TUBE AS 3471292 - Caterpillar

Illustration 1 g00296207
Location of the Oil Filters for the Torque Converter and Transmission (1) Oil Filter for the Transmission. (2) Oil Filter for the Torque Converter.Transmission oil filter (1) and torque converter oil filter (2) are located on the left side of the engine compartment.
Illustration 2 g00296223
Oil Filter Construction (3) Passage. (4) Plug. (5) Passage. (6) Cover. (7) Oil outlet passage. (8) Passage. (9) Bypass valve spring. (10) Bypass valve spring. (11) Oil inlet passage. (12) Bypass valve. (13) Filter housing. (14) Filter element. (15) Retainer. (16) Retainer spring. (17) Plug.Pressure oil from the oil pump flows into filter housing (13) through inlet passage (11) . The oil fills the space between filter element (14) and the inside of housing (13) . During normal operation, the oil flows through filter element (14) to passage (8) . The oil then flows through outlet passage (7) to the remainder of the hydraulic system. The filter element stops any debris that is in the oil.If the filter element becomes full of debris, then the restriction to the oil flow will cause an increase in pressure inside the filter. The pressure oil fills passage (3) . This causes bypass valve (12) to move against the force of springs (9) and (10) . The oil then flows past the open bypass valve and through outlet passage (7) to the hydraulic oil reservoir in the case of the output transfer gear. When the oil does not flow through the filter element, the debris in the oil will cause damage to other components in the hydraulic system.Correct maintenance must be used to ensure that filter elements (14) do not become full of debris. This would stop the flow of clean oil to the hydraulic system.During normal operation, the end of bypass valve (11) is in contact with a switch plunger. This keeps the filter bypass switch for the torque converter in the OFF position.
Illustration 3 g00296208
EMS Electronic Display Module for the Power Train (18) Indicator for the Torque Converter Oil Filter.Bypass valve (12) moves away from the switch plunger when the bypass valve opens. The switch plunger moves away from the switch contacts. The switch plunger then opens the circuit. This indicates that the filter element is plugged and that the bypass valve is open.When oil is not flowing through the filter, a light on the right side EMS panel turns ON. Indicator light (18) turns ON for blocked flow through the torque converter oil filter.