Made 2 repairs, replaced just the purge valve/heater, 3 10mm bolts, grease new o rings and clean out the inside of the dryer. (pull out old o rings) and stick it in there. Done. Replaced a explosion proof switch for a hose reel also. Checked air in tires, checked brake adjustment and pressure washed off the whole outside of the truck inside. Now have the fan I use during the summer is running all night long with the heaters and the truck will be dry by 7am. Can't send a wet truck out in this cold. Driver will be happy and me too. Time to go home and do it all again tomorrow.