Post by angelislington on May 15, 2009 8:51:22 GMT
A friend of MRFS42's & mine is a diseasel engineer, and he recently posted the following on another forum we're on:
Pics available here.
indeed!
Here's some pictures of a Class 60 loco. after one of the air valves failed on No. 7 head and got involved with the piston (the result of a bad batch of valves).
The driver's defect report was interesting. He reported that as he pulled out of Ravenscraig Steelworks some trainspotters were waving to him enthusiastically from the overbridge. It wasn't until the driver of a train going the other way made throat-slitting gestures to him that he peered back along the loco. and noticed the flames shooting into the sky from the roof above the engine compartment. He shut the engine down and operated the fire extinguishers.
When the valve fell in, the piston crown broke up , leaving the skirt still running up and down the liner. The lack of an air valve allowed exhaust gas the travel through no. 7 cylinder into the alloy air manifold, burning a hole in it and allowing the hot gas to attack the roof section. All rather spectacular.
The loco. eventually got dragged back to Thornaby depot where some maniac stated the engine up and it's testament to the robust nature of the MB275T engine that it sat happily idling in the yard for the best part of a day before someone went to see what the noise was and shut it down again =:-O
The driver's defect report was interesting. He reported that as he pulled out of Ravenscraig Steelworks some trainspotters were waving to him enthusiastically from the overbridge. It wasn't until the driver of a train going the other way made throat-slitting gestures to him that he peered back along the loco. and noticed the flames shooting into the sky from the roof above the engine compartment. He shut the engine down and operated the fire extinguishers.
When the valve fell in, the piston crown broke up , leaving the skirt still running up and down the liner. The lack of an air valve allowed exhaust gas the travel through no. 7 cylinder into the alloy air manifold, burning a hole in it and allowing the hot gas to attack the roof section. All rather spectacular.
The loco. eventually got dragged back to Thornaby depot where some maniac stated the engine up and it's testament to the robust nature of the MB275T engine that it sat happily idling in the yard for the best part of a day before someone went to see what the noise was and shut it down again =:-O
Pics available here.
indeed!
