Broken Down on Freeway Need Help!!!!

69M4107 · December 17, 2019, 06:28:40 AM

I have a shift lever.

richard5933 · December 17, 2019, 06:31:16 AM

Here's a photo of the top of the governor on my 4108. It's not exactly the same as yours, but the relevant bits are really close.

To shut down the engine, there is an air solenoid which sends air to the engine stop air cylinder. It will then extend and push the stop lever.

69M4107 · December 17, 2019, 06:47:52 AM

Got it. Mine is similar!

luvrbus · December 17, 2019, 08:35:23 AM

Dominic you can get about all the info you need if not here on Vintage Bus Repair or the 4106 group .I add a starter button to all GM because the rear start always seems to be a problem along with front

you can buy a remote starter switch from parts houses (2 wires clip on) ) that will help you a lot being able to bypass the OEM system those old engines are real simple to make run.
Bypass the starter buttons if it spins and no start that is a different game could be the safety shut down is not resetting and those are easy to bypass too let us know,if the engines spins over we can get you started and to a warmer place.The 4107 never came with a 8v71TA that was added and most likely the starter circuit has been modified to

69M4107 · December 17, 2019, 09:00:19 AM

So I have been all over that group and no one had the 4107 manual but I think I got everything I need for the time being from Ruchard. My flight just landed in Yakima, going to retrieve my tools and catch a ride down to the ole girl. She needs to come home to the heated shop that I just built just for her!

luvrbus · December 17, 2019, 09:11:37 AM

Your bus has been modified no telling what you find $:-\$ but if spins we can get it running

chessie4905 · December 17, 2019, 10:21:37 AM

Please make sure you have good charged batteries. No need to burn up the starter in the process, due to weak batteries and cold temps. 22° doesn't help any.

69M4107 · December 18, 2019, 02:40:29 PM

So I finally got down to the bus, I have charcoal going under the oil pan to warm it up, the batteries are reading full and I'm about to rewire the solenoid. Can anyone tell me how many wires should be on each solenoid post?

luvrbus · December 18, 2019, 03:00:18 PM

You have the positive cable,a small hot wire at the bottom and a small ground on the solenoid at the bottom also grounded to the starter that is all, the start wire (button or key) will be marked "S" and the ground will be marked "G"

richard5933 · December 18, 2019, 03:27:32 PM

Before you rewire, have you confirmed that the ground is good?

69M4107 · December 18, 2019, 03:52:32 PM

I was just going to run a ground wire to the frame.

richard5933 · December 18, 2019, 04:00:02 PM

That will work - just make sure that the ground from battery to chassis is good, as well as the one from the engine to chassis. They can be rotted on the inside but look good on the outside, so give them a tug to be sure. Wouldn't hurt to check the connecting bolts on those cable for corrosion and such. I'm gonna guess that a huge percentage of all electrical problems on the older GM buses can be traced back to a ground problem.

luvrbus · December 18, 2019, 04:07:47 PM

Your starter has a ground lug for that wire with the ground for the starter keep it as close to OEM as you can is the way I would do it .On GM's I run the ground from the battery direct to the starter then to the frame,the connector at the bulk head always seems to be a problem on GM buses

69M4107 · December 18, 2019, 05:10:49 PM

Thanks, I'll do that. I'm praying that's it.

69M4107 · December 18, 2019, 08:08:55 PM

I'm about done guys. It's too cold and I'm getting nowhere. Is it possible to tow my bus with the rear wheels on the ground without doing damage to the transmission?