2339 Describe Direct Current Electric Motors Used in Forklifts, and Repair Speed Control Systems

Explanatory notes

1The following legislation and amendments are required to be consulted and followed where applicable:

–Health and Safety in Employment Act, 1992.

2Reference to suitable tools and equipment means industry approved tools and equipment that are recognised within the industry as being the most suited to complete the task to a professional and competent manner with due regard to safe working practices.

3Because of the particular nature of this unit standard, it is essential that the practical assessment evidence is obtained from commercial jobs in the workplace under normal workplace conditions.

Outcomes and evidence requirements

Outcome 1

Demonstrate knowledge of direct current electric motors used in forklifts.

Rangeseries wound, shunt wound, compound wound.

Evidence requirements

1.1The construction and operating characteristics of direct current electric motors are described according to manufacturer’s specifications.

Rangearmature windings, field windings, brush gear, commutator, electrical circuit, current-torque characteristics, reverse rotation.

Outcome 2

Demonstrate knowledge of speed control systems.

Evidence requirements

2.1Methods of speed control are described according to manufacturer’s manual description.

Rangesupply voltage speed control and ancilliary equipment, field weakening.

Outcome 3

Repair faults in forklift direct current electric motors and speed control systems.

Rangemotors – one of – series wound, shunt wound, compound wound.

Evidence requirements

3.1Safe working practices are observed throughout the task.

Rangepersonal safety, safety of others, equipment safety.

3.2Suitable tools are selected and used that enable the electric motor to be removed and disassembled and components to be repaired and replaced.

3.3The motor is removed from the forklift, dismantled, and all necessary brush gear and end case positioning marks are established while the procedural steps laid down by the manufacturer are followed.

3.4The parts are cleaned and inspected for wear and damage and the results noted.

3.5Repairable components are returned to full serviceability.

3.6Non-repairable, faulty components are replaced with approved replacement parts.

3.7The motor is reassembled and refitted to the forklift in the sequence and manner prescribed by the manufacturer.

3.8Speed control faults are diagnosed by using suitable test equipment and the forklift operation restored as specified by the manufacturer.

This unit standard is expiring. Assessment against the standard must take place by the last date for assessment set out below.

Status information and last date for assessment for superseded versions

This CMR can be accessed at

Please note

Providers must be granted consent to assess against standards (accredited) by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.

Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards.

Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.

Consent requirements and an outline of the moderation system that applies to this standard are outlined in the Conesnt and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.