocks for removal of shaft assembly. • Dismantling of shaft assembly from platform using hydraulic movable cranes. • Lifting and transportation of shaft assembly to workshop. • Dismantling of damaged 1 no. triplex and 2 no. single sprockets from shaft assembly using hydraulic press fit machine. • Cutting of keys in triplex sprocket & single sprockets by making modification in the id of sprockets using suitable cutting machine (milling) as per existing arrangement on shaft assembly. • Installation of new 1 no. triplex and 2 no. single sprockets on shaft assembly using hydraulic press fit machine. • Lifting and transporting shaft sprocket assembly back to site. • Placing shaft sprocket assembly in position on platform using hydraulic movable cranes. • Re-fixing of shaft sprocket assembly fixing Plummer blocks. • Installation of new single & triplex chains on single & triplex sprockets. • Alignment of fish belly gate with respect to counter weight, single & triplex chains using hydraulic movable cranes and chain blocks for its smooth operation. • Removal of stop log gates using hydraulic movable cranes.

MAHADEV ASSOCIATES (BID ID -1226813)

Om Kumar Contractor (BID ID -1225456)