Level 13 of 15 · Maintenance lab

Gearbox running hot

Level 13 of 15 in the Maintenance lab: a free maintenance exercise at Advanced level. Overfilled with the wrong oil: prove it with a sample, then drain and refill.

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Goal

Overfilled with the wrong oil: prove it with a sample, then drain and refill.

Done when

The acceptance test marks the skills this level practises.

Lubrication
Oil sampling
Gearbox care

Skills

Lubrication
Oil sampling
Gearbox care

Before you start

Level 12, Control valve hunting, comes first. Do it first if the ideas are new to you.

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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

Intermediate

Levels 3 to 8

Advanced

Levels 9 to 15

Previous level 12Control valve hunting Next level 14Pump seal leaking

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

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