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4212 hydro issues

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Still can't get the engagement button to pop out on my hydro. Does anyone know where I can get a book on repairing these??I would probably take it apart if I knew what to do.Wasn't sure if I could remove the button without doing more damage. It doesn't seem to want to unscrew from the hydro very easily. It's a mid 80's model #1691340. Thanks for any input! Randy:)

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Hi, CAUTION! Will write more later its 1:23 and I am going to bed. DO NOT ALLOW THE BALLS IN either THE PUMP OR THE MOTOR TO GET OUT OF THEIR HOLES AND MIXED UP. EVEN A NEW HYDRO IS SCRAP IF THEY GET IN THE WRONG HOLES. They are selectively matched to the holes at the factory to tolerances in 10th of thousandths. Al Eden

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I just got done getting mine out. I attached a vice grip to the plunger and then with a small crowbar to pry I pounded lightly with a weighted rubber hammer, it finnally came out. then used emery cloth on the rod and more penatrating fluid. It orks now but I am going to leave it out. Hope this helps Samson

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Hey! Just got that button out! Kept soaking it with different penetrants. Tried some "Liquid Wrench" and it popped out the next day! Thanks for your help:) Just painted the deck today and finishing up tomorrow.

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