Hitachi NEXT Series Instruction Manual page 99

Replacement of Check Valve (2-Yearly)
10
Air-Cooled
Gasket (1)
Flow direction (arrow direction)
Water-Cooled
Flow direction (arrow direction)
9. MAINTENANCE [How to Service the Air Compressor]
1
Depressurize the compressed air in the air compressor
as described in 9.4
Gasket (2)
2
Check valve cover
(upper)
Remove the enclosure panels, such as front door (1) [Ref.
Gasket
No. 904], front panel [Ref. No. 906].
Check valve
Gasket
3
① Loosen and remove the bolts tightened to the check
Check valve cover
(lower)
② Remove the check valve cover, check valve, and
③ Be careful for installing direction of the check valve.
Check
valve cover
Gasket
4
Check valve
Sufficiently clean the check valve and check valve cover
Gasket
and so on. Make sure that no rust particles and/or
fragmented gaskets are left on the valve and/or gasket
contacting surfaces.
Aftercooler
header
Depressurizing the System
.
Removing the Enclosure Panels
Disassembly
valve cover (upper) for air-cooled.
(Check valve cover for water-cooled)
gasket.
Cleaning and Inspection
97