HYDRAULIC SYSTEM
SERVICE MANUAL 600H
2-12
08-19-2022 Control # 092-13
No Flow from Pump (If
pump does not prime in
30 seconds STOP!)
Pump not installed correctly.
Check proper drive rotation. Make sure pump shaft
is turning (i.e. drive coupling is engaged). Check for
sources of suction leaks, inlet flange tight? Pinched
o-rings?
Pump not getting oil.
Can't Build Any Pressure
Flow has an unrestricted path.
Make sure reservoir is full of oil.
Is it an open circuit to the reservoir.
Internal leakage in cylinders, valves,
motors or pumps.
Repair component.
No response to control
Overload system inoperative.
Insure overload system is working properly and Anti-
Two-Block/Overload solenoid is powered.
Load too heavy.
Check Capacity Chart.
PTO not engaged.
Engage PTO.
Low hydraulic fluid supply.
Check and fill as required.
Suction line blocked.
Drain tank and hose and remove blockage.
Broken hydraulic pressure line.
Replace as required.
Defective hydraulic pump.
See Pump Service Manual.
Incorrect relief valve setting.
Adjust relief.
Relief valve sticking.
Clean relief.
Poor hydraulic system
performance
Pump not operating at proper speed.
Check PTO ratio, pump size and engine speed for
proper oil flow
Low hydraulic fluid supply.
Check and fill as required.
Relief valve sticking.
Remove and clean.
Relief setting too low.
Readjust to proper setting.
Worn pump, motor or cylinder.
Replace bad part.
Plugged filter.
Change filter.
Valve spools not fully open.
Adjust linkage so valve has full throw.
Boom holding valves out of adjustment.
Adjust or clean as required.
Oil temperature too high.
Reduce engine speed, slow cycle time to cool oil or
add oil cooler option.
Hydraulic oil too cold or dirty.
Warm oil or use less viscous oil.
Line restricted.
Check lines; clean and repair as necessary.
Internal control valve crack.
Replace valve.
Load too heavy.
Check Capacity Chart and reduce load.
HYDRAULIC SYSTEM TROUBLESHOOTING CHART
Condition
Possible Cause
Possible Solution
REFERENCE ONLY
Содержание 600H
Страница 1: ...Service Manual National Crane 600H R E F E R E N C E O N L Y...
Страница 6: ...THIS PAGE BLANK R E F E R E N C E O N L Y...
Страница 38: ...INTRODUCTION 600H SERVICE MANUAL 1 26 08 19 2022 Control 092 13 THIS PAGE BLANK R E F E R E N C E O N L Y...
Страница 54: ...HYDRAULIC SYSTEM SERVICE MANUAL 600H 2 16 08 19 2022 Control 092 13 THIS PAGE BLANK R E F E R E N C E O N L Y...
Страница 136: ...BOOM 600H SERVICE MANUAL 4 62 08 19 2022 Control 092 13 R E F E R E N C E O N L Y...
Страница 138: ...HOIST 600H SERVICE MANUAL 5 2 08 19 2022 Control 092 13 THIS PAGE BLANK R E F E R E N C E O N L Y...
Страница 168: ...OUTRIGGERS 600H SERVICE MANUAL 7 18 08 19 2022 Control 092 13 THIS PAGE BLANK R E F E R E N C E O N L Y...
Страница 182: ...LUBRICATION 600H SERVICE MANUAL 8 14 08 19 2022 Control 092 13 THIS PAGE BLANK R E F E R E N C E O N L Y...
Страница 226: ...CRANE INSTALLATION 600H SERVICE 9 44 08 19 2022 Control 092 13 THIS PAGE BLANK R E F E R E N C E O N L Y...
Страница 228: ...SCHEMATICS 600H SERVICE MANUAL 10 2 08 19 2022 Control 092 13 THIS PAGE BLANK R E F E R E N C E O N L Y...
Страница 231: ...R E F E R E N C E O N L Y...
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