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Read the case studyPumps · Naval
Mechanical recovery of Hydraulic Ballast Pump No. 01
Full mechanical recovery of a hydraulic ballast pump, covering shaft recovery, component replacement, anti-corrosion treatment, painting and bench testing.
Execution
The sequence applied to recover the equipment
The order below reproduces how the work was actually carried out, including the points where the condition found required a change of scope.
- Complete strip-down and inspection. The WF Service technical team began the work with the complete strip-down of Hydraulic Ballast Pump No. 01 and its components. Every item was then subjected to visual and dimensional inspection — shaft, bearings, seals, oil seals, fasteners, locking elements, contact surfaces and the remaining parts of the assembly — so that the mechanical condition could be assessed. Components showing wear or damage were identified during the inspection, and those not fit for reuse were replaced.
- Straightening and recovery of the shaft. The pump shaft was inspected and found to need recovery. Straightening and recovery were carried out, applying the procedures required to restore its dimensional and mechanical condition. Once the work was finished, the shaft was inspected again and prepared for reassembly.
- Supply and replacement of components. WF Service supplied and fitted 04 new special seals, model WJ 506.AHX.0500.BAR, made to measure; 02 oil seals 65 x 85 x 10 mm; 02 oil seals 50 x 65 x 10 mm; 02 bearings SKF 230.8E.CP/C3; 02 bearings SKF 233.09A/C3; spider-type locking elements; new bolts in place of the damaged ones; and the remaining items required for correct reassembly.
- Anti-corrosion treatment. Once the unit had been stripped down and the components recovered, the pump was given an anti-corrosion treatment, including preparation of the metal surfaces. The purpose of the procedure was to remove points of corrosion and to prepare the surfaces properly for the finish, giving the equipment greater protection and better conservation.
- Painting and finishing. After the anti-corrosion treatment, the ballast pump went through the painting and finishing process. The surfaces were properly prepared before the paint was applied, in order to provide protection against corrosive agents and better conservation conditions for the equipment. Once painted, the assembly was visually inspected to verify the condition of the finish.
- Reassembly and adjustment. With the recovery work completed and the components prepared, Hydraulic Ballast Pump No. 01 was fully reassembled. All the mechanical adjustments needed to ensure the correct positioning and operation of the components were carried out.
- Bench test. Hydraulic Ballast Pump No. 01 was bench tested at the WF Service workshop, simulating the operating conditions of the equipment so that its behaviour after the corrective maintenance could be assessed. Mechanical operation, the behaviour of the shaft, the operation of the bearings, the tightness of the sealing elements, the condition of the seals and oil seals, the presence of leaks, abnormal noise or vibration and the general operating condition were all verified. After the test the equipment was in proper working order and was approved.
Result
What the intervention delivered
The intervention delivered the complete mechanical recovery of Hydraulic Ballast Pump No. 01, with the shaft recovered, the compromised components replaced, anti-corrosion treatment, painting, reassembly and mechanical adjustment. On completion, the equipment was bench tested simulating the operating conditions, was found to be in proper working order and was approved in the test.
6
consecutive days on the job
04
made-to-measure special seals
Approved
in the bench test
Photographic record
Photographic record of the intervention
The sequence below shows the main stages in the recovery of Hydraulic Ballast Pump No. 01.
Ballast pump opened in place, top cover removed at the start of the strip-down
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