TROUBLESHOOTING
11-7
Swing Function
Problem
Cause
Solution
Upperstructure does not swing.
Faulty swing parking brake
* Repair or replace
Broken swing motor
* Repair or replace
Faulty pilot valve
* Replace
Faulty pilot circuit line
* Repair or replace
Low set pressure of swing relief valve
* Adjust and replace
Swing is not smooth.
Worn swing gear
* Repair or replace
Damaged swing bearing and bearing balls
* Repair or replace
Lack of grease
Refill
Low set pressure of swing relief valve
* Adjust and replace
* Mark: Consult your authorized Hitachi dealer.
Immediately after the control valve, swing motor relief valve and/or the swing motor is replaced, a noise may be
emitted and/or operation may not be performed smoothly due to air trapped in the hydraulic line.
Slowly continue to operate the machine for approx. 10 minutes to bleed air.
After repair work is complete, be sure to check the oil level in the hydraulic oil tank. Refill hydraulic oil as needed.
Others
The machine may have a noise, excessive vibration, and abnormal smell when any trouble occurs.
Always beware of the machine conditions during operation.
Summary of Contents for Zaxis 17U-5A
Page 4: ......
Page 8: ...CONTENTS MEMO ...
Page 12: ...MACHINE NUMBERS 4 MEMO ...
Page 84: ...OPERATOR S STATION 1 18 MEMO ...
Page 86: ...BREAK IN 2 2 MEMO ...
Page 108: ...DRIVING THE MACHINE 4 14 MEMO ...
Page 228: ...MAINTENANCE 7 88 MEMO ...
Page 230: ...MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS 9 2 MEMO ...
Page 232: ...STORAGE 10 2 MEMO ...
Page 240: ...TROUBLESHOOTING 11 8 MEMO ...
Page 250: ...SPECIFICATIONS 12 10 MEMO ...
Page 270: ...13 20 NUMERIC KEYPAD LOCK OPTIONAL ATTACHMENT MEMO ...
Page 274: ...INDEX 14 4 MEMO ...
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