PRESCREENER GP 2Y9411 - Caterpillar

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine.To prevent possible injury, perform the procedure that follows before testing and adjusting the power train.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
If the engine is still running, stop the engine.
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Remove four bolts (3) and washers.
Remove both footrests (1) .
Remove floormat (2) .
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Remove six bolts (4) and washers.
Remove access panel (5) .
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The pump is installed on the machine.
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Remove cap (7) from the pressure override valve (POR valve) (6).
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Loosen locknut (8) .
Turn adjustment screw (9) in order to adjust the pressure. Turn the adjustment screw counterclockwise in order to decrease the pressure. Turn the adjustment screw clockwise in order to increase the pressure.Note: One full turn is equal to approximately 9500 kPa (1400 psi).Note: When you adjust the POR valve in order to decrease the pressure, turn the adjustment screw for an additional one quarter turn past the estimated adjustment setting. Then, turn the adjustment screw clockwise for one quarter turn.
Maintain the position of the adjustment screw as you tighten the locknut.
Install the access panel. Do not install the bolts and washers.
Perform the stall test again. Refer to Testing and Adjusting, "Hydrostatic Stall - Test".
If the pump stall pressure is not within specifications, repeat Step 6 through Step 12 until the pump stall pressure is within specifications. If the pump stall pressure is within specifications but the stall rpm is not within specifications, check the engine. Refer to Systems Operation, Testing and Adjusting, SENR6457.
If the stall rpm and the pump stall pressure are within specifications, remove the access panel.
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Install a new cap (7) onto POR valve (6) .
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Install access panel (5) .
Install six bolts (4) and washers.
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Install floormat (2) .
Install footrests (1) .
Install four bolts (3) and washers.