Not much to a evaporative cooler.
Power source
Fan motor....check belt--should deflective roughly 3/4". A few drops of oil if bearings have oil caps
Fan..clean, rotates freely & oil if it has oil caps
Pump.....suction screen clear. Water flows thru dispersing tubing onto drip trays and soaks pads
Sufficient water level.....check routinely due to 'manual' supply
Roof installation with manual water..I'd pickup a float valve and install it with soft copper tubing water supply line and install an over flow tube with garden hose connected to drain off to ground VS manually adding water.
Those items available at Home Depot/Lowes/ACE
Old swamp cooler trick........and it works
Drop a bar of IVORY Soap in water. It helps with odor, lubes pump and helps wet pads.
Should do well up there in the high desert.
Lived in Baldy Mesa and only used swamp cooler for house
Just installed one couple weeks ago in current home....house is well insulated (6" walls) and can get temp down to 68*F (85*F outside) course the humidity is about 3%
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31