jcb JS300, Service Manual

Page: 25 / 51

01 - Machine
06 - About this Manual
06 - Using the Manual
01 - 19 9813/7500-2 01 - 19
Cause Remedy
Pressure switch fault Refer to (PIL 33-90-00)
Refer to Check (Pressure) (PIL 30-50-03) Two stage MRV (Main Relief Valve) system fault
(boost function)
Refer to (PIL 33-27-37)
Cylinder ram fault Refer to Fault Finding (PIL 30-15-00)
(1) Check the applicable hydraulic service cycle times. Refer to Check (Operation) (PIL 30-00-15)
Table 7. Slew service does not operate as expected (including the slew brake)
(1)
Cause Remedy
Servo pressure not correct Refer to Check (Pressure) (PIL 30-00-15)
Refer to Controls, Excavator Arm (PIL 09-27-09) Excavator joystick controller fault
Refer to Fault Finding (PIL 30-60-15)
Excavator control valve fault Refer to Fault Finding (PIL 30-50-00) (2)
Pressure switch fault Refer to (PIL 33-90-00)
Slew lock system fault Refer to (PIL 33-33-88)
Slew motor fault Refer to Fault Finding (PIL 30-39-00)
Slew gearbox excessively worn or defective Refer to (PIL 30-08-06)
Slew ring bearing excessively worn Refer to Check (Condition) (PIL 06-24-03)
(1) Check the slew service cycle times. Refer to Check (Operation) (PIL 30-00-15)
(2) Check the applicable service spools.
Table 8. Travel service does not operate as expected
(1)(2)
Cause Remedy
Servo pressure not correct Refer to Check (Pressure) (PIL 30-00-15)
Excavator control valve fault Refer to Fault Finding (PIL 30-50-00) (3)
Travel system fault Refer to Fault Finding (PIL 27-00-06)
Refer to (PIL 09-27-30) Track control valve fault
Refer to (PIL 30-60-46)
Track motor fault Refer to Fault Finding (PIL 27-38-00)
Track components excessively worn or defective Refer to (PIL 27-36-00)
(1) Check the travel speed times. Refer to Check (Operation) (PIL 30-00-15)
(2) Check the linear travel deviation is acceptable. Refer to Check (Operation) (PIL 30-00-15)
(3) Check the applicable service spools.
Table 9. HVAC (Heating Ventilation Air Conditioning) system does not operate as expected
Cause Remedy
Control, HVAC unit, cooling, or refrigerant circuit fault Refer to Fault Finding (PIL 12-00-00)
Table 10. Fault codes displayed on the instrumentation
Cause Remedy
Machine or engine ECU (Electronic Control Unit) has
detected a device fault
Look up the fault code description. Refer to (PIL
33-57-90)