Hitachi NEXT Series User Manual

107
9. MAINTENANCE [How to Service the Air Compressor]
Stem
Baffle
Cover
Screw (4 pcs)
Diaphragm
Valve
Regulator
O-ring
Filter element
IN
OUT
Nut A
3/8
φ12
(B)
Rubber packing
Rubber packing
O-ring
Remover
element
Cover
(A)
Fig. B
Nut
Plate
Spring
Valve seat
Locked joint
Pull
Fig. A
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 Loosen nut (B) and remove the cover. Now you can
remove the remover element.
③ Install a new element. Carefully seat the upper and
lower rubber gaskets on the element without allowing
any gaps.
④ After replacement
of element, grease
the O-ring, replace
the housing, and
tighten set screws
(A) diagonally and
evenly.
2. Maintenance of Filter Regulator
① Turn the cover to remove. Remove the baffle and
replace the filter element with a new one.
② Remove 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.
3. Maintenance of OMR Relief Valve (See Fig. A.)
① Turn the nut at the top of the OMR relief valve and
remove the plate. Replace the sheet and the spring
with new components.
② Ensure that the spring is positioned at the center
before assembly.
4. Maintenance of Vacuum Indicator (See Fig. B.)
① Contamination 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.
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.
20
Oil Mist Remover

Hitachi NEXT Series Specifications

General

Brand	Hitachi
Model	NEXT Series
Category	Air Compressor
Language	English