CRANE TROUBLESHOOT IN ZANZIBAR

INTRO

Alatas Turkey technicians have initiated crane testing procedures following their arrival at the vessel. Their comprehensive inspection encompassed a thorough examination of all sensors, pressure switches, and the electrical motor. Upon identifying the damages, the technicians swiftly began the repair process. This involved bypassing the pressure switch, removing the electrical motor for necessary refurbishments, executing assembly work, conducting rigorous testing, and providing valuable recommendations.

 BACKGROUND

The technicians of Alatas Turkey were commissioned to troubleshoot the Crane.

 ALATAS’ SOLUTION

To address issues with the crane, the technicians traveled to Zanzibar and promptly tended to the vessel. They examined the crane, identifying any malfunctions, and subsequently carried out the necessary repairs in response to these issues.

 JOB SCOPE

Alatas Turkey’s technicians embarked on a journey to Zanzibar, where they promptly addressed issues on the vessel.

Their troubleshooting process began with a meticulous examination of the crane to identify any potential damage. During this inspection, the technicians noted an alarm on the PLC indicating a problem with luffing pressure, specifically code 2010 (Luffing pressure < 7 bar). Thorough scrutiny of sensors and pressure switches, however, revealed no issues. To address the luffing pressure switch concern, the technicians temporarily bypassed it, resulting in the appearance of another alarm, code 1010 (Hoisting pressure < bar) on the PLC.

With expertise, the technicians resolved the 1010 alarm by bypassing it using an EOS code and subsequently conducting further tests. This time, their attention turned to the slewing pressure switch, which triggered an alarm. Upon dismantling the electrical motor, they discovered damage to the coupling connecting the motor and pump.

Upon replacing the damaged coupling with a new one, they retested crane no. 1, and the pressure alarm was no longer present. Consequently, Alatas Turkey technicians recommended procuring spare couplings.

During subsequent testing, an alarm code 0220 (Overload feed oil pump) emerged on the PLC, accompanied by the discovery of a damaged F13 component. However, the electrical motor checked out fine, except for the electrical connection condition, which prompted a recommendation to replace it with a new one.

The technicians opted to install a spare PLC and discovered a socket mismatch issue. After addressing this by adjusting the socket lock and retesting the crane, they found no further problems. Therefore, they recommended obtaining a lock for crane no. 2’s socket.

Due to a lack of spares on the vessel, Alatas Turkey technicians ingeniously mounted crane no. 2’s PLC onto crane no. 1.

Further testing of crane no. 1 revealed an alarm with code 2312 (Luffing must run into reference pos.). The technicians reconfigured the PLC settings and fine-tuned the limit switches, resulting in the successful resolution of this issue.

Notably, Alatas Turkey technicians also identified damage to some of the socket connection points in crane no. 2, and they raised concerns about the rusty and deteriorating condition of the boom steel. Consequently, they recommended conducting a thickness test for further assessment and maintenance.

CRANE TROUBLESHOOT IN ZANZIBAR

Renewal of the PLC