Hitachi ZW 550-6 Operator's Manual page 339

Interval (hours) Check Points
Daily Contact surfaces of
flange joints
Welded surfaces on
joints
Every 250 hours Joint neck
Welded surfaces on
joints
Clamps
f
NOTE: Refer to the illustrations in Fig. 2 for each check point location or for a description of
the abnormality. Use genuine Hitachi parts.
MAINTENANCE
Table 2. Lines
Abnormalities
Leak (11)
Leak (12)
Crack (13)
Crack (12)
Missing
Deformation
Loose
7-55
Remedies
Replace
O-ring and/or
retighten bolts
Replace
Replace
Replace
Replace
Replace
Retighten
13 12
11
M4GB-07-059
12
13
M4GB-07-060
Fig. 2