Hitachi ZAXIS 120-3 class Operator's Manual page 230

Interval (hours)
Daily Contact surfaces of
flange joints
Welded surfaces on
joints
Every 250 hours Joint neck
Welded surfaces
on joints
Clamps
NOTE: Refer to the illustrations in Fig.2 for each check point location or for a description of the
abnormality. Use genuine Hitachi parts
Interval (hours)
Every 250 hours Contact surfaces of
flange joints
Oil cooler
Coupling and
rubber hose
NOTE: Refer to the illustrations in Fig.3 for each check point location.
MAINTENANCE
Table 2. Lines
Check Points
Leak (11)
Leak (12)
Crack (13)
Crack (12)
Missing
Deformation
Loose
Table 3. Oil cooler
Check Points
Leak (14)
Leak (15)
Leak (16)
Abnormalities
Replace
O-ring
and/or
retighten bolts
Replace
Replace
Replace
Replace
Replace
Retighten
Abnormalities
Replace
O-ring
and/or
retighten bolts
Replace
Retighten or
replace
7-39
Remedies
13
13
Remedies
12
11
M137-07-001
12
M137-07-007
Fig. 2
15
14
16
M1U1-07-051
Fig. 3