Only had a little time to mess witht this truck this week. Haven't even moved it since parking on Monday evening. I'm finding and correcting minor things along the way such as the cab marker lamps. Their inoperation was attributed to a defective power wire splice up under the headliner. It was an easy repair once the headliner was removed. This truck does not have an overhead console so went quickly. Was also able to get the PTO to slide into gear but did not spin it as the water pump on the chassis is dry. The pump is new and it says in the placard "Do not run pump dry". It is a "Gorman-Rupp" centrifugal pump and they are not cheap. I will be converting the manual shift PTO over to air shift if the cover is available. I have four new "Chelsea" air shift PTO kits in their boxes awaiting usage. I was also able to get a new fitting to replace one snapped off for the rt. front sprayer nozzle. This was for an air line to enable to nozzle to open and they are spring shut cutting off water spray. Starting to visualize how this truck was set up to operate. It appears the truck can be filled either with the suction pump, from a hydrant, another truck with a hose, and of course a water station with an overhead hose. By opening one valve, and closing another allows a source of water supply to fill the tank, but not charge the plumbing system. After the tank is full, you change the position of these two valves, the fill is closed, and the inlet to the pump is open. There is another valve behind the sleeper that when open, returns pump pressure to tank, and when closed charges the discharge nozzels and piping. I have the manufacturers paperwork and owner's manual for the pump by have not read it yet to see if the pump is self reliefing, or it just cavitates when it can't flow anymore liquid. Figured out the tag axle is a Neway and it's air down, spring up. It will need brakes, and drums badly. The left side shoes are fractured from being so hot and the drums have a massive groove about 7/16 deep and 1/2 wide. There is no way the damage wil turn out. The other brakes look adequate in lining thickness, but the drums have a deep ridge in them so probably need them also. None of this is a hassle. I always put new brakes on something I'm going to operate for my own safety, as well as others. Have to get it apart first to ascertain what is needed. Rob