R32 3838 Posted April 7, 2011 Share #1 Posted April 7, 2011 I was on this R142A on the 2 nights ago and I was done when I heard this, This is not the first one I heard that sounded like this: Part 1: Link to comment Share on other sites More sharing options...
4P3607 Posted April 8, 2011 Share #2 Posted April 8, 2011 Whoa... Thats amazing!!! Its kind of hard to hear in the beginning. I have heard this b4 too. Link to comment Share on other sites More sharing options...
Cait Sith Posted April 8, 2011 Share #3 Posted April 8, 2011 Nothing really that special, I caught a set on the just last week with bad bearings. Link to comment Share on other sites More sharing options...
R32 3838 Posted April 8, 2011 Author Share #4 Posted April 8, 2011 Yeah I rerember I grabbed one in the summer of 2009 that sounded like this one, But Yeah Its nothing special but you gotta admit this shit do sound good Link to comment Share on other sites More sharing options...
Queens Surface Posted April 8, 2011 Share #5 Posted April 8, 2011 mm those motors sound good! Link to comment Share on other sites More sharing options...
INDman Posted April 8, 2011 Share #6 Posted April 8, 2011 Nothing really that special, I caught a set on the just last week with bad bearings. Yep, that's exactly what causes that sound. There are a few R68s on the that are in worse shape that this. There is also a problem with the cars out of the Concourse, there journal boxes are leaking and drying out causing the cars to sound like R1s. Link to comment Share on other sites More sharing options...
R32 3838 Posted April 8, 2011 Author Share #7 Posted April 8, 2011 Part 1 is the 2nd video in the 1st post and I gotta take that R68 that sounds like an R1 Link to comment Share on other sites More sharing options...
TrainFanatic Posted April 8, 2011 Share #8 Posted April 8, 2011 What are "bearings"? Link to comment Share on other sites More sharing options...
INDman Posted April 8, 2011 Share #9 Posted April 8, 2011 What's "bearings"? It's where the axial and the truck meet. Under the right conditions, you can move a subway car by hand. I have done so with a pinch bar. With other types of bearings, there is more friction and they require frequent lubrication. Link to comment Share on other sites More sharing options...
'89 Liberty MCI Posted April 8, 2011 Share #10 Posted April 8, 2011 Bearings: The little metal spheres or cylinders roll around inside the rings to mitigate friction. Link to comment Share on other sites More sharing options...
Brighton Local Posted April 8, 2011 Share #11 Posted April 8, 2011 As a huge fan of the 68/68As, this was awesome to hear! :tup: Link to comment Share on other sites More sharing options...
SubwayGuy Posted April 8, 2011 Share #12 Posted April 8, 2011 I have done so with a pinch bar. And what a pain that is! Link to comment Share on other sites More sharing options...
SubwayGuy Posted April 8, 2011 Share #13 Posted April 8, 2011 It's where the axial and the truck meet. Under the right conditions, you can move a subway car by hand. I have done so with a pinch bar. With other types of bearings, there is more friction and they require frequent lubrication. Bearings: The little metal spheres or cylinders roll around inside the rings to mitigate friction. As INDman referenced, older bearings are "friction bearings" - what you've shown are "roller bearings" which are newer and easier maintained. Friction bearings the entire movement is "mitigated" as you say by grease. FRA rules dictate friction bearings must be moved very slowly, and inspected periodically for a "hot box" by measuring temperature of the bearing to make sure the friction is within prescribed limits and not causing an overheating condition. On subway routes, that's not necessary but friction bearings still require keeping an eye (and an ear on)...hot boxes can cause very serious axle and bearing problems if left unchecked. Roller bearings are less likely to develop those conditions but still need to be checked periodically Link to comment Share on other sites More sharing options...
INDman Posted April 8, 2011 Share #14 Posted April 8, 2011 And what a pain that is! Not when the car you moving has roller bearings, once you get it moving it's not bad, you just have to pray that you can stop it. Link to comment Share on other sites More sharing options...
4P3607 Posted April 8, 2011 Share #15 Posted April 8, 2011 What time did you take this? it looks like the middle of the night due to the scarcity of ppl... Link to comment Share on other sites More sharing options...
m7zanr160s Posted April 12, 2011 Share #16 Posted April 12, 2011 What time did you take this? it looks like the middle of the night due to the scarcity of ppl... I'd say... Grand Central, empty!? Can only be wee hours. Link to comment Share on other sites More sharing options...
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