OKADA TOP Series, Инструкция и перечень запасных частей для владельцев и операторов

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29
Troubleshooting
1. Major causes and suggested remedies for poor starting
MAJOR CAUSES SUGGESTED REMEDIES
B
reak
er
Increase in sliding resistance of piston owing to
U-packing damage.
Replace the U-packings.
Increase in sliding resistance of piston owing to natural
hardening of U-packings occurring in low Winter
temperature.
Push the chisel and stroke the piston.
Damage of valve, valve box and valve box sleeve.
Repair the shallow flaws with an oil stone and
abrasive paper. Replace it if the flaws are deep.
Damage in the sliding areas between the cylinder and
piston.
Repair the flaws with an oil stone and abrasive paper.
E
xca
va
to
r
Neglect in opening the stop valve or keeping the stop
valve closed.
Fully open (turn on) stop valve or repair valve.
Insufficient hydraulic pressure or discharge owing to
damage to the secondary relief valve.
Repair or replace parts.
Improper selection and damage of the directional valve. Repair or replace.
Clogging by foreign matter in the piping.
Disassemble and remove foreign matter.
●
Remove scratches on the surface of valve using sand paper. Do not use an oil stone.
2. Main causes and suggested remedies for occasional stopping during operation
MAJOR CAUSES SUGGESTED REMEDIES
B
reak
er
Damage of cylinder, piston, cylinder sleeve, valve, valve
box and valve box sleeve.
Repair flaws with an oil stone and abrasive paper.
(Unless damage is mended quickly, the parts become
irreparable.)
E
xca
va
to
r
Use of excavator when oil temperature is above 80
°
C
(176
°
F).
Avoid using the excavator above 80
°
C. Do not rev
up the engine more than required.
Clogging by foreign matter in the piping Disassemble and remove the foreign matter.
3. Major causes and suggested remedies for irregularity in operation
MAJOR CAUSES SUGGESTED REMEDIES
B
reak
er
Improper pressure of the gas sealed in the gas cushion
chamber. Regulate the nitrogen gas pressure to proper
pressure.
Wear of shank bushing beyond limit. Replace shank bushing.
Damage of cylinder, piston, cylinder sleeve, valve, valve
box and valve box sleeve.
Remove flaws with an oil stone and abrasive paper.
Insufficient gas pressure of accumulator or damaged
bladder.
Recharge nitrogen gas or replace the bladder.
E
xca
va
to
r
Lack of hydraulic oil. Replenish with the same oil.
Deterioration or contamination of the hydraulic oil. Replace all oil with fresh oil.
Defective operation or improper set pressure of the
main relief valve and secondary relief valve.
Send the main relief valve to the manufacturer’s designated
service factory for adjustment.
Regulate the secondary relief valve to correct the set
pressure.
Or repair or replace the damaged spring, seat, valve or
piston.
Insufficient discharge and pressure owing to a hydraulic
pump malfunctioning. Send the excavator pump to the manufacturer’s
designated service factory for repair.
Use of the excavator while oil temperature has risen
abnormally above 80
°
C (176
°
F).
Avoid using the excavator above 80
°
C (176
°
F).