MTD Mower Model 1254780729/1LK144K90437

Well, I took the blade off the old mower today to sharpen it up and Part of the blade adapter that the blade screws in to to hold it to the motor shaft broke off.

This blade adapter has a central bolt holding the blade on and two smaller bolts holding the blade on as well. The blade adapter one of those two smaller screws fits in is what broke off.

I happen to have a spare mower of a similar model number, so I'm supposing I can remove that blade adapter from the 5 HP B&S motor on the other mower and fit it on the mower I'm using.

I removed the blade and motor off the spare mower, but it's not clear to me how to remove the blade adapter. There are flat spots on the bracket that a wrench would fit on, but perhaps there are other means of holding the bracket on.

Can I get some advice for removing that adapter?

 

Hello SeattlePioneer,


The blade adapter slides onto the end of the crankshaft, If this is a older mower it's likely rusted/stuck to the shaft. Soak it with penetrating oil and try tapping on the sides while pulling down on it.

I've ran across a few that required a puller for removal.....


Good Luck

 

Ohhhh Kayyy.


I did that on the parts mower, and got the blade adapter off with the aid of a little hammering.

There's a key like a flywheel key that broke off while doing that. I suppose I can expect to break the key when I pull the broken adapter off as well.

I don't suppose a B&S flywheel key will work as a replacement? Sounds like an obscure part to find.

Hammering on the adapter when the engine was removed was fairly easy --- doing that when the engine is mounted on the mower deck is likely to be more difficult, if practical at all. Unfortunately I don't have a puller, which sounds like the right approach.

 

You should be able to take that key out, some are made without the key made to the adapator. May be like a woodruf key.

 

Sorry SeattlePioneer,

I should have explained better or drew a picture showing where to tap on the adapter, I meant around the sleeve area not back and forth on the ears.

That broken key is made as part of the adapter, You'll have to buy a new one now..... [ATTACH=CONFIG]1510[/ATTACH]

 

Yes, this was obviously a separate key, not a part of the adapter itself. It came out in a couple of pieces and I cleaned some smaller pieces out after the adapter came off.

Is the key something I could likely save when I remove the adapter from the other mower, or should I plan on replacing it?

Should I be able to get the right replacement from a local mower repair shop?

 

Save it,,,you'll never know if the need may come by again.

 

If that's the case (most MTD's are made as one) you should be able to get a key at any mower parts house or even a hardware store, But a flywheel key is too soft for this application.....

 

I borrowed the use of a gear puller to remove the blade adapter, but I discovered that since one side of the blade adapter is broken off, there is no way to set up the gear puller for a good pull. It just slides off since it's unbalanced.

It doesn't seem like hammering to get the blade adapter off is likely to work either, since again there is only one side that can be hammered on, and that unbalanced force doesn't move the adapter.


Any bright ideas?

 

SeattlePioneer,


Check with your local chain auto parts stores, Some have gear pullers such as below in their lone-a-tool program.....

Amazon.com: TEKTON 5681 3-Inch 2-Jaw Gear Puller: Home Improvement

 

A puller will never work. You may have to try a nut spliter type tool and split that blade adaptor, all you need to do is crack it an it will come right off. Good luck,,just my opinion.

 

They work all the time for me..... .

 

When the adaptor is broken??

 

That's right mowerdude,


The object is.....for example;

If you have a 3/8" size crankshaft hole insert a longer grade 8 5/16" bolt. Choose a bolt long enough to bottom out in the hole and stick out past the flat surface of the blade adapter far enough for the adapter to clear the crankshaft.

Put a 3/8" drive 1/2" socket on the head of the long 5/16" bolt, The square drive hole in most sockets have a recessed taper to them, This will hold the pointed puller center bolt in place so it doesn't walk off the flat 5/16" bolt head.


Here's a couple examples, This engine was already on my work bench with the adapter removed using the same mentioned method. I use one style puller with jaws from another style puller, It's a little harder to set up but it works, The style puller I linked above would be much easier to set up/use. Since I had already removed the adapter both these adapters just slid on and off easily so I really couldn't lock my puller in place with the socket or use the required length 5/16" bolt.....

This is the original Snapper adapter with no ears;



This is a new MTD adapter, But as you notice I'm not using the ears;




.

 

Ok, I see your point and thank you for the education.

 

Thanks for the pictures, but that method doesn't appear to want to work for me.

There are two pulley segments for the self propel drive just above the blade adapter, and the blade adapter fits nice and tight against those pulley segments (they are independent of each other).

So I can't get the puller between the blade adapter and the first pulley segment. I tried pulling on the pulley itself and broke a piece off.

Nut splitter, eh? Never used one of those before!