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Greetings from Arench.
The lower timing belt gear is not pressed on. Remove pulley bolt and pulley boss.
Get some carburetor cleaner and spray the area around the crankshaft key and let it sit 5 minutes.
Pull the crankshaft key out, and remember how it goes back in. Then slide the gear off by hand. If the gear will not slide off, spray the carburetor cleaner in the hole left by the removed key and keep trying.
once that gear is out of the way just pop it out with a small flat blade screwdriver. Put some motor oil on the new seal and push it on with your fingers. tap it flush with the oil pump body using a big socket.
okay keep at it. it wouldn't hurt to give it a few love taps with a hammer handle.
I gave you all my suggestions. This gear should come off with ease.
I can opt-out of the question with the hope that a different expert can assist you farther.
Hello and good evening. I'm in agreement with Arench. It will slide off, but I have seen them be very stubborn. The key way can be the culprit making it tight to come off. I have a couple of suggestions. If you can get your hands on a propane torch. Screw a couple of bolts into the smaller holes. Put a pair of vice grips onto the end of the bolt. Use the propane torch and heat the sprocket moving around the crankshaft. As you are heating it, try pulling on the vice grips, trying to dislodge the sprocket. You can also try tapping on it while keeping pulling pressure on the vice grip. I know your frustration, but all you need is a fraction of movement to get it off. Give that a shot and see what happens.
Your JA Expert,
carb spray is flammable so be prepared for a bit of a flare up if you are going to torch it.
Yes, I will agree with Arench. Don't use the carb clean and the flame together. Thank you Arench for adding that.
Hi Arench, hi Ivan,
Finally it is out!!!
Thank you both guy's, the most important info I got from you is that this key suppose to go out by fingers.
But developed your idea and I'd like to share it with you, so now you might recommend people the straightway.
But, I wouldn't recommend using any open flame around engine with full gas lines.
Also, two holes at the gear do not help, because they are off the line (the pulling force supposes to be applied along the crankshaft axis).
I used the tap handle which does have a perfectly matching rectangular cross section of its lips. I tithed it using pliers. Then I gently tapped small flat head screwdriver between crankshaft and tap holder.
Let me know if we are even or you feel I should reward you.
Excellent, success is a wonderful thing. If you would like to accept, it's your choice and would be appreciated if you chose to. I'm happy to have helped either way. The rest of the job should be easy for you. Let me know if you need any other assistance as you go.
I feel I found my own solution which have shared with you for free.
Formally I can't push the "Accept" button, because there weren't answers fully satisfied. I'm also hate to click "not satisfied with your Expert".
That's fine, it was a pleasure helping you. Have a great night.
Thank you, I hope we good.
We are, no problem at all. I'm here if you need help in the future.