Daihatsu DC 17 Crankshaft Repair | Crankshaft Grinding

Daihatsu 5DC-17 auxiliary engine installation on vessels is very common. The population of Daihatsu 5DC-17 is very high. In spite of being one of the popular auxiliary engine, there is a major problem which ship owners are facing in the crankshaft.

We will like to summarize problems faced in the Crankshaft of Daihatsu 5DC-17 as following

• Daihatsu 5DC-17 auxiliary engine crankshaft has a standard diameter of 145 mm. The crankpin bearing width is only 64 mm.
• The manufacturer of Daihatsu engine for the reasons best known to them have designed the crankshaft to have a hardness of only 240 HB. It is called a soft crankshaft in a common language.The taper & ovality beyond the maximum permissible limit is developed, causing various problems including failure of bearings.
  
• Due to the low hardness of the crankshaft crank pin & main journal diameter are worn out very fast.
• The taper & ovality beyond the maximum permissible limit is developed, causing various problems including failure of bearings.
• Due to the crankpin bearing width of only 64 mm no other company in the world has the equipment to undertake the grinding of crankpin in situ as they don't have equipment as small as to sit on the crankpin diameter of 145 mm with a crank pin bearing length of only 64 mm.
• It is our experience that the excessive taper & ovality develops normally after an operation of the engine for approximately 30000 hours whereas in the case of Daihatsu DC-17 ovality & taper develop within short hours of operation.

Damage Crankpin before Repair of Daihatsu 5DC-17 Engine Crankshaft	Crankpin of Daihatsu 5DC-17 Engine Crankshaft before Repair

Successfull in situ repair of Daihatsu DC-17 Crankshaft by RA Power Solutions

• RA Power Solutions having forty-three years of experience in grinding of crankshaft is also a manufacturer of onsite portable crankshaft grinding equipment up to 700 mm. We have sold more than seventy machines all over the world.
• After studying the problem of frequent damage of Daihatsu DC-17 crankshaft and in order to repair it onsite onboard the vessel and without removing it from the engine block RA Power research and development team of engineers developed a state of art crankshaft grinding equipment which is capable of grinding the crank pin without removing the crankshaft from the engine block.
• The machine is lightweight & compact and it is inserted from the inspection window.
• The tolerance and all parameters are maintained within limits strictly as per the manufacturer recommendations.
• The crankshaft of Daihatsu DC-17 which has been rejected by the Daihatsu engine manufacturer & leading companies based in Europe undertaking repair of crankshaft are successfully repaired by RA Power Solutions saving the ship owners from the losses and reducing the downtime of the vessels.
• The grinding & polishing of the Daihatsu DC-17 is also possible while sailing the vessel.
• We have experience of reducing the crankpin diameter up to 3.0 mm.
• We maintain a stock of undersized crankpin bearing up to 3.0 mm. In most cases we send our technicians on board the vessel with undersized bearings, this facilitates the ship owners to assemble the engine immediately and put it back into operation.

Grinding under Process of Daihatsu 5DC-17	Crankshaft grinding of Daihatsu 5DC-17 Engine

Crankpin of Daihatsu 5DC-17 after grinding polishing	Crankpin of Daihatsu 5DC-17 Engine Crankshaft after Repair