65
Chain deformation and
damage.
○
○
○
○
If chain bearing loosen.
○
○
○
○
Attachm
ent
Check if conditon is
normal
○
○
○
○
Lifting
cylinder
Check if piston rod,
piston rod thread and
connection
deform,
loosen or damage.
Test
hammer
○
○
○
○
○
Operation condition
○
○
○
○
○
Leakage condition
○
○
○
○
○
Pin
and
cylinder
steel-backed
bearing
wear
or
damage
condition.
○
○
○
○
Hydraulic
pump
If hydraulic pump leaks
or has noise.
○
○
○
○
○
Hydraulic pump drive
gear wear condition
○
○
○
○
Fork
Fork
damage,
deformation and wear
condition.
○
○
○
○
○
Positioning pin wear
and damage condition.
○
○
○
Fork root hook welded
part
crack
or
wear
condition.
○
○
○
○
Mast,
fork
carriage
If
the
welded
part
between Inner and outer
mast and beam has
crack or damage.
○
○
○
○
If
the
welded
part
between mast and tilting
cylinder
has
bad
welding,
crack
or
damage.
○
○
○
○
If inner or outer masts
have bad welding, crack
or damage.
○
○
○
○
If fork carriage bad
welding,
crack
or
damage.
○
○
○
○
If roller loosens.
○
○
○
○
Mast supporting bear
wear or damage.
○
If mast supporting bolts
loosen.
Test
hammer
○
（
first
time
）
○
○
○
If lifting cylinder bottom
bolt, piston head bolt,
U-type bolt and walking
beam guide bolt loosen.
Test
hammer
○
（
first
time
）
○
○
○
