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TfW class 398 Stadler Citylink tram trains

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StripeyNick

Member
Joined
25 Apr 2012
Messages
409
Location
Cowbridge, S.Wales
Was on 398030 when it got taken out of service earlier today at Taffs Well with an MCB fault (according to the driver). Quite a minimal delay. It was sent straight into the depot and a 756 picked everyone up about 5 minutes later.

Looks like 398031 came out to take over the diagram
 

trainspotter4

Member
Joined
24 Jul 2025
Messages
45
Location
Cardiff
Not sure if I'm reading this right but just looking through RTT then, all the units which left this morning for service have been pulled and are in the process of being swapped out or have stopped moving, is there a wider issue?
 

tfw756rider

On Moderation
Joined
30 Nov 2024
Messages
1,953
Location
Wales (sometimes in England), thanks for replying!
398023 out in service for the first time today I believe, starting with 3B00 Taff Dep - CDQ, then 2B00 0632 CDQ-CDB. Diagram TW302.
https://www.realtimetrains.co.uk/service/gb-nr:G39044/2026-09-08/detailed#allox_id=0
Yup, first passenger turns for that one. Another for the list.
Thanks for letting us know both :)

The entry-to-service of 398023 'today' (Tue 8/9/26) now means that 11 (of 36) 398s have been in service:

398017-018, 398021-025, 398028-031

The number of 398s still to enter service is down to 25:

398001-016, 398019-020, 398026-027, 398032-036

=============================

The overall number of new Transport for Wales (TfW) trains that have been in service is now up to 122 (of 148):

76 (of 77) 197s
All 11 231s
11 (of 36) 398s
All 24 756s

This leaves 26 new TfW trains still to enter service:

1 197
25 398s
 

Markdvdman

Member
Joined
14 Aug 2011
Messages
493
Location
Merthyr Tydfil / Gorslas
25 398s yet to be in service is a joke when they said 2023! For all the ex moaning and complaining how bad the 398s are this is not a good look! Less than a third in testing is bad! However, they do have no choice and we need to see testing of 3+3 units for peak times that is the game changer! Sort that and we have half a chance!
 

chargesmith

Member
Joined
14 Nov 2023
Messages
262
Location
South Wales
Not sure if I'm reading this right but just looking through RTT then, all the units which left this morning for service have been pulled and are in the process of being swapped out or have stopped moving, is there a wider issue?
All looks OK at the moment but we now have 022, 029 and 030 out so it looks like two units were swapped. Appears to have happened at different times so likely two separate issues.
 

Chris125

Established Member
Joined
12 Nov 2009
Messages
3,269
Location
Isle of Wight
25 398s yet to be in service is a joke when they said 2023! For all the ex moaning and complaining how bad the 398s are this is not a good look! Less than a third in testing is bad! However, they do have no choice and we need to see testing of 3+3 units for peak times that is the game changer! Sort that and we have half a chance!

What would you have done differently?
 

Coleridge

Member
Joined
14 Mar 2023
Messages
163
Location
Penarth
Todays 398 selection:

398017
018
031

These three units have been out before, so it's still only 11 out of 36 units that have seen public service.

I think it's now safe to say that TfW's very public announcement last spring that the 398s would be introduced on the Treherbert, Aberdare and Merthyr lines "later this summer" was overoptimistic. A forum member who said at the time that the timescale was unachievable, and that it would more likely be 2027, was vilified for saying so.

There is clearly something very wrong with these units, and with the entire project, and I can't help feeling that there is a wilful blindness on this forum to those issues and a refusal to even discuss them. That, to me, would be a much more interesting discussion than cheering every time one more unit manages to make its way out of the depot.

I'd really like to know, for example, why two of the three units that were out in public service yesterday were apparently pulled during the day and replaced with other units, but anyone with inside knowledge that is not upbeat and positive gets treated very badly here.
 

stuu

Established Member
Joined
2 Sep 2011
Messages
3,765
These three units have been out before, so it's still only 11 out of 36 units that have seen public service.

I think it's now safe to say that TfW's very public announcement last spring that the 398s would be introduced on the Treherbert, Aberdare and Merthyr lines "later this summer" was overoptimistic. A forum member who said at the time that the timescale was unachievable, and that it would more likely be 2027, was vilified for saying so.

There is clearly something very wrong with these units, and with the entire project, and I can't help feeling that there is a wilful blindness on this forum to those issues and a refusal to even discuss them. That, to me, would be a much more interesting discussion than cheering every time one more unit manages to make its way out of the depot.

I'd really like to know, for example, why two of the three units that were out in public service yesterday were apparently pulled during the day and replaced with other units, but anyone with inside knowledge that is not upbeat and positive gets treated very badly here.
That forum member made some unbelievably outlandish claims, completely destroying any credibility. These units seem to be being introduced carefully, which given the recent history of new trains seems entirely sensible. Take a look at the 810 thread if you want a real horror story
 

chargesmith

Member
Joined
14 Nov 2023
Messages
262
Location
South Wales
That forum member made some unbelievably outlandish claims, completely destroying any credibility. These units seem to be being introduced carefully, which given the recent history of new trains seems entirely sensible. Take a look at the 810 thread if you want a real horror story
The careful approach likely also explains why units are being taken out of service so frequently, especially as whenever it happens the same units are often out again the next day.

My theory is that any issue (no matter how small) leads to a return to depot for investigation.

Even the one that actually needed to be rescued has been out again since.
 

Peter Sarf

Established Member
Joined
12 Oct 2010
Messages
9,602
Location
Croydon
Yeah 031 is on the diagram today. First Sunday service by a 398.
+
398023 out in service for the first time today I believe, starting with 3B00 Taff Dep - CDQ, then 2B00 0632 CDQ-CDB. Diagram TW302.
https://www.realtimetrains.co.uk/service/gb-nr:G39044/2026-09-08/detailed#allox_id=0
+
Yup, first passenger turns for that one. Another for the list.
Thanks all. List duly updated.
I feel a list coming on :-

398001
398002
398003
398004
398005
398006
398007
398008
398009
398010
398011 Testing from 15/08/2026
398012
398013 Testing from 19/08/2026
398014
398015
398016 Testing
398017 In service on 28/07/2026 6th, two in service 03/08/2026 (398017 and 398029 not coupled)
398018 In service on 10/08/2026 8th, Testing (multi ?) before
398019 Seen at Merthyr on 22/08/2026, presumably testing ?.
398020 Testing (multi)
398021 In Service on 18/08/2026 9th
398022 In service on 03/07/2026 4th (all day 23/07/2026)
398023 In service on 08/09/2026 11th
398024 In service on 25/06/2026 3rd
398025.In service on 02/09/2026 10th
398026 Testing from 18/08/2026
398027
398028 In service on 23/06/2026 1st
398029 In service on 31/07/2026 7th, also did first weekend service (Saturday 01/08/2026), two in service 03/08/2026 (398017 and 398029 not coupled)
398030 In service on 14/07/2026 5th
398031 In service on 24/06/2026 2nd
398032.Old Dalby
398033
398034.Delivered on 14/05/2026 ?
398035.Not yet delivered
398036.Not yet delivered

First day with two in service 03/08/2026 017 & 029.
First day with three in service 19/08/2028 017, 029 & 031.
First rescue of a 398 (022) by two other 398s (possibly T&T as reversal required) 01-02/09/2026 - successful.
. . . 398031 leading to Taffs Well with 398028 on the rear.
First Sunday service using a 398 06/09/2026 398031.

That is all the past dates (before 01/08/2026) I can unearth.

Below is a list of 398s in the order they entered service (I have decided to make life more complicated !).
Order, Unit, date, (days elapsed)

01 398028 23/06/2026

02 398031 24/06/2026 (1)

03 398024 25/06/2026 (1)

04 398022 03/07/2026 (8)

05 398030 14/07/2026 (11)

. . . Milestone : First all day service on 23/07/2026 (398022)

06 398017 28/07/2026 (14)

07 398029 31/07/2026 (3), also did first weekend service (Saturday 01/08/2026), two in service 03/08/2026 (398017 and 398029 not coupled)

. . . Milestone : First day with two in service 03/08/2026 (398017 and 398029 not coupled)

08 398018 10/08/2026 (10)

09 398021 18/08/2026 (8)

. . . Milestone : First day with three in service 19/08/2028 (398017, 398029 & 398031).

10 398025 02/09/2026 (15)

. . . Milestone : First use on a Sunday 06/09/2026 (398031)

11 398023 08/09/2026 (6)
 

Towers

Established Member
Joined
30 Aug 2021
Messages
2,985
Location
UK
It was done with 2 units. One front, one rear and 5mph max. Not sure if the 5mph max is necessary for all rescues or if there was something specific with this one for the speed restriction. There was a long list of faults displayed that couldn’t be rectified so hard to know.
Surely a new low in the railway making recovery of a failed train farcically difficult!
 

craigybagel

Established Member
Joined
25 Oct 2012
Messages
5,826
I think it's now safe to say that TfW's very public announcement last spring that the 398s would be introduced on the Treherbert, Aberdare and Merthyr lines "later this summer" was overoptimistic. A forum member who said at the time that the timescale was unachievable, and that it would more likely be 2027, was vilified for saying so.

That forum member made some unbelievably outlandish claims, completely destroying any credibility. These units seem to be being introduced carefully, which given the recent history of new trains seems entirely sensible. Take a look at the 810 thread if you want a real horror story
You could question the reliability of any TOCs announcements about introducing a new fleet over the last 10 years. It was hardly a master stroke suggesting that there were likely to be issues here. It was the other posts, many of which were demonstrably inaccurate, that got the poster "vilified".
Surely a new low in the railway making recovery of a failed train farcically difficult!
As painful as it is, it's hardly the first time a broken train has required both top&tailing and a 5mph speed limit. If the nature of the fault means the brakes can't be relied upon, then you either do that or load it on the back of a truck.
 

John R

Established Member
Joined
1 Jul 2013
Messages
6,099
These three units have been out before, so it's still only 11 out of 36 units that have seen public service.

I think it's now safe to say that TfW's very public announcement last spring that the 398s would be introduced on the Treherbert, Aberdare and Merthyr lines "later this summer" was overoptimistic. A forum member who said at the time that the timescale was unachievable, and that it would more likely be 2027, was vilified for saying so.
Amongst the many things that forum member said, was, in Post 1559, after a list of things that were apparently wrong:-

I’m sorry to be repeatedly negative, but I can’t see these things happening. They need to cut the loss and look at alternatives.

Well here we are four months later with 3 units performing all day diagrams, and on the face of it, with reasonable reliability for a brand new fleet. Yes of course there will be some failures, but TfW are being very sensible in phasing their introduction with a route where a failure will have minimal impact, allowing a shakedown of the units in service for any problems to emerge that weren't seen in non-passenger testing (which often happens).
 

BillStampy

Established Member
Joined
6 Jan 2024
Messages
1,591
Location
Llanharan
TfW seem to have withdrawn the TAM line running plans for next week, which I'm not entirely shocked about, but hopefully it's still not long away. We shall see! (Paths have now disappeared on RTT and replaced with paths from Canton for a 756 to do the diagram instead)
 

XFeed

Member
Joined
25 Nov 2025
Messages
296
Location
Chester
These three units have been out before, so it's still only 11 out of 36 units that have seen public service.

There is clearly something very wrong with these units, and with the entire project.

As an outsider looking in for a little while it does seem that the units and the introduction has been pretty troubled and still appears to be so despite the best efforts of the maintenance teams I`m sure and even more so than the 197s ?

On a personal note I would like to know the technical problems encountered each time and if they are reoccurring on a regular basis ?
 

snalty

Member
Joined
26 Mar 2017
Messages
34
First two journeys on 398s today, only the shuttle from Queen Street to the Bay and back mind but thought they were mostly fine. Only complaints from the staff on board was how close the seats are to the cab doors.
 

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