Citaro Posted July 12, 2014 Report Share Posted July 12, 2014 Pretty sure you're right as you're even taking an air brake class but I guess it makes sense, since I would only hear this during the hot days and not in the middle of winter. Taking a two-day course doesn't make me an expert, but thank you for your willingness to consider my theory. I may be even further off-base with this second perspective, but another possibility I was just thinking of is that the air reservoirs have accumulated too much water. Air brake systems are designed to limit the amount of moisture that reaches the reservoirs, but a little bit of water and dust is always able to pass through; I could see how humid weather would result in more of this type of contamination in an air brake system (it's suggested that reservoirs be drained daily, but who knows how often CMBC does this on their buses). I don't know what water sounds like in a compressed air tank, but maybe this is it(?). Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 12, 2014 Report Share Posted July 12, 2014 Taking a two-day course doesn't make me an expert, but thank you for your willingness to consider my theory. I may be even further off-base with this second perspective, but another possibility I was just thinking of is that the air reservoirs have accumulated too much water. Air brake systems are designed to limit the amount of moisture that reaches the reservoirs, but a little bit of water and dust is always able to pass through; I could see how humid weather would result in more of this type of contamination in an air brake system (it's suggested that reservoirs be drained daily, but who knows how often CMBC does this on their buses). I don't know what water sounds like in a compressed air tank, but maybe this is it(?). Well it's better than not taking it, I thought it was just some loose nuts n bolts. I'm learning something new, where are the reservoirs in the brake system ? Also I doubt Translink would care about that, as long as the bus is running they could careless. Link to comment Share on other sites More sharing options...
translink Posted July 12, 2014 Report Share Posted July 12, 2014 Taking a two-day course doesn't make me an expert, but thank you for your willingness to consider my theory. I may be even further off-base with this second perspective, but another possibility I was just thinking of is that the air reservoirs have accumulated too much water. Air brake systems are designed to limit the amount of moisture that reaches the reservoirs, but a little bit of water and dust is always able to pass through; I could see how humid weather would result in more of this type of contamination in an air brake system (it's suggested that reservoirs be drained daily, but who knows how often CMBC does this on their buses). I don't know what water sounds like in a compressed air tank, but maybe this is it(?). You're correct on all fronts. I "think" you're supposed to clear it once a day, every day. Water escaping an air tank sounds just like Ninja's video, the pitch depends on the size of the air tank. Its why its louder on a D40LF, then it is on a D60LF. Also, NovaBuses suffer from the same issue the only difference is the fact that its hidden in the engine compartment. Directly behind the center seat at the very back. On New Flyer buses, its mounted directly behind the last curb side seat on the right hand corner of the bus. Link to comment Share on other sites More sharing options...
captaintrolley Posted July 12, 2014 Report Share Posted July 12, 2014 On the New Flyers I think there is a small compartment door that is labelled Air Tank. Link to comment Share on other sites More sharing options...
Citaro Posted July 12, 2014 Report Share Posted July 12, 2014 Well it's better than not taking it, I thought it was just some loose nuts n bolts. I'm learning something new, where are the reservoirs in the brake system ? Also I doubt Translink would care about that, as long as the bus is running they could careless. You're correct on all fronts. I "think" you're supposed to clear it once a day, every day. Water escaping an air tank sounds just like Ninja's video, the pitch depends on the size of the air tank. Its why its louder on a D40LF, then it is on a D60LF. Also, NovaBuses suffer from the same issue the only difference is the fact that its hidden in the engine compartment. Directly behind the center seat at the very back. On New Flyer buses, its mounted directly behind the last curb side seat on the right hand corner of the bus. Kafi: CMBC definitely drains the tanks on their buses; they would cease to work it this duty was neglected and such inaction would likely cause a lot of costly damage if the contamination were to spread beyond the reservoir (note that it's not just water in there, the water mixes with other contaminants such as dust to create sludge). My question pertains to how often the tanks are drained. I've seen buses getting serviced overnight on numerous occasions and I have never seen the service persons tend to the tanks, which of course does not mean it doesn't happen, but rather that it probably isn't part of their overnight routine. Bryan: Cool, glad we agree. Just to be clear and specific (since Kafi asked), the tanks are located below the ceiling, namely behind the ad-racks. Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 12, 2014 Report Share Posted July 12, 2014 Kafi: CMBC definitely drains the tanks on their buses; they would cease to work it this duty was neglected and such inaction would likely cause a lot of costly damage if the contamination were to spread beyond the reservoir (note that it's not just water in there, the water mixes with other contaminants such as dust to create sludge). My question pertains to how often the tanks are drained. I've seen buses getting serviced overnight on numerous occasions and I have never seen the service persons tend to the tanks, which of course does not mean it doesn't happen, but rather that it probably isn't part of their overnight routine. Bryan: Cool, glad we agree. Just to be clear and specific (since Kafi asked), the tanks are located below the ceiling, namely behind the ad-racks. I see your point now, these tanks have to be drained or else stuff will build up in there and cause mechanical issues. Maybe they drain the tanks once every few days ? Link to comment Share on other sites More sharing options...
captaintrolley Posted July 12, 2014 Report Share Posted July 12, 2014 I imagine each bus has a service log so things are done on a consistent basis. Link to comment Share on other sites More sharing options...
Brando737 Posted July 14, 2014 Report Share Posted July 14, 2014 I don't know when the air tanks are drained completely by the valve from the tank itself, but a full airbrake test cycle is done everyday on every bus before it leaves the yard which includes applying the service brake until the reservoir is completely drained. Obviously if the bus is in for maintenance or not booked out, the air test isn't done. Also, the air tanks will drain on thier own if sitting for a long period of time, I think it's an automatic purge or something like that. Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 16, 2014 Report Share Posted July 16, 2014 I was at Braid Stn today and spotted P7431 with it's destination sign reading " DDR VEHICLE ". What does that mean. Link to comment Share on other sites More sharing options...
Citaro Posted July 16, 2014 Report Share Posted July 16, 2014 I was at Braid Stn today and spotted P7431 with it's destination sign reading " DDR VEHICLE ". What does that mean. Designated Disaster Response Vehicle. Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 16, 2014 Report Share Posted July 16, 2014 Designated Disaster Response Vehicle. Thanks, so that means during some kind of disaster people can board that bus ? Link to comment Share on other sites More sharing options...
Orion P9217 Posted July 16, 2014 Report Share Posted July 16, 2014 technically yes but also means Dance Dance Revolution Vehicle. Link to comment Share on other sites More sharing options...
Citaro Posted July 16, 2014 Report Share Posted July 16, 2014 Thanks, so that means during some kind of disaster people can board that bus ? Yes, they can be used for a variety of purposes (e.g. provide shelter, transport people to safety, be used to set up a triage area on board, et cetera). technically yes but also means Dance Dance Revolution Vehicle. Good to know. Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 16, 2014 Report Share Posted July 16, 2014 Yes, they can be used for a variety of purposes (e.g. provide shelter, transport people to safety, be used to set up a triage area on board, et cetera). I see, thanks. Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 18, 2014 Report Share Posted July 18, 2014 I've noticed that some D60LF's have this and what is it ? Link to comment Share on other sites More sharing options...
East Van Fan Posted July 18, 2014 Report Share Posted July 18, 2014 hmm... I'm not 100% accurate but back before the Canada Line opened, all buses (R8057-R8084) are equipped with a GPS system and stop request announcement. for the 98 B-Line route, a first in Translink's history. Link to comment Share on other sites More sharing options...
Citaro Posted July 19, 2014 Report Share Posted July 19, 2014 hmm... I'm not 100% accurate but back before the Canada Line opened, all buses (R8057-R8084) are equipped with a GPS system and stop request announcement. for the 98 B-Line route, a first in Translink's history. I am doubtful. I believe that the computer for this was located in the same place then as it is today, behind the operator. I also believe that the object in question is a transponder to keep traffic lights green until the bus has made it through (but I am not completely sure). Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 19, 2014 Report Share Posted July 19, 2014 I am doubtful. I believe that the computer for this was located in the same place then as it is today, behind the operator. I also believe that the object in question is a transponder to keep traffic lights green until the bus has made it through (but I am not completely sure). It could be since we did go through a lot of green lights and rarely stopped at red lights along 41st Ave. Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 22, 2014 Report Share Posted July 22, 2014 Sorry again, but with the skytrain tracks, which track is the one that will electrocute you ? Link to comment Share on other sites More sharing options...
Citaro Posted July 23, 2014 Report Share Posted July 23, 2014 Sorry again, but with the skytrain tracks, which track is the one that will electrocute you ? The power rails are the two strips mounted on the side of the guideway. Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 23, 2014 Report Share Posted July 23, 2014 The power rails are the two strips mounted on the side of the guideway. So those are the rails that will kill you ? Then whats that metal one in between the tracks. Link to comment Share on other sites More sharing options...
Dennis Posted July 23, 2014 Report Share Posted July 23, 2014 Then whats that metal one in between the tracks. The LIM rail for movement. http://www.explainthatstuff.com/linearmotor.html Link to comment Share on other sites More sharing options...
Ninja Bus Fan Posted July 23, 2014 Report Share Posted July 23, 2014 The LIM rail for movement. http://www.explainthatstuff.com/linearmotor.html So if I touch that, I won't get electrocuted ? And, thanks. Link to comment Share on other sites More sharing options...
captaintrolley Posted July 23, 2014 Report Share Posted July 23, 2014 Then whats that metal one in between the tracks. I thought that metal 'wire' in the center (between the rails) was for communication. Link to comment Share on other sites More sharing options...
Dennis Posted July 23, 2014 Report Share Posted July 23, 2014 So if I touch that, I won't get electrocuted ? And, thanks. No, unless you are touching the power rail or some other source at the same time. I thought that metal 'wire' in the center (between the rails) was for communication. The two cables that run on either side of the LIM rail are the communication loops. Link to comment Share on other sites More sharing options...
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