Mechanical Maintenance Applications > Mechanical Drive Maintenance

Mechanical Drive Maintenance

Course Number: 841

The Mechanical Drive Maintenance textbook covers alignment, particularly coupling alignment. It includes installation and maintenance of mechanical drives, from chain drives to enclosed gear drives.

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Recommended Contact Hours – 8

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Table of Contents

Chapter 1: Chain Drives

Topics: Installing and aligning shafts; Mounting the drive sprockets and chain; Test running; Lubrication; PM; Chain storage; Troubleshooting; Safety

Learning Objectives:

  • List four types of chain drives.
  • Describe the procedure for aligning the driving and driven shafts.
  • Distinguish between bored sprockets and bushed sprockets and tell how each is mounted.
  • Tell how a drive chain is mounted on the sprockets.
  • List four methods of lubrication for chain drives.
  • Explain both no-load and full-load test running procedures.
  • Describe the causes of fatigue breaks, tensile breaks, rapid chain wear, roller wear, and side plate spreading.

Chapter 2: Belt Drives

Topics: Installing and aligning drives; Mounting sheaves and pulleys; Installing and adjusting V-belts; Idler sheaves; Flat, positive belt drives; Maintenance

Learning Objectives:

  • List the three general types of belt drive and explain how they work.
  • Tell how sheaves and pulleys are mounted and aligned on their shafts.
  • Explain why all the belts in a multi-belt drive must be replaced at the same time.
  • Describe two ways of taking up slack in a stretched V-belt.
  • List three ways of splicing the ends of a flat belt together.
  • Differentiate between the way positive-drive belts and other types of belt transmit power.

Chapter 3: Open Gear Devices

Topics: Aligning and preparing shafts; Handling and mounting gears; Lubricating open gearing; Preventive maintenance; Troubleshooting; Safety

Learning Objectives:

  • Explain why open gearing requires special provisions for feeding lubricating oil to its parts.
  • Describe how to align parallel shafts, intersecting right-angle shafts, and nonintersecting right-angle shafts.
  • Describe the procedure for aligning worm gearing.
  • List some of the problems a visual inspection of gearing can uncover.
  • Describe the appearance and causes of wear, abrasion, corrosion, scoring, pitting, spalling, cold flowing, fatigue breaks, and cracked rims and webs.

Chapter 4: Enclosed Gear Drives

Topics: Preparing the foundation; Installation; Lubrication; Test running; PM; Troubleshooting

Learning Objectives:

  • Tell how an enclosed gear drive should be mounted on the floor.
  • Tell how an enclosed gear drive should be mounted on the framework of a driven machine.
  • Describe the two methods of lubrication used in enclosed gear drives.
  • Explain what should be done during the initial run-in, the one-week check, and the thirty-day check.
  • List four steps you should take to protect an enclosed gear drive that is to be put into storage.
  • Identify typical nameplate data.

Chapter 5: Drive Couplings

Topics: Installing and aligning shaft couplings; Expansion allowance; Lubrication; No-load testing; Installing universal joints; PM

Learning Objectives:

  • List three purposes of a coupling.
  • List the three basic types of coupling.
  • Explain how to check both the angular and the parallel alignment of shafts.
  • Tell how a dial indicator is used in precision coupling alignment.
  • Calculate shim thickness required to align couplings in an angular plane.
  • Distinguish between couplings that need lubrication and those that do not.
  • Describe how shaft couplings, spacer couplings, floating shaft couplings, and universal joints are installed.

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