Re: IH Super C Electrical Woes

Posted by Janicholson on September 25, 2005 at 10:17:27 from (66.173.50.141):

In Reply to: Re: IH Super C Electrical Woes posted by Tom Yaz on September 25, 2005 at 08:38:19:

Dear Tom,
Fixing ignorance is easy.
There are two "connections" between the distributor and the coil. One is the high voltage wire (thick spark carrying), and the other is the small 14 gage wire from the Plus side of the coil to the points. This wire is fastened to the distributoe with a small nut on a stud sticking out of the cast part of the distributor.
Do this test:

Remove the cap from the distributor Two flat clips) near where the small wire (mentioned above) attaches.

Pull the coil "spark" wire out of the coil.

Pull #1 plug wire off of the #1 plug (closest to the radiator) and out of the distributor cap. (only remove one wire, it prevents confusion later)

Place a spare spark plug on the plug end of the wire just removed, and put the other end (that was in the cap) into the coil. rest the spark plug body on a metal surface where you can see its gap.

There may be a black/brown plastic disk under the cap, along with the rotor. Pull the rotor off (note it has a D shaped mounting hole to index it to the shaft) and remove the plastic disk if it has one.

Inside this next chamber are the points, consisting of a fixed contact screwed to the back plate, and a movable point arm with a contact on it matching the fixed contact. There is also a four lobed cam which rubs on and opens the points at the exact moment that spark is needed.

The condenser is also located inside, it is a metal can about an inch long and 9/16 diameter with a wire attached.

Tools needed a screw driver, and a dry popsickle stick or dry hard wood twig shaved to popsickel stick thickness and cleaned of bark.

Turn on the ignition by pulling out the button on the dash. (do not crank the engine)

Use the stick to open the points by pushing the movable arm in the direction away from the shaft.

If the points were closed, this action should produce a nice spark at the test spark plug. If it does not, the points may not have been fully closed. Next use the screwdriver, (holding only the plastic handle) place the metal blade at the points shorting the points to each other, then breaking the short by removing the driver. There should be a spark at the test plug if the points were open.

This process tests the condenser, and the coil.

the points should be cleaned with 220 paper, and gapped at .020" with the distributor four lobe cam pushing them their widest. Hand cranking the engine with the hand crank, or rocking the engine in high gear (with ign off) will position the cam on a lobe. (the lobe is just a rounded off portion of what looks like a square part of the distributor shaft).

The book is invaluble. Old cheap automotive text books are also very appropriate. Libraries have manuals in most cases that will apply.

Good luck, Email me if you want my phone # to talk you through it.
JimN

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• Re: IH Super C Electrical Woes Tom Yaz 19:19:57 09/25/05 (0)

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