SPRING-RETURN 3527035 - Caterpillar

Probable Causes
Implement cutoff setting is too low.
The machine is being operated improperly.
The pilot system pressure is too low.
The control current to the solenoid is not correct.
The lift control lever and/or the position sensor may be worn or damaged
The main control valve is contaminated or damaged.
The makeup valve is sticking.Recommended Actions
Note: Care must be taken in order to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the machine. You must be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component that contains fluid. Dispose of all fluids according to local regulations.Implement Cutoff Setting Is Too Low
Refer to Testing and Adjusting, "Pump Performance (Implement) - Test" in this manual.The Machine Is Being Operated Improperly
Interview the operator in order to determine if the machine has been operating at stall conditions or near stall conditions.The Pilot System Pressure Is Too Low
Refer to Testing and Adjusting, "Relief Valve (Steering Pilot, Implement Pilot) - Test and Adjust" in this manual.The Control Current To The Solenoid Is Not Correct
Refer to Testing and Adjusting, "Position Sensor for the Lift Linkage (Electronic Technician) - Calibrate" in this manual.The Lift Control Lever And/Or The Position Sensor May Be Worn Or Damaged
Refer to Testing and Adjusting, "Position Sensor for the Joystick Control (Electronic Technician) - Calibrate" in this manual.The Main Control Valve Is Contaminated Or Damaged
Refer to Testing and Adjusting, "Main Control Valve (Electronic Technician) - Calibrate" in this manual.The Makeup Valve Is Sticking
If the makeup valve is sticking and not operating freely, there may be a pause in movement at the ground when lowering the blade. If the makeup valve leaks, "Down Pressure" may be weak. In the extreme, the implement may move UP, from external forces, with the control valve in the HOLD position.