Hitachi ZW 310-6 Operator's Manual page 378

Interval
Check Points
(hours)
Contact surfaces of
flange joints
Every 10 Bolts
hours (daily)
Welded surfaces on
flange joints
Flange joint neck
Welded surfaces on
Every 250
flange joints
hours
Clamps
MAINTENANCE
Abnormalities
Leak (11)
Loose or leak (11)
Leak (12)
Crack (13)
Crack (12)
Missing or deformation
Loose bolts
7-64
Remedies
Replace
Retighten or replace
O-ring
Replace
Replace
Replace
Replace or retighten
13 12
11
M4GB-07-059
12
13
M4GB-07-060
Fig.2