Standard

  rev.07/03/03

APS 102 – Laundry Appliances II

Course Description

Continues the development of knowledge and skills in diagnosis and repair of major household laundry appliances. Emphasis is placed on servicing washers. Topics include: component application and identification; diagnosis and repair of malfunctioning electrical, electronic and mechanical components; wiring diagram interpretation; and washer installation.

 

Competency Areas

Hours

Component Application and Identification

Class

2

Diagnosis and Repair of Malfunctioning Electrical, Electronic and Mechanical Components

D. Lab

2

Wiring Diagram Interpretation

P. Lab/O.B.I.

3

Washer Installation

Credit

4

 

 

 

Prerequisite:  APS 100

Corequisite:

 

 

Course Guide

 

Competency

After completing this section, the student will:

Hours

Class

D. Lab

P. Lab/

O.B.I.

COMPONENT APPLICATION AND IDENTIFICATION

8 

6

0

Water control components

Identify water control components of washers by type, output, and location.

 

 

 

 

Describe the function and operation of washer water control components.

 

 

 

 

Identify laundry appliance water drain and supply lines and connectors by type and size.

 

 

 

Tub assemblies

Identify washer belts, pulleys, clutches, brake systems, and idlers by type and size.

 

 

 

 

Describe the function and operation of washer clutches and brake systems.

 

 

 

 

Identify washer tub suspension assemblies.

 

 

 

 

Describe the operation of washer tub suspension assemblies.

 

 

 

 

Identify laundry appliance packings, gaskets, and seals.

 

 

 

 

Identify laundry appliance linkage and lever assemblies.

 

 

 

 

Describe the function of laundry appliance linkage and lever assemblies.

 

 

 

Transmission components

Identify laundry appliance shaft and bearing assemblies.

 

 

 

 

Discuss the function of laundry appliance shaft and bearing assemblies.

 

 

 

 

Identify laundry appliance shaft couplings, cam assemblies, and universal joints.

 

 

 

 

Discuss the function of washer shaft couplings, cam assemblies, and universal joints.

 

 

 

 

Identify laundry appliance direct drives and variable speed by type and location.

 

 

 

 

Describe the function of direct drives and variable speed drives.

 

 

 

DIAGNOSIS AND REPAIR OF MALFUNCTIONING ELECTRICAL, ELECTRONIC AND MECHANICAL COMPONENTS

2 

2

30

Water supply components

Determine the serviceability of laundry appliance circulation and drain pumps, float sensors, water supply controls, temperature switches, and water supply/drain lines and couplings.

 

 

 

 

Repair/replace laundry appliance circulation and drain pumps, float sensors, water supply controls, temperature switches, and water supply/drain lines and couplings.

 

 

 

Tub assemblies

Inspect laundry appliance belts, pulleys, and idlers for serviceability.

 

 

 

 

Tighten tub drive belts.

 

 

 

 

Replace washer belts, pulleys, and idlers.

 

 

 

 

Lubricate washer pulley and idler shafts and bearing.

 

 

 

 

Determine the serviceability of laundry appliance clutches, brakes, packings, gaskets, seals, linkages, and levers.

 

 

 

 

Repair/replace laundry appliance clutches, brakes, packings, gaskets, seals, linkages, and levers.

 

 

 

Transmission

Evaluate the serviceability of laundry appliance bearing and shaft assembly, shaft couplings and universal joints, cam assemblies, centrifugal switch, direct drive, and variable speed controls.

 

 

 

 

Repair/replace laundry appliance bearing and shaft assembly, shaft couplings and universal joints, cam assemblies, centrifugal switch, direct drive, and variable speed controls.

 

 

 

Electrical components

Inspect laundry appliance electrical cables for damage, wear, and continuity.

 

 

 

 

Inspect laundry appliance motors, solenoids, starter relays, timers, and safety interlocks for proper operation.

 

 

 

 

Repair/replace laundry appliance electrical cables, motors, solenoids, starter relays, timers, and safety interlocks.

 

 

 

WIRING DIAGRAM INTERPRETATION

8 

10

0

Wiring and pictorial diagrams

Identify symbols for components of washers.

 

 

 

 

Interpret washer schematic wiring and pictorial diagrams.

 

 

 

Timer sequence charts

Interpret washer timer sequence charts.

 

 

 

WASHER INSTALLATION

2 

2

0

Tools and materials

Using manufacturers' service manuals, select tools and equipment needed for washer installation.

 

 

 

Transporting

Identify manufacturers' procedure for transporting washers.

 

 

 

 

Use equipment hydraulic lifts, dollies, and appliance hand trucks to load, transport, and unload washers.

 

 

 

Installing washers

Install washers using manufacturers' instructions.

 

 

 

 

Suggested Resources

 

Books

Meyerink, G. Appliance servicing handbook. Englewood Cliffs, NJ: Prentice Hall.

Whirlpool Corporation. Reading and understanding wiring diagnosis for washers, L-49. LaPorte, IN: Author.

Whirlpool Corporation. Servicing washer mechanical and water systems above the baseplate, L-42. LaPorte, IN: Author.

Whirlpool Corporation. Servicing washer mechanical and water systems below the baseplate, L-41. LaPorte, IN: Author.

Whirlpool Corporation. Understanding laundry electrical controls and components, L-40. LaPorte, IN: Author.

 

Audiovisuals

Whirlpool Corporation. Reading and understanding wiring diagnosis for washers, L-49 (Videocassette No. LIT 677738). LaPorte, IN: Author.

Whirlpool Corporation. Servicing washer mechanical and water systems above the baseplate, L-42 (Videocassette No. LIT 677108). LaPorte, IN: Author.

Whirlpool Corporation. Servicing washer mechanical and water systems below the baseplate, L-41 (Videocassette No. LIT 677105). LaPorte, IN: Author.

Whirlpool Corporation. Understanding laundry electrical controls and components, L-40 (Videocassette No. LIT 603919). LaPorte, IN: Author.