Section 7
79
DE-18 USER MANUAL
MAINTENANCE
7.1 GENERAL
A good maintenance program is the key to long
compressor life. Below is a program that when
adhered to, should keep the compressor in top
operating condition. For engine maintenance
requirements, refer to the Engine Operator's Manual
for a detailed description of service instructions. See
Parts Replacement and Adjustment Procedures for a
detailed description of specific compressor system
components.
7.2 ENGINE COOLANT
REQUIREMENT FOR
RADIATORS
The coolant provided with Sullair portable air
compressors is ethylene glycol based, 50/50 mixture,
and should never be mixed with a different coolant
type, color or brand. If radiator coolant is to be
added, for any reason, be sure that the coolant
added is the same as what is in the cooling system,
as well as what is recommended. Refer to the
Maintenance Section of the Engine Operator’s
Manual for proper engine coolant specifications and
instructions. Ensure that the proper coolant is used
when adding engine coolant to the machine. If you
are not sure of the coolant that is installed originally
or want to change to a different type, the cooling
system must be cleaned with a commercial cleaning
agent and completely flushed and filled with distilled
water several times to remove all traces of old
coolant. Then, fill the system with the recommended
coolant using only one brand/type. Cross
contamination which is caused by adding different
types of engine coolants may result in the coolant
additives to deplete (dropout); thus leaving radiator
surfaces unprotected. Corrosion to radiator surfaces
may occur, thus reducing radiator life expectancy. It
is extremely important to evacuate/purge all air within
the cooling system before replacing the radiator cap.
7.3 DAILY OPERATION
Prior to starting the compressor, it is necessary to
check the fluid level in the sump. Should the level be
low, simply add the necessary amount. If the addition
of fluid becomes to frequent, a problem has
developed which is causing this excessive loss. See
Section 9: Troubleshooting under Excessive Fluid
Consumption for a probable cause and remedy. Also
check the engine oil level and the radiator coolant
level prior to starting.
After a routine start has been made, observe the
controller display and local gauges and be sure they
monitor the correct readings for their particular phase
of operation - previous records are very helpful in
determining the normalcy of the measurements. After
the compressor has warmed up, it is recommended
that a general check on the overall compressor and
control panel be made to assure that the compressor
is running properly. Also check the air filter restriction
gauges. Should they indicate restriction, replace the
elements immediately (see AIR FILTER
MAINTENANCE on page 82).
7.4 INITIAL MAINTENANCE
AFTER 50 HOURS OF
OPERATION
Upon completion of the first 50 hours of operation, a
few maintenance requirements are needed to rid the
system of any foreign materials which may have
accumulated during assembly:
1. Change the compressor oil filter element.
2. Clean the control line filter element.
3. Check/replace the sump breather element.
WARNING
DO NOT remove caps, plugs and/or other
components when the compressor is run-
ning or pressurized/shutdown the compres-
sor before removing any components.
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