Engine System, Diesel
89
Service Manual – SC8000
• Check for correct operation of the belt-driven engine cooling fan (slippage).
• Check to see that the engine thermostat opens.
• Check for correct water pump operation.
• Check the engine crankcase oil level.
• Check for air trapped in the cooling system. (Refer to the
Engine Coolant/Replacing Engine Coolant
section.)
Loss of Oil Pressure Protection
The engine will shut down if the oil pressure drops to 3-7 psi. Check for possible causes for low oil pressure
such as:
• Engine crankcase oil level is low.
• Incorrect oil viscosity.
• Fault in oil pressure switch S28.
•
Excessive engine wear or defective internal oil pump (relief valve).
Engine Will Not Crank - Start Inhibit Active
• Drive pedal sensor switch R1 not calibrated; follow programming instructions to calibrate foot pedal
sensor.
• Drive pedal activated out of neutral (out of the calibrated deadband range):
– Remove foot from drive pedal.
– Adjust or repair the Hydroback/cable and/or main piston (propulsion) pump linkage.
• The control panel displays the critical fault icon showing
code #38. See the
General Troubleshooting
section for an
explanation and correction.
Engine Stops Running - Run InhibitActive
• Loss of the engine run signal input to the main control board Pin # J1-1 (GRA). Note that a good diesel
(Kubota) engine run signal will test 12V when measured (referenced) to B- ground. The run signal is lost
when the voltage reads 0V.
• The control panel displays the critical fault icon showing
code #38. See the
General Troubleshooting
section for an
explanation and correction.
