BRACKET AS 5625499 - Caterpillar

Poor Coolant Flow
Probable Root Causes:* Restriction of coolant flow through the Aftercooler core* Faulty Jacket water pump* Faulty Aftercooler pump* Coolant and/or flow incorrect* Scale buildup Perform the following tests in order:1. Restriction Of Coolant Flow Through The Aftercooler CoreClean and flush the Aftercooler cores.2. Faulty Jacket Water PumpRepair the jacket water pump as necessary.3. Faulty Aftercooler PumpRepair the faulty Aftercooler pump as necessary.4. Coolant and/or Flow incorrectSystem incorrectly balanced. Repair as needed.5. Scale BuildupClean cooling system.SCM Will Not Reset
Probable Root Causes:* Electrical Connector* Faulty Mode Control Switch* Faulty SCM Perform the following tests in order:1. Electrical ConnectorInspect connectors and associated wiring for damage, abrasion, corrosion or incorrect attachment. Refer to Section 5: Inspecting Electrical Connectors for details.2. Faulty Mode Control SwitchConnect a jumper wire between terminal-12 on the SCM and -Battery. Disconnect the jumper wire. If the LED resets (OFF) when the jumper wire is connected the problem is in the MCS or wiring to the MCS, repair as required.3. Faulty SCMIf the LED does not reset verify that the fault condition no longer exists. If the fault cannot be reset, replace the SCMEngine Shutdown with SCM LED Active
Probable Root Causes:* All Fault LED's are active on the SCM* Overcrank LED* Overspeed LED* Low Oil Pressure LED* High Oil Temperature LED* Emergency Stop LED* Auxiliary LED Before Proceeding with this test procedure verify that the set points are programmed correctly. Improperly programmed set points will cause the SCM fault Indicators to become active. Refer to Section 2: Programming Parameters. Perform the test for your symptom:1. All Fault LED's are active on the SCMDisconnect wires from terminal-8 on the SCM. Measure the voltage between +Battery and -Battery. The voltage should be between 18 and 32 VDC. If the wiring to terminal -8 on the SCM is grounded, correct the problem. If the voltage is 15 VDC or less, battery voltage is low. Charge battery or correct wiring problem as required. If battery voltage is above 15 VDC replace the SCM.2. Overcrank LEDIf the Overcrank LED is ON, reset the SCM by turning the Mode Control switch to the OFF/RESET position. If the Overcrank LED is still on, refer to Section 3: SCM Will Not Reset.3. Overspeed LEDTurn the Mode Control Switch (MCS) to the OFF/RESETposition. Restart the engine and verify that this eliminates the problem. If the engine Overspeed LED comes ON again, place the MCS to the STARTposition and operate at rated speed. Monitor the gas shutoff valve and magneto ground signal. Press and hold the Verify Switch on the back of the SCM. Release the switch after the engine stops. Check that the gas shutoff valve and magneto ground signal caused the engine to shutdown. Also, check that the overspeed LED, on the SCM, is flashing. Turn the MCS to the OFF/RESETposition. If shutdown speed is 75 percent of overspeed set point, the overspeed function is OK. If the set points have been lost or incorrectly set refer to section 2: Programming Parameters.If the Overspeed fault