Need some tips for offloading hard disk heads
One issue that I think causes more unrecoverable jobs for me than anything is offloading the heads improperly. Once they are off, I can then put something between the heads to seperate them and allow them to be easily loaded onto the platters. However, some heads seem to be very prone to sticking and therefore damaging the heads, making them useless. Hitachi drives seem to be quite prone to this for some reason.
I was just wondering if anyone out there has a solution that allows you to offload the heads without letting them come in contact with one another? Also, is it just a string of bad luck on my part or are the heads really that fragile that coming in contact with one another will kill them? Also, if the tools are magnetized in anyway, will that cause this sort of problem. It’s weird because I can do some swaps like this and they go just fine with no problems, and the heads seem really resilent. However, lately head swaps have been more and more prone to failure. I’m thinking that another possibility may be the fact that my tools are getting magnetized when I’m working with the magnets and such. I had one of the magnets pull a lot of my torx drivers over and ever since then it seems like I’ve had nothing but problems.
1. Head(s) should not have contact with each other, you must separate them with anti static material between their gaps (0.05 mm-0.08 mm)
2. Cylinder surface is very sensitive. One particle dropped onto the surface is enough to make everything miserable for you. You must maintain the clean air around your workplace. Just don’t even think to touch the platters surface with anything….. 🙄
3. Maintain your balance, any split of screwwdriver is very awful
4. As Stanislav Korb uses to say : Ground yourself ! (electrostatic surge is possible)
5. When you try to remove the MHA (Magnetic head assy), you must carefully spinning the cylinder (spin the rotor shaft slowly, put your fingers among those bolts, not cylinder surface ! 😀 )
6. get the new MHA ready (and don’t forget the fill in the gaps before you implant it to the damaged HDA)
7. Slowly insert the new MHA between Cylinders, you can do this by spinning the rotor shaft, and pulling the anti static plastic among the heads at the same time. The heads will follow the movement of the Cylinders… 😀 . Just make sure the antistatic material will not have contact with the cylinder surface !
8. Keep your fingers and hands clean !