DriveMaster® - Lesson 10: Preventive Maintenance (PM), © 2001 Horton, Inc.

	LESSON 10: PREVENTIVE MAINTENANCE (PM)

	10.1 Introduction		INDEX
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	Before performing work on the fan drive, be sure to follow good shop safety practices. Turn the vehicle ignition off, apply the vehicle's parking brake and block the vehicle's wheels. Start the vehicle's engine and build air pressure in excess of 90 PSI [6.21 bar]. Manually engage and disengage the fan drive. Observe the fan and fan drive from a distance. Look for vibration, fan blade contact, fan drive slippage, and fan drive operation. Most fan drive failures are caused by air leaks. With regular preventive maintenance (PM), the Horton DriveMaster fan drive will provide years of reliable service. PM is recommended at the weekly air-filter draining, and 25,000 mile [40,000 Km] PM.		Learning Objectives: • Identify general conditions to look for when observing fan drive operation. • Describe locations and methods for checking for air leaks. WARNING Be sure the engine is turned off and the fan has stopped turning before approaching fan area to prevent serious personal injury.

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INTRO | LESSON 1 | 2 | 3 | 4 | LAB | REVIEW | SERVICING | LESSON 5 | 6 | 7 | 8 | 9 | 10 | 11 | REVIEW | TEST