Daihatsu 6DL16 Onsite Crankshaft Grinding | Dubai
RA Power Solutions was approached by a prominent Dubai-based shipping firm concerning damage to two crankpins of a Daihatsu auxiliary engine aboard one of their boats, necessitating onsite crankshaft repair.
The details of the crankshaft of Daihatsu 6DL-16 are as follows:
The inspection was conducted by RA Power Solutions technicians, and the following observations were made:
Upon arrival, a detailed inspection was conducted by our technicians.
It was informed that a local company based in Dubai was engaged to undertake the repair of two crankpins that were damaged.
The crankshaft repair company based in Dubai took eight days to repair the two crankpins, and the bearings failed twice within 10 minutes of engine operation.
RA Power Solutions technicians did the dimensional inspection of crankpins. They were surprised to note that the crankpins, after grinding by a Dubai-based company, had ovality up to 0.12 mm against the maximum permissible limit of 0.03 mm by Daihatsu.
Our technicians observed the readings before grinding, which are mentioned below:
SIZE OF CR JOURNAL SIZES IN MM
On further investigation, RA Power Solutions was informed that the company from Dubai had no specialized equipment/tooling to undertake the grinding of the Daihatsu 6DL-16, having a standard diameter of 120 mm and crankpin bearing width of only 64 mm. They did it by hand and were not able to control the ovality.
Action taken by RA Power Solutions Technicians
RA Power Solutions technicians, after initial inspection for dimensions, hardness, MPI for crack detection, etc., undertook the grinding of crankpins 1 & 4 and undersized both crankpins by 1.0 mm.
The final report after grinding is pasted below:
SIZE OF CR JOURNAL SIZES IN MM
It can be seen from the above readings that the taper & ovality were controlled within 0.02 mm. The engine was commissioned in the presence of our technicians and was operating satisfactorily.
Achievement by RA Power Solutions
The grinding of the crankpin of Daihatsu 6DL-16 needs specially designed, compact onsite crankshaft grinding equipment which RA Power Solutions has developed. This equipment is manufactured in two parts and is inserted from the inspection window of the engine block.
In this case, the crankpin diameter is only 120 mm, and the crankpin bearing width is 64 mm. We have designed the equipment that can undertake grinding/polishing of the crankpin without removing it from the entablature.
We have been extending our onsite services all over the world for the last forty-three years and regularly work on high RPM engines like Daihatsu, Yanmar, Volvo, MAN B&W, Caterpillar, Cummins, Deutz Engines, etc.
RA Power Solutions is an ISO 9001:2015 (Quality Management System) & ISO 14001:2015 (Environmental Management System) certified, approved company.
We have been regularly executing the on-site crankshaft repairs and crankshaft grinding in Dubai, Oman, Saudi Arabia, Qatar, Abu Dhabi, Sharjah, Ajman, Umm Al-Quwain, and Fujairah, Bahrain, Kuwait, Iraq, Antigua and Barbuda, Belize, Dominica, Dominican Republic, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad, and Tobago, etc.
For more details on the repair of the engine and onsite crankshaft replacement, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
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