Hitachi TRK-8190 Auto Stop fixed

[Gribley494]

I was asked to look at an Hitachi 8190e for my friends son. It had a number of issues which I'd fixed but the auto stop function was playing up.
The problem turned out to be dried-up grease on the auto stop lever assembly (Part No.30 in the service manual) located under the fly-wheel.

I couldn't release the assembly to dismantle it and clean properly as the retaining nut rounded off (red circle).



So after I removed what I could of the old grease I carefully coated it in machine oil to soften the remnants of the grease. After leaving it to soak for 10 minutes and jiggling it back and forwards I managed to free the assembly up, then applied fresh grease. The auto stop now works well in all directions and play.

 

[thinkchronicity]

Hard Grease the movie, coming to a boombox near you soon. Well done. I just had some luck with a rounded off screw head by trying a few odd shapes from this set. They dig deeper into it if you use a smaller attachment. https://www.ebay.co.uk/itm/261440941255

 

[Tinman]

Make sure you're using the right size screwdriver.
Sometimes tightening it can break it free, then you can unscrew it.
I've also used needle nosed Vise Grips or even needle nosed pliers if you can grab the side of the screw.
They also make bits that can bite into the stripped head.
Congrats on getting it working.

 

[Fatdog]

Nice job, Gribley!