62 4000 Diesel Starter Solenoid

Rebuilt my injector pump (another post - another story) - waiting on one small piston that should arrive today. Hoping to finally verify the motor.

I have found that I can't trust anything done by the previous owner of this tractor. Right now I'm just trying to get the motor running/checked so I can swap it to my 62 2000.

This is the 62 4000 172 diesel with a SOS tranny
Repaired the starter.
Repaired the alternator.
Replaced cables with 1ga.
Replaced all other ignition wires with 10ga.

The cables were getting hot before the pump rebuild (haven't checked the again). I am questioning the solenoid (everything else was bad!). Not sure if it is the "right" one and it came to me mounted to the sheet metal - don't think that's a good ground.

If I replace the solenoid would I use a BWD #S103?
Where was this solenoid originally mounted?
 
Yeah! Well! As just discussed in another thread just seven below this one as I write, a '62 4000 diesel came from the factory with two solenoids. One of them was used to energize the glow plugs. It was "sheet metal" mounted.The starter solenoid is mounted inboard, behind and above the starter.

Sheet metal is steel and conducts electricity just as well as any other.
 
Thanks.

I had seen that post a few days ago and it seemed to be more about the manifold heater wiring so i didn't follow it. I see now that it showed the manifold relay mounted to the sheet metal and the starter relay mounted to the battery box.

I was under the impression that it was important that these relays needed to be grounded. Must be a different system I was recalling. Even so, since I was having a hard time getting a "good" ground using the block/bolts the sheet metal and its condition left me less than optimistic.

I guess what I need to know now is that I am looking at the correct relay replacement - BWD #S103?
 
The Ford part number for that relay is 311006. The Ford 311006 and the BWD S103 both cross over to an Echlin ST542 on the NAPA website. It is described as "12V, insulated coil, flat mounting bracket" which is what you're looking for.
 
Alan has given you some part #'s and yes S103 is one of them.
This (tractor) relay gets its ground threw the starter button on the trans so it does not need to be grounded.
Most cars and trucks use a relay that gets its ground threw the relay mounting bolts so yes it needs a good ground.
 
I've been looking for that napa number for the isolated case for a while. i used to have it before my old home pc crashed.

thanks for posting it again!

soundguy
 
(quoted from post at 09:56:29 02/11/10) Alan has given you some part #'s and yes S103 is one of them.
This (tractor) relay gets its ground threw the starter button on the trans so it does not need to be grounded.
Most cars and trucks use a relay that gets its ground threw the relay mounting bolts so yes it needs a good ground.
This has the SOS tranny and it has been been set up with a key-only ignition.

My gas 62 2000 has the key-on / tranny start button. This diesel came to me this way - no start button on the tranny cover. We were cranking it and turning it over (again, key only) when we discovered the pump was bad (hot cables, too).

Do I need to be reworking something else while I'm at it?
 
(quoted from post at 11:12:35 02/11/10)
(quoted from post at 09:56:29 02/11/10) Alan has given you some part #'s and yes S103 is one of them.
This (tractor) relay gets its ground threw the starter button on the trans so it does not need to be grounded.
Most cars and trucks use a relay that gets its ground threw the relay mounting bolts so yes it needs a good ground.
This has the SOS tranny and it has been been set up with a key-only ignition.

My gas 62 2000 has the key-on / tranny start button. This diesel came to me this way - no start button on the tranny cover. We were cranking it and turning it over (again, key only) when we discovered the pump was bad (hot cables, too).

Do I need to be reworking something else while I'm at it?

tigercreek,

Yes, you should rewire so that ground through the tranny is required to start. As it is wired now, I assume there is no protection to keep you from starting in gear and running yourself or someone else over in the process. While it is a good practice to be in the seat [i:82360d82e1][u:82360d82e1]every[/u:82360d82e1][/i:82360d82e1] time you start a tractor, I'm guilty of standing next to the key and reaching around to start my SOS tractor, especially in cold weather when I am going to let it warm up a little. There is a grommet in the tranny top cover where the wire typically exits the transmission. It is connected to the valve body such that it is only grounded in Park (I believe, not sure about N), thus providing start protection. If you are lucky, you may find a cut off wire or stub sticking out of the grommet. Best of luck.



Chris
 
The start button is on the right side under the edge of the hood. The solenoid grounds throuh the neutral switch in the transmission. The key start will work if you have the solenoid grounded through the saftey switch.
Any other way will ge you killed.
 
Understand the safety issue.

Right now I'm just trying to verify that the motor is good and worthwhile to swap to my other tractor.

Other than the safety issue is there any problem using it as-is to start? My cables were getting very hot (verified good starter) and was assuming a weak ground or poor cables. All cables now are 1ga. Weather permitting I'm going to put the pump back on and try things again this weekend. Just trying avoid any electrical issues.

4000wiring.gif

Did this from memory.

The solenoid on there now is a UNI0504 ???
 
That set up is using a car relay that needs to be grounded to work and is bypassing all the safety features.

Since you have my diagram you can refure to it to picture your next step.
Replace the relay with the correct one.
Take the wire running from the relay to the key off the back of the key. (it should be hooked to S now)
Put this wire on the R (run) post on the back of the key.

Next run a wire from the unused post on the pictured relay to on side of a dash mounted starter button.
Run a wire from the other side of the dash starter button to the wire coming out of the SOS trans. That wire is hooked to ground when the SOS is in park and will provide the ground for your relay to work.
 

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