SVR-Online Forum Forum Index SVR-Online Forum
The forum is run on a voluntary basis for members, volunteers and SVR enthusiasts.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Clicking locos

 
Post new topic   Reply to topic    SVR-Online Forum Forum Index -> Motive Power - Diesel
View previous topic :: View next topic  
Author Message
Joe2027



Joined: 22 Jun 2007
Posts: 691
Location: Wednesfield

PostPosted: Sat May 23, 2015 8:42 pm    Post subject: Clicking locos Reply with quote

I was at BN, the class 20's engine was switched off, and I heard lots of clicking. I've heard it on other diesel locos when the engine is switched off. What's the clicking noise?
Back to top
View user's profile Send private message
Derby4



Joined: 21 Mar 2009
Posts: 1748

PostPosted: Sun May 24, 2015 11:55 am    Post subject: Reply with quote

The 73 did it a couple of times yesterday as I passed by. I wonder if it is possibly residual pressure in the air-brake system slowly bleeding away?
Back to top
View user's profile Send private message
KJEvans



Joined: 08 Feb 2010
Posts: 1245
Location: Kidderminster or Edinburgh

PostPosted: Sun May 24, 2015 2:32 pm    Post subject: Reply with quote

I seem to recall hearing it is the air brakes leaking off (the sound is to me a cross between clicking and popping)
_________________
Kieren, Kidderminster Station Staff and TTI

GWR=Gresley Was Right...to learn from the Great Western
Back to top
View user's profile Send private message
Hoovers-rock



Joined: 18 Jul 2006
Posts: 379
Location: Kidderminster Yard.

PostPosted: Sun May 24, 2015 3:31 pm    Post subject: Reply with quote

I believe the sound you are all referring to is the Spyrax valves in the braking system; they are designed to release water and any dust from the system in the various low points in the pipework. They will "pop" at anything above 5psi if I remember correctly, but you normally cannot hear them over the locomotive when the loco is running as normal.
_________________
George Hill - All opinions are my own.
Back to top
View user's profile Send private message MSN Messenger
d431hood



Joined: 22 Jul 2007
Posts: 189
Location: Cambs

PostPosted: Wed May 27, 2015 11:41 am    Post subject: Reply with quote

Correct George. Keeps the build up of condensation in the air system to manageable levels.
_________________
Joe Burr
SVR Member & Shareholder
C50A Occasional Working Volunteer
Fifty Fund Chairman, Sales Officer & Deputy Under Webmaster
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    SVR-Online Forum Forum Index -> Motive Power - Diesel All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group