502 Wiring

[WHX?? 48,815]

Anyone have the wiring diagram for a 502? Guess the real question is did it have a solenoid ala 701? This one does and appears to be original.

Ig switch definitely not orginal but works. Gotta like the wiring soldered on ... works I guess. 

 

Tecky H60 mag ignition ground to kill. 

 

Figured as long as in the shop for tank sealing to cure might as well replace some very old wiring. 

[gwest_ca-(File Mod) 11,040]

Possibly a model 552?

 

[WHX?? 48,815]

7 minutes ago, gwest_ca said:

Possibly a model 552?

Belt guard says 502? 

 

SN for files.

 

Guessing it had a amp meter at one time?

Switch now for bug eyes but moving to hood stand for a volt meter. 

[elcamino/wheelhorse 9,297]

@WHX?? check with @squonk     Skunky loves teckys.

[squonk 41,071]

Check out those Simplicity wheel weights!

[WHX?? 48,815]

4 minutes ago, squonk said:

Check out those Simplicity wheel weights!

They work!

 

Here's something  else odd ... wrong motor... repoed? 

[ri702bill 8,316]

Repowered?? Most likely. Sixty years of use & a Tecumseh don't mix.... for that long, usually...

[stevasaurus 22,717]

Jim, that is not the right engine for a 502.  

[Racinbob 11,055]

I thought the 502 was yank start. 

Here's diagrams for a 702 and 552. 

 

[Racinbob 11,055]

 

Here's a nicely restored 502 but can't be certain it's 100% correct. 

 

 

[WHX?? 48,815]

2 hours ago, ri702bill said:

Repowered?? Most likely. Sixty years of use & a Tecumseh don't mix.... for that long, usually...

Gotta be... off shore carb and this one runs nice.  Not a hint of smoke. 

 

2 hours ago, Racinbob said:

I thought the 502 was yank start.

Right again  Bob ... this one has yank and electric. I know Pullstart's  is yank and original I believe. 

So this one has been repoed. Also unlike a 701 solenoid this one reads as needing B+ to energize unlike a 701 that needs B-. 

Spec # does not come up in any  charts I have. 

No wonder there is no wiring diagram ... it's not supposed to need one.

 

Thanks Guys

Edited December 13, 2023 by WHX??

[ri702bill 8,316]

1 hour ago, WHX?? said:

No wonder there is no wiring diagram ... it's not supposed to need one.

!!! And not exactly the same as a 552 wiring either, I suppose. Got yourself a Horse of a different....something...

[WHX?? 48,815]

15 minutes ago, ri702bill said:

Got yourself a Horse of a different....something..

Not original then... open game for a digital voltmeter then... 

[squonk 41,071]

3 hours ago, ri702bill said:

Repowered?? Most likely. Sixty years of use & a Tecumseh don't mix.... for that long, usually...

6 years of use and Tecumseh don't mix ! 

[953 nut 55,194]

4 hours ago, WHX?? said:

Also unlike a 701 solenoid this one reads as needing B+ to energize unlike a 701 that needs B-.

I thought the 701 solenoid was grounded to close and open circuit when at rest.         

 

[WHX?? 48,815]

Even tho I am a recovering Catholic I felt the need to go to confession. 

Me: Bless me father for I have sinned.

Father O'blivion: Now what have you done? 

Me: I drilled a hole in 60 year old metal.

Father: You been hanging out with that @Achto character again ain't  you.

Me: Bless me father for I have sinned twice.

Father: What did I tell you about him... he has no respect for original. 

Me: I know but it was just a PO hole I made bigger. 

Father: Did you vacuum up the shavings. 

Me: Yes father.

Father: You are absolved of your sins. For your penace you shall bury said vacuum cleaner bag shavings in a plow field and make promise to rescue another horse. 

Amen. 

 

Guess I can live with that...geez I was just relocating a switch...

 

 

[WHX?? 48,815]

28 minutes ago, 953 nut said:

I thought the 701 solenoid was grounded to close and open circuit when at rest.         

 

Yes same difference Richard. When you hit the start button on 701 you send B- to the solenoid.  Everyone knows electrons actually flow from - to + don't they? 

Edited December 14, 2023 by WHX??

[953 nut 55,194]

20 minutes ago, WHX?? said:

Everyone knows electrons actually flow from - to + don't they?

That is the way they taught us in the Navy, something to do with the excess of electrons on the battery negative side as I recall.

[WHX?? 48,815]

8 minutes ago, 953 nut said:

 excess of electrons on the battery negative side as I recall.

Absolutely true... another reason older machines had positive ground. I have no idea when it all changed to negative  gnd but be advised to always hook up negative last when hooking up power to our tractors. 

Accidentally grounding the wrench on a 36 volt system when hooking up positive last can be a welding experience.

 

[Achto 27,565]

52 minutes ago, WHX?? said:

I have no idea when it all changed to negative  gnd

 

I think it changed with the end of 6v systems and advent of 12v systems. Guessing the engineer that decided we need to switch to 12v on everything had reason, or never studied DC electricity. 

[Pullstart 62,837]

7 hours ago, Racinbob said:

I thought the 502 was yank start. 

 

 

 

6 hours ago, WHX?? said:

I know Pullstart's  is yank and original I believe. 

 

yep, all original.  ‘62 sheet metal, ‘64 frame, air compressor K181T Kohler, ‘78 C series wheels.  All original parts though!

[Tractorhead 9,064]

2 hours ago, Achto said:

 

I think it changed with the end of 6v systems and advent of 12v systems. Guessing the engineer that decided we need to switch to 12v on everything had reason, or never studied DC electricity. 

 

 

If you check the electrochemical rows you will find the Answer for your Question.

Two electrical poles and an Electrolyt be enough to react.

 

That becomes more focus if the Chassis was used to reduce wires in Car electric and save so copper.

So here we have the electric component for our „galvanic experiment“.

 

If Sheetmetal is under current be used in moisture or wet Ambiente like Cars, Trucks or even Boats they found out that Steel

If it is used as Power component can be reduced in corrosion if the Polarity is be Changed to negative on chassis.

That Change from positive ground to negative ground was simply based as Rustprevention.

 

Vehicles with positive on chassis corrodes faster on Sheetmetal.

Maybe you have allready heard from the so called sacrificial Anode on a Boat.

An Anode is allway‘s a positive pole and should sacrify itself first if the Paint of the Boat or Boatengine is scratched

to prevent the Steelbody of a boat or the Aluminum shell of an Boatengine corrodes before.

 

That was the only intension, Manufacturer changed the polarity on Chassis from positive to negative Ground.

 

Manufacturer in the past do have lot of experiences, felt more than today young Engineers have.

Today they have AI, that prevents thinking by yourself.

 

[953 nut 55,194]

6 hours ago, Tractorhead said:

Manufacturer in the past do have lot of experiences, felt more than today young Engineers have.

Today they have AI, that prevents thinking by yourself.

Sad but true. With the amount of electronics stuff we have the brain isn't receiving enough exercise. Years back I could calculate a square root in my head with reasonable accuracy. Once calculators with that function came along I forgot how to do it and became dependant on the little box of knowledge. We don't have to commit things to memory any more, just go on line and find it all and now that AI is going to help us think we won't even have to do that ourselves.    

 

[Handy Don 12,214]

10 hours ago, Tractorhead said:

Today they have AI, that prevents thinking by yourself.

Lots of aspects of AI give me pause (as a former practitioner), but this is a biggie. Users that are not harboring a sense of skepticism will fall prey to the inevitable “garbage in, gospel out” syndrome similar to “The internet says..."

[Tractorhead 9,064]

Sadly yes.

my wife have a Friend that told us „Without Internet i can not survive, cause internet know‘s all

so I ask use the Internet the whole day for answers.“

 

I asked her „ok tell me what is my feeling“? 

She answered i dunno.

So i meant „ ask your internet“?

She answered again „The internet could not do that.“

 

i answered - „Why not ?

you mentioned the Internet know’s it all and so many things they be there in - but they can’t answer such a simple question“?

You be wrong if you believe only the Internet.

 

thinking by yourself is definitely more than an tweaked attitude

and needs training.