Mystery Schreider valve

richard5933 · September 29, 2018, 03:48:09 PM

Any one know what this Schreider valve is for? Thought it might be a remote fill for the spare, but there was no hose on the other side.

chessie4905 · September 29, 2018, 05:40:10 PM

That is exactly what mine looked like. Happens when someone pulls out spare without disconnecting first. I considered replacing mine, but I have hoses in coach so I can fill it if I need it and it is low.

buswarrior · September 29, 2018, 05:58:05 PM

First time someone had to pull that spare out, good bye nice little hose... never to be seen again.

Can't do a proper inspection with the spare in there anyway.

Looked good on a drawing board, the fleet made a running change...

Happy coaching!
Buswarrior

richard5933 · September 29, 2018, 06:24:12 PM

Thanks for the confirmation.

I was actually thinking of getting a 7th tire monitor to put on the spare. Not sure if the monitor would read it through the body, but since it's just below where I keep the monitor I thought it was worth a try. Would at least give me a general idea of the air in the spare without having to drop the bumper each time.

richard5933 · October 05, 2018, 04:44:23 AM

I received the extra single stem sensor from TireMinder yesterday. Spent an hour wrestling that beast of a spare out of its cubby hole. Topped off the air in the tire and installed the sensor. Spent another hour wrestling that monster back in place and closing up the bumper.

Yes - I did remember to activate the sensor before closing up the bumper.

I'm not fully convinced that the sensor will read at all times though. I've got the booster for the tire sensors mounted in the rear of the bus per instructions. It sends the signal to the monitor which is mounted on the dash. This new sensor is just below the monitor in the spare tire compartment, but it does seem that having it totally wrapped by metal is interfering with the signal. the monitor can find it, but not steadily or at all times.

Once I get it on the road and can better see how it functions I'll report back. I suspect at worst I'll have to carry the monitor to the nose of the bus just outside the compartment to get a reading. At least then I'll be able to do a daily check on the spare without having to drag it out of the compartment. (It was not getting frequent inspections - maybe once a season at best prior to this.)

chessie4905 · October 05, 2018, 05:18:56 AM

I think having an onboard air hose and a couple of air line taps makes needing that spare sensor unnecessary. I have an air line connection off the under driver's compartment tank and one off the air line back by engine. I have a shutoff valve for both besides, as those quick connects can leak when o- rings leak. Also, makes it easier to connect and disconnect 1/2" air line for 1" impact wrench by bleeding off pressure at disconnect first.
Richard, if your spare is flat, it should be easier to handle without the 110 lbs of air......

If you have signal sensor problem, you can have a new hose made up to monitor and refill spare and screw sensor on the end under driver.

windtrader · October 05, 2018, 07:11:33 AM

Richard, this is going OT but the TireMinder sensors broadcast while turning and the signal bounces off the road and gets more easily picked up by the receiver/bluetooth radio. If the tire is stored inside a metal housing at the front of the bus, it might not get picked up very well especially if the booster is at the back of the bus. The reason it is recommended there is so the toad sensors are easier to read.

richard5933 · October 05, 2018, 08:53:52 AM

Quote from: chessie4905 on October 05, 2018, 05:18:56 AM
I think having an onboard air hose and a couple of air line taps makes needing that spare sensor unnecessary....

If you have signal sensor problem, you can have a new hose made up to monitor and refill spare and screw sensor on the end under driver.

Maybe so - I have onboard hose and fittings, but prefer to also have the inflated spare. Maybe it's just because I've always had an inflated spare in every vehicle I've ever driven, maybe it's because I like to hedge my bets, but I do prefer to have the inflated spare ready to go.

Quote from: windtrader on October 05, 2018, 07:11:33 AM
Richard, this is going OT but the TireMinder sensors broadcast while turning and the signal bounces off the road and gets more easily picked up by the receiver/bluetooth radio. If the tire is stored inside a metal housing at the front of the bus, it might not get picked up very well especially if the booster is at the back of the bus. The reason it is recommended there is so the toad sensors are easier to read.

Right now it's reading most of the time. If I notice a problem I might do like chessie4905 suggests and add a remote hose to the spare again.

windtrader · October 05, 2018, 06:41:47 PM

Richard, It seems like overkill to have real time monitoring for the spare. In fact, having it report all the time seems more a distraction than it is worth. There is an option for the display to scroll through the sensors. If you need to use the spare, just air it up if it needs it then.

richard5933 · October 05, 2018, 06:53:49 PM

Quote from: windtrader on October 05, 2018, 06:41:47 PM
Richard, It seems like overkill to have real time monitoring for the spare. In fact, having it report all the time seems more a distraction than it is worth. There is an option for the display to scroll through the sensors. If you need to use the spare, just air it up if it needs it then.

I check the monitor at the start of the day by forcing it into a refresh to be sure that it finds all the tires. Then it goes silent and I ignore it for the rest of the day. The only time it lights up, makes a noise, or otherwise requires attention is if there is a problem.

That said, I haven't found a was for the display to scroll through the sensors automatically. Is this the TireMinder you're talking about?

windtrader · October 05, 2018, 07:05:21 PM

I bought the SmartTPMS version that provide graphical display via smartphone/tablet. For me, I like having it software driven as new features and options and mods can be pushed out anytime by Minder Research. I'm in the beta program now and feeding suggestions to them for better usability.

dtcerrato · October 05, 2018, 07:21:21 PM

Our 4104 spare tire compartment (behind the bumper) has a little slide door right up front underneath the spare for reading air direct from the spare schreider valve. Never thought it to be a priority with on board air anyway.

chessie4905 · October 05, 2018, 07:25:52 PM

Do you block it up before sliding under there to read tire pressure?
The compact spare in my 69 Nova was flat and had a bottle of compressed air to inflate it. I still have bottle with short hose. Maybe I should check if it is still holding pressure.lol

dtcerrato · October 06, 2018, 07:40:29 AM

Good question, I have to say that is one of the few areas that I check without blocking because my body doesn't go under - just my arm. Same as the wet tank drain. But normally the answer to your blocking question is absolutely! The bus has been on the pit for some months & is blocked to the hilt. Four different locations (between bumpers & air boxes, under bulkhead framing to floor, under drums, & bottle jackes in place) in case one fails, even though we're in the pit...

buswarrior · October 07, 2018, 05:58:27 PM

"Under drums"??

Don't hold the bus up by the drums, they need to stay round.

Under the axle.

Happy coaching!
Buswarrior