Case IH D40 hard start

[Dwighop1]

Early 2000 D40 seldom starts on the first, second, third, etc key turn. I’ve pulled the starter and grounded it to the frame and it throws and spins solid every time. My best guess is a rusty flywheel here in the southern humidity prevents the starter from spinning the flywheel and starting. What is my easiest solution? I don’t know how to get to the flywheel to knock the rust off? Don’t think I can spray anything in there correct?

 

[Mike1955]

I live in the south and I have never witnessed this. I guess it’s a first time for everything. My money would be on the starter or bentix. If not some bad places on the fly wheel. I’ve heard engines stop at the same place every time. Good luck

 

[Dwighop1]

Doesn’t make sense to me either but all I can come up with. It’s a new starter that when disconnected works fine everytime through the tractor wiring. It’s getting juice and engaging right just doesn’t turn over the flywheel.

 

[RjCorazza]

What about a high resistance connection on the battery, ground, or starter cables? That could account for it not turning the engine over when installed and spinning the starter when not installed under load.

 

[Harry in Ky]

Maybe if you describe the symptoms more accurately it would help. "Seldom starts on first, second, third start" What does that mean? Starter spins but the engine doesn't? Starter does nothing? Something clicks but nothing happens? Details matter.

 

[dieselscout80]

I think those are the same as the New Holland TC series tractors and they are know to get corrosion inside the battery cables.

Cleaning the clamps does NOT fix the internal corrosion issue only replacing the cables does.

If you look on the New Holland sub forums you will see multiple threads on this issue.

 

[nyone]

Look up the starter relay mod.

 

[Dwighop1]

Maybe if you describe the symptoms more accurately it would help. "Seldom starts on first, second, third start" What does that mean? Starter spins but the engine doesn't? Starter does nothing? Something clicks but nothing happens? Details matter

I hear the starter engage with the flywheel with the click but nothing turns over. I assume the starter is trying to turn over since I hear it click. I can keep on trying and trying and trying and then suddenly it will fire right up.

 

[Dwighop1]

I think those are the same as the New Holland TC series tractors and they are know to get corrosion inside the battery cables.

Cleaning the clamps does NOT fix the internal corrosion issue only replacing the cables does.

If you look on the New Holland sub forums you will see multiple threads on this issue.

Interesting. I've replaced the negative but not positive cable. Changed the end but not the cable and it is old and been outside.

 

[Dwighop1]

Look up the starter relay mod.

Is that under New Holland, Case or in general?

 

[Harry in Ky]

Why don't you try the basic test? Remove the signal wire from the starter. Put a short jumper wire on the spade and "jump" that to battery positive. Do that a few times. Do you get the same result as with starting (or attempting to start) with the key? If yes, then you have a starter, battery, cable, or related problem. On the other hand, if the starter engages and cranks the engine first time every time, the problem is with the incoming signal circuit.

 

[Dwighop1]

Is that under New Holland, Case or in general?

Nevermind. Found the multiple threads.

 

[Dwighop1]

Why don't you try the basic test? Remove the signal wire from the starter. Put a short jumper wire on the spade and "jump" that to battery positive. Do that a few times. Do you get the same result as with starting (or attempting to start) with the key? If yes, then you have a starter, battery, cable, or related problem. On the other hand, if the starter engages and cranks the engine first time every time, the problem is with the incoming signal circuit.

Incoming signal issue. Guess I get to build the starter relay. Sure will save a lot of aggravation. Seems like an easy build. Anything to watch for? Thank yall for your help.

 

[Harry in Ky]

Pretty straight forward. Have done it a number of times. Plenty of instructions out there. Just stay away from the three dollar relays. Get one you can count on.

 

[nyone]

I would start with cleaning the battery terminals. Then disconnect the signal wire like stated above.

My tc40 died on me climbing a pile of dirt a few weeks ago. Stone dead, nothing for power. Turns out the battery terminals where just dirty. Parked undercover also. Cleanes the terminals and replaced the rusty original terminal bolts with stainless steel.