| Author | Message | ||
| mark (Coolbus)
Registered Member Username: Coolbus Post Number: 14 Registered: 7-2006 Posted From: 71.1.130.241 Rating: N/A |
Hello I would like to know more about this 'thingy' (the emergency shut off solonoid) The seller of the bus emailed me the following: "The emergency shut off solenoid is bad, which means that the air vent in the turbo was shut and the normal amount of air wasn't getting to the engine (blows black smoke), but I ordered a new one today and I opened the valve and everything is back to normal and running fine. It can run without the solenoid without any problems, its just that it won't shut the valve if you hit the switch from inside if its not working. It just took me awhile to figure it out." Is there some reason that the valve would be shut other than the solnoid going bad? I haven't asked the seller directly. Just concerned that theere may be some other reason that it went closed, allowing the bus to run, albiet with a lot of black smoke as he stated. Any opinions? or concerns? thanks very much Mark | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 297 Registered: 10-2003 Posted From: 69.162.3.30 Rating: |
The solenoid retracts a pin with a rounded end which allows the air flap at the blower inlet to close, choking off the air to the engine. Won't hurt that the solenoid is temporarily inoperative unless the engine needs to be shut down in an emergency , such as a run away engine or the normal shut down system quits.You should get it repaired asap. Could be a bad solenoid, no voltage to the solenoid, frozen flap, dirty switch or dirty or bad relay. Sometimes the switches act up because they rarely get used. | ||
| bernie newcomb (Newk)
Registered Member Username: Newk Post Number: 1 Registered: 9-2006 Posted From: 152.163.100.138 Rating: N/A |
the shut off that was in my truck would close if you hit a big bump in the road. the flapper may not cover the blower opening enough to stop the engine. i had that problem on the same truck good luck Bernie | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 298 Registered: 10-2003 Posted From: 69.162.3.30 Rating: N/A |
the ones that I,ve seen operate don't kill the engine, but only let it operate at more than low speed or higher that idle with a lot of black smoke, otherwise might damage blower seals ( speculation about the blower seals) | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 886 Registered: 12-2000 Posted From: 65.95.218.72 Rating: N/A |
Hello Mark. Above postings are good. The solenoid's job is to pull the catch on the hold open mechanism for the air flap. Failure of the solenoid would not affect regular engine running. The air flap may or may not completely stall the engine. Depends how tightly it happens to close, whether it is completely flat, etc. I would only use the emergency shut down to catch a run away engine, or to test that it will pull the catch. Tripping the flap does put some suction on the blower seals, which may or may not cause problems. Everyone should know where to put their finger to pull the fuel shut-off linkage, if the regular engine shut down mechanism fails. Remember, you have to have air pressure to get the engine to shut down. In order to help those who may not know, does anyone have pics? Or do I go for another documentary colaboration with Brian B? happy coaching! buswarrior | ||
| christopher l cole sr. (Muziklvr)
Registered Member Username: Muziklvr Post Number: 24 Registered: 7-2006 Posted From: 68.119.228.79 Rating: N/A |
i didn't know that a 4104 came with a 671(turbo)? if so, what yrs.? | ||
| Jim The ExtremeFamily (Skyslayer)
Registered Member Username: Skyslayer Post Number: 22 Registered: 11-2004 Posted From: 71.116.120.217 Rating: N/A |
fuel shut-off linkage in a 4106 8V71 Emergency shut off in a 4106 8V71 | ||
| Jim The ExtremeFamily (Skyslayer)
Registered Member Username: Skyslayer Post Number: 23 Registered: 11-2004 Posted From: 71.116.120.217 Rating: N/A |
Hmm I had posted two pictures any ideas why there are not here Ill try again | ||
| Jim The ExtremeFamily (Skyslayer)
Registered Member Username: Skyslayer Post Number: 24 Registered: 11-2004 Posted From: 71.116.120.217 Rating: N/A |
Ah I see they need to be smaller than 30k ok fuel shut-off linkage in a 4106 8V71 | ||
| Jim The ExtremeFamily (Skyslayer)
Registered Member Username: Skyslayer Post Number: 25 Registered: 11-2004 Posted From: 71.116.120.217 Rating: N/A |
Emergency shut off in a 4106 8V71 Emergency shut off in a 4106 8V71  | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 183 Registered: 11-2005 Posted From: 63.97.117.49 Rating: N/A |
Although he didn't say so here he posted on the other board and this is a 4104 w/6-71, nothing like the 8V-71. | ||
| Jim The ExtremeFamily (Skyslayer)
Registered Member Username: Skyslayer Post Number: 26 Registered: 11-2004 Posted From: 71.116.120.217 Rating: N/A |
I am curious where did it say they were working on a 6-71 Sorry Thanks Jim and The ExtremeFamily | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 302 Registered: 10-2003 Posted From: 69.162.3.30 Rating: N/A |
He posted the same question on the MAC board and mentioned there that it was a 4104 | ||
| DMDave Unregistered guest Posted From: 71.125.9.62 Rating: N/A |
Nice pic post Jim. Our 4-71 has a simular solonoid for the E-shutoff. | ||
| mark (Coolbus)
Registered Member Username: Coolbus Post Number: 15 Registered: 7-2006 Posted From: 65.40.227.162 Rating: N/A |
thanks for all the replies Christopher, the seller has told me that it was upgraded to have the turbo, but as others have mentioned, he may be mistaken the blower for a turbo. (?) thanks again Mark |
