IE A063TECHNICAL REPORT OF THE TBILISI LOCOMOTIVE DEPOT
KT-6 locomotive compressor: faster air build-up, higher oil pressure, crankshaft kept
Pneumatic system charging accelerated, oil pressure in the lubrication system rose. 40 % — output, build-up to 7–8 atm (g), 14 → 10 s; 17 % — output, build-up to 1–6 atm (g), 55 → 47 s; 37 % — oil pressure on the warmed-up compressor, 3.5 → 4.8 atm (g) (2003).
with signatures and stamp
Key results
| EQUIPMENT | CONDITION BEFORE TREATMENT | WHAT WAS MEASURED |
|---|---|---|
| KT-6 compressor, serial No. 976178 | Crankshaft journal surface worn by more than 70 %; oil pressure 3.5–3.8 atm (g) | Air build-up time, oil pressure on the cold and on the warmed-up compressor, crankshaft journal condition at disassembly |
Compressor output
| BUILD-UP MODE | TIME BEFORE | TIME AFTER | OUTPUT |
|---|---|---|---|
| Build-up to 7–8 atm (g) | 14 s | 10 s | +40 % |
| Build-up to 1–6 atm (g) | 55 s | 47 s | +17 % |
Both ranges are regular build-up modes of the locomotive air system; measured on the depot test bench.
Oil pressure in the lubrication system
| MEASUREMENT MODE | BEFORE TREATMENT | AFTER 350 ENGINE HOURS | CHANGE |
|---|---|---|---|
| Warmed-up compressor | 3.5 atm (g) | 4.8 atm (g) | +1.3 atm (g) |
| Cold compressor | 3.8 atm (g) | 5.0 atm (g) | +1.2 atm (g) |
The unit's working mode is the warmed-up compressor; that figure is carried into the case header.
What the control disassembly revealed
| COMPONENT | BEFORE TREATMENT | AFTER 350 ENGINE HOURS |
|---|---|---|
| Crankshaft journal surface | Wear over 70 % | Wear 30 %, surface roughness smoothed out |
Surface condition was assessed visually at disassembly of the compressor before treatment and after the operating period.
Conclusion of the depot report
Current equivalent
Revitalizant gel for compressors and bearings →
Piston, screw and centrifugal compressors; rolling and sliding bearings running in an oil bath; machine-tool spindle units and slideways.
How such units are treated:
Method for this machine:
Limits of this report: The results relate to a KT-6 locomotive compressor treated on the depot test bench; on other units and operating modes the figures may differ.