GENERATOR GP 5Y1179 - Caterpillar

is too low.Problem 8: All implement functions are sluggish.Probable causes:
The oil level is too low.
The implement pump is worn or damaged.
The main relief valve setting is too low.
The selector and pressure control valve in the pilot system is faulty.
The oil in the hydraulic system is contaminated.Problem 9: The implement functions are erratic or intermittent.Probable causes:
The oil level is too low.
There is air in the hydraulic oil.Note: A problem with air in the hydraulic oil must be corrected before the hydraulic system will operate at normal temperatures. There are two conditions that cause air to be in the hydraulic oil:
Return oil is flowing into the hydraulic oil tank above the level of oil that is in the tank.
There are leaks in the oil suction line between the hydraulic pump and the tank.
The implement pump has too much wear.
The rocker plate on the pilot control valve is not adjusted correctly.
The selector and pressure control valve in the pilot system is worn or damaged.
The main control valve is contaminated or damaged.
The load check valve is not closing because the spring is weak or broken, or because there is dirt or debris in the check valve.Problem 10: There is too much lift cylinder drift.Cylinder drift - Cylinder drift is a creeping motion of the implement cylinder with the pilot valve in the HOLD position.Probable causes:
The rocker plate on the pilot control valve is not adjusted correctly.
The ride control solenoid valves are worn or damaged.
The piston seals and/or the lift cylinders are worn.
A component of the main control valve is worn or damaged.
The load check valve is not closing because the spring is weak or broken or because there is dirt or debris in the check valve.Problem 11: The hydraulic force is too low when the tilt control lever is moved to the TILT BACK position or to the DUMP position.Probable causes:
The machine is being operated incorrectly.
The rocker plate on the pilot control valve is not adjusted correctly.
The selector and pressure control valve in the pilot system is worn or damaged.
The piston seals and/or the lift cylinders are worn.
The main control valve is contaminated or damaged.
The pilot valve is contaminated or damaged.
The main relief valve setting is too low.Problem 12: The lift cylinders collapse during the lift operation.Collapse - Collapse is a sudden drop of the implement cylinders during normal operation.Probable causes:
The selector and pressure control valve in the pilot system is worn or damaged.
The ride control solenoid valves may be worn or damaged.
The nitrogen precharge pressure in the ride control accumulator is too low.
The piston seals and/or the lift cylinders are worn.
The main control valve is contaminated or damaged.
The makeup valve is sticking.
The load check valve is not closing because the spring is weak or broken, or because there is dirt or debris in the check valve.Problem 13: There is low power to the implements.Probable causes:
The machine is operating above the intended capacity.
The engine power is too low.
The implement pump has too much wear.
The rocker plate on the pilot valve is not