John Deere 40 crawler questions

[Keepitrunnin]

New to the group and new to the dozer!
My dad and I are doing some updating on a 40 crawler we bought a couple years ago
Things we’ve done so far
-remove tracks
- remove undercarriage and replace tension bolts on idlers
- put track setup back together
- rebuilt the carburetor
- all new wiring to starter switch, generator and coil.
-oil and hydraulic fluid change
-new plugs
-new battery and cable to starter

Waiting on a water temp gauge and ammeter.

Questions I have
1. When I turn the switch on and pull the starter lever, it’s very slow to roll over and will eventually start but not very quick.
Any ideas on what this might be caused by
2.
Would there be any benefit in changing out any of the other electrical?



Thanks for the help!

 

[Jim.ME]

New to the group and new to the dozer!
My dad and I are doing some updating on a 40 crawler we bought a couple years ago
Things we’ve done so far
-remove tracks
- remove undercarriage and replace tension bolts on idlers
- put track setup back together
- rebuilt the carburetor
- all new wiring to starter switch, generator and coil.
-oil and hydraulic fluid change
-new plugs
-new battery and cable to starter

Waiting on a water temp gauge and ammeter.

Questions I have
1. When I turn the switch on and pull the starter lever, it’s very slow to roll over and will eventually start but not very quick.
Any ideas on what this might be caused by
2.
Would there be any benefit in changing out any of the other electrical?



Thanks for the help!

Welcome to the Forums.

The starter may need to be gone through.

What size cable did you use for your new cable?

If the electrical is working, there is no need to change things.

 

[M-MAN]

6v turns slow. Battery cables need to be 0 or 00 gauge to minimize voltage drop. Ground cable needs cleaned and sanded shiny where it attaches. Even better would be to run a new cable and attach it to the engine or starter case. Check voltage drop while cranking.

 

[Tom in Mo.]

Also keep in mind they just spin slower than the modern equipment. Before starters people started them with a crank.

 

[MSD]

Put a 12 volt battery in it.

 

[Hayfarmer]

Slow roll over typical of 6 V tractors in this era. I agree with posts above, ie battery cables etc. If engine is tuned well they will usually start even with rolling over slowly. I fought this on 430 for years then converted to 12 volt system and it is great.

 

[old]

New to the group and new to the dozer!
My dad and I are doing some updating on a 40 crawler we bought a couple years ago
Things we’ve done so far
-remove tracks
- remove undercarriage and replace tension bolts on idlers
- put track setup back together
- rebuilt the carburetor
- all new wiring to starter switch, generator and coil.
-oil and hydraulic fluid change
-new plugs
-new battery and cable to starter

Waiting on a water temp gauge and ammeter.

Questions I have
1. When I turn the switch on and pull the starter lever, it’s very slow to roll over and will eventually start but not very quick.
Any ideas on what this might be caused by
2.
Would there be any benefit in changing out any of the other electrical?



Thanks for the help!

Is it still 6 volts I figure it probably is since you said generator. If 6 volts are the battery cables 0 or 00 in size if they aren't tat is part of your slow problem

 

[Lavoy]

Starter probably needs to be rebuilt or replaced. Also check all connections and where the ground attaches for any corrosion. If you havent already, put new cables on it and has been mentioned, get good cables. I have had what otherwise looked like a good cable actually have a bad connection internally. Replace the cable and good to go.
I run multiple 2 cylinder crawlers on 6 volts, if they don't start, there is a problem somewhere, just need to find it.
www.jdcrawlers.com