Arriva Trains Wales

[SK15 GZG (Moderator)]

RE: Arriva Trains Wales

(15/07/2015 14:51)DVG526 Wrote:  158834 has had a new Voith DIWA transmission fitted for fuel consumption evaluation, the new transmission is also much lighter than the old one. The unit now sounds a lot different with a clear Voith whining and bus style change through of gears when accelerating (similar to LM Class 172 or DB Class 642)

South West Trains' 158885 is interesting as one of its driving cars has a ZF transmission instead of the standard Voith - I'd be interested to hear what it sounds like with two different transmissions!

(15/07/2015 15:17)wirralbus Wrote:  You have to think that these trains as such where built between 22 and 25 years ago now and technology has changed over the years in engines , gearboxes and such like .

The 158's when new had Cummins and Perkins engines in them. Strange that there was only a small amount with the Perkins engines in them .

A total of 48 Class 158s (around a quarter of all 158s built) were built to a non standard specification so that they could be fitted with Perkins engines as opposed to the Cummins NTA855R1 350bhp engines that are installed on 158701-814 and 158901-910. The final batch of Class 158 units (158863-872) were fitted with a more powerful 400bhp Cummins engine (NTA855R3)

I'd certainly be interested to know why 158815-862 were fitted with Perkins engines instead of Cummins engines