• Our new ticketing site is now live! Using either this or the original site (both powered by TrainSplit) helps support the running of the forum with every ticket purchase! Find out more and ask any questions/give us feedback in this thread!

Class 150 Driver training fault question

Status
Not open for further replies.
K

Killtrox

Member
Joined
5 Oct 2021
Messages
8
Location
Morpeth
Currently doing MDD training and we are learning about Train Wire 4 on the class 150.

We were given the following fault to figure as homework.

"TW4 Problem.

You are on a 150/1. You are unable to get brake release. You carry out your fault finding as we discussed and there are no visual indications of what could be the fault. You enter the rear cab and CAN get brake release. So you return to the leading cab and are still unable to get brake release. What is the fault?

It’s not the jumper cable."

At first I thought the EBS was lifted in the rear cab as the wording seemed the rear cab hadn't been checked yet but apparently its visual indications throughout the entire train.

Could it be a faulty DSD pedal in the leading cab ??
 
Sponsor Post - registered members do not see these adverts; click here to register, or click here to log in
R

RailUK Forums

T

ThePeakNed

Member
Joined
6 Dec 2021
Messages
207
Location
Salop
The fact the question has been focused solely around a scenario occurring in the front cab of a 150/1 (specifically) leads me to believe it’s MCB related, as I know there are certain conditions where you can’t get brake release in one end but can the other, based on a 150/1.

I’d take a guess at Train Control MCB has tripped.
 
K

Killtrox

Member
Joined
5 Oct 2021
Messages
8
Location
Morpeth
ThePeakNed said:
The fact the question has been focused solely around a scenario occurring in the front cab of a 150/1 (specifically) leads me to believe it’s MCB related, as I know there are certain conditions where you can’t get brake release in one end but can the other, based on a 150/1.

I’d take a guess at Train Control MCB has tripped.
Click to expand...
That would come under the visual indicators, which have all been checked/not showing signs of a fault which made me think EBS raised in rear cab as the wording suggested that cab hadn't been checked yet or a faulty DSD as that shouldn't affect the rear cab?
 
westcoaster

westcoaster

Established Member
Joined
4 Dec 2006
Messages
4,328
Location
DTOS A or B
Motor alternator !

Silent AWS/AWS fault

Been a long time since I signed sprinters
On 319's A, B,C MCB's

Alternator
Brake control
Control positive
 
Last edited:
G

GC class B1

Member
Joined
19 Jun 2021
Messages
454
Location
East midlands
I don’t know much about sprinters but from my limited knowledge could the fault be either the brake negative in the leading cab or end of train relay fault in the trailing cab.
 
S

skyhigh

Established Member
Joined
14 Sep 2014
Messages
6,362
AJB92 said:
And a coupling fault you wouldn’t get brake release in the other end because TW4 would be still broken because it would be looking for the other unit
Click to expand...
Precisely. Same as if you pressed couple while in neutral with no unit there. No brake release in either cab.
 
E

Efini92

Established Member
Joined
14 Dec 2016
Messages
2,000
Killtrox said:
Currently doing MDD training and we are learning about Train Wire 4 on the class 150.

We were given the following fault to figure as homework.

"TW4 Problem.

You are on a 150/1. You are unable to get brake release. You carry out your fault finding as we discussed and there are no visual indications of what could be the fault. You enter the rear cab and CAN get brake release. So you return to the leading cab and are still unable to get brake release. What is the fault?

It’s not the jumper cable."

At first I thought the EBS was lifted in the rear cab as the wording seemed the rear cab hadn't been checked yet but apparently its visual indications throughout the entire train.

Could it be a faulty DSD pedal in the leading cab ??
Click to expand...
Dsd or AWS mcb has tripped in that cab.
 
I

irish_rail

On Moderation
Joined
30 Oct 2013
Messages
4,294
Location
Plymouth
From my experience this is almost always a reverser fault. Playing around a bit with the F and R switch cures it.
 
E

Efini92

Established Member
Joined
14 Dec 2016
Messages
2,000
AJB92 said:
You’d know about an AWS MCB though, as the sunflower wouldn’t be illuminated, wouldn’t it?
Click to expand...
Yeah it would sound either. Plus the mcb tripping is a visual indication, doh.
It’s the DSD.
 
G

GC class B1

Member
Joined
19 Jun 2021
Messages
454
Location
East midlands
westcoaster said:
Motor alternator !

Silent AWS/AWS fault

Been a long time since I signed sprinters
On 319's A, B,C MCB's

Alternator
Brake control
Control positive
Click to expand...
Sprinters don’t have motor alternators. They have a 24volt DC control system. The AWS is 24 volt and the batteries are charged by an engine driven alternator similar to a car.

Although I am not knowledgeable in the electrical systems of sprinters, from my fault finding experience I can eliminate systems that are common to both cabs such as brake control units, door interlocks or passenger communication. The fault is likely to be with a component or wiring that is specific to one cab, probably the leading cab as the trailing cab seems to be operating normally. This could include the master controller, power brake controller or safety system.
 
Last edited:
L

LowLevel

Established Member
Joined
26 Oct 2013
Messages
8,223
Out of interest given the prevailing opinion is DSD, do the 150s have vigilance fitted which would make a fault of this sort more obvious or not?
 
S

skyhigh

Established Member
Joined
14 Sep 2014
Messages
6,362
LowLevel said:
Out of interest given the prevailing opinion is DSD, do the 150s have vigilance fitted which would make a fault of this sort more obvious or not?
Click to expand...
All /2s do, some /1s have been modified to have vigilance fitted.
 
S

sw1ller

Established Member
Joined
4 Jan 2013
Messages
1,567
Well, you had 60 seconds to work it out….. just call maintenance. The delay has to be attributed to someone. Don’t know why TOCs spend so much time on this then you don’t get the chance to sort it out yourself in the real world.
 
S

secretsquirels

On Moderation
Joined
23 Aug 2019
Messages
48
Location
Bodmin Parkway
Killtrox said:
Turns out the answer was faulty DSD
Click to expand...
Never in doubt

sw1ller said:
Well, you had 60 seconds to work it out….. just call maintenance. The delay has to be attributed to someone. Don’t know why TOCs spend so much time on this then you don’t get the chance to sort it out yourself in the real world.
Click to expand...
Call maintenance? When the person who asked the original question is training to be an MDD? So they’ll be ringing themselves then
 
L

LowLevel

Established Member
Joined
26 Oct 2013
Messages
8,223
AJB92 said:
Never in doubt


Call maintenance? When the person who asked the original question is training to be an MDD? So they’ll be ringing themselves then
Click to expand...
Depot drivers just drive the things surely, if they jack in transit Phone a Friend has to be the way to go :lol:
 
Status
Not open for further replies.

Top