HOIST GEARBOX EXCHANGE OF CRANE NO. 2 AND 3

bACKGROUND

Alatas Germany was requested to connect the hoisting rope to the winch drum.

Alatas personnel utilized wire ropes and a hook (grab) to test drive.

Drain Hydraulic oil from the whole system into clean drums for reuse after gearbox exchange
Disconnect pipes, hoses, motor, and electrical cables from the power pack
Remove the complete power pack and shift it close to slewing gear
Removal of Limit switch-box
Removal of access ladder to the cabin floor
Connect lifting gear on the drum and start loosening the bolts from the foundation and gearbox
Removal of Counter bearing flange
Removal of Drum with the gearbox from the frame and drain the oil out inside the drum
Loosen the bolts of the gearbox and remove the gearbox out of the drum
Clean Surface and install a new gearbox
Tight the bolts of the new gearbox
Install new counter bearing flange
Install it back into the frame
Install the access ladder and the limit switch-box
Install hoisting motor with new bearing and seal
Install the power pack back in position and connect all hoses, pipes, and electrical wires
Fill in gear oil
Fill back the drained hydraulic oil
Start the crane and remove the air from the hydraulic system
Test drive hoisting without ropes
Install hoisting wire rope and connect it to the drum
Test drive with wire ropes and hook (grab)