The life boat davit, make Norsafe AS, type H-30, was malfunctioning, the hoist winch had seized. ALATAS Singapore was called in for urgent hydraulic troubleshooting and repairs. As it turned out, the hydraulic motor type AA2FM45 had seized, one of the pistons was stuck in the barrel.
The motor, complete with counter balance calve was brought to ALATAS sophisticated hydraulic workshop and re-build to a condition like new, using a new rotary group robbed from an ex-stock motor A2FM45. The motor was fully dynamically bench tested and re-delivered on board overnight and installed, along with the repaired counter balance valve.
The Life Boat Davit then was fully function tested and load tested using waterbags. Life boat launching & recovery operations were carried out successfully and the life boat davit was again certified operational.
Vessel at anchorage
Proceed to lifeboat davit and do troubleshooting.
Found out that not working hoist and lowering once command and pressure does not build up.
Remove and bring down the hydraulic motor with new block send to Alatas Singapore Pte Ltd work shop.
Open and inspect the hydraulic motor in Alatas Singapore work shop.
found damage the motor part the bore of the piston.
Found damage parts the piston of the motor.
Repair the hydraulic motor replaces damage parts. The testing the hydraulic motor with new valve block. Not working.
Do further troubleshooting and found that the new valve block that customer supplied see missing part shuttle valve.
New block can not be used due to missing part shuttle valve.
C/Engineer send the Old valve block to check and overhaul.
testing the hydraulic motor with the overhauled old valve block. Testing successfully done.
bring on board vessel the repaired hydraulic motor to install and fixed back.
IInstall the repaired motor & valve block, connected all fittings and hoses. OK
Do function testing check pressure
Load test on progress filling up the water bag.
Fill up water bag and as Master and C/Engineer only required for recovery test hoist up and down several times of actual load 5.770 Tones. All OK