SECTION 6: MAINTENANCE
CAS40P 40 CFM / 100 PSIG
PAGE - 52
®
An Oshkosh Corporation Company
Removing and Replacing a Side Panel
to remove
the side panels.
A gasket replacement kit (#73744208) is offered for
maintenance on the compressor gasket set groups.
Gasket replacement set locations consists of the fol-
lowing:
• Cylinder head/manifold (x 2; left and right sides).
• Cylinder head base (x 2; left and right sides).
• Crankcase side plates (x 2; left and right sides).
• Crankcase end cover (see note below)
.
• Low pressure inlet valves (x 4; two per each
head).
• Low pressure discharge valves (x 4; two per each
head).
• High pressure inlet valves (x 4; two per each
head).
• High pressure discharge valves (x 4; two per
each head).
In order to replace gasket sets follow the steps,
where applicable from
Section 6.4.13, Disassem-
bling the Compressor
,
to access the gaskets that
need to be replaced. For a full exploded-view assem-
bly diagram of the gasket replacement kit parts’ loca-
tions, refer to
Section 8.13, Compressor Gasket
Replacement Kit #73744208 - Piece Parts
. In addi-
tion, refer to
Section
6.4.7, Centrifugal Unloader
Installation
for assistance with the centrifugal
unloader assembly.
6.4.12 PRESSURE SWITCH MAINTENANCE
Refer to
Figure 6-17
. The pressure switch is pre-
adjusted at the factory. Its cover is sealed with a tam-
per-proof coating.
Do not
remove this protective
sealing.
The pressure switch should never be used to manu-
ally-adjust the pressure settings, as injury or damage
to the machine may result. If a problem concerning
pressure levels exists, consult the troubleshooting
section of this manual. Should the problem persist,
contact the IMT service department for assistance.
6.4.13 DISASSEMBLING THE COMPRESSOR
To maximize the accessible work space needed for
compressor unit maintenance, both side panels
(drive assembly access panel and instrumentation
panel) must be removed. Consult
Section 6.4.1.2,
WARNING
Before performing maintenance:
Shut down machine, relieve all system
pressure and lock out all power, as per
the Safety Section of this manual. If
machine is hot, allow package to cool
before removing any panel.
NOTE THAT THE SYSTEM CAN BE
STARTED REMOTELY:
Always clearly tag the start-up
instrumentation against accidental
system start-ups during maintenance.
KEY
DESCRIPTION
A
PRESSURE SWITCH
B
PRESSURE GAUGE (reference)
C
HOUR METER (reference)
Figure 6-17: Pressure Switch Location
A
C
B
NOTE
End cover gaskets or shims are
furnished in three thicknesses, and the
proper combination must be selected so
that crankshaft can be "spun" in the
bearings without "end play".
Manual #99905382 Rev 02
(JUNE 2018)
