VALVE GP-CONTROL 8J5903 - Caterpillar

Ejector Kickout Valve
The ejector kickout valve is in the end of the valve spool for the ejector (in the control valve).To check the pressure setting of the kickout valve, use the test equipment installed in the pump connection, that was used in the test for the relief valve in the control valve.With the engine running at high idle rpm and the floor OPEN, move the control lever for the ejector to the RETURN detent position. Look at the pressure gauge when the floor is closing. When the pressure reading on the gauge is 900 100 psi (6200 690 kPa), the ejector kickout valve must open and move the control lever for the ejector to the HOLD position.
SCRAPER CONTROL VALVE (Seen From the Rear)
1. Housing. 2. Valve. 3. Air line.
KICKOUT VALVE IN EJECTOR VALVE STEM
1. Spring housing. 4. Screw.If it is necessary to change the pressure setting of the ejector kickout valve, disconnect air line (3) from valve (2) on the end of spring housing (1) for the ejector valve stem and remove the valve.Use a .12 inch hex wrench through the hole in the end of spring housing (1), where the air valve was removed, and turn the screw either clockwise to increase or counterclockwise to decrease the pressure setting of the ejector kickout valve. One-half turn of screw (4) changes the pressure setting of the valve approximately 135 psi (930 kPa).Install air valve (2) on the end of housing (1). The torque for the valve is 55 5 lb. ft. (75 7 N m). Connect air line (3) to valve (2).Elevator Chain Adjustment
Hydraulic chain adjusters, one on each side of the elevator frame, are used when it is necessary to remove excess slack from the elevator chains. Open the covers, on the frame, over the grease fitting on the hydraulic chain adjusters.
HYDRAULIC CHAIN ADJUSTER
1. Fitting.Use a grease gun to put grease in the adjusters at fitting (1). Do not loosen the clamps on the yokes. The correct slack is 5 to 8 in. (127 to 203 mm) measured between the chains and the lower guide rollers. The distance between the lower idler and the sprocket on each side of the elevator frame must be the same.If the chain adjusters are near maximum extension, retract the adjusters and remove two links from each chain. Install one offset link. Loosen fitting (1) one turn to retract adjuster.
MEASURING CHAIN ADJUSTMENT
Do not loosen the fitting or the bleed valve more than one turn to retract the hydraulic adjusters.
Testing And Charging The Accumulator (Later Machines)
7S5437 Nitrogen Charging Group.Be sure the elevator has been stopped for a minimum of five minutes. This is enough time to let the piston push the oil out of the accumulator. The piston must be on the bottom of the cylinder to be sure that the pressure of the nitrogen charge is correct.
ELEVATOR REVERSE VALVE
1. Accumulator. 2. Cap (on valve assembly). 3. Reverse valve.The accumulator (1), in an oil line to the elevator hydraulic