Consider how old the camera is? Consider how old and the poor characteristics of the lubes that were used in the 70's, in terms of ability to age well? Now, consider that in all those years you may have been the first person to ever push the lever on the timer.
Now, for your further consideration, I used to use the "ronsonol" flush to loosen up these old camera, but usually only when the camera was a loss otherwise, ie shutter not working and a CLA more than the value of the camera. That usually means, for the camera's I trade in, any CLA costing over $50.
But I learned a valuable lesson from an Automobile Automatic Transmission repair person. If you buy a car that has an automatic transmission with 150,000 miles on it, and if you do not know the last time it was serviced, DO NOT SERVICE IT. The best way to kill an old transmission is to interrupt the service cycle, or rather the "lack of service" cycle. The crud you knock loose in an old transmission is simply going to lodge somewhere else and damage the transmission. He told me, at the very least, if you are determined to take that risk and put the transmission back on a service cycle, you should do three services, filters and full flushes at 500 mile intervals.
Somehow, I can see knocking the crud loose from the self timer, as being a risk of crapping up the shutter and losing the camera or forcing a CLA. I consider the self timer to be expendable, if not worthless on these old bodies. So, I no longer do lighter fluid flushes only for the self timer.
So I say, either CLA the camera, or quit using the self timer. I simply never even push those levers on any camera I buy any more if everything else is working and it takes good picture. (Well, at least as good as I am capable of dragging out of it.)