Proper start up procedure for D4 7U

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Eganx

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I recently purchased a 1950 D4 7U. The old timer I bought it from could start it no problem. When I do it, I fire up the pony, decompress the diesel, try and engage the drive pinion to the flywheel while the clutch lever is to the rear of the machine, but the pinion is spinning so it won't engage. Is there a way to brake the pinion that I'm missing? Is this and issue with the pinion clutch?

This machine is all original. It started life on a small farm, then 35 years ago was purchased by the guy I bought it from. He cleared 3 acres with it in 35 years. The machine has never seen daily use. And I got it for 2k. I'm very excited.....I just need to get the sucker started!
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Sat, Nov 5, 2016 2:34 AM

drujinin

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A quick SEARCH found this for a D4-3T which is similar but older.

"[i]The smaller, horizontal lever coming out of the bell housing is the Starter Pinion Engagement Lever. The larger vertical lever is the Pinion Clutch/Brake Lever. The other lever as you suspected IS a compression release.

The Pony motor is geared to the Starter Pinion. To start the Diesel you first start the pony and idle it down. Open the Compression Release and then pull the clutch/brake lever to the rear to stop the pinion (and keep it from grinding) and then pull up on the pinion lever to engage the pinion with the diesel's flywheel ring gear. Once the pinion is engaged, push the pony idle knob in, rev up the pony and then push the clutch/brake lever forward to crank the diesel. When the oil pressure builds up you can close the compression release. After cranking the diesel for a minute or two you should be able to feel some heat on the diesel head, then you can open the throttle and the diesel should start to fire. Once the diesel fires the starter pinion will disengage (hopefully). If the diesel fires and quits, go back and engage the pinion as before and crank the diesel some more with the throttle closed. It may take several attempts with the pony motor to get the diesel engine started but you'll soon get the hang of it.[/i]"

Youtube "SASQUATCH" to find his excellent starting video of a D2, It will be the same procedure.

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Sat, Nov 5, 2016 2:44 AM

dpendzic

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nice looking machine! it seems that the pinion clutch is dragging--not uncommon as my machines do too. try changing the clutch oil and refill with ATF. if that doesn't do the trick just warm up the pony, shut it off and engage the pinion lever, then restart and spin the diesel with the compression release engaged saves a lot of wear on the pinion/flywheel teeth

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Sat, Nov 5, 2016 2:45 AM

Eganx

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Reply to dpendzic:

nice looking machine! it seems that the pinion clutch is dragging--not uncommon as my machines do too. try changing the clutch oil and refill with ATF. if that doesn't do the trick just warm up the pony, shut it off and engage the pinion lever, then restart and spin the diesel with the compression release engaged saves a lot of wear on the pinion/flywheel teeth

That's actually how I've started it a few times. The pony flywheel is belt driven from a lever mounted starter. But I would like to be able to start it the regular way. Since its getting colder its very hard to start the pony whole driving the diesel. I'll investigate the clutch dragging. That's what I thought the problem might be, but since the guy I got it from could start it correctly I thought my sequence might be wrong.

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Sat, Nov 5, 2016 3:02 AM

cojhl2

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Reply to Eganx:

That's actually how I've started it a few times. The pony flywheel is belt driven from a lever mounted starter. But I would like to be able to start it the regular way. Since its getting colder its very hard to start the pony whole driving the diesel. I'll investigate the clutch dragging. That's what I thought the problem might be, but since the guy I got it from could start it correctly I thought my sequence might be wrong.

That is a very nice looking tractor and the price is terrific!

Pete is absolutely right, get on that clutch brake! Also maybe you have found also the main clutch brake has to be pushed in also. Gear Grinding is not allowed!

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Sat, Nov 5, 2016 6:29 AM

Eganx

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Reply to cojhl2:

That is a very nice looking tractor and the price is terrific!

Pete is absolutely right, get on that clutch brake! Also maybe you have found also the main clutch brake has to be pushed in also. Gear Grinding is not allowed!

Well look at that.....I got it started by pushing the clutch lever to the rear and engaging the pinion! I'm still going to fill the clutch housing with ATF.

Thank y'all for the guidance

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Sat, Nov 5, 2016 8:45 AM

mog5858

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Reply to Eganx:

Well look at that.....I got it started by pushing the clutch lever to the rear and engaging the pinion! I'm still going to fill the clutch housing with ATF.

Thank y'all for the guidance

Look up starting a d2d4 on YouTube there a very good video done by a fellow member he goes through the steps well. Sasquatch on YouTube

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Sat, Nov 5, 2016 9:12 PM

edb

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Reply to mog5858:

Look up starting a d2d4 on YouTube there a very good video done by a fellow member he goes through the steps well. Sasquatch on YouTube

https://www.youtube.com/watch?v=Jcz7qPz8QTE

Hope it helps.
Cheers,
Eddie B.

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Sun, Nov 6, 2016 5:33 AM

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