MAN 8L28/32H Crankshaft Repair of a Power Plant in Sudan
The crankshaft of a MAN 8L28/32H engine installed at a power plant in Sudan was reported damaged, requiring immediate technical attention to avoid prolonged downtime. With over 46 years of global experience in crankshaft repair and insitu crankshaft grinding, RA Power Solutions was entrusted with executing this critical job.
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MAN 8L28/32H Engine Crankshaft
MAN 8L28/32H Engine Crankshaft |
Based on the initial damage report shared by the client, our engineering team developed a precise in situ crankshaft repair strategy. Customized tooling was manufactured in advance, and two highly skilled technicians were deputed to the site along with an onsite crankshaft grinding machine, enabling repairs to be carried out directly at the power plant in Sudan.
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| Damaged Crankpin of MAN 8L28/32H Engine Crankshaft | MAN 8L28/32H Crankpin Showing Surface Damage |
Crankpin Grinding Details – MAN 8L28/32H Engine
| S. No. | Crankpin Details | |
| 1 | Engine Make | MAN |
| 2 | Engine Model | 8L28/32H |
| 3 | Crankpin Diameter Standard | 230.00 MM |
| 4 | Crankpin Bearing Width | 95.00MM |
| 5 | Grinding of Crankpin Number | #01,#05,#07 |
| 6 | Polishing of Crankpin Number | #08 |
| 7 | Place of Execution of Grinding of Crankpin | Power Plant , Sudan |
| 8 | Name of the Engaged Company RA Power | Reputed Company from Germany |
| 9 | Date Of Execution | 07.06.2026 to 23.06.2026 |
MAN 8L28/32H Crankshaft – Observation and Assessment
Prior to grinding, all crankpins were thoroughly inspected and measured to evaluate wear, taper, and ovality. The measurements confirmed deviations from the standard diameter of 230.00 mm, with ovality values exceeding permissible limits—clearly indicating the necessity for precision grinding and polishing.
Pre-Repair Measurements:
- CR-1: Minimum diameter 229.81 mm, ovality 0.19 mm
- CR-5: Minimum diameter 229.90 mm, ovality 0.10 mm
- CR-7: Minimum diameter 229.93 mm, ovality 0.07 mm
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| MPI Testing of MAN 8L28/32H Diesel Engine Crankshaft | MAN 8L28/32H Crankpin During Grinding Process |
Repair Process Executed on MAN 8L28/32H Crankshaft | Power Plant | Sudan
The following repair procedures were executed onsite with strict adherence to OEM tolerances:
- Precision grinding of damaged crankpins #01, #05, and #07 to the recommended undersize
- Polishing of crankpin No. #08 to achieve the specified surface finish
- Continuous dimensional monitoring during machining to ensure accuracy and consistency
- Final inspection to confirm surface integrity and bearing compatibility
Final Dimensions After Repair | MAN 8L28/32H Crankshaft
After completion of grinding and polishing, the crankpins achieved excellent dimensional accuracy and surface finish.
- Final Diameter Range: 229.48 mm to 229.50 mm
- Achieved Ovality: Within 0.02 mm (well within acceptable limits)
This ensured proper bearing fitment, uniform load distribution, and long-term operational reliability of the engine.
Crankpin Size Measurements After Repair – MAN 8L28/32H Engine
| SIZE OF CR PINS AFTER REPAIR | |||||||||
| A | Aa | C | Cc | B | Bb | Min | Maxi | Ovality | |
| CR-1 | 229.50 | 229.49 | 229.50 | 229.49 | 229.49 | 229.48 | 229.48 | 229.50 | 0.02 mm |
| CR-2 | |||||||||
| CR-3 | |||||||||
| CR-4 | |||||||||
| CR-5 | 229.49 | 229.49 | 229.48 | 229.48 | 229.50 | 229.49 | 229.48 | 229.50 | 0.02 mm |
| CR-6 | |||||||||
| CR-7 | 229.50 | 229.49 | 229.48 | 229.50 | 229.49 | 229.48 | 229.48 | 229.50 | 0.02 mm |
| CR-8 | Polishing | ||||||||
The crankshaft was successfully repaired onsite and handed over for reassembly. The engine was recommissioned without dismantling or transporting the crankshaft offsite, resulting in significant savings in time and cost for the client, while restoring full operational reliability.
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| Crankpin Surface After In-Situ Grinding and Repair | Repaired MAN 8L28/32H Crankpin after polishing |
RA Power Solutions specializes in onsite crankshaft grinding, repair, and refurbishment for marine engines and power plant engines worldwide. Our proven expertise with MAN engines, advanced portable equipment, and highly experienced technicians allows us to deliver reliable and efficient solutions even under challenging site conditions.
For more information on onsite crankshaft repair, grinding of crankshaft, and crankshaft polishing please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.