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- Newsgroups: rec.railroad,aus.rail
- Path: sparky!uunet!munnari.oz.au!bruce.cs.monash.edu.au!monu6!yoyo.cc.monash.edu.au!brom
- From: brom@yoyo.cc.monash.edu.au (David Bromage)
- Subject: Re: ICE trains withdrawn in October?
- Message-ID: <1992Nov23.072527.18935@monu6.cc.monash.edu.au>
- Followup-To: rec.railroad,aus.rail
- Sender: news@monu6.cc.monash.edu.au (Usenet system)
- Organization: Monash University General Access Unix
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- References: <1992Nov19.221903.5009@cs.su.oz.au>
- Date: Mon, 23 Nov 1992 07:25:27 GMT
- Lines: 46
-
- Matthew Geier (matthew@cs.su.oz) wrote:
- : In article <TSOS.174.721926232@uni-duesseldorf.de> TSOS@uni-duesseldorf.de (Detlef Lannert) writes:
- :
- : >It's correct that they had problems with the rotor parts of the traction
- : >motors. I don't know if any of them actually broke but cracks showed up
- : >when the motors were inspected.
- :
- : A similar type of problem has showen up on Sydneys new 'Tangara' trains,
- : a unit derailed in a yard because a bogie collapsed. It was then found that
- : it an a number of other bogies in the set were cracked.
- :
- : >All motors had to be exchanged and the defective parts replaced. Luckily
- : >enough (for DB), this was still covered by the manufacturer's warranty,
- : >and Siemens had to pay for it (they indicated a cost of "not many" tens
- : >of millions DM).
- :
- : They claim the same thing here as well, that replacing the defective bogies
- : is being done as a warranty repair , only the cracks have been found in the
- : older units, the oldest of which is well over 2 years old. I rather doubt that
- : all are covered by warrenty.
- :
- : >The exchange and repair was done on the fly: The motors were replaced
- : >during normal service periods, and there were enough spare trains so
- : >that the normal schedule could continue. DB passengers shouldn't have
- : >noticed anything (as long as they didn't read the papers ...).
- :
- : Thats what they are doing here, they cant pull the entire tangara fleet
- : of the rails , the Suburban system cant run minus 70 train sets, so as
- : part of their fortnightly inspections the bogies are being checked for
- : cracks. At the last time the problem made the news , some 70 bogies had
- : been replaced, which comes out at 9 sets withdrawn, although I doubt the
- : 70 bogies neatly came 8 at a time off a given carrage set.
- :
- : (BTW these particular bogies were Japanese designed and have disk brakes
- : instead of 'tread' ? brakes. When the trains switch from regenerative/dynamic
- : braking to air as they slow down , the disk brakes emit a loud high pitched
- : squeel, some times accompanied by strong low frequency vibration, no wonder
- : they are cracking... )
-
- What does this mean for the Victorian 4D (prototype suburban emu, based on
- the Tangara). The train is a bit lighter than the Tangara and the bogies
- are wider (the 4D is broad gauge). I have travelled many times in the 4D
- and I cannot remember a squeal or a vibration. If the bogies are based on
- the same design then The Met is going to have problems.
-
- David Bromage
-