| Author | Message | ||
| thomas flocks (Taflocks)
Registered Member Username: Taflocks Post Number: 67 Registered: 9-2009 Posted From: 69.205.11.117 Rating: N/A |
i have the original switches on my 4106 and would like a new housing and new switches,is there anyone that makes a new switch panel for the 4106? maybe a lighted rocker panel type? with a key switch. also what is the emerg stop button for?i was started today and decided to try it out and nothing happend??? | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1748 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
The emergency stop button is to shut off the engine in an emergency, like a runaway engine. It releases a flap in the intake air passage pipe that goes between air cleaner and blower. The flap shuts off about 95 percent of the air going into engine, causing it to stop or drop down to idle with a great deal of black smoke. It is manually reset to it's open condition (while engine is off) and after problem is corrected. It sounds like it may not be working; this should be repaired at your earliest convenience. I think R and M fiberglass makes custom dash panels for many coaches. You can check their site. | ||
| John and Barb Tesser (Bigrigger)
Registered Member Username: Bigrigger Post Number: 290 Registered: 9-2007 Posted From: 24.183.21.246  Rating: N/A |
Emergency stop on a Detroit is a fail safe for a runaway engine. It is supposed to drop a flap across the air intake making the engine inoperable. That flap then needs to be reset by hand before the engine can be started again. I sure someone will have a much more involved explanation, but thats my basic understanding. LOL you beat me by a minute John! (Message edited by bigrigger on November 10, 2009) | ||
| thomas flocks (Taflocks)
Registered Member Username: Taflocks Post Number: 68 Registered: 9-2009 Posted From: 69.205.11.117 Rating: N/A |
it may have a broken wire or was removed by the p/o? | ||
| Ken Barnett (Dieselbusparts)
Registered Member Username: Dieselbusparts Post Number: 6 Registered: 7-2009 Posted From: 76.26.111.30 Rating: |
This is the panel that Mr. Roan had suggested: http://www.rm-fiberglass.com/bus/parts/102-45.html | ||
| thomas flocks (Taflocks)
Registered Member Username: Taflocks Post Number: 69 Registered: 9-2009 Posted From: 69.205.11.117 Rating: N/A |
dosent really float my boat.... i was looking for the panel on the left with the starter lights and fan switches. | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 996 Registered: 10-2006 Posted From: 69.19.14.44  Rating: N/A |
The switches on a Sportscar may be subject to water from a window leak or open toll hole. MY way was to replace the std. switches with marine grade Cole Hersey switches. Better Sealed and silver contacts. Check Defender industries in Ct for fair prices. Not expensive and easy (R&R) to do. FF | ||
| Rob Norgren (Robsedona)
Registered Member Username: Robsedona Post Number: 172 Registered: 11-2007 Posted From: 75.211.63.16  Rating: N/A |
DD in an article said to disable the stop switch and something about a fuel shut off switch. When the flapper closes it can blow the seals and suck oil from the engine and run on the oil until BAMB! If you have a Skinner valve in the fuel line you can use the emergency stop to shut off fuel to the engine! Just what I've been told By DD people who knew way more then ME Rob | ||
| Wec4104 (Wec4104)
Registered Member Username: Wec4104 Post Number: 72 Registered: 7-2008 Posted From: 71.59.85.113 Rating: N/A |
Yes, it was common for bus operators to disconnect the emergency stop switch. I can think of two reasons why it probably caused a lot of grief and aggravation. First, if the switch is ever triggered while parked, there is no clue to tell the next driver that the flap was left in the activated position. A newbie could waste a lot of time headscratching. Second, the toggle switch looks just like all the other toggle switches and it would be way to easy to flip it when reaching for another switch. I have personally experienced the joy of a run away DD while driving down the PA Turnpike (stuck injector). At the time, my emergency shutdown switch was disconnected, and I was wishing it was not. I have since reconnected it and have installed a switch cover/guard over it that you can buy at autoparts stores. Activating the switch is not a two step process whereby I flip open the cover and then can throw the toggle switch. I painted the cover to match the dash. I don't disagree that the skinner valve to cut off the fuel feed is a better solution. But I at least like the option of having the emergency switch available if needed. (Message edited by wec4104 on November 11, 2009) | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 1038 Registered: 11-2005 Posted From: 209.142.172.136  Rating: N/A |
I, too, have covered my emergency stop switch with a guard so that it has to be a determined effort to use it. I really don't worry about blown blower seals if I have a real emergency. Compared to a real runaway DD seals are a minor annoyance!! | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 1740 Registered: 12-2000 Posted From: 76.69.140.208  Rating: N/A |
Every coach I have ever driven that had an emergency stop switch, the switch had a cover on it. someone taking souvenirs off yours before you got it? happy coaching! buswarrior | ||
| Bill Holstein (Billmoocow)
Registered Member Username: Billmoocow Post Number: 39 Registered: 5-2009 Posted From: 98.232.207.25 Rating: N/A |
When i first got my bus the flap was wired open as they did not want it to ever be used?! I have since taken the wire off so that it can be used. Unfortunately it still does not work. Need to run some more tests to see why it does not engage. | ||
| Wec4104 (Wec4104)
Registered Member Username: Wec4104 Post Number: 73 Registered: 7-2008 Posted From: 71.59.85.113 Rating: N/A |
Buswarrior: I can't speak for the other coaches you have driven, but I don't think 4104s originally came with covers over the emergency stop switch. The manuals I have include photos of the dash, and in none of these is there a switch cover. Given the similarity of the 4106 dash, I'd say there is a very good chance these came without the cover also. | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 664 Registered: 3-2007 Posted From: 71.53.155.14  Rating: N/A |
Wec; My 1957 4104 Gm has the emergency stop switch on the dash with the cover over it also. I have made sure it works and since looking at this thread, I am putting a fuel shut-down solonoid on it as well so when you hit the emergency switch it activates Both. Gomer | ||
| Jim Wilke (Jim Bob) (Pd41044039)
Registered Member Username: Pd41044039 Post Number: 414 Registered: 2-2001 Posted From: 184.0.7.177 Rating: |
When we got our 4104, the flap was wired open and the switch had a red guard you have to flip out of the way. Turns out it was wired because the notch on the cam was worn & it would jiggle & apply itself going down the road! I disassembled the flap & cam (it was real stiff from being wired open) and repaired the worn part (I reground the worn edge to be a sharper corner to match the unworn section) I haven't had a bit of trouble since. The fuel solenoid is good, but if your engine ever runs away, it will run way longer than you want to be there waiting for it to run out of fuel (it could take 5 minutes) while it screams at maybe 3000 rpms. And if it starts to run on it's own oil, the fuel solenoid won't stop it. Later mechanical engines have spring loaded rack arms so if one injector stuck, the rack can still close. That's why they stopped using the flap. | ||
| John and Barb Tesser (Bigrigger)
Registered Member Username: Bigrigger Post Number: 292 Registered: 9-2007 Posted From: 24.183.21.246 Rating: N/A |
They also told me with my GMC that had oil bath air cleaners that in the event of a roll over the oil in the air cleaner would be sucked in and cause a runaway engine. I guess if my semi was laying on its top, the engine racing would not be my main concern! | ||
| George M. Todd (George_mc6)
Registered Member Username: George_mc6 Post Number: 924 Registered: 8-2006 Posted From: 99.39.13.151 Rating: N/A |
I really agree with Jim! The engine can indeed run away because of a stuck injector, but also from being in a combustible atmosphere. (A gasoline or natural or propane gas leak.) The Dodge owners manual states that to stop a runaway engine, shoot a CO2 type fire extinguisher under the right fender where the air intake is. Under these circumstances, a fuel shut off solenoid won't do any good, and we have to remember that any time the engine is turning faster than the throttle is asking, that the governor will have the rack in the no-fuel position if the rack isn't stuck. G |
