Automatic Washer, how it works? Washing Machine Mechanical System continue…

When the solenoid is energized, the plunger is pulled upward by magnetic force of the solenoid coil, and the pin travels back and forth in the upper slot of the spin cam bar. This action pulls the spin cam bar backward from the basket clutch shaft, which allows the bar to slide downward toward the clutch lining.

A tension spring forces the brake yoke downward, pressing the basket drive clutch disc against the clutch lining on top of the basket drive pulley. The clutch lining is now engaged, and the basket drive disc and the washer basket begin to rotate and spin. As the basket gets up to full-speed momentum, from power transmitted from the washer drive motor, the basket continues to spin for the time span of the spin cycle.

When the solenoid is de-energized, end of cycle, or opening washer lid, the plunger drops into the lower slot of the spin cam bar. This action pushes the end of the bar into the basket clutch shaft and forces the brake yoke upward against the force of the tension spring to disengage the clutch from the clutch lining. As the brake yoke is forced upward, it closes the distance between the brake drums and the brake linings, which assures that the washer basket will come to a quick and smooth stop.

Water Inlet Valve

Water enters the washer outer tub through the water inlet valve, which mixes the hot and cold water. Water inlet valves used on automatic washers are operated by solenoid coils that permit hot and cold water to enter the washer outer tub. There are two basic water inlet valves used in the manufacture of automatic washers: The single solenoid valve and the double solenoid valve.

The single-solenoid valve has only one function — mixing the incoming hot and cold water for the desired wash and rinse temperatures. This type of valve is most commonly used in low priced automatic washers.

The double-solenoid valveoffers three temperature selections: hot, warm, and cold. Energizing the cold-water solenoid allows cold water only to enter the washer outer tub. The hot-water solenoid allows only hot water. When both water inlet valve solenoids are energized, both hot and cold water enter the outer tub — which results in a warm wash. This type of valve is most commonly used by washer manufacturers on their middle and top-of-the-line model washers.

Washer Water Pump

The water pump in an automatic washer operates continuously while the washer is in the ON position. The water pump recirculates wash water by syphoning it from the bottom of the outer tub and channeling it through an inlet at the side of the tub. On command, the water pump also pumps out the wash water. It receives its power from the washer drive motor via a drive belt. Most automatic washers use a water pump that rotates the drain impeller in only one direction for both the recirculation and discharge of the wash water. The recirculation impeller and the drain impeller are located at opposite ends of the pump body. The impeller shaft drives both the recirculating and the drain impeller.

Filters

Several types of lint filters are used in different makes of automatic washers. All filters, regardless of type, are designed to strain and remove lint and other particles that are loosened from the clothing by the washer during the agitation cycle. On some models, the filter can be removed for cleaning and removing the lint on the other models (self-cleaning type), you must dispose of the filter and install a new one when a restriction forms in the filter and it becomes clogged.

Filter Traps

Some automatic washers use a filter trap assembly. The purpose of this trap is to catch foreign objects and debris that could cause damage to the water pump or filter.

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