ARM GP-MATERIAL HANDLING 1360499 - Caterpillar

psi)    
165 kPa (24 psi)    
High     Detection of oil mist     -     Presence of oil mist in the crankcase    
N/A     Metal particle detection     -     Presence of metal particles in the oil lines    
Miscellaneous    
High     Overspeed     -     -     113 % of rated rpm    
Low     Starting motor air supply pressure     Vane    
750 kPa (109 psi)     -    
Low     Turbine
515 kPa (75 psi)     -    
( 1 ) An optional setpoint is 0.07 kPa times the engine rpm.
( 2 ) The minimum difference between the two temperatures must be greater than 2 °C (4 °F). For example, a jacket water inlet temperature of 90 °C minus a lube oil inlet temperature of 85 °C is an acceptable difference of 5 °C.
( 3 ) An alarm for the temperature of the exhaust port is specific to the particular project. The primary alarm for exhaust temperature is the exhaust inlet to the turbocharger.
( 4 ) An optional setpoint is 0.4 kPa times the engine rpm.
( 5 ) The setpoint is determined by adding 30 kPa to the maximum test specification from the dynamometer.
( 6 ) An optional setpoint is 0.5 kPa times the engine rpm.Shutdown Procedure For the Oil Mist Detector
If a shutdown occurs due to excessive oil mist, use the following procedure.Note: Instructions from the Service Manual, "Disassembly and Assembly" module will be necessary in order to perform this procedure.
After the shutdown, inspect the control system for other alarm conditions. Compare the timing of the shutdown to the activation of the alarm. Ensure that the shutdown was initiated by the oil mist detector.
Inform the master engineer that the engine is unavailable.
Inspect the display of the oil mist detector in order to ensure that the shutdown is genuine. The green "Ready" indicator is OFF and the red "Alarm" indicator is FLASHING. Inspect the display for other faults.
After verifying the cause of the shutdown, shut off the air supply to the starting motor. This will prevent accidental starting.
Open the cylinder pressure valves (Kiene valves) for all of the cylinders.
Guards must be in place prior to operating barring device motor.Remove all hand tools prior to operating barring device motor.
Do not use an impact wrench to operate the barring device. The use of an impact wrench will cause gear tooth failure.
Operate the prelube pump and the barring device. If the flywheel will rotate freely, rotate the engine for two complete revolutions (720 degrees). Lock the barring device.
Deactivate the prelube pump.
Flash fire may result in personal injury, if crankcase covers are removed within fifteen minutes after emergency shut down. Do not restart engine until cause for shutdown has been corrected.
After the engine has been shut down for 15 minutes, remove all of the crankcase covers. The oil mist detector monitors each section of the crankcase. First investigate the section with the fault condition.Note: It is important to measure the temperatures quickly, before the bearings can cool.