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| Illustration 1 | g01443538 |
The oil filters for the power train are located above the right rear wheel. (1) Oil filter for the transmission charging section of the pump (2) Oil filter for the torque converter charging section of the pump | |
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| Illustration 2 | g01445310 |
The power train oil filters and pressure taps are accessible from the machine platform. (1) Oil filter for the transmission charging section of the pump (2) Oil filter for the torque converter charging section of the pump (3) Pressure tap (4) Pressure tap | |
The power train oil filters are located above the right rear wheel. The filters are accessible by opening an access plate on the platform.
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| Illustration 3 | g01445412 |
Oil filter construction (5) Bypass valve spring (6) Bypass valve (7) Plug (8) Retainer (9) Filter housing (10) Filter element (11) Passage (12) Oil outlet passage (13) Passage (14) Oil inlet passage | |
The power train oil filters filter any debris that is in the power train oil system.
If the filter element becomes plugged, then the restriction to the oil flow will cause an increase in pressure inside the filter. The pressure oil fills passage (13). This causes bypass valve (6) to move against the force of spring (5). The oil then flows past the open bypass valve and through outlet passage (12) to the hydraulic oil reservoir in the output transfer gear case. 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 (10) do not become full of debris. This would stop the flow of clean oil to the hydraulic system.
Both of the filters for the power train have a filter bypass switch. The filter bypass switches are wired in parallel and the switches are monitored by the VIMS. The Advisor display will display a message when the VIMS detects restrictions in one of the filters. If one of the two filters is plugged, the Advisor display will display a message.
The Advisor display will display the following when the power train oil filters are working properly:
- "Front Trans Oil Fltr St-----OK" (oil filter for torque converter charging )
- "Rear Trans Oil Fltr St-----OK" (oil filter for transmission charging)
The Advisor display will display the following when the bypass valve of one of the power train oil filters has opened:
- "Front Trans Oil Fltr St-----Plugged" (oil filter for torque converter charging)
or
- "Rear Trans Oil Fltr St-----Plugged" (oil filter for transmission charging)
The message will be either a warning category 2 or a warning category 3. If the filters become plugged for more than 30 seconds and the transmission oil temperature is above 65 °C (149 °F), the warning category will be a warning category 2. If the filters remain plugged for more than 120 seconds and the transmission oil temperature is above 65 °C (149 °F), the warning category will change from a warning category 2 to a warning category 3. The "Front Trans Oil Fltr St-----Plugged" message or the "Rear Trans Oil Fltr St-----Plugged" message will be displayed when one of the power train oil filters become plugged. Both of the messages will be shown on the Advisor display if both power train oil filters are plugged. The first line of the Advisor display will display the message. Instructions for the operator will be displayed on the second line of the Advisor display.