I recently moved my Little Chief machine into my man cave and decided it was time to get it running again! I bought this machine about 30 years ago and had it set up in my parents front room then in my own front room in the Bay area,but when we moved back to Northern Arizona we didn't have any room for it so it went into storage in a not so clean room in the barn,I moved it into a room in my man cave about 10 years ago but by then the super fine blow sand had gotten into everything and the rubbers had dried out and were falling apart.
So last week I got my set of rubbers and started blowing out the contacts and vacuuming all the dirt out,slowly it is coming back to life,the more I play it the more it's starting to function correctly,I still have some problem with the score resetting,it keeps running past zero,I find if I manually reset all the digits it reset more often. I going through all the play surface contacts cleaning and resetting the gaps,after two days of tinkering I think I have them all working.
When I got the rubber kit I found that there wasn't enough rings for all the single post,then I got looking online and realized someone added extra post,not sure who or when but it's been like this since I bought it,I have some extra rings coming to replace them.
My wife has already sewed up a dust cover for me so that when I do get it running right it doesn't get filled with dust again. The area I live in is horrible for super fine blow sand,it gets in everything,no matter how tight your building is!
Over the last week while working on this I kept seeing link to this website and figured I should join since I know I'm going to need help eventually.

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I already have two Pachinco machines and a video poker machine,my man cave is filling up! My arcade is set up in the kitchen of an old 14X70 mobile home,but it has to share space with my reloading gear,I just ripped out all the cabinets and the propane heater against one wall to make room for everything.
Beside this stuff I also collect WW2 material and I model in 1/6th scale,which takes up a lot of space as well,but it keeps me busy.

I have a rollover button and bushing on it's way. As things come back to life I'm finding a few more problems,the rollover button at the very top sits too high and causes the ball to make weird course corrections,not sure if the clip isn't all the way up or what.
Back when I got this machine it worked perfectly,I only ever had to replace one flipper solenoid,but after sitting idol for 20 plus years in the heat and cold there are a lot of little things,but slowly they are getting taken care of. The biggest problem is the score display isn't reseting,on the 2 and 3 player score display they keep cycling, and I'm not sure if it's in the base or in the back glass section which is causing the problem! Once I get them to reset it will work until I shut off the power,then it takes a bit to get it to reset. I did notice that the digit wheels are stiff in spots,not sure if they can be lubricated or not. Even though I have had this machine for a long time I have had to do anything until now,so any help or suggestions is always appreciated. Thanks

Thanks Dasvis, that was exactly what I was looking for,there is just so much information on this site it's going to take me a while to find what I need!

Thanks ReadyPO, I assumed something like that was was available somewheres! I spent a couple hours going over repair procedures last night so when I get out there today I should have a much better chance of clearing up the last of my problems!

I spent all afternoon taking the score reels out and cleaning all the contacts and removed the solenoids and plungers until all the reels spun around when you manually activated the plunger,I adjusted the height on the top most rollover button,the spot that the clip was supposed to latch onto was wore down really bad,less then a 1/16th,I'm amazed I was able to get the clip off without breaking off the stem! I was able to shim it up so the clip grabbed all the way out on the end of the stem,I'm sure it will break soon so I'll get another one coming.
I also removed the extra post someone installed on the left side center,cleaned the play field and gave it a light coat of wax,put it all back together and fired it up and it worked great,until my last ball,then it wouldn't give me another game,it's set up for free play and usually I just press the red button up front,but now nothing! I tried to activate the coin counter and see if that would give me a game,I could hear the solenoid working for that but still no game,I even clean the contacts behind the button but nothing,I'm sure it's a contact set somewheres but I haven't found it yet!
I tried looking on the schematic that Readypo sent me the link for but it too small to read and my wife is making dinner so she can't help me expand it,I'm barely literate when it comes to computers!

Thanks Bill, I tried to give it some credits and that didn't work,but I noticed there were a bunch of wire twisted together,I thought maybe I bumped them so I was retwisting them and one of them touched one of the contact switches and everything kicked in,so I played a quick game but it would give me anymore games,unless I hit the wire on the contact again,but then I started dropping items on the play field,the bumpers stopped working then the kick out hole stopped then the side bumper down by the flipper stopped,as one item died one of the other started working,very frustrating,I had all those working yesterday,I went through and adjusted and clean all the contacts so I assume this is all connected somehow!

Thanks Hyperball, My wife was able to enlarge it for me,but my brain just won't let me follow all that stuff!
I noticed today that when I open the playfield things start working,I know you aren't supposed to lift the play field when it's powered up but I started hearing a buzz that wasn't there before so I lifted the play field to see what was buzzing,of course it stopped when I got the top up and when I lowered it back down everything was working! I'm assuming there is a bad joint some wheres,maybe a bad solder joint or a dirty plug that is moving,I'll dig into it more tomorrow.