Daihatsu 5DC-17 Engine Crankshaft Machining | Onsite Grinding of Daihatsu 5DC-17 Crankshaft
We were approached by a shipping company based in Croatia regarding a problem faced by them in the crankshaft of Daihatsu 5DC-17.
The vessel was scheduled to reach Hamburg port and our technicians boarded the vessel in a short time due to availability of Indian CDC.
FOLLOWING ARE THE DETAILS OF CRANKSHAFT OF DAIHATSU 5DC-17:-
|
S. NO |
Crankshaft Details |
|
|
1 |
Engine Make |
Daihatsu |
|
2 |
Engine Model |
5DC-17 Engine |
|
3 |
Crankpin Diameter Standard |
145mm |
|
4 |
Crankpin Bearing Width |
76mm |
|
5 |
Name of Vessel |
MV BU JAPA |
The crankpins five nos. were subject to inspection and to our surprise ovality ranging from 0.62 mm to 0.76 mm was observed in the crank pins which is not a normal phenomena our technicians were rather surprised as how come they were operating the engine.
THE CALIBRATION REPORT OF 5 NUMBERS OF CRANK PINS OF DAIHATSU 5DC-17:-
STANDARD DIMENSION: 145.00 mm
STANDARD /SPECIFIED NO. SIZES IN MM
SIZE OF CR PINS
|
|
A |
Aa |
C |
Cc |
B |
Bb |
Min |
STD |
Ovality |
|
CR-1 |
144,24 |
144,7 |
144,38 |
144,88 |
144,36 |
144,62 |
144,24 |
145 |
0.76mm |
|
CR-2 |
144,32 |
144,7 |
144,44 |
144,89 |
144,38 |
144,82 |
144,32 |
145 |
0.68mm |
|
CR-3 |
144,33 |
144,74 |
144,4 |
144,86 |
144,38 |
144,74 |
144,33 |
145 |
0.67mm |
|
CR-4 |
144,38 |
144,8 |
144,4 |
144,9 |
144,46 |
144,79 |
144,38 |
145 |
0.62mm |
|
CR-5 |
144,3 |
144,6 |
144,39 |
144,76 |
144,33 |
144,66 |
144,3 |
145 |
0.70mm |
- The hardness of all crank pins was taken by a portable hardness tester and was observed between 229 to 243 on HB scale which is normal.
- All the crank pins were also subject to crack detection by MPI, no crack or abnormality was observed.
- Deflection of the crankshaft was taken and was found within limits.
REPAIR OF CRANKSHAFT OF DAIHATSU 5DC-17 EXECUTED SUCCESSFULLY BY RA POWER SOLUTIONS:-
- Considering the maximum ovality of 0.76 mm and the deep line marks observed on crank pins we had no option but to under size all the 5 crank pins to 143.00 mm i.e. 2 mm under size in comparison to the standard diameter of 145.00 mm
- THE FINAL INSPECTION REPORT OF 5 NO. CRANKPIN IS PASTED BELOW:-
STANDARD DIMENSION: 145.00 mm
STANDARD /SPECIFIED NO. SIZES IN MM
SIZE OF CR PINS
|
|
A |
Aa |
C |
Cc |
B |
Bb |
Min |
Max |
Ovality |
|
CR-1 |
142,99 |
142,98 |
142,98 |
142,99 |
142,99 |
143 |
142,98 |
143 |
0.02mm |
|
CR-2 |
143 |
142,98 |
142,99 |
142,98 |
143 |
142,99 |
142,98 |
143 |
0.02mm |
|
CR-3 |
142,98 |
142,97 |
142,99 |
142,98 |
142,98 |
142,99 |
142,97 |
142,99 |
0.02mm |
|
CR-4 |
142,99 |
142,98 |
142,99 |
142,98 |
143 |
143 |
142,98 |
143 |
0.02mm |
|
CR-5 |
142,99 |
143 |
142,98 |
142,99 |
143 |
142,99 |
142,98 |
143 |
0.02mm |
- The under size bearings of 2 mm were arranged by RA Power Solutions on priority.
- As a matter of caution, our technicians inspected all the connecting rods and their big end bore was polished.
- Dimensionally big end and small end bore of connecting rods were within limits.
- The engine was assembled and was put into operation.
RA Power Solutions is proud of the successful repair of the crankshaft of Daihatsu engine 5DC-17 which was rejected by a leading crankshaft repair company based in Europe because of not having the necessary tooling with them.
With the advanced technological equipments available with RA Power Solutions, it was possible to grind the crankshaft having a standard diameter of 145 mm with a crank pin length of only 64 mm.
Damage Crankpin before Repair of Daihatsu 5DC-17 Engine Crankshaft
Crankpin of Daihatsu 5DC-17 Engine Crankshaft before Repair
Crack Detection by MPI
Crankshaft Grinding of Daihatsu 5DC-17 Engine
For more information, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
Visit our website: http://turbineshaft.in/