Hey guys and gals,

I have a D7e, late model # 48a10xxx. I had let some contractors that are working on our new house use the dozer the other day, and now it wont start.

So what they told me is, they used it, but couldnt figure out how to shut it down, so to shut it down they used the decompression lever.

The dozer has normal antifreeze, normal engine oil, normal transmission oil, in fact all the levels of the oils I could check were in the normal range (pup start included)

Today I went to try and diagnose the issue. So the pup engine (or pony engine maybe its called?) start starts and runs fine, but when I pull back on the lever to engage it to engage the main engine, nothing happens. There is no movement of the main engine at all.

I can see that the lever mechanism is all working and moving properly. I can shift the pup motor to the different speeds and it seems to shift and work ok.


Ill be the first to admit I dont really know how these pup start systems work, so im not really sure if they have some sort of clutch plate or gear of some sort that could be worn out in between the pup motor and the main engine, or if there is an adjustment or whatnot.

Any help or advice on what to check is appreciated, and if you have any direction for me on something to try, assume I dont have a clue what part or piece you are talking about, or where those parts or pieces may be!

Thanks for any and all help.

Yes. There is a clutch. It is adjustable. Dandy Dave!

Ok that is excellent to hear!

Any idea how in the world I may be able to adjust it?

Its on site right now and out of the yard, but I may be able to grab a picture or two tomorrow if anyone needs them to help explain it to me how to adjust it.

It takes a little finessing. You will need to pull the clutch housing cover and there will be a pin that you need to pull out and move it a few notches to tighten it. Maybe someone on here has a book with diagrams. Stopping the engine with the decompressor should not have made a difference. I guess they did not know enough to push the Throttle full forward to cut the fuel from the pump. 10.xxx would be a 1968 machine. Dandy Dave!

I found this. Does not cover D7E. But basically the same Idea. The 1969 D7E I ran years ago had Direct electric Start. The older D-7's from the 40's and 50's I ran had Pony Motors.

talk.newagtalk.com/forums/thread-view.as...000&DisplayType=flat

As described in the "Operation and Maintenance Instructions" for the D7 48A. A manual you should have.

Thanks a ton fellas!

When I first got this machine, it was going to be just a very short term use machine. It has earned its keep for awhile though for sure, and I will probably have to get me a manual for things like this.

Again, many thanks and I will try to report back to see if this resolves my issues or not!

Hello , if you have adjusted that clutch or not , look at the small gear box on the pony . The lever may be in neutral . Put it in "high" because in "low" the main engine will rotate but not start . Have a nice day .

Ok gonna bump this one.

I took the cover off and tried to adjust it, but it didn't do anything different. I was kinda confused by the instructions, pull the pin is easy, then it says turn the collar to the right. So I was assuming this meant clockwise. I did that and tried and tried and tried and the pup motor still would not spin the main motor over.
Anyone have any other tips or ideas or even maybe what I should be doing next?

Also can a guy pull start these power shift machines at all? I wouldn't mind moving it off site back to my dads farm yard where I can pressure wash the area really well and take a better look at what's going on.

Were you able to hold the lock plate and get the pin to drop into the next hole/s?