Coupling failure

[ford4150]

Drove my 149 into the garage a couple weeks ago and parked it. Started it up today and after about a minute it started making a racket from the rear of the engine. Sounded like the grass screen rubbing on the housing times 10.

Pulled the tunnel cover and side panels off and started it again. The cooling fan on the driveshaft was rotating in a jerky movement and the sound was still there. Looked a little closer and the problem became obvious.

The 149 has about 20 hours on it since "restoration". New drive shaft, rag joint, coupling, spiral pins, fan and grade 8 bolts everywhere.

You can see in the photo where the coupling separated. Apparently the ring was a press fit on the hub. Don't know if that's correct or an inferior part. It either came from Partstree or one of the other major Cub suppliers; can't remember.
It will soon be welded back together.

[Sam Mac]

Something looks wrong with the part in your pic. If that is the engine end it's not what you should have as an OEM part. If that is or was the coupling for the engine it should look like this. Pic is the part made by Jeff in Pa.

[ford4150]

Originally Posted by Sam Mac

If that is or was the coupling for the engine

Yes, engine end.

The driveshaft came from Jeff; the coupling came from one of the vendors.

[Sam Mac]

Originally Posted by ford4150

Yes, engine end.

The driveshaft came from Jeff; the coupling came from one of the vendors.

Just my 2 cents but I would get a new coupling from Jeff.

[Jeff in Pa]

Originally Posted by Sam Mac

Something looks wrong with the part in your pic. If that is the engine end it's not what you should have as an OEM part. If that is or was the coupling for the engine it should look like this. Pic is the part made by Jeff in Pa.

I have a couple OEM couplers and they are two piece. I didn't like the design due to the possibility of failure so I make mine one piece.

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If you do decide to weld it back together, do your best to make sure it's square or it'll shake the crap out of everything.

[Sam Mac]

Originally Posted by Jeff in Pa

I have a couple OEM couplers and they are two piece. I didn't like the design due to the possibility of failure so I make mine one piece.

~~~~~~~~~~~~

If you do decide to weld it back together, do your best to make sure it's square or it'll shake the crap out of everything.

I never looked at one close enough till now to notice that they are 2 pieces. Talk about a crappy design. To the OP do yourself a BIG favor and get one from Jeff. Just my 2 cents and I have no personal interest in this what so ever.

[Jeff in Pa]

Originally Posted by Sam Mac

I never looked at one close enough till now to notice that they are 2 pieces. Talk about a crappy design. To the OP do yourself a BIG favor and get one from Jeff. Just my 2 cents and I have no personal interest in this what so ever.

For a big manufacturer it works. Stamp out the engine plates and turn 1-3/8" diameter hubs instead of using much more expensive 2-3/4" solid round bar.

[ol'George]

Originally Posted by Jeff in Pa

For a big manufacturer it works. Stamp out the engine plates and turn 1-3/8" diameter hubs instead of using much more expensive 2-3/4" solid round bar.

I hear ya Jeff, so true, anytime you can reduce machining you save $$
Many times it works, other times not so good.
Just like coring holes and using self tapping screws,-- saves a drill/tap operation,
and many times it works just fine.

[DoubleO7]

The two piece type is not the I.H. version.
It is some bean counters way of making more profit.
Appears to have been pressed on then silver or lead soldered?