R90 - 160N / R90 - 160I / R90 - 160NE / R90 - 160IE
http://www.ingersollrandproducts.com
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10.0 MAINTENANCE
Scavenge screen clean/check procedure
The screen/orifice assemblies are similar in appearance to
a straight tubing connector and will be located between
two pieces of 1/4 inch O.D. scavenge line tubing.
The main body is made from 17mm hexagon shaped
brass and the diameter of the orifice and a direction-of-
flow arrow is stamped in flat areas of the hexagon.
A removable screen and orifice (see figure) will require
clearing as outlined in the Maintenance Schedule
Section 10.2.
To remove the screen/orifice, disconnect the scavenge
line tubing from each end. Hold the center section firmly
and use a pair of pliers to gently grasp the exit end of
the assembly that seals against the scavenge line tubing.
Pull the end out of the center section while using care to
prevent damage to the screen or sealing surfaces.
Clean and inspect all parts prior to reinstallation.
When the assembly is installed, confirm the direction of
flow to be correct. Observe the small arrow stamped in
the center section and ensure the direction flow to be
from the separator tank to the airend.
Coolant hoses
The flexible hoses that carry coolant through the
cooling system may become brittle with age and
will require replacement. Replace them as needed or
every 4 years.
Depending on the location of the hose, it may
contain compressor coolant. It is recommended to
drain the coolant into a clean container. Cover the
container to prevent contamination. If the coolant
is contaminated, a new charge of coolant must be
used.
Remove the hose.
Install the new hose and refill the unit with coolant.
Start the compressor, check for leaks and check
coolant level. Refill as necessary
Pressure relief valve check
The pressure relief valve must be frequently tested and
regularly maintained. Remove from the machine for
testing. If operating conditions are particularly severe, the
frequency of testing and maintenance must be increased
accordingly. A pressure relief valve check must also be
performed at the end of any non-service period. The
user must establish the frequency of such tests as it is
influenced by such factors as the severity of the operating
environment.
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The pressure relief valve should be tested and re-
calibrated in accordance with any national or local
codes that may exist. If no code exists,
Ingersoll Rand
recommend that the pressure relief valve is recalibrated at
intervals of one year by a licensed contractor or qualified
service personal.
Air filter change procedure
Unclip the retaining cap and withdraw the old
element.
Fit the new element and refit the retaining cap.
Blower Motor Re-Grease
The blower motor contains pre-greased, sealed bearings.
They cannot be re-greased and do not need it over its
normal life time.
Air-cooled Cooler Cleaning
Air compressor operating temperatures will be higher
than normal if the external passages between the fins of
the cooler cores become restricted with foreign material.
Regular cleaning of the cooler surfaces will support the
reliable operation of your air compressor system and
improve the life of your compressor oil. When performed
frequently as determined by your site conditions and
airborne contamination, more significant cleaning or heat
exchanger replacement may not be necessary.
Ensure that the compressor is isolated from the
compressed air system and is vented of all pressure.
Ensure that the main power disconnect switch is
locked off and tagged.
For any required lifting of air compressor parts or
required tools, always use the proper certified lifting
equipment, and employ sound working principles.
Visually check the outside of the cooler cores to
determine the appropriate cleaning method detailed
as follows.
4.1. Light cleaning – For loose dirt, dust and other
light foreign material, open the access panels on
the sides of the cooler plenum and gently blow
compressed air across the oil cooler surface. Use a
vacuum hose with a soft brush to clean the exposed
face of the air after cooler. Repeat the process until
the coolers are sufficiently clean. Replace the access
panels before returning the machine to service.
4.2. Heavy cleaning – For thick, packed dirt, oil or
grease, or other heavy material, the coolers will
need to be removed from the machine for pressure
washing.
Ingersoll Rand
does NOT support
pressure washing coolers when they are installed in
machinery due to the dangers of spraying water in or
around potential electrical power sources. Follow the
steps below for cooler removal.
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