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| Illustration 1 | g00465111 |
Location of the check valve (1) Check valve | |
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| Illustration 2 | g00465112 |
Manifold (Power train oil pump) (2) Retainer (3) Check valve (4) Passage to the priority valve (5) Manifold (6) Passage (7) Passage (8) Passage | |
Check valve (3) is mounted on manifold (5). Manifold (5) is bolted to the power train oil pump. Passage (6) contains pressure from the torque converter and lubrication section of the power train oil pump. Passage (8) contains pressure from the section of the pump that operates the controls. Check valve (3) allows oil from passage (6) to supplement the flow from the section of the pump that operates the controls.
The flow from passages (6) and (8) ensures that the pressure will be maintained to the brakes and to the transmission controls. This process occurs during conditions that require high flow.
Check valve (3) opens when the pressure from passage (6) is greater than the pressure from passage (8). This process sends reserve pressure to the controls when the pressure is too low.
Check valve (3) opens when the priority valve is in the priority mode. Check valve (3) does not allow the oil to flow from passage (8) to passage (6).