Hitachi Zaxis 33U-5A Operator's Manual page 214

Interval (hours) Check Points
Every 250 Hose covers
hours
Hose ends
Hose covers
Hose covers
Hose
Hose ends and
Fittings
Lines
Interval (hours)
Daily Contact surfaces of flange joints Leak (11)
Bolts
Welded surfaces on flange joints Leak (12)
Every 250 Flange joint neck
hours
Welded surfaces on flange joints Crack (12)
Clamps
Oil Cooler
Interval (hours)
Every 250 Coupling
hours
Oil Cooler
Damage or leak (4)
Damage or leak (5)
Exposed reinforcement (6)
Crack or blister (7)
Bend (8), Collapse (9)
Deformation or corrosion (10)
Check Points
Check Points
Leak (14)
Leak (15)
MAINTENANCE
Abnormalities
Abnormalities
Loose or leak (11)
Crack (13)
Missing or deformation
Loose bolts
Abnormalities
Retighten or replace
Replace
7-46
Remedies
Replace
Replace
Replace
Replace
Replace
Replace
Remedies
Replace
Retighten or
replace O-ring
Replace
Replace
Replace
Replace or
retighten
15
Remedies
4
5
M115-07-146
7
6
M115-07-147
8
M115-07-148
9
10
M115-07-149
12
13
11
M137-07-001
12
13
M137-07-007
14
MADB-07-021