OPERATOR'S MANUAL MAINTENANCE

Section 3 - Maintenance
Routine Maintenance
Troubleshooting
3-107 3-107
9803/JSM-0412
Slew
Table 58. Insufficient slew force
Table 59. Idle slew during slew braking
Table 60. Idle slew during slew stopping
Table 61. Abnormal noise during slew
Hydraulic ram
Table 62. Insufficient force of hydraulic ram
Table 63. Oil leakage outside the hydraulic ram
Cause Remedy
Performance reduction of slew motor
Replace slew motor
(1)
Thermal seizure of slew shaft
Supply grease or replace the slew shaft
(1)
Cause Remedy
Low setting of brake valve
Adjust the pressure
(1)
Clogged valve
Wash the valve
(1)
Performance reduction of slew motor
Replace slew motor
(1)
Internal oil leakage of control valve
Repair or replace valve assembly
(1)
Cause Remedy
Low setting of brake valve or port relief
Adjust the pressure
(1)
Clogged valve
Wash the valve
(1)
Performance reduction of slew motor
Replace slew motor
(1)
Internal oil leakage of control valve
Repair or replace valve assembly
(1)
Cause Remedy
Air in slew motor Refill with oil
Insufficient greasing of slew bearing Add grease
Cause Remedy
Low pressure setting for the relief valve
Adjust the pressure
(1)
Oil leakage inside the hydraulic ram
Replace the ram seals
(1)
Damage of the hydraulic ram or rod
Replace the hydraulic ram or rod
(1)
Oil leakage inside the control valve
Repair or replace the valve assembly
(1)
Cause Remedy
Defective hydraulic ram seals
Replace hydraulic ram seals
(1)
Hydraulic cylinder rod damage*
Replace hydraulic ram rod
(1)
(1) Indicates jobs which should be done by a specialist.