DriveMaster® - Lesson 1: Fan Drive System, © 2001 Horton, Inc.

REVIEW - FAN DRIVE SERVICE

REVIEW - QUESTIONS and ANSWERS

INDEX

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1. DriveMaster fan drive parts that are visible externally are the fan mounting disc, friction liner, air chamber seal, and journal bracket.
True False
2. The two most commonly replaced parts are the fan mounting disc and friction liner.
True False
3. A DriveMaster Seal Kit would be the most appropriate choice if:
      an air leak has developed inside the fan drive
      the bearings are running rough or if the fan drive needs to be completely rebuilt
      the fan mounting disc is damaged
      the friction liner is worn.
4. A DriveMaster Super Kit would be the most appropriate choice if:
      an air leak has developed inside the fan drive
      the bearings are running rough or if the fan drive needs to be completely rebuilt
      the fan mounting disc is damaged
      the friction liner is worn.
5. A DriveMaster Friction Disc Kit would be the most appropriate choice if:
      an air leak has developed inside the fan drive
      the bearings are running rough or if the fan drive needs to be completely rebuilt
      the fan mounting disc is damaged
      the friction liner is worn.
6. A DriveMaster Friction Liner Kit would be the most appropriate choice if:
      an air leak has developed inside the fan drive
      the bearings are running rough or if the fan drive needs to be completely rebuilt
      the fan mounting disc is damaged
      the friction liner is worn.
7. Before removing the fan drive from the vehicle, it is important to:
      turn the ignition off
      apply the parking brake
      block the wheels
      bleed the air from the reservoir
      all the above
8. Applying 80-120 PSI [5.44-8.16 bar] air pressure to the fan drive air inlet will aid in removing the fan drive mounting disc.
True False
9. The jack bolt is loosened by turning it counter-clockwise using a C55 Torx bit.
True False
10. Pitting or blistering on the inside contact surface of the fan mounting disc is cause for replacement.
True False
11. The cage nut from the repair kit keeps the spring housing / piston assembly together during disassembly.
True False
12. Before removing the friction liner, air pressure should be:
Off On
13. The air chamber is located directly underneath the spring housing / piston assembly.
True False
14. Moisture inside the air chamber is normally just routine condensation.
True False
15. When checking the air chamber seals, wear on the face seal may indicate dirt exists in the air system.
True False
16. The air chamber cap retaining ring must be removed before removing the air chamber cap.
True False
17. First the bearing nut is removed, then the sheave can be removed from the journal bracket.
True False
18. The chevron markings on the bearings must be aligned to form an arrow.
True False
19. The chevron markings on the bearings need to be aligned when using spacers.
True False
20. New bearings must be disassembled and lubricated.
True False
21. When installing the bearings, only the outer races should be pressed on.
True False
22. When replacing the air cartridge, the curved side of the beveled retaining ring faces the cartridge.
True False
23. Eye safety protection should be used when removing the retaining ring of the air cartridge.
True False
24. The O-rings of a new air cartridge assembly are lubricated:
before installation after installation.
25. When replacing the bearing nut, the hex faces down and the relief of the nut points away from the journal bracket and bearings.
True False
26. The friction liner should be properly lubricated before installation.
True False
27. When reinstalling the spring housing / piston assembly, the "V" of the main air chamber seal faces down in the sheave.
True False
28. The button head screws should be alternately and evenly tightened when replacing the friction liner.
True False
29. When reinstalling the spring housing / piston assembly, grease should be applied:
      deep into the air chamber
      along the edge of the friction liner
      only in the immediate area of the air chamber seal.
30. When lubricating the air chamber seal, use only the amount that fully covers the seal.
True False
31. When installing the fan mounting disc, air must be blocked from the air chamber to remove the cage nut and to ensure proper jack bolt torque.
True False
32. When removing or installing the DriveMaster, you should protect the radiator.
True False
33. Belts should be tensioned according to:
      fan drive specifications
      industry standards
      manufacturer or vehicle specifications
34. A belt tensioner should be used to determine proper belt tightness as listed in the manufacturer or vehicle specifications.
True False
35. Air leaks are the #1 cause of fan drive problems.
True False
36. When observing fan drive operation, it is a good idea to look for vibration, fan blade contact, or fan drive slippage.
True False
37. The fan drive air filter should be drained and inspected for contaminants:
weekly monthly annually
38. 25,000 mile (40,000 Km) PM requirements include checking the fan drive bearings, friction disc facing, wiring, overheating, and proper engagement and disengagement.
True False
39. If an air leak is not fixed the fan drive may start to slip and overheat.
True False
40. Select the diagram below (A or B) that correctly indicates at least six places you should check for air leaks.

A
B
41. For the fan drive system below, select the diagram (A or B) that correctly indicates where a jumper wire would be placed to manually test fan drive engagement.

A
B

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