D7R Track-Type TractorPower Train Caterpillar


Transmission Oil Filter

Usage:

D7R 2EN



Illustration 1g00487991

Location of transmission oil filter




Illustration 2g00487989

Components of the transmission oil filter

(1) Bypass valve

(2) Spring

(3) Inlet passage

(4) Outlet passage

(5) Filter element

(6) Housing assembly

Oil from the pump goes into the filter housing through inlet passage (3) . The oil fills the space between the inside of housing assembly (6) and filter element (5) .

During normal operation, the oil goes through the filter element and out through outlet passage (4) to the remainder of the power train hydraulic system. Filter element (5) stops any debris that is in the oil.

If the filter element becomes full of debris, the restriction to the flow of oil causes a pressure increase inside the filter. The oil fills inlet passage (3) . The pressure then causes bypass valve (1) to move against the force of spring (2) . The oil then flows through the open bypass valve and to the remainder of the power train hydraulic system.

When the pressure of the oil exceeds the bypass valve setting of 340 ± 20 kPa (50 ± 3 psi), the oil bypasses filter element (5) .


NOTICE

When the oil does not go through filter element (5) , the debris in the oil will cause damage to other components in the power train hydraulic system.


Correct maintenance must be used in order to make sure that filter element (5) does not become full of debris. A filter element that is clogged with debris will stop the flow of clean oil to the power train hydraulic system.

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