| Author |
Message |
Ed-NJ (24.191.163.130)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 05, 2002 - 8:57 pm: | |
After moving my mc-9 and having the air system freeze up so as it would not build up any pressure, I could not shut down the engine. Due to lack of air. I did not want to shut off the fuel, so I let it run till it thawed.I would have liked to have shut down the motor instead of letting it run idling for two hours,unable to move it or shut it down.So my question how do you shut down a MC-9, 8v71 with no air pressure? |
Earl-8-Ky (209.42.182.148)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 05, 2002 - 9:20 pm: | |
There is a smallair cyl. on yop of the govennor box.It goes over to a lever about 2 or 2 1/2 inches long. Reach in and move the lever to the rear by hand. This will put it in the no fuel position and the engine will stop. |
ED-NJ (24.191.163.130)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 05, 2002 - 9:31 pm: | |
Sounds easy enough guess I'll have to find the govenor box... |
ED-NJ (24.191.163.130)
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Votes: 0 (Vote!) | | Posted on Thursday, December 05, 2002 - 9:39 pm: | |
I heard of a alcohol additive for the air system to remove water, where do you introduce it into the system? |
Darryl (68.114.35.227)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 05, 2002 - 10:37 pm: | |
It requires a special plumbed-in fixture that automatically introduces it into the sytem. However, your bus already has an air dryer on it from the factory. It may need servicing with new dessicant. The air dryers work well and rarely give a problem. If you've never serviced it, you may need to have it looked at. Since you already know your air system has water in it, you probably need to drain the air tanks by hand. They have a drain cock at the end of each air tank. With pressure on the system, turn the drain cock on each tank until moisture stops coming out.
This brings up another topic. Do not get under your bus (which is required to drain the tanks) unless it has jack stands or other substantial support in case the air goes down. Draining air tanks will surely hasten that process! Doing otherwise can kill you! The safest option is to do it over a pit. |
Jim Ashworth (Jimnh) (172.138.181.226)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 06, 2002 - 7:50 am: | |
It also sounds like the heater on the bottom of the air dryer is not working. This should have melted any ice, allowing the valve to close and turn on the compressor. Definitely time to dry the entire system.
Jim |
Geoff (Geoff) (64.1.0.122)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 06, 2002 - 8:25 am: | |
A word of warning: if you shut your engine down manually be careful you don't put your fingers where the plunger normally pushes-- shutting it down manually activates the low oil pressure safety shutdown so the plunger will pop out and pinch/trap your finger (ouch!). I realize if you don't have any air pressue to activate the shut down plunger this won't happen, but remember this tip in the future when you do have air pressure. |
ED-NJ (24.191.163.130)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 07, 2002 - 1:51 pm: | |
Thanks for the help guys |
Will MC-7 (12.162.39.178)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 07, 2002 - 9:19 pm: | |
I have an MCI with an 8v-71.
My emergency shut off does not need air.
It basically shuts off all the combustion air to the engine. It is activated by a switch from the dash; when you press the button it activates an electric solenoid that shuts off the air doors.
When I changed over from 24 volts to 12 volts I just bought a solenoid from a Delco starter and replaced it. Works great. |
Will MC-7 (12.162.39.178)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 07, 2002 - 9:23 pm: | |
Ed
I have an MCI with an 8v-71.
My emergency shut off does not use air.
It basically shuts off all the combustion air to the engine. It is activated by a switch from the dash; when you flip the switch it activates an electric solenoid that shuts off the combustion air to the engine.
When I changed over from 24 volts to 12 volts I just bought a solenoid from a Delco starter and replaced it. Works great. |
Pat Young (165.247.225.107)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 08, 2002 - 7:56 am: | |
Howdy
On every Detroit diesel I have worked on there are two shutoffs. the regular one you use daily just has a simple air cylinder, about 2/3 the size of a beer can, and it sits on top the injector pump. It's easy to find. Just have sombody sit in the drivers seat and push the kill button, and you will see it move. You can push it as many times as you want, with or withot the engine running. Then just duplicate with your hand what the little air cylinder does: push the lever on top of the pump until the engine stops running, Takes about 2 seconds.
The EMERGENCY stop on buses I've worked on is located in the air intake tubing. That tubing is usually 8-10 inches, looks like stovepiping and that's also the tubing plumbed into your air cleaner. This device is also tripped from the dash, and it puts a butterfly across the air intake tube, choking the engine of air and "strangling" it. If you hit this one, the engine will not restart until you it and put it back into the running position manually, It is spring loaded. But it's also real easy. Once again just have someone sit in the cab, and have them touch the emergency kill button, then you see this thing/gadget move about90 degress. Then just put it back into the orignal position.
See ya
pat Young
www.WheelchairProject.org |
Geno (205.188.209.11)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 28, 2002 - 2:26 pm: | |
Much thanks for these posts. Discovered that my emegency shut off switch does not work. Another good "To Fix" item for the top of the list. |