I had a tractor I wrote up for brakes pulling, they said they adjusted them, I tried it they still pulled. Don't they road test it? Wind it out to about 10-15 mph and hit the brakes and see if it stops straight, DUH!!
Being a former diesel mechanic, I suggested maybe one of the hoses to the front brakes was collapsing inside, (like a balloon that closes off line) never got fixed. Was an experience bobtailing.
Wrote up that there was water in the air tank. Response: "drain air tanks", next day wrote it up again, response, "It's your job to drain the air tanks".
Finally I wrote that I understood it was my job to drain the air tanks, but that water in the air system was indicative of a bad air dryer. Which was THE MECHANICS JOB TO REPLACE!!!
His reply. "air dryer on back order, continue to drain air tank, I can live with that if that was his first response.
I have also seen my fellow drivers, drive a truck with a turn signal out or something and they check off that its safe to use.
I guess you can't get good help anymore, kinda why I quit being a mechanic. People wanted a 3 hr job done in 2, didn't want to pay a reasonable wage. (I worked in a Chevy dealer in Fla in 1970, the labor rate was $10 an hour, mechanics worked a percentage either 45 or 50% of labor charge. You were allotted 2 hours to remove and replace a transmission if you did it in 1/2 the time you made out. If you ran into a snag you lost. Plus I had health insurance that was paid for!
Today you can't find a mechanic that maked 1/3 of the labor rate the dealer charges, and he has to pay for his insuance, etc.
Lets knock down the little guy, the grocery store clerk, the mechanic, the truck driver, the delivery person. They costing us too much money, but lets give the CEO, CFO, and the other suits, (the money manipulating experts) a multimillion dollar raise or bonuses.