This one puzzles me

notjustair

Well-known Member
Just finished chores. It's a little cold sitting up there without a cab.

I spend a lot of time checking to see how deep those front tires on the M are sinking in when the loader is full. There are some surprisingly soft spots. As I was looking down I started pondering - why is there a lock nut on the clutch pedal adjustment????? You have to pull the pin and turn the clevis to tighten it - it is not like it is going to back off on its own. Is it so you aren't as hard on the threads in the back clevis? It is threaded a good inch or so, but I guess all that clutching could be hard on that many threads.

Seems like anything that has lasted this long is well engineered, but that seems like overkill to me.
 
A couple reasons:

- To keep the clutch rod tight in the clevis so the threads don't "chuck" and wear each time the pedal is pushed.

- To maintain the clevis and operating rod yoke square with each other so they don't wear from rubbing on the pedal and the clutch release arm.
 
I've pondered that one myself for something over 50 years. Same on the brake adjusters, as I recall. Redundancy exemplified. Now, if the two o-rings on the shuttle solid rocket boosters had been truly redundant, rather than just claimed to be, one January day in 1986 might have had a whole different outcome. But I digress. My answer to your question is that I'm puzzled too.
 

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