| Alatas Service | Field Service |
| Location | Singapore Anchorage |
| Equipment Type | Bulker w/ Deck Cranes and Grabs |
| Equipment Manufacturer | MacGregor |
| Equipment Model | GLB 3530-2/2830gr |
Our Singapore team carried out boom hinge repair on a MacGregor deck crane aboard a bulker vessel.
Crane 2 on the bulker vessel had developed damage on the jib foot bearing assembly. The spherical bearing had worn out due to a lack of grease and it had seized on the pin and caused wear in the bearing housing. The boom hinge pin had rotated in the boreholes and the seat at the jib hinge outer plate was entirely worn out and in an oval shape.
Alatas Singapore specialist afloat repair team attended with tools and in-situ machine to carry the repairs. Our team then welded up the worn seat of the boom hinge pin and then installed a line boring machine to allow in-situ machining. The work carried out by our engineers corrected the inner diameter, and all tolerances were restored to original values.
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Boom Hinge Repair on MacGregor Deck Crane
Erection of the scaffolding at boom hinge area Left side jib hinge damage outer plate Build up left side damage jib hinge outer plate by welding. Boring completed Polishing the damage area Polished the damage area Install new bearing Assembled bearing housing assembly and torque the mounting bolts using torque 235 Nm. Installing pin Torquing of pin locking plate bolts Install boom hinge mounting bolts and torque the mounting bolts using torque multiplier (60.75 Nm by torque wrench x 26 by the multiplier = 1580 Nm). Test crane #2 with empty grab as load, and no abnormal sound was observed.
