New Electrostar problems
 

So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

--
John Band
john at johnband dot org
www.johnband.org

New Electrostar problems
 

John B wrote:
So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

Axle bearing faults apparently, but no more detail. I mentioned this in a
reply to your other ID earlier...

Paul S

New Electrostar problems
 

On Jun 10, 2:17*pm, "Paul Scott"
wrote:
So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

Axle bearing faults apparently, but no more detail. I mentioned this in a
reply to your other ID earlier...

Aye, which is what prompted this post, to see if people who weren't
interested in the dregs of the strike thread knew anything about the
Electrostar problems. Should've acknowledged it was inspired by your
response tho', sorry.

--
John Band
john at johnband dot org
www.johnband.org

New Electrostar problems
 

On Jun 10, 1:57*pm, John B wrote:

So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

Found this by chance (another FCC webchat today it seems):

Q91
When do you expect to have the Class 377/5 units back in service and
why were they so unceremoniously withdrawn with such short notice?

A91
We stood down the 6 377/5 units last Friday due to a problem with the
earth return brushes which was found on unit 377 502 on routine
maintenance. We then examined 377 505 and found a similar problem. We
therefore stopped the fleet for examination and rectification. There
are 14 sets of return brushes on class 377/5 and not more than 30%
have been found defective on any unit. However we do not want these to
deteriate further and the situation to go unchecked so the
manufacturer, Bombardier, have been working on a solution. This
solution has started to be introduced today and we expect to have
trains back in service at the rate of two per day.

New Electrostar problems
 

On Wed, 10 Jun 2009 05:57:03 -0700 (PDT)
John B wrote:


So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

I wasn't aware the 378s were in service yet.

B2003

New Electrostar problems
 

On Wed, 10 Jun 2009 05:57:03 -0700 (PDT)
John B wrote:


So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

I wasn't aware the 378s were in service yet.

B2003

New Electrostar problems
 

wrote in message ...
On Wed, 10 Jun 2009 05:57:03 -0700 (PDT)
John B wrote:


So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

I wasn't aware the 378s were in service yet.


They aren't, but withdrawal for the same fault as the 377s would prevent
driver training and mileagae accumulation, further delaying introduction.

Paul S

New Electrostar problems
 

wrote in message
...
On Jun 10, 2:17 pm, "Paul Scott"
wrote:
So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

Axle bearing faults apparently, but no more detail. I mentioned this in a
reply to your other ID earlier...

Aye, which is what prompted this post, to see if people who weren't
interested in the dregs of the strike thread knew anything about the
Electrostar problems. Should've acknowledged it was inspired by your
response tho', sorry.

Seems bearings was a duff rumour anyway now...

Paul

New Electrostar problems
 

On Jun 10, 1:57*pm, John B wrote:
So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?


FWIW, JourneyCheck for FCC appears to list all the short formed
services on the Thameslink route:
http://www.jcheck.com/firstcapitalconnect

This is exceptionally bad timing, as the core Thameslink route will no
doubt be under considerable strain today with bods attempting to route
around the Tube strike.

New Electrostar problems
 

On 10 June, 16:29, Mizter T wrote:
On Jun 10, 1:57*pm, John B wrote:

So what's the latest (alleged) fault that's required the 377/5s and
378s to be taken out of service all about, then...?

FWIW, JourneyCheck for FCC appears to list all the short formed
services on the Thameslink route:
http://www.jcheck.com/firstcapitalconnect

This is exceptionally bad timing, as the core Thameslink route will no
doubt be under considerable strain today with bods attempting to route
around the Tube strike.

For strike and other reasons, I've used Thameslink through the middle
more than usual lately.

My impression is the same as many people's was back in the late 1980s:
incredibly slow, trains waiting minutes at every station and crawling
between stations (while keeping to time).

Also a huge delay and palaver in terminating trains at City Thameslink
(two staff shutting one set of doors at a time while a train stands
for several minutes).

I can't easily reconcile this, slow, grinding route with a service so
fast and frequent that no existing trains will be able to accelerate
fast enough to keep up. When and how is the seismic shift going to
happen?

New Electrostar problems
 

On Jun 10, 3:54*pm, "Paul Scott"
wrote:

Axle bearing faults apparently,


Seems bearings was a duff rumour anyway now...

No ... axle bearings are the traction return earth path. Think about
it ... there is no other point of contact for the earth path.

Putting two and two together, the report of 130 mm bearings on 377/5
compared to all previous 377/x with 120 mm bearings causing something
to come into contact that should not could be an electrical earth
issue.

--
Nick

New Electrostar problems
 

wrote in message
...
On Jun 10, 3:54 pm, "Paul Scott"
wrote:

Axle bearing faults apparently,


Seems bearings was a duff rumour anyway now...

No ... axle bearings are the traction return earth path. Think about
it ... there is no other point of contact for the earth path.

Ah I see. So where does brush gear come into it? I thought that would be
used to bypass the bearings to avoid heating effects. Might be thinking of
something else though...

Paul

New Electrostar problems
 

On Jun 10, 6:22*pm, "Paul Scott"
wrote:

Axle bearing faults apparently,

Seems bearings was a duff rumour

No ... axle bearings are the traction return earth path. Think about
it ... there is no other point of contact for the earth path.

Ah I see. So where does brush gear come into it? I thought that would be
used to bypass the bearings to avoid heating effects. Might be thinking of
something else though...

Actually I wrote that so fast I am in error ... bearings by virtue of
being metal are conductors, there is some kind of brush that AFAIK
provides the electrical path to avoid arcing in the roller bearing.
IIMU there is a brush within the bearing housing - maybe thats the
issue.

As I surmised on another forum, I suggest bearings size is the cause,
earth path issues the effect

--
Nick

New Electrostar problems
 

On Jun 10, 7:09*pm, wrote:
On Jun 10, 6:22*pm, "Paul Scott"
wrote:

Axle bearing faults apparently,
Seems bearings was a duff rumour
No ... axle bearings are the traction return earth path. Think about
it ... there is no other point of contact for the earth path.
Ah I see. So where does brush gear come into it? I thought that would be
used to bypass the bearings to avoid heating effects. Might be thinking of
something else though...

Actually I wrote that so fast I am in error ... bearings by virtue of
being metal are conductors, there is some kind of brush that AFAIK
provides the electrical path to avoid arcing in the roller bearing.
IIMU there is a brush within the bearing housing - maybe thats the
issue.

As I surmised on another forum, I suggest bearings size is the cause,
earth path issues the effect

--
Nick

I saw a 377/5 in FFC colours at West Hampstead yesterday, leading a
Southern liveried 377/2.

New Electrostar problems
 

On Jun 12, 2:02*pm, Darth Sunil wrote:
On Jun 10, 7:09*pm, wrote:





On Jun 10, 6:22*pm, "Paul Scott"
wrote:

Axle bearing faults apparently,
Seems bearings was a duff rumour
No ... axle bearings are the traction return earth path. Think about
it ... there is no other point of contact for the earth path.
Ah I see. So where does brush gear come into it? I thought that would be
used to bypass the bearings to avoid heating effects. Might be thinking of
something else though...

Actually I wrote that so fast I am in error ... bearings by virtue of
being metal are conductors, there is some kind of brush that AFAIK
provides the electrical path to avoid arcing in the roller bearing.
IIMU there is a brush within the bearing housing - maybe thats the
issue.

As I surmised on another forum, I suggest bearings size is the cause,
earth path issues the effect

--
Nick

I saw a 377/5 in FFC colours at West Hampstead yesterday, leading a
Southern liveried 377/2.- Hide quoted text -

- Show quoted text -

At least 3 are reported back in traffic from yesterday.

--
Nick