Quote:
Originally Posted by Gfann
Yea I did that.
I reset the spring on one side. Looks better. I reassembled everything. Then I tried "starting" it. Did the same thing as before. Right now I'm looking at the S/G. I took it apart going through the manual about cleaning it and testing it for shorts. The interior was covered in black dust from the brushes. They are worn down. They are still about 3/4 of an inch. long. Not sure how long they should be when new or in good shape.
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OK...LET'S REVISIT.....
The purpose of the ACR is to reduce compression when starting the engine to allow the starter to not have to fight the compression when spinning the engine.
The ACR does this by
SLIGHTLY opening the exhaust valve. This
REDUCES compression, it does not eliminate it, therefore when you had your thumb over the hole you would still feel
some compression, and a compression guage would show
some compression also, just not normal (say 120 lbs).
The ACR are weights attached to the cam gear and one of them has a metal tab on it that at slow speed (let's call it cranking speed) is in position to slightly lift the exhaust valve open during the compression stroke, thus you give the starter an easier job of cranking. When the engine fires, engine RPM increases beyond cranking speed, the cam gear spins faster and centrifugal force slings the weights outward so that the metal tab on the weight no longer messes with the exhaust valve and you have normal compression and a running engine.
You see the tiny spring in j-mech's picture???
That spring is almost hair like and not very strong, but it is strong enough to hold the ACR weights inward when the engine is turned by hand (or at cranking speed).
Your video clearly shows one weight flopping around when you are turning the engine by hand.
THIS SHOULD NOT HAPPEN. You then say you "reset the spring on one side and it looks better". DUH, what does "looks better" mean?? Was it still flopping, or just not as much?? Did you crank the engine with the cam cover off to see if the spring stayed in place??? You discovered that something was clearly wrong, and instead of following that issue you are chasing other windmills by tearing S/Gs apart.
The spring is either broken or weak. If it is not broken you may be able to tenderly bend it through the cam cover hole to restore tension.
You gotta fix the big problem first instead of shotgunning the whole tractor!