Engine Overhaul vs. Rewitec Coating
Diesel-electric trains |
MTU 12V 183 TD13 diesel |
Challenge in 2005
Two similar units of the Swiss Railways (SBB) were evaluated. Diesel- electric trains 2/6 model 1996 with 2 MTU 12V 183 TD13 diesel engines 738 HP (550 KW) with a weight of 51 Tons were used in both cases.- In February 2005, Unit 672 was overhauled according MTU/DB Spec package W6.
- In September 2005, Unit 673 was coated with Rewitec Surface Treatment.
- Radial sealing in the crankcase were renewed in both engines.
Outcome September 2006
After 12 and 18 months in operation respectively, Unit 673 coated with Rewitec had more power and quieter run than the overhauled engine of unit 672.
Overhauled Unit 672 had higher vibrations, to the point where the alternator holder broke. These vibrations were not seen in the Unit 673 treated with Nanocoating.
Bushings and bearings in both units were inspected and found in similar condition.
Results
Total cost for overhaul unit 672: about $38,000
Total cost for Rewitec surface treatment unit 673: $1,700
Based on this experience, Mr Reinhard Serchinger who conducted the evaluation recommended a more cost effective and service efficient treatment for diesel engines using Rewitec in order to avoid a costly overhaul.
Reference
Swiss Railways SBB
SePhys, Mr Reinhard Serchinger,
Office +49-89-512 6153-0
Mobil: +49-89-171-204 4602
Email: info@sephys.de