M100B pinbank rebuild

[vipertblck]

got the box together and mechanism scanning correctly I believe, not ready to move on and tear my first pinbank apart. checked all 100 coils last night first, they all fire. I watched some tutorials on this briefly that weren't too in depth, but enough to know that the contact washer needs to go a certain way when installed, it takes TIME and patience, and best to do each "bank" one at a time so you're only dealing with 20 small pieces and parts at a time instead of 100.

-what's a good solution to use for the cleaning; all I have is contact cleaner so a run to menards or farm and fleet is prolly needed.

-can I do all this and put back together to test it and get it dialed in with the amp outa the box? if possible would like to send the amp out for rebuild while i'm doing the pinbank-but would like to test the pinbank and adjust things if I finish before the amp comes back.

ANY other help or pointers would be great.

Thanks

Kevin 

[vipertblck]

First thing I noticed. Pinbank assembly is held in eith 4 screws, horizontally slotted holes. How is this set, the only adjustment I see is contact block adjustment. Or are these slotted holes to allow more “adjustment” if the ones on the contact block don’t get it in spec?

Kevin

[Ron Rich]

Kevin,
Yep--!! Sorta set the SAU in the center, to start--set the contact bloc to the center also--align from there--crude alignment by sliding the SAU in those four screws--"final adjustments" made, as per the manual, on the contact block ("frog") housing. Ron Rich

[vipertblck]

Any suggestions as to the cleaning process or detergent, or pointers through the process??

[Ron Rich]

Kevin,
You have a tool available today that I did not have when I did the first one--use it--(your camera--take lotza pix) -- Open, and refer to the parts manual too ! Look CAREFULLY--different screws, lengths, and washers, they MUST go back, the same way they came out ! "Contact {bar} Washers" have a "round" and a "flat" side, and a "notch", and the pins, also are rounded ("finished") on one side only-- must go back correctly--any bent pins, must either be replaced, or "un-bent" (lol) -- REMOVE ZERO "silver plating"--from anything !!
Do this when you have at least 8 hours to spend, with out any distractions. Use a water based cleaner on the pins and washers, Clean all 5 grounding bar centers with a safety solvent-- re-solder grounding wires well--DO NOT use any type of cleaner, that leaves a "residue" ! Do NOT "oil" NOTHIN'!!! Or-send it to someone that knows what he/she is doing !!
Enjoy--
Ron Rich

[vipertblck]

ron,

thank you very much! very helpful info! I tore into it last night and did about half of the disassembly as I didn't wanna do completely so I could look over on a fresh day and see what i may have missed to write down. took pics of it all. i noticed the pins themselves are stamped, one side is sharp 90 degree corners and the other side is more radiused. i noted which side went towards the coils. the contact washers have me confused though a bit, there's a notch and it's off-centered, the longer part of the notch goes towards the right side when facing the coils up (at least from the 2 out of 5 banks I've dismantled so far). The part that confuses me is what "side" of the washer faces towards the coils, and what side faces towards the grounding bar. can't seem to tell a difference on either side of the contact washer. you're saying one side IS flat and the other is more radiused? i'm very particular with my work and small tedious tasks such as this; daily job is in competition motorsports industry and i specialize in turbocharger assembly; so lots of small precision things.


thanks again
kevin

[Ron Rich]

Hi Kevin,
The "notched side" of the washer "faces" the contact bar, and yes they too were stamped. One side is "finished" and it is the side that should slide, and make contact with the silver plated, bar. Ron Rich

[vipertblck]

finished up last night; wasn't too bad just tedious and time consuming. I could do these....until it's time to change a coil. I see the solder points of them but can't tell how they're secured to the "electrical board". luckily mine we're all good and actually looked brand new! pinbank contacts we're a different story, PURE black. anyway buttoned it all up and made maybe 10 selections or so last night after adjusting the contact block....fires and operates on every one. time will tell is all 100 selections are good but all in all; pretty straight forward job.

kevin

[Ron Rich]

Kevin,
Cool--glad you got it ! I'll send them all to you from now on---
Ron Rich

[strehl]

who is a good person to send a pinbank to have cleaned?
Herb