The letter P

Today’s tractor repair was brought to you by the letter P:

Pipe wrench
Penetrating oil
Patience
Perseverance
and a long Pipe for Persuading corroded bolts

Give me a lever long enough and a fulcrum on which to place it, and I shall move the world.
–Archimedes

Give ME a long enough lever and a fulcrum on which to place it, and I shall break any cheap imported pipe wrench you may offer. Learned my lesson, though.