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Level 6 of 15 · Maintenance lab

Air compressor not loading

Level 6 of 15 in the Maintenance lab: a free maintenance exercise at Intermediate level. It runs but the pressure never climbs: an open unloader coil.

IntermediateNot started

Goal

It runs but the pressure never climbs: an open unloader coil.

Done when

The acceptance test marks the skills this level practises.

  • Compressed air
  • Coil continuity
  • Stored energy

Skills

  • Compressed air
  • Coil continuity
  • Stored energy

Before you start

Level 5, Level transmitter reading wrong, comes first. Do it first if the ideas are new to you.

Free, in your browser, nothing to install. Your work is saved on this device. Updated 1 Nov 2026.

15 levels

Levels in the Maintenance lab

Keep a small plant running: find faults with real instruments, fix them safely and record the work in a CMMS.

Foundation

Levels 1 to 2
  1. Start Your first shift
  2. Start The PM route

Intermediate

Levels 3 to 8
  1. Start Pump P-101 vibrating
  2. Start Conveyor motor tripping on overload
  3. Start Level transmitter reading wrong
  4. Start Air compressor not loading
  5. Start Air handler belt squeal
  6. Start MCC feeder hot lug

Advanced

Levels 9 to 15
  1. Start Drive overcurrent trip at start
  2. Start Motor insulation low after wash-down
  3. Start Hydraulic press slow
  4. Start Control valve hunting
  5. Start Gearbox running hot
  6. Start Pump seal leaking
  7. Start Plan the week

Part of the Maintenance lab

Keep a small plant running: find faults with real instruments, fix them safely and record the work in a CMMS.

Feeds these internships (training, not employment): Commissioning and Maintenance, Instrumentation and Process Control, Control Panel Design and Wiring.

About the Maintenance lab

Ready for Air compressor not loading?

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