Lovol FR18E-u - Central Rotating Coupler; Control Valve

Troubleshooting
Troubleshooting 6-
3
Control Valve
Trouble Cause Measures
Under power
Crack on valve core Replace valve body
Crack on overflow valve
Disassemble, clean or replace
valve
Valve core chocked
Overheat of hydraulic oil due to
foreign matter
Remove foreign matter
Contaminated hydraulic oil Replace oil, clean lines
Deformed valve body due to over
tension of h ydraulic parts
Replace valve body
Leak at sealing ring
Foreign matter on valve core Clean or rep lace valve
Overpressure
Check、adjust with pressu re gauge
Damaged return spring Replace return spring
Change of temperature Preheat system
Foreign matter in seal Clean sealing ri ng
High resistance in oil return lines Use larger pipes
Foreign matter in sealing ring Clean valve
Damaged valve core Replace valve body
Damaged sealing ring Replace sealing ring
Valve core can not move
Foreign matter in valve Clean valve
Contaminated valve cap Replace seal for valve cap
Crack on valve core Replace valve body
Central Rotating Coupler
Trouble Cause Measures
Low traction fo rce Bad sealing ring fo r central
coupler
Replace sealing ring
Damaged rotor in central coupler Replace sealing ring
Bad sealing Replace the sealing ring