Maintenance, inspection and repair
3 – 4
Inspection item Location Correction
• Abnormal abrasion and
cracks in rod
• Rod • If the rod is burred,
deformed, or its end is
broken, correct with a
grinder
• If the rod is extremely worn,
replace it
• If the rod is cracked,
replace it with a new one
• Greasing
¡ ×
• When using a grease gun,
grease 5-10 times before
start and every 2-3 hours
thereafter
• Supply grease through the
grease filler port in the front
head
• Apply grease to the bracket
mounting pin
• Grease them while the
rod is on the ground and
it is pushed against the
piston
* To prevent entry of
grease into piston
striking chamber side,
push the rod against the
piston while greasing.
• Level of hydraulic oil
• Contamination
• Hydraulic oil tank • Check the oil level of the
hydraulic oil tank mounted
on the base machine every
time work is performed.
After starting the machine
(after operating the boom
and arm), check again
• Judge it by the color of the
hydraulic oil. Follow the
criteria for judging
contamination set by
service engineer according
to the site. If contamination
is excessive, drain and
flush the hydraulic oil tank
and then fill with new oil
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