JD 730 loose flywheel

[lostwrench]

Any suggestions on a loose flywheel on a 730 diesel. Taper lock, liquid steel, sell for parts, different crank and flywheel, yard art,
scrap out, target practice???

 

[JIM MN]

If crankshaft flywheel splines good, a taper-lock flywheel will work, will stay tight. If splines are bad, different crank with a taper-lock flywheel. If no money? Yard art!

 

[Gary Reif]

Those splines can be rebuilt. We rebuilt lots of those at a machine shop I worked at. Of course that means the crank has to come out, we always had a new flywheel and nut to fit up the new splines. I guess it depends on how valuable the tractor is to you.

 

[caterpillar guy]

Not sure what a flywheel and crank would cost nor the cost to machine something like that. Prices have been changed so much since I had any of that done. Seems like a lot of tractor to go just to yard art or junk over that. I think I would consider some option to fix the problem. Even if it was to make a round end and use a wedge lock hub for a belt pulley and bolt /weld the flywheel to the hub some how.

 

[John Deere D]

Any suggestions on a loose flywheel on a 730 diesel. Taper lock, liquid steel, sell for parts, different crank and flywheel, yard art,
scrap out, target practice???

Please share with the "YT" group as to the running history of this machine?
eg...If flywheel was replaced with a Tapper Lock flywheel,is the rest of the Tractor in first class operational condition?
Is known operating condition of this 730 lost history,as no history of it's past condition.

 

[lostwrench]

(John Deere 730 diesel standard) Well bought a new tapper lock flywheel (Allen machine) as well as the wrench. I am working on taking off the spacer and thrust washer behind the flywheel and cover to freshen up, but for whatever reason the spacer is tight, sprayed some penetrating oil a softly tapped with a brass drift and hammer with no luck. I would appreciate some advice on this. Manual says pull the spacer off, that's it! Not this time! Thank you in advance.

 

[Dan in Ohio]

IIRC that spacer (slinger) is held in place with a small screw with a square head like pictured below. The surface of that slinger (spacer) is probably worn smooth and the head of that screw may be difficult to see. # 18A or 18B.




Actually that is #14 spacer pin not 18A or 18 B.

 

[wore out]

IIRC that spacer (slinger) is held in place with a small screw with a square head like pictured below. The surface of that slinger (spacer) is probably worn smooth and the head of that screw may be difficult to see. # 18A or 18B.

View attachment 107787
View attachment 107788

Actually that is #14 spacer pin not 18A or 18 B.

Actually, the "slinger" has a cork ring in it (or possibly rubber) and simply slides over the crankshaft. Either is stuck in place with hardened "varnish deposits" from years of operation, or possibly someone has stuck it in place with some sort of gasket sealant

As to the "small screw" the other poster mentions it is not a screw at all, but actually a non-threaded pin that pushes into the "slinger" with it's square head exposed. There is a slot in the flywheel into which the square head engages as the flywheel is installed (the slinger must be positioned so the head of the pin and the slot in the flywheel match up).

With the flywheel removed the little pin has NOTHING to do with sticking/holding the slinger in place.

Before putting this together, IF the head of the pin is worn off, look closely for it's remains and drill a small hole on it's center and engage it with an extractor or self- threading screw and twist it and tug it out of the slinger.

 

[744k]

the square headed pin pushes into the flywheel and the square head engages into the slinger

 

[John Deere D]

Any suggestions on a loose flywheel on a 730 diesel. Taper lock, liquid steel, sell for parts, different crank and flywheel, yard art,
scrap out, target practice???

For those who ever wondered as per below:
Will a John Deere 70 flywheel fit on a 730 and function correctly?

YES is my answer, However, read my answer.

In 1976 my Father had to replace the Fly Wheel on his Diesel JD 730,and only a JD 70 Diesel Flywheel was available:

I weighed the JD 70 FLYWHEEL, counted the number of TEETH on RING GEAR, checked all timing marks, checked were the master spline and the "V" marks are.

The only ONE difference in the FLYWHEELS was, the JD 70 FLYWHEEL had to have a RING / SPACER machined to be placed between the Inboard side of the JD 70 FLYWHEEL so as FLYWHEEL would not CONTACT CRANKCASE of the JD 730.

Place a straight edge on the inboard side of the JD 730 FLYWHEEL, and check the distance from the straight edge to the HUB of the JD 730 FLY WHEEL.
Do the same with the JD 70 FLY WHEEL, and you shall see the thickness of the spacer ring (slips over Crankshaft) required to position the JD 70 FLYWHEEL correctly on the JD 730.

I drilled a HOLE in the spacer ring so as the Oil Wind back RING, can still be driven by the DOWEL ( unable to recall if we made a longer dowel) from the FLYWHEEL. We installed GRADE 8 BOLTS, torqued to JD 730 specs.

Tractor ran approximately 1000 HRS with JD 70 Flywheel and was still running properly when Tractor was sold.

The JD 730 had a Starting motor (NOT straight electric)


Bob....Retired Power Engine.......

 

[wore out]

the square headed pin pushes into the flywheel and the square head engages into the slinger

Thanks for the correction, it's been a long time (thankfully) since I've dealt with that HEAVY stuff!

 

[bob p mn]

I installed an Allen taper lock on my 720 diesel ran it for years and it was still going strong when I sold the 720. I think it's probobly the best choice rather than going through all the work of pulling the crank to repair the splines.