Komatsu — SYSTEM TROUBLESHOOTING CHART

Maintenance - Section 42 06/06 0M4206 Page 42-16 Automatic Lubrication System PROBLEM POSSIBLE CAUSES SUGGESTED CORRECTIVE ACTION Pump Pressure Builds Very Slowly Or Not At All. No signal at solenoid. Check timer. Controller Does Not Operate. No electric power to controller. Turn on electric power to pump. Power LED must light, pump on LED must light when manual lubrication is pressed. Pump On LED Lights, But Load Connected To Terminals 3 & 4 Will Not Energize. Printed circuit board failure. Remove and replace. Load Connected To Terminals 3 & 4 Energized, But Pump On LED Does Not Light. Printed circuit board failure or key- pad failure. Remove and replace.

Bearing Points Excessively Lubricated. Controller memory mode is off. Switch controller memory mode to on. Injector output adjustment setting too high. Readjust to lower setting. Bearing Points Are Not Sufficiently Lubricated. Timer/controller cycle time setting too low. Set to longer cycle time or re-evaluate lubrication requirements. Injector output adjustment setting too low. Readjust injector output setting. Timer/controller cycle time setting does not deliver lubricant often enough. Set to shorter cycle time or re-evaluate lubrication requirements. System too large for pump output. Calculate system requirements per planning manual.