Cat twenty two timing.

Welcome to the ACMOC BB,

Its cool to get a piece of Family History from Grandpa.

When timing a mag you have to consider if the impulse has tripped, If you think you have it right (with the plugs out) rotate #1 to just before TDC and advance slowly while watching closely,the impulse should trip very close to TDC. After it trips back the engine up about 1 inch past the mag timing mark, then slowly move forward and watch the points, they should open as the mag mark lines up. Myself I use a buzz box that lets me know when the points open. If this checks out double check the firing order. Make sure the #1 cylinder wire is at the post on the mag where the rotor is and then the rest in sequence.


If your confident timing is good and you have spark, I would use the priming cocks or plugs to add a teaspoon of fuel , if the intake has internal leaks it wont suck in a fuel charge.

Let us know how you make out.

Welcome, that’s a dandy looking 22!


Thanks for the pictures

BP.

So when I slowly turn it over the impulse clicks right before tdc. And when I roll the motor back the to the mag mark the mag is in the window for the #1 wire and the points are open just a little bit. Does this sound correct? I have squirted some gas in priming valve in intake also.
Thank you for the help!

On some mags you set the engine at TDC on compression at #1 cylinder and rotate the mag until the impulse trips and lock it down. If the mag is bolted, and the coupler is what does the timing, the coupler is rotated until the mag trips. You want it to trip at TDC. The impulse takes care of the advance for running. Any spark before TDC will cause a kick back. With a correctly timed impulse, you can pull the engine over slowly and it will still fire off.

Ok I'll try this tomorrow after work thank you!

Hi Dan,
welcome to the BB.
Just in case you do not have this publication I Googled Caterpillar Twenty Two magneto timing and came up with the link below--sometimes Google is your friend.

http://www.angelfire.com/home/cat22/book/manual.html

Some kind person has copied and posted the Grey Twenty Two Tractor Operation and Maintenance Instruction Book.
I suggest you copy and print it out as it could disappear by the next time you need some data.

Hope this helps.
Cheers,
Eddie B.

If it is popping back out the Intake, this tells me the wires are out of order.
Its early in the morning for me to rattle off the correct wire to cylinder sequence.
All the little Gas Cats have the same firing order 10, 15, 20, 22.

55belairdan,

Welcome to the BB. Pm me your email and I will send you electronic versions of the CAT 22 books. I see you're from Minnesota. Whereabouts? Our MN ACMOC chapter 3 is running strong but we always welcome new members.

Bioggastractor

I have it at 1 3 4 2 #1 in front of motor. I think that's correct?