075... what am I missing ?

[Honest John]

Ok not sure what I'm missing. Trying to put this old 075 back together and I'm stuck. The worm gear has two forks that protrude and the oil cover washer seat itself on those forks, however the washer also has two pins in it that drive the sprocket. The pins protrude about half way out the top of the washer but also fall below the washer which prevents it from seating itself on those forks. Am I missing something ?

 

[Honest John]

Here's a better pic of the saw along with the ipl. It should be noted that when I acquired the saw all this had been removed. All these parts came from my bucket o parts or off a donor 051

 

[merc_man]

Your first pic looks like its upside down. Looks like two tab things that fit on saw side to clutch drum side.

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[Chainsaw Jim]

Take one of the pins out.

 

[PogoInTheWoods]

There are several variations of the worms, pins, washers, and sprocket and rim drives that all need to match for everything to work right. Been there, done that. This is across the board for the 1111 series saws from the 050 to the 076 and can become a nightmare to sort out especially if you only have some of the parts to begin with. On the other hand, I'd say your bigger problem may be the threads on that crank.

Here's a vid I did a while back on the general subject of the 1111 oil pump drive variations and how the different pieces do and don't work together. A little..., (ok, a lot) long winded but covers most of what you're up against. Wish I would have had a wider angle, but you should get the idea. Hope it helps.

I also have quite a bit of 1111 documentation if you run into anything else that may need clarification. There's also an extensive thread on the 050, 051, 075, 076 on another forum the covers just about anything else you may run into.

 

[Honest John]

There are several variations of the worms, pins, washers, and sprocket and rim drives that all need to match for everything to work right. Been there, done that. This is across the board for the 1111 series saws from the 050 to the 076 and can become a nightmare to sort out especially if you only have some of the parts to begin with. On the other hand, I'd say your bigger problem may be the threads on that crank.

Here's a vid I did a while back on the general subject of the 1111 oil pump drive variations and how the different pieces do and don't work together. A little..., (ok, a lot) long winded but covers most of what you're up against. Wish I would have had a wider angle, but you should get the idea. Hope it helps.

I also have quite a bit of 1111 documentation if you run into anything else that may need clarification. There's also an extensive thread on the 050, 051, 075, 076 on another forum the covers just about anything else you may run into.

Yeah, you're not wrong about the threads. I do have a spare crank if needed but I was hoping to avoid a complete tear down. I might try and clean up the threads a little and see if it will hold.

 

[Chainsaw Jim]

Good luck on those threads John. They do look promising though. The keeper nut only holds the cover washer in place so it doesn't need a very strong torque as much as it needs a good gob of red loctite.

 

[PogoInTheWoods]

He still needs to get the clutch threaded on, tho! And that worm cover plate with the pins doesn't need either pin. The lugs on the worm should go through the slots and between the spurs on the clutch drum if it's a correct spur drum. It's not the correct worm cover plate, but should still work with the pins removed. Ideally it should be a rim drive setup with the notches in the spline stub for the worm lugs.

And changing the crank may be a whole new bag o' snakes if it's one of the older style cranks.

 

[RandyMac]

That series was heavily flawed when it came to oilers, my 050 went in twice and was still marginal, the 075 was in the shop 4 times, they replaced the right side crankcase twice and failed, so I ditched it.

 

[PogoInTheWoods]

There were so many problems and changes with em the techs and mechanics didn't have a clue (or even half a chance) back then.
Nice saw for milling these days if ya have one that's all figured out and dialed in.