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Complete Overhaul of 4 pcs SMAG-Peiner Grabs by ALATAS Singapore

 

All four Peiner Motor Grabs, type MZGL 14000-6-B-S had very high operating hours and were fatigued. Cracks in the steel structure, worn-out scoop hinges & hinge bolts, worn down cutting lips on the grab bucket , leaking cylinders et. started to show.

The owner had planned to refurbish the Grabs at a Singapore Ship Yard during the vessel dry-docking and the Yard had started to dismantle the Grabs for overhaul, but the yard got behind schedule. ALATAS was asked to take over, remove the grab from the yard and complete the repair of 4 Nos. of grabs in ALATAS workshop on a top urgent basis, as the vessel was to sail. The time frame was 6 days only, but utilizing all resources and working day and night on a 24/7 basis, ALATAS Singapore managed to complete the repairs in time.

 

 

       

Condition of all grabs after sand blast and paint work in shipyard

Condition of all grabs after sand blast and paint work in shipyard

4 set of Grabs Aggregate

All pins for grabs are found badly worn and were replaced with new ones supplied by owner.
       

Holes are Elongated

Holes are Elongated

Fill up the materials on the pivot pin areas

Welding and machining works carried out on elongated holes.

       
MPI Testing carried out
New Bushings installed
Reinforcement plates were Supplied by owner
Crack area found on external area of scoops
       
Cut out for installation of reinforcement plate
Installation of reinforcement plate and carried out welding works and grind to smooth area.
MPI Test carried out
Stiffener plates found cracked
       
Cut out of stiffener plates
After removal of stiffener plate
Installation of new stiffener plate

Stiffener plate MPI Test

       
Crack area found on external area of scoops

Gouging works carried out to prepare for welding.

After welding, grind out to smoothen surface area and MPI test conducted.

Hole was drilled to check for any further cracks.
       
Removal of hydraulic cylinder from grab.
Pressure test (extraction) was conducted upon overhauling of cylinder.
Pressure test (retraction) was conducted upon overhauling of cylinder.
Pressure test (retraction) was conducted upon overhauling of cylinder.
       

CylinderAfter Overhauled

Install After Overhauling

Mount back the Traverse with Steering arms on the buckets

New pin  and new bush  For scoop supplied by owner
       

MPI test conducted on all 16 steering arm pins and fund in good condition.

Transportation of grabs from workshop to shipyard.
Preparation to lift up grabs from low bed trailer to on-board vessel.
All 4 grabs were function tested with Superintendent.
       
       

 

 

 
 
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