With the arrival of hot weather, livestock ventilation fans are working harder than ever. But how efficiently are they doing their job? A properly maintained fan can save money on the electric bill, and put dollars in the pocket, says University of Delaware extension agricultural engineer Dr. Jim Scarborough. Because these fans operate in a very dusty at mosphere, that dust coats their motors, blades and shutters, making them work harder than necessary. And this costs money. To illustrate his point, the specialist cites a recent field study at the University of Delaware Agricultural Experiment Station by power and machinery specialist Dr. Norman E. Collins, which shows that inadequate main tenance is the leading cause of reduced fan performance. Before cleaning, one fan in Collins’ study discharged 6256 CFM (cubic feet per minute) of air using 912 watts; after cleaning, it ALLIS-CH AIMERS 6070 TRACTOR of row-crop power,., plus Peace of Mind. 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Scarborough recommends that producers service fans routinely during periods of heavy use. To avoid adverse efforts on poultry or livestock during hot weather, he suggests cleaning and servicing fans between flocks or on a cool day, using the following procedures; First, shut off power at the electric breaker box to the fan to be cleaned. If the breaker is hard to find, this would be a good time to mark each breaker or fuse circuit. Then check wires in the breaker box for possible rodent damage and clean out any material that may have accumulated there. If the box is especially dirty or filled New show MIND. EE, INC. Rising Sun, Md 301-398-6132 SHARTIESYIUE FARM SEN. Hamburg, Pa. 215-488-1025 B.HH. f jjjjd EQUIP., Annville. Pa 717-867-2211 Flemington, N.J 201-782-4242 MY H. BUCK, INC. Ephrata, Pa. 717-859-2441 CJ. WONSISLER BROS. Quakertown. 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He suggests using a shop vacuum instead of a household vacuum to avoid complaints. To remove a heavy build-up of dirt, the specialist suggests using a plastic windshield scraper. Take care not to nick or gouge the blades when scraping them. Such damage can cause a dynamic imbalance in the blades and increase fan noise and vibration during operation. For a thorough cleaning, use a high pressure sprayer to wash the fan unit provided the motor is totally enclosed in the housing. Otherwise, take the unit apart and clean the motor separately. Once the fan is clean, lubricate it HUSKS IMS. MC. Westminster, Md 301-848-6313 VERNON L STUP CO. Frederick, Md. 301-663-3185 WERTZ CARAGE, INC. Lineboro, Md. 301-374-2672 COCHRAN FARM EQUIPMENT Somerset, Pa 814-445-4189 JACK SHEARER EQUIP. Johnstown, Pa 814-266-9721 according to the manufacturer’s guidelines. Don’t use too much oil, because any excess will attract dust and may get into the motor windings. Do not oil shutter hinges, as they’ll become sticky when dust accumulates. Instead, use graphite lubricant or a few drops of antifreeze. If the fan is belt-driven, proper belt maintenance and adjustment is very important, Scarborough Says. Many belt-driven fans use the motor weight as a self tensioning device. Check the hinges on the motor mount or counter balance beam to make sure they operate freely. Apply a small amount of graphite lubricant if the hinges are stiff. On fixed-belt drive units, check the belt for proper tension by depressing it with your finger. It should be possible to depress it the same distance as it is thick. Replace a badly worn belt, but remember to readjust it in a couple Dr. Scratch Spring Assembly Spring Assembly Mounting Bracket Guaranteed against defective material and workmanship for 1 year. • New patented rubber scratching surface makes animals want to rub, dispen sing effective insecticide down through hair, directly to hide. Grooms cattle well. • One installation for whole season. Provides effective control of horn flies, both bloodsucking and biting lice and aids in reducing face fly populations and other pests. • Weather conditions have no effect on the applicator or application. Even though dust becomes wet it does not effect the efficacy of the insecticide. AARON S. GROFF & SON FARAA & DAIRY STORE m RD 3, Ephrata, PA 17522 (Hinkletown) HWI Phone: (717) 354-4631 Store Hours: Mon., Thurs. & Fri. 7 A.M. to 9 P.M. lues. & Wed. 7 A.M. to 5 P.M., Sat. 7 A.M. to 4 P.M. of weeks, as it will stretch after installation. Having cleaned and serviced the fan, replace any screens or guards which were removed and put the unit back into operation. Mark the date on the fan housing with a felt tipped pen, as a reminder of when it was serviced. Scarborough says producers should check fans monthly during periods of heavy use and clean them as needed. 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