Our activities in the Dredging Industry

Inspection and repair on MAAG LGD-50 gearbox

The condition of the ball mill gearbox can be considered as good, no acute damage has been observed on the gears or in the bearings. On the electromotor indications for bearing damage have been observed. All additional checks were carried out successfully. Vibration measurement

No immediate signs of bearing damage have been observed. However without gear teeth numbers it is not possible to identify the origins of individual signals, making measurements less efficient. To make optimal use of vibration measurement technologies it is advised to obtain gear teeth numbers from the manufacturer.

Inspection and repair on NIIGATA MGN4022V gearbox

Inspection and repair on KESTERMAN SVO125-3-125-130-GL gearbox

- Disassembly, cleaning and inspection
- Renewing bearings, seals and various small materials
- Assembly and adjustment
- Test run with reporting
- Transport

Additional work following from inspection:
- Remove the gearbox from the outside, sand, degrease and conserve
- Remove the lantern piece and E-motor frame, sand, degrease and preserve in a DTM coating

Other revision work and deliveries
- Renew the oil pump (1 pcs)
- Refresh filters (2x)
- Oil level pipe surfaces and manual retraction
- Rinse piping
- Renew the breather cap and Oil level eye
- Various fasteners

Inspection and repair on LOHMANN+STOLTERFOHT Pneumaflex gearbox

Scope of work:

- Remove clutch
- Disassembly the clutch at shipyard workshop
- Cleaning al parts

Replacing parts:
- Seal ring
- Seal ring
- 4x Seal ring
- 4x O-ring (Emergency bolts)
- Reassemble clutch
- Install clutch back on board

After complete reassembly of the clutch a pressure test was performed. During this pressure test, a pressure of 8 bar was applied to engage the clutch. No leaks were observed

The travel of the liners was recorded after pressurizing and after assembly of the clutch between the propulsion gearbox and the diesel engine.

Recommendations

Recomme

Inspection and repair on RENK HSU-1120 gearbox

Inspection and repair on KUMERA gearbox

Inspection and repair on CONRAD STORK RB 450/3H gearbox

The condition of the sand pump gearbox can be considered as good. The gears are in good condition and no major bearing damage has been observed.

Recommendations are:
- To install a breather cap with filter to prevent foreign particles from entering the gearbox
- To adjust the oil level in the gearbox according to the marks on the dipstick
- To establish a schedule of yearly visual inspections.

Inspection and repair on WGW 355/S/SO gearbox

Large parts of the cabinet house contain places where less than 80% of the original wall thickness is present. It is therefore advisable not to reuse the cabinet.

Inspection and repair on HITACHI MGRP-5016-VC gearbox

Inspection and repair on HURTH HKS A 18-292 gearbox

Upon arrival, the oil had been drained from the gearbox and the cardan shaft disassembled.

After the disassembly of the coupling, the oil return channel was visible. No details were found in this, but it was blown through with compressed air and brake cleaner.

Since the gearbox was already deprived of its lubricating oil on arrival, it is not possible to retrieve it or the oil level was exceeded.

Since this gearbox is equipped with a labyrinth instead of lip seals, a too high oil level can lead to leakages.

Inspection and repair on TACKE gearbox

The condition of the three gearboxes can be considered as good, no indications of bearing damage have been observed and the toothing is in good condition.

Grooves or undulations were observed on both sides of the gears. This structure comes from the production process and not a sign of damage.

Inspection and repair on ULSTEIN 4500AGC-KP gearbox

Inspection and repair on HANGZOU ADVANCE GEARBOX GWC6066 gearbox

Scope of work:

- Overhaul Propulsion GBX malfunction of input shaft, gearwheel side bearing.

During the repair and sea trial it can be concluded that the gearbox is overhauled successfully.

Inspection and repair on ULSTEIN 4500AGC-KP gearbox

Scope of work:

- Repair Propulsion GBX SB & PS
- PTO-shaft renew bearings o OD-box overhaul o Distribution station overhaul / repair o Oil filter unit repair o Oil cooler overhaul

PTO shaft PS was found with a high axial movement this was caused by a faulty bearing. The axial movement was visible at the generator coupling. The bearing cage was broken hereby the rolling element were found inside the gearbox carter. These rolling elements were taken out and the gearbox is cleaned inside. The PTO shaft bearings were replaced and the axial movement is readjusted to 0.10mm.

Inspection and repair on BUSS G-160 gearbox

Inspection and repair on CMD JC62 JUMBOREX gearbox

After the disassembly of the shafts and the bearings, a recommendation has been provided of what was necessary to replace in order to get the gearbox running. In addition, we investigated what was causing the damages. The mechanics and engineers were able to provide sufficient information on what has occurred after which the situation was clear.

Inspection and repair on JAHNEL-KESTERMANN GD-A1S710 gearbox

Scope of work:

- Dismantling of the generator gearbox
- Inspection and measuring of the generator gearbox
- Reporting
- Assembly and revision according to revision inspection report
- Measuring during assembly
- Test run of the gearbox

Inspection and repair on JAHNEL-KESTERMANN CD-2G3900 gearbox

Inspection and repair on FLENDER KFO 630 gearbox

- Visually check the cabinet for cracks, where possible
- Visually checking the preservation internally and externally
- Checking the holes for damage and dimensions
- Checking the flatness (fit) of the division planes

Inside work:
- Checking condition of the toothing of all gear transmissions
- Checking the bearings for damage phenomena
- Checking bearing images and flank clearance of all gear transmissions
- Checking the shaft sizes for the bearings, oil seals, gears and couplings on dimensions and damage
- Checking the toothing for cracks by means of Magnaflux.

Inspection and repair on FLENDER SDN 400 gearbox

- Disassembly, cleaning and inspection
- Renew the bearings and seals
- Renew various small equipment
- Assembly and adjustment
- Test run with reporting
- Store the gear box externally in a 2-layer paint

Additional work following from inspection
- Dabbing the cupboard, dividing surfaces and bores
- Inside steps 1st stage, Incoming pinion shaft overhaul and Renew wheel teeth at least after grinding
- Retract 2nd stage, Pinion shaft and Gearwheel gear manually
- Inside 3rd stage, Pinion shaft and gear teeth Manually run after
- Machining the 3rd stage, pinion shaft and output shaft, cacking and retraining
- Renew the keys an

Inspection and repair on BUSS G-160 gearbox

The state of the gearbox can be considered as good, in the vibration analysis no indications for bearing or dental damage have been observed. The perceived rumble in the gearbox has been successfully remedied by increasing the flank clearance of the bevel gears.

Gearbox At the location of the input shaft, a large amount of harmonics of an unknown frequency was detected in the acceleration spectra. The origin of this signal could be related to an observed high-frequency sound in the vicinity of the 1st and 2nd stages. A slight tap has also been observed. However, the amplitudes of these two signals are not so high that immediate action is justified.

Electric motor on both

Inspection and repair on BUSS G-160 gearbox

We advise:
- A comprehensive inspection by removing the upper division
- Let the I-care engineer set an automatic alarm which can warn in time if the amplitude of the tick increases
- Perform a vibration measurement and visual inspection every six months

Inspection and repair on TWIN SCREW TEX140S gearbox

gearbox-repair/flender/flender-h3hh19-110032.php

Inspection and repair on FLENDER COHA-100 gearbox