RING 8J1580 - Caterpillar

STEP 1. Check For Actuator Travel Test Procedure:Crank the engine and check for Actuator Travel. Expected Results:Actuator movement to FUEL ON position. STEP 2. Check Electronic Locomotive Control Box Test Procedure:Observe the diagnostic lamps which are visible through the lens on the control box lid. Expected Results:SHUTDOWN lamp ON. WHEEL SLIP and GENERATOR LOAD lamps may be ON or OFF depending on locomotive design. All other lamps OFF.
Fig. 1 SHUTDOWN LAMP ON
Fig. 2 BOX FAULT LAMP ON
Fig. 3 TURN CAL ADJ OUT
Fig. 4 CAL ADJ CORRECT
Fig. 5 TURN CAL ADJ IN
Fig. 6 PERSONALITY MODULE FAULT STEP 3. Check Shutdown Lamp Test Procedure:Observe SHUTDOWN lamp while cranking engine. Expected Results:SHUTDOWN lamp goes OFF while cranking engine. STEP 4. Check Fuel Shut-off Systems Test Procedure:Visually check any fuel shut-off systems connected between the control box and the actuator. Refer to system wiring diagram. Expected Results:All fuel shut-off systems are closed and do not limit current flow to actuator. STEP 5. Check Rack Actuator Signals Test Procedures:Connect a digital multimeter (Caterpillar Service Tool 6V3030) to measure DC amps on the 2A scale. Use this between the engine harness and rack actuator connectors to measure the current to the rack actuator coil while cranking engine. Expected Results:Current to rack actuator is greater than 0.2A. STEP 6. Manual Linkage Check Test Procedure:With engine stopped, manually move actuator lever and linkage to full FUEL ON position against stop screw. Expected Results:Linkage should move through full travel until it is against stop screw without binding or excessive force. STEP 7. Check Actuator Oil Pressure Output Test Procedure:With engine stopped, remove the test pressure plug from actuator and install 6V2044 Test Pressure Gauge. Crank the engine and read pressure from test pressure gauge. For correct pressure range, see ELECTRIC GOVERNOR ACTUATOR SPECIFICATIONS in Service Procedure B. Expected Results:Specified oil pressure with constant output. STEP 8. Measure Cranking RPM Test Procedure:Crank the engine and measure the cranking rpm. Expected Results:More than 75 rpm measured. STEP 9. Check Actuator Oil Supply and Mechanical Drive Test Procedure:See Service Procedure B to check actuator functions that follow:A. Correct oil supply.B. Plugged drain.C. Oil too thin.D. Drive has rotation.E. Correct direction of rotation.F. Damage to Coupling or Splines.Engine compartment oil sump must be full, and suction line must be open and without air leaks (caused by faulty gaskets or loose fittings). Actuator oil drain must drain freely. Expected Results:To find problem with the actuator drive or oil circuit. STEP 10. Check Personality Module CAL Switch Test Procedure:Remove the fitting covering the CAL switch on the Personality Module. (Fig. 1) Use a small screwdriver to turn the switch clockwise (away from the CAL marking). Replace the fitting covering the CAL switch. Observe the diagnostic lamps in the Locomotive Control box. Expected Results:The CAL ADJ (TURN CAL ADJ OUT, CAL ADJ CORRECT and TURN CAL ADJ IN) lamp codes are all OFF.
Fig. 1 PERSONALITY MODULE STEP 11. Check Electronic Locomotive Control Box Test Procedure:Disconnect connector J1 (VE connector) from control box. Reconnect