Hitachi NEXT Series Instruction Manual page 109

Oil Mist Remover
20
1. Replacement of remover element
① Remove the pipe provided at the top of the remover if
required. Then remove 4 set screws (A) from the oil
mist remover housing.
Pull up the upper part of the housing.
② L oosen nut (B) and remove the cover. Now you can
remove the remover element.
③ I nstall a new element. Carefully seat the upper and
lower rubber gaskets on the element without allowing
any gaps.
④ A fter replacement
of element, grease
the O-ring, replace
the housing, and
tighten set screws
(A) diagonally and
evenly.
(A)
2. Maintenance of Filter Regulator
① T urn the cover to remove. Remove the baffle and
replace the filter element with a new one.
② R emove the upper 4 set screws and remove the upper
part of the regulator. Replace the diaphragm and the
valve stem with new components. Be careful not to
install the new diaphragm upside down.
Diaphragm
OUT
Valve
9. MAINTENANCE [How to Service the Air Compressor]
(B)
Cover
Rubber packing
Remover
element
O-ring
Rubber packing
Screw (4 pcs)
Stem
IN
Regulator
O-ring
Filter element
Cover
Baffle
3. Maintenance of OMR Relief Valve (See Fig. A.)
① T urn the nut at the top of the OMR relief valve and
remove the plate. Replace the sheet and the spring
with new components.
② E nsure that the spring is positioned at the center
before assembly.
4. Maintenance of Vacuum Indicator (See Fig. B.)
① C ontamination of the vacuum indicator may cause
malfunction of indicator.
Remove and clean the indicator at least every six
months. In addition, replace the indicator once a year.
② Pull down the indicator while pushing up the locked
pipe joint at the top.
Spring
Nut
Plate
Valve seat
Fig. A
5. Maintenance of Ejector
① If the ejector is dirty, performance may decrease.
Disassemble and clean at least once a year.
② The maintenance procedure is as follows:
(1) Disconnect the control air tube at its detachable
connection.
(2) Loosen nut A (the nut can be turned independently
from the ejector body) and disconnect the ejector
from the manifold.
(3) Remove the plastic case.
(4) Clean the ejector body with a neutral detergent
and dry it with an air nozzle. Assemble all of the
parts.
Nut A
Locked joint
Pull
Fig. B
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