18Horton Fan Inspection Tech Tip

MIDWESTWHEEL.COM IOWA MISSOURI DES MOINES 1436 E. Ovid Ave. office 515.265.1491 fax 515.265.4120 parts fax 800.314.4329 parts 800.888.0248 CEDAR RAPIDS 200 50th Ave. S.W. main 319.365.4453 fax 319.365.6327 parts fax 877.706.6085 parts 800.332.5435 DAVENPORT 8502 Northwest Blvd. main 563.322.2671 fax 563.322.5940 parts 800.553.1886 SIOUX CITY 1819 4th St. main 712.252.7969 fax 712.252.6149 parts 800.943.3534 CLEAR LAKE 840 Hwy. 18 W. main 641.357.7101 fax 641.357.8190 parts fax 800.548.9674 parts 800.397.5630 TRUCK PARTS SUPER STORE TM KANSAS CITY 5801 E. Front St. main 816.471.1552 fax 816.471.0813 parts 800.821.7402 JOPLIN 2424 Stephens Blvd. main 417.717.6022 fax 417.782.7126 parts 866.318.9111 © 2014 Horton Holding, Inc. All rights reserved . Form # 23094-A-0114 Inspection Procedures 4. Check the Fan Drive Bearings While Disengaged All DM Advantage ® and DriveMaster ® Fan Drives are spring-engaged/air-disengaged. For the following procedures, apply air pressure to the fan drive. a) Remove the belts and check both the pulley and clutch pack bearings. b) Rotate the pulley in both directions (independent from the clutch pack). c) Check for smooth rotation of the fan in both directions (independent from the pulley). Maintenance Procedure: If the bearings are rough, repair the fan drive with the appropriate Horton repair kit, or with a remanufactured Horton fan drive or new fan drive. 5. Magnet Inspections for Two-Speed Fan Drives While air is applied to the fan drive, check the two-speed magnetic coupling mechanism. a) Rotate the fan and clutch pack in both directions (independent from the pulley). b) Check for damaged or broken magnets and for interference between the magnet assembly and the FMFD. Maintenance Procedure: If the magnet assemblies are damaged or broken, repair the fan drive with the appropriate Horton repair kit, or with a remanufactured Horton fan drive or new fan drive. 6. Visually Check for External Signs of Wear or Damaged Components Look for an obstructed, cracked or damaged fan shroud and/or ring by doing the following: a) Check for belt slippage by looking for a polished belt pulley on the fan drive or accessory drives. b) Check for external damage to the fan drive components, including the sheave grooves, fan studs, etc. c) Examine the general condition of the belts and belt tensioner. Maintenance Procedure: Correct the interference problem and replace belts and tensioners as needed. 7. Visually Check for Damaged Fan Components Any of the defects listed below can cause the fan to become unbalanced or unsafe, possibly resulting in premature fan drive bearing wear, fatigue damage or separation at the fan or fan blades. Check for: a) Cracked fan blades. b) Excessive tip wear. c) Missing balance weights (rivets). d) Cracked fan center disk. e) Bent, deformed metal blades. Maintenance Procedure: Replace the fan with a Horton fan, if any of the above defects are present. For further maintenance information see Horton literature #22901, warranty component evaluation for Horton on/off fan clutch and hub. DM Advantage ® and DriveMaster ® On/Off and Two-Speed Fan Drives and Horton Fans *ISO/TS 16949, ISO 14001 and ISO 9001 Certified **ISO 14001 and ISO 9001 Certified USA Minnesota, USA** South Dakota, USA* Indiana, USA* +1 (651) 361-6400 1 (800) 621-1320 info@hortonww.com Canada Quebec, Canada +1 (514) 250-8970 info@hortonww.com Mexico Edo. Méx., México +52 (55) 5360-150 contacto@hortonww.com June 9, 2017 (18Horton Fan Inspection Tech Tip)