Troubleshooting And Countermeasures; Hydraulic Dump Troubles And Countermeasures - Kubota KC70 Manuel De L'opérateur

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11.

TROUBLESHOOTING AND COUNTERMEASURES

11-1 HYDRAULIC DUMP TROUBLES AND COUNTERMEASURES
Oil is insufficient.
Air is intruded into suction pipe.
Oil viscosity is improper.
Safety valve is released.
Pump is excessively worn out.
Piston is defective.
C y l i n d e r p o w e r i s
insufficient.
Piston Packing is defective.
Oil is leaking from oil pressure hose.
Oil is leaking from cylinder packing area.
Control valve spool or valve is defective or worn out.
Pump fittings are loose.
Oil is leaking from piping.
Piston packing is worn out or broken.
Oil is leaking from valve spools area.
Deck body retaining
is insufficient.
Oil is leaking from poston.
Oil is leaking from oil pressure hose.
Power package is excessively worn.
Engine speed is insufficient.
Piston or packing is worn out.
It takes much time to
raise deck body.
Control valve spool is worn out.
Oil is leaking, out of cylinder or piping.
Safety valve is released.
Deck body movement
i s o p p o s i t e t o t h e Piping is wrong.
control lever operation.
Oil is insufficient.
Air is intruded into suction oil.
Pipes, hoses or joints are deformed.
A b n o r m a l n o i s e i s
created.
Oil viscosity is too high.
Pump gears or bearings are worn out.
Geared pump is in cavitation (due to cold weather).
Piston rod does not
Geared pump is defective.
move when control
Cylinder piston is defective.
level is operated.
Possible cause of trouble Countermeasure
Check and replenish.
Check and tighten up.
Replace it with specified oil.
Disassemble, check and clean.
Check, repair or replace.
Replace cylinder.
Replace as assembly.
Replace.
Check and replace as assembly.
Check and repair or replace.
Check and tighten.
Check and tighten or replace.
Replace as assembly.
Check and repair or replace.
Check and replace as assembly.
Replace.
Repair or replace.
Increase the speed.
Replace as assembly.
Replace.
Check and repair or replace.
Disassemble, check and clean.
Reverse the oil pressure hose position.
Supply oil up to the specified level.
Check for defects and repair.
Repair or replace.
Use the specified oil.
Disassemble, check, and replace.
Perform warm-up operation.
Disassemble, check and repair or replace.
Replace as assembly.