GR APP LE LOA DER
V a h v a J u s s i 3 2 0
2011 Kreisi Metall
21
Troubleshooting
TROUBLE
POSSIBLE CAUSE
REMEDY
PUMP RUNNING TOO SLOWLY
CHECK PUMP ROTATING SPEED
NOT ENOUGH OIL
ADD OIL (AIR-BLEEDING)
FAULTY PUMP
CHANGE OR GET THE PUMP FIXED
LEAKS OR OBSTRUCTIONS IN OIL
LINES
INSPECT AND CLEAN OIL LINES
LOADERS’ WORKING
MOVEMENTS SLOW
OIL TOO THICK
CHANGE TO A THINNER (PROPER)
OIL GRADE
OBSTRUCTIONS IN THE OIL LINES
CHECK THE LINES AND THE CHOKES
CLOGGED-UP (RETURN) FILTER
CLEAN OR RENEW FILTER
LOADERS’
DESCENDING
MOVEMENTS SLOW
OIL TOO THICK
CHANGE TO A THINNER (PROPER) OIL GRADE
ROTATION SPEED TOO HIGH OR
PUMP IS TOO POWERFUL
CHOOSE A CORRECT PUMP/ SPEED OF
ROTATION
LOADERS’ MOVEMENTS
TOO FAST
INCORRECT OPERATION
LEARN TO OPEN THE CONTROL VALVE TO A
SUITABLE DEGREE
NOT ENOUGH OIL
ADD OIL (AIR BLEEDING)
FAULTY PUMP
CHANGE OR GET THE PUMP FIXED
FAULTY OF RELIEF OR SHOCK
VALVES OR WRONG ADJUSTMENT
CHANGE THE RELIEF OR SHOCK VALVES OR
ADJUST IN RIGHT WAY
FAULTY CONTROL VALVE
CHANGE OR GET THE VALVE FIXED
LOADERS’ WORKING
MOVEMENTS
POWERLESS
FAULTY CYLINDERS OR SEALS
CHECK THE CYLINDERS AND CHANGE THE
SEALS
AIR IN HYDRAULIC SYSTEM
CHECK OIL LEVEL, BLEED AIR FROM SYSTEM
CHECK FOR OBSTRUCTIONS
OR LEAKS ON THE INLET SIDE
LOADERS’ MOVEMENTS
ARE JERKY
FAULTY PUMP
INSPECT THE PUMP AND GET IT FIXED
FAULTY CONTROL VALVE
INSPECT THE CONTROL VALVE AND GET IT
FIXED
BOOMS DESCEND BY
THEMSELVES
FAULTY CYLINDERS OR HOSES
FIX THE LEAKAGE POINT, CHECK CYLINDER
SEALS
FAULTY VALVE
FIX THE VALVE
FAULTY CILINDER OF THE GRAPPLE
FIX OR CHANGE THE CILINDER
GRAPPLE’S OPENING
BY ITSELF
FAULTY ROTATOR
FIX OR CHANGE THE ROTATOR