OICEW Task 7.4.A

Disassemble and reassemble an electric motor

MMA Method

In order to satisfy NVIC 17-14 Task 7.4.A , MMA students must:

NVIC Method

See NVIC method.

STCW Competence Knowledge, Understanding, and Proficiency

Maintenance and repair of electrical and electronic equipment

OICEW-B2 Maintenance and repair of electrical system equipment, switchboards, electric motors, generator and DC electrical systems and equipment

Detection of electric malfunction, location of faults and measures to prevent damage

Construction and operation of electrical testing and measuring equipment
Condition Behavior Standard

On a vessel of at least 1,000 HP, or in a laboratory or workshop,

the candidate disassembles and reassembles an electric motor.


All The assessment is required for all OICEW endorsements regardless of any limitations for propulsion mode and/or vessel equipment.

The candidate:

  1. Disassembles an AC or DC electric motor;

  2. Thoroughly cleans internal components;

  3. Makes continuity and ground tests of stator/rotor coils;

  4. Turns/grinds commutator and undercut mica if necessary in a DC motor;

  5. Checks, replaces, and fits brushes if applicable;

  6. Fits new bearings if necessary;

  7. Reassembles the motor;

  8. Sets brush tension if applicable;

  9. Tests run if possible; and

  10. Takes proper action to prevent safety and pollution violations.