VALVE GP 8P5807 - Caterpillar

Speed Tests
Make all tests with the hydraulic oil at the normal operating temperature. Also, make the tests when the tractor engine is at high idle rpm. Use a stop watch in order to find the travel time.If the travel time is not correct, check the following list:
Check pump efficiency.
Check the setting of the relief valve in the control valve.
Check the operation of the valve spools in the control valve.
Check the piston seals in the cylinders.Travel Time for the Apron Lift
Lower the scraper bowl to the ground and lower the apron. The time that is needed in order to lift the apron to the maximum height is 3.5 to 4.5 seconds.Travel Time for Lifting the Bowl
Lower the scraper bowl to the ground and lift the apron. Make sure that the bowl is empty. The time that is needed to lift the bowl from the ground to the maximum height is 3 to 4 seconds.Travel Time for the Ejector
Operate the ejector. Cycle the ejector several times. Then, move the ejector to the rear of the scraper bowl.The time that is needed in order to move the ejector from the rear position to the forward position in RETURN (detent) position is less than 30 seconds.The time that is required in order to return the ejector to the RETURN (override) position is 6 to 7 seconds.