It is currently Sat Nov 25, 2017 1:31 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: oil weight
PostPosted: Tue Aug 25, 1998 2:16 pm 

Interested to know what type or what weight oil would be used in a railroad diesel locomotive. Is there different weights for different types of engines. An Alco S2 or S4? I was told a straight 40 weight. Is this true? <br>



gecklev@wcoil.com


  
 
 Post subject: Re: oil weight
PostPosted: Tue Aug 25, 1998 4:10 pm 

That's what we used to use on our GP-7, and it is what EMD used to reccommend. I have seen some special oil formulations just for locomotive engines, which make a point to note that they are zinc free. I don't know what zinc in the oil does to the engine, but since the bearings are babbitt lined which is a zinc alloy, I wonder what it could hurt. I speculate that the zinc in the oil throws off the oil analysis and may lead the mechanics to believe the bearings are wearing away abnormally because of the zinc concentrations.<p>Again, just speculation.<p><br><br>



milw97a@aol.com


  
 
 Post subject: Re: oil weight
PostPosted: Tue Aug 25, 1998 5:34 pm 

Zinc-free railroad diesel engine oils are needed with EMD engines, many of which have silver-plated connecting rod wrist pins, and some of which have silver-plated turbocharger bearing components. The zinc additive is harmful to the silver plating.<p>Rather than use one oil in one manufactuer's locomotive and another in a second brand of locomotive, it is simply easier to use a zinc-free engine oil.<p>The traditional 40 weight oils are still very commonly used, but multi-grade railroad diesel oils are becoming very popular, particularly with the newer power.<p>Most of the railroad diesel engine oil suppliers have extensive technical information available, explaining things like the different additive packages they use, etc. Like many things, asking a few questions and studying the tech literature will provide a lot of knowledge.<p>One other point-- it is not a good idea to mix different brands of rr diesel engine oil, because different additive packages may react to form excess sludging in the engine. <br>


  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 5 hours [ DST ]


 Who is online

Users browsing this forum: Bing [Bot], Google [Bot], Yahoo [Bot] and 30 guests


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 post attachments in this forum

Search for:
Jump to: