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ChadS
12-05-2004 08:39:28
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Re: Distributor Woes in reply to MagMan, 12-05-2004 06:38:48
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HMM, let me think here for a sec,, (jeopardy theme song going on here LOL!) There is nothing, that holds the rotor shaft, to the main drive shaft, it just rests on top of the shaft, and the weights, and the springs, hold it down. What happened to you is,, the slack in the advance is worn out,, and it has slack,, in cold weather, or it sits for a while,, the points trigger, will actually create the slack to go back and forth, (advance and retard, advance and retard) very fast, rocks the rotor shaft on the distributor shaft, and then, POP, the springs let loose, which relases the wieghts, and allows the rotor shaft to move upwards. If, there is no physical damage to the plates, rotor shaft, or drive shaft, if you still have all the small parts, like the washers, put it back together and use whte lithium grease, as lubricant on the advance weights. Now, you are talking about a 1/2 turn of play on the rotor shaft, and the drive shaft right? that is how much the advance actually travels. if you look at the bottom of the rotor shaft, youll see a small little round pin, which sets down into the drive plate, that is the setting of how much the rotor shaft will change the timing. if that pin is in the plate correctly, it will turn about 1/4 to almost a 1/2 rotation. It moves quite a bit actually. Those big ol stock springs, keep them from moving that far actually when you grab the rotor, and snap the advance rotor. Thats alot of distance in these distributor caps to get the advance right, (bteween plug towers on the cap) so it has to move that far. The springs,, keep the tension at rest, and when you quickly snap the drive shaft, the advance should activate, and throw the weights out, till centrifugal force takes hold, and brings them back closed, to the rest postition till the next rpm increased is senced, and it will spread upon acceleration, close, upon deceleration. I got a whole bunch of parts for IH and delco distributors from rebuilding them so much for pulling tractors. rotor shafts, plates, weights, and the little chevy springs too! if any of yours is broken, you get ahold of me, and Ill swap you out your broken parts, for good ones. In my work,, broken parts are the best,, cause you can modify them and not be thinking about messing up a good part! LOL!!!! Or, send me out the distributor, Ill rebuild it for you. You, pay the shipping though,,, Merry Christmas! Now on a performance note,, there is HP hiding there MagMan,,, By letting the chevy springs control the advcne tension,, it will activate twice as fast, therefore increasing yout throttle reponse time. the faster the distributor can ignite the fire,, the faster it will go from idle, to full throttle. It will start a whole lot easier too, See, when the advance is worn out,, it messes with the base timing, the rotor shaft, could be half way advanced already, when you set the timing, just due from the slack. Timing is made more precise after the advance is repaired. Id recommend, if anyone buys an old tractor,, this, should be the first thing you look at to repair, when they are bad,, you chase alot of ghosts in tuning it. let me know what you need MagMan, email is open. ChadS
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