southern442
Established Member
I'd be interested to see if the rether eccentric first class has been reupholstered in TfW colours?/4's have a declassified 1st class section
I'd be interested to see if the rether eccentric first class has been reupholstered in TfW colours?/4's have a declassified 1st class section
What is it that makes these units so unreliable?Of all three 769s that have been in traffic (either originals or replacements) at some time today, they have now all fallen by the wayside.
Yes all 3 have had a faults today 452 replaced by 008 at Rhymney, 008 then had issues at Lisvane and as you say returned to Canton and 006 has been replaced by 150242. Not a very good day.Which appears to have been stuck at Lisvane for 10 mins with issues and onward service from Central cancelled.
225KV??? Bloody hell, lol....Would have been cheaper and quicker to bung up the 225KV lol
Mainly engine faults I think. The 319s were never great for reliability but they were better than 142/143/150/153.What is it that makes these units so unreliable?
Ah ok. Shame they aren’t doing better in terms of reliability yet.Mainly engine faults I think. The 319s were never great for reliability but they were better than 142/143/150/153.
From any perspective this is not going well. How many units are now considered reliable? How far is this from being considered a failed project, albeit with no alternative at present?!
Well done haha.225KV??? Bloody hell, lol....
That would give you one hell of a shock!Well done haha.
Looking at this from a layman's POV, if I was TfW, I'd want abandon the 769 farce and scoop up the remaining 153s that have been sent off lease by EMR & WMR in the last few months, and run those in multiple on Penarth - Rhymney rather than faff around with 769s any longer. At least 153s are proven to actually reliably work. Obviously some would need to be PRM modified, with or without toilets.From any perspective this is not going well. How many units are now considered reliable? How far is this from being considered a failed project, albeit with no alternative at present?!
I have no idea what issues TfW are experiencing, but I would not jump to the conclusion they are all down to the new gensets.Mainly engine faults I think. The 319s were never great for reliability but they were better than 142/143/150/153.
What do you mean by "engine faults"? If it's the diesel engine in the gensets then as 319s, they didn't have any and they are new hardware anyway. The motors and their drive electronics are getting on but surely that is more a maintenance issue.Mainly engine faults I think. The 319s were never great for reliability but they were better than 142/143/150/153.
As far as I'm aware, most of the faults with the 769s are to do with the new equipment that has been fitted. Obviously they can still have all the usual faults that 319s had, e.g. door faults. As 319s they had an MTIN of 10-12,000 miles on Thameslink. Not great but better than most DMUs.What do you mean by "engine faults"? If it's the diesel engine in the gensets then as 319s, they didn't have any and they are new hardware anyway. The motors and their drive electronics are getting on but surely that is more a maintenance issue.
What are the 170s MTIN? 10 000 is very low, didn't the 350s get around 120 000?As 319s they had an MTIN of 10-12,000 miles on Thameslink. Not great but better than most DMUs.
Looking at Modern Railways.What are the 170s MTIN? 10 000 is very low, didn't the 350s get around 120 000?
Interesting that the most unreliable class 170s are the ones that have recently moved. This perhaps goes some way to credit the theory that cascaded stock experience teething troubles when they are moved.Looking at Modern Railways.
WMT 319s 12,127
Northern 319s 9,800
170s vary a lot.
Crosscountry 20,598
WMT 18,822
Scotrail 11,512
Northern 8,402
TfW 5,264
Possibly. But I wonder how well those 170s compared to the others when they were with their previous operator?Interesting that the most unreliable class 170s are the ones that have recently moved. This perhaps goes some way to credit the theory that cascaded stock experience teething troubles when they are moved.
If it's the engines themselves then that is a problem that belongs to Porterbrook, or ultimately MAN as the engines are a) proven in rail use and b) nearly new, (probably still within any warranty period that they had).As far as I'm aware, most of the faults with the 769s are to do with the new equipment that has been fitted. Obviously they can still have all the usual faults that 319s had, e.g. door faults. As 319s they had an MTIN of 10-12,000 miles on Thameslink. Not great but better than most DMUs.
... the 769s don't seem to behave like other DMUs as far as engine speeds are concerned. ...
Use of higher than normal (in some case full) engine speeds when decelerating or when stopped. There aren't a lot of regular runs of 769s on youtube and of course I haven't ventured down to Wales during lockdown to see for myself, but there's definitely been something odd about the way they behave up until now.In what way does their behaviour seem different to you?
Just from the video footage alone, the 769s don't seem to behave like other DMUs as far as engine speeds are concerned.
Interesting that the most unreliable class 170s are the ones that have recently moved. This perhaps goes some way to credit the theory that cascaded stock experience teething troubles when they are moved.
Yes, but idle speed (or a little above it) should be ample for that. DMUs tend not to idle as slowly as other commercial vehicles due to the reasons you cited, but there's still a substantial drop in engine speed (and thus noise) when they aren't under power.They should behave like Voyagers (their fellow DEMUs) or diesel FLIRTs? If they are running when the train is decelerating or not moving, this will I guess because of something else drawing power, e.g. topping up starting batteries, running the air compressors or whatever? Indeed, is what you are hearing the air compressor (which can sound a bit like a diesel engine on older EMUs) and not the engine at all?
Happens a lot. Reliability of 321s went through the floor when they moved to Northampton from Bletchley, for instance, though it picked back up again when they got used to them.