Screen Image

21= FRONT CRANE

23 = REAR CRANE

Explanation

Front or rear ECU is receiving a pressure sensor signal outside 4-20mA range

The pressure sensor (shown below) measures the hydraulic pressure in the piston side of the top arm cylinder and is located on the top arm lifting cylinder.

Causes

• Damaged sensor cable or connector plug
• Moisture in sensor connecting plug
• Use override code to continue operation
• Faulty sensor

Operator Actions

• Check connector plug firmly seated and not damaged
• Request service

Service Tasks

• Check sensor cable and connector plug.
• Go to VIEW SENSOR VALUES, VIEW FRONT or REAR ANGLE SENSORS and check that when the top arm is fully extended that the pressure reading increases as expected
• Replace sensor if pressure does not change or is incorrect when cross checked with the analogue pressure gauge mounted on the rear crane