Transmission Failures

Fourbee

Hero Member

Posts: 672

Transmission Failures

« on: May 27, 2012, 17:13:41 »

There have been a few cases where Turbo's have experienced transmission related problems recently.

On one occasion I noticed a train pull into Reading, shut down engines quickly (Sunday). When it came to do the return journey the driver was unable to draw power (having shut down/started the engines about 3 times). Fortunately a replacement was found from the depot.

Does the reverser have to be in neutral in the cab before shutting down and would there be any advantage in selecting reverse before shutting down so the transmission was "ready to go" if you like?

Another thing I have noticed is engines tend to rev at maximum for about 2 minutes after start up - is this normal/automatic?


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gaf71

Hero Member

Posts: 305

Re: Transmission Failures

« Reply #1 on: May 28, 2012, 09:56:57 »

On the units I drive, you can shut down engines with the direction controller in any position, though it is generally done in Neutral or Off.
The 2 minutes of revving is probably the compressor speed up being used to build up enough air to get a brake release( amongst other things).


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IndustryInsider

Data Manager
Hero Member

Posts: 10120

Re: Transmission Failures

« Reply #2 on: May 28, 2012, 10:05:29 »

The reverser has four positions, 'reverse', 'neutral', 'forward' and 'off' in that order, so you can't reverse the transmission before you switch the desk off without then going through neutral and forward to get to the 'off' position and momentarily start to reverse it again if that makes sense? I must admit, gearboxes don't seem any more problematical than usual at the moment, though there are a heck of a lot of sets running around underpowered, which is thought to be down to problems with turbochargers.


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Fourbee

Hero Member

Posts: 672

Re: Transmission Failures

« Reply #3 on: June 01, 2012, 19:23:44 »

I have noticed some strange noises coming from the engines recently too. Akin to a car engine running without decent oil pressure.

The turbos are around 20 years old now. The engines have been replaced once in that lifetime I believe?


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dog box

Hero Member

Posts: 653

Re: Transmission Failures

« Reply #4 on: June 01, 2012, 22:08:30 »

all engines would be replaced during the exam cycle at a given mileage unless they go pop before


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All postings reflect my own personal views and opinions and are not intended to be, nor should be taken as official statements of first great western or first group policy

Chris from Nailsea

Administrator
Hero Member

Posts: 17895

I am not railway staff

Re: Transmission Failures

« Reply #5 on: June 01, 2012, 22:33:13 »

Thanks for that, dog box: should I add that 'technical term' to our acronyms page? Grin


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