Daihatsu 5DK-20 Engine Crankshaft Repair - RA Power Solutions

 RA Power Solutions was approached by a leading shipping company regarding  problem faced by them in the crankshaft of Daihatsu 5DK-20 Auxiliary Engine.

Action taken by RA Power Solutions to Repair of Crankshaft of Daihatsu 5DK-20 Engine

i) Two technicians were deputed to Vizag Port Visakhapatnam along with necessary onsite grinding equipment.

Following are the Daihatsu 5DK-20 Engine and Crankshaft details:

S. NO	Crankshaft Details
1	Engine Make	Daihatsu
2	Engine Model	5DK-20
3	Crank pin Diameter Standard	170.00 mm
4	Crankpin Bearing Width	78.00 mm
5	Place of execution of crankshaft repair	Vizag Port Visakhapatnam

 

ii) The 5 number crankpin were inspected and following are the main observations:

  Crankpin no. 1 was found damaged and following minimum & maximum readings were observed. 

      a) Minimum diameter observed :    169.75 mm

      b) Maximum diameter observed:    169.89 mm

Thus the total wear of the crankpin after damage was 0.25 mm which is considered to be very much on the higher side as the standard diameter specified by the Daihatsu engine manufacturer in their maintenance manual is 169.97 mm. 

iii) The deep bearing line marks were also observed on crankpin no. 1 due to seizure of crankpin bearing. 

iv) The remaining 4 crankpins diameter was observed within limits, in case of crankpin no. 2 and 5 the bearing lines marks were observed. 

v) The hardness and crack detection by MPI was undertaken and all the parameters were observed within limits as per the Daihatsu engine manufacturer.  

vi) The crankpin no. 1 grinding was undertaken to the first step undersize of 0.5 mm. It was jointly inspected by the chief engineer and RA Power technicians. 

vii) Since the deep bearings line marks were still present. It was decided to undertake the grinding to the next undersize of 1.0 mm.

viii) The crankpin was polished and after grinding & polishing the final size of 168.97 mm to 168.99 mm was maintained. The crankpin no. 2 and 5 were also polished.RA POWER can maintan the surface finish of less then 20 Ra value.

Damage of crankpin of Daihatsu Engine 5DK-20	Deep Bearing line marks on crank pin of Daihatsu Engine 5DK-20
Crack detection by MPI of Daihatsu Engine 5DK-20 crankshaft	Crack detection of crankpin Daihatsu Engine 5DK-20 by MPI
Damaged crank pin of Daihatsu Engine 5DK-20	Grinding of Daihatsu Engine 5DK-20 under progress

Successful Repair of Crankshaft of Daihatsu 5DK-20 Engine by RA Power Solutions:

The ship owners gave RA Power Solutions technicians only 18 hrs. to execute the job and this was successfully done by working non stop on board the vessel.

RA Power Solutions have been extending engine repair services all over the world and specialise in grinding of crankshaft up to 700 mm diameter. 

We are extending our services all over the world with guarantee and we are known for our sincerity and low prices.  

Crankpin of Daihatsu Engine 5DK-20 after Polishing	Crankpin of Daihatsu Engine 5DK-20 after grinding

Visit our website:  http://rapowersolutions.com/ or https://crankshaftgrindingmachine.com/ 

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