Eaton S090ST User manual

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ROTARY TOW BEHIND
REV010322
S090ST
S090TR
S115ST
S115TR
S185ST
S185TR

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ROTARY TOW BEHIND REV010322
Contents
Safety Information
2-5
Breathable Air
3
Pressurized Components
3
Personal Protective Equipment
3
Road Safety
4
NHTSA Statement
5
Nomenclature
6-8
Installation
9-15
Area
9
Exhaust
10
Lifting and Movement
10
General Lifting
11
Anchoring
11
Truck Installation
11
Prior to Towing
12
Electrical
12
Battery Component
13
Piping
13-14
Refueling
15
Storage
15
Tire Safety Guide
16-20
Wheel Bearing Maintenance Guide
21-24
Technical Data (Fill in Sheet)
25
Operation
15-16
Pre-Use Inspection
26
Start Up
26
Shut Down
26
Parking Compressor (Chock use)
26-27
Maintenance
27-28
Break In
27
Maintenance Schedule
28
Oil Change/Selection
28
Component Systems
29-32
Cooing System
29
Air Filter
30
Compressor Oil Filter
30
Oil Separator
31
Compressor Belts
32
Digital Controller
33-34
S185 Quick Start
35
Unit Regeneration
36
Attaching Towable Unit/Trailer
37-40
Parts Explosion Detail S090/S115
41-48
Parts Explosion Detail S185
49-56
Troubleshooting
56-57
Warranty Information
58-62
Maintenance Log
63

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SAFTEY INFORMATION
This manual contains very important information. This manual provides for information to promote SAFTEY and to PREVENT
EQUIPMENT PROBLEMS. To help understand this information, observe the following:
DANGER: “Danger”indicates and imminently hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING: “Warning”indicates a potentially hazardous situation which if not avoided, could result in death or serious
injury.
CAUTION: “Caution”indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury.
NOTICE: “Notice”indicates important information, that if not followed, may cause damage to equipment.
CALIFORNIA PROPOSITION 65
WARNING: This product or its power cord may contain chemicals known to the state of California to cause cancer and
birth defects or other reproductive harm. Wash hands after handling.
1. Allow only trained, authorized persons who have read and understood these operating instructions to use this
equipment. Failure to follow the instructions, procedures and safety precautions in this manual can result in accidents
and injuries.
2. NEVER start or operate the compressor under unsafe conditions. Tag the compressor, disconnect, and
lock out all power to it to prevent accidental start-up until the condition is corrected.
3. Install, use, and operate the compressor only in full compliance with all pertinent OSHA regulations and
all applicable Federal, State & Local codes, standards, and regulations.
4. NEVER modify the compressor or controls in any way.
5. Keep a first aid kit in a convenient place. Seek medical assistance promptly in case of injury. Avoid infection
by treating any small cuts and burns promptly.
DANGER: Failure to follow instructions and safety guidelines in this manual can result
in serious injury or death. Ensure that all users of this product read and understand
this manual. Store the manual near the compressor for ease of reference. If the
manual becomes damaged or illegible contact the manufacturer for a replacement.

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BREATHABLE AIR
1. NEVER use air from this compressor for breathable air except in full compliance with OSHA Standards 29 CFR
1910 and any other Federal, State or Local codes or regulations.
2. DO NOT use airline anti-icer systems in air lines supplying respirators or other equipment used to produce
breathable air. DO NOT discharge air from these systems in unventilated or other confined areas.
Pressurized Components
This equipment is supplied with an ASME designed and rated pressure vessel
protected by an ASME rated relief valve. Pull the ring before each use to
ensure the valve is functional. DO NOT attempt to open the valve while the
machine is under pressure. See figure on the right.
Personal Protective Equipment
Be sure all Be sure all operators and others around the compressor and its controls comply with all applicable OSHA,
Federal, State and Local regulations, codes, and standards relating to personal protective equipment. Including respiratory
protective equipment, protection for the extremities, protective clothing, protective shields and barriers, electrical
protective equipment, and personal hearing protective equipment.
The engine can produce high noise levels. Prolonged exposure to noise levels above 85 dBA is hazardous to hearing. Always
wear ear protection when operating or working around the unit.
CAUTION: DO NOT PULL WITH
PRESSURE IN SYSTEM
Read all manuals and information supplied for this unit carefully. Be thoroughly
familiar with all inspection and operation guidelines. Only persons that have
read and understand this manual should operate the compressor.
DANGER: Death or serious injury can result from inhaling compressed air
without using proper safety equipment. See OSHA standards on safety.

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Road Safety
We provide you with all the documents necessary to obtain the registration certificate.
NON-BRAKED COMPRESSORS must be towed by a vehicle having a net weight at least two times greater than the total
weight of the towed compressor.
This weight is the total authorized loaded weight (fill in for future reference) = lbs.
Towable weight is generally specified in the registration certificate of a van or a truck. If in doubt, you should contact the
manufacturer of the towing vehicle.
YOU MUST REQUEST A VEHICLE REGISTRATION CERTIFICATE FROM A LOCAL AUTHORITY.

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NHTSA Notification Statement
If you believe that your vehicle has a defect that could cause a crash or could cause injury or death, you should
immediately inform the National Highway Traffic Safety Administration (NHTSA) and the manufacturer.
If NHTSA receives similar complaints, it may open an investigation, and if it finds that a safety defect exists in a
group of vehicles, it may order a recall and remedy campaign. However, NHTSA cannot become involved in
individual problems between you, your dealer, or the manufacturer.
To contact NHTSA, you may either call the Vehicle Safety Hotline toll-free at 1-888-327-4236 (TTY:1-
800-424-9153), go to http://www.safercar.gov; or write to:
Administrator
NHTSA
1200 New Jersey Avenue SEWashington,
DC 20590
You can also obtain other information about motor vehicle safety from http://www.safercar.gov

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Nomenclature S090, S115(ST/TR)
1. ENGINE
2. COMPRESSOR OIL FILTER
3. AIR FILTER / ENGINE
4. COOLING LIQUID / ENGINE
5. INLET VALVE
6. SEPARATOR
7. AIR END
8. COMPRESSOR OIL FILL
9. ENGINE OIL FILL
10. MOTOR SPEED CONTROL CYLINDER
11. ENGINE OIL DIPSTICK
12. OIL FILTER
13. FUEL FILTER
14. STOP SOLENOID
15. SAFTEY VALVE
16. FAN

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Nomenclature S185(ST/TR)
1. ENGINE
2. COMPRESSOR OIL FILTER
3. AIR FILTER / ENGINE
4. COOLING LIQUID / ENGINE
5. INLET VALVE
6. SEPARATOR
7. AIR END
8. COMPRESSOR OIL FILL
9. ENGINE OIL FILL
10. MOTOR SPEED CONTROL
11. ENGINE OIL DIPSTICK
12. OIL FILTER
13. FUEL FILTER
14. EXHAUST DOWN PIPE
15. SAFETY VALVE
16. FAN
17. CONTROLLER
18. PARTICLE FILTER

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Nomenclature S090, S115, S185 (ST/TR)
1. TIRES
2. AXLE
3. TRAILER STAND LEG
4. HITCH MOUNT
5. ADJUSTABLE DRAW BAR
6. COVER
7. VERTICAL LIFTING POINT
8. COMPRESSOR LOUVERS
9. AIR LINE CONNECTION
10. CONTROL PANEL
11. TAILLIGHTS
12. TRAILER FRAME
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.

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Installation
Area
1. The compressor must be operated only in a clean, dry, and well-lit area. Be sure the area can maintain a
temperature range between 35˚F - 110˚ F.
2. Allow sufficient space around the compressor for maintenance access and adequate airflow
3. DO NOT operate the compressor with a tarp, blanket or cover surrounding the machine.
4. The location must allow for adequate, unobstructed airflow for cooling and for the combustion of air in the engine.
CAUTION: If ambient temperature drops below 32˚F, be
sure to protect safety/relief valves and drain valves from
freezing. NEVER operate compressor with temperatures
below 15˚F or above 125˚F.

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Exhaust
1. Never attempt to attach ductwork to the muffler system to allow for installation inside an enclosure. Attaching any
form of ductwork to the muffler system can cause heat buildup and increased exhaust back pressure resulting in
possible exhaust leakage and damage to the compressor.
2. Place the unit so that exhaust fumes will not be directed towards people or towards air intakes.
3. Keep a properly charged fire extinguisher rated “ABC” nearby, and be familiar with its use.
4. Provide and use battery operated or battery backup style carbon monoxide alarms in any structure that is in close
proximity to a running compressor.
5. NEVER run a combustion powered air compressor inside any enclosed or semi enclosed spaces, including but not
limited to homes, garages, basements, sheds, boxes, enclosed truck beds, shipping containers, RVs, or boats. These
spaces can trap poisonous gasses even if you run a fan or open windows. If you start to feel sick, dizzy, or weak
while using the compressor, shut off the engine and get to fresh air RIGHT AWAY. Seek medical attention. You may
have carbon monoxide poisoning.
Lifting and Movement/Forklift
1. Make sure lift operators stay aware while moving the compressor.
2. Be sure to uncrate the compressor prior to movement. Uncrating the compressor will allow a visual reference for
the balance of the unit.
3. Be sure the load is secure and well balanced before moving the compressor.
4. Make sure the forks are fully engaged and level prior to lifting or moving the unit.
5. Keep the unit/load as low as possible while moving and refrain from quick changes in direction.
6. For all other forklift safety standards/regulations please reference OSHA 1910.178- Powered industrial trucks.
CAUTION: Compressors, especially
vertical units, are exceptionally top
heavy. Take care when moving and
do not make fast or sudden moves
during transport.
DANGER: Death or serious injury can result from asphyxiation. Running
engines produce carbon monoxide (CO), a colorless, odorless poisonous
gas. CO generated by the engine can rapidly accumulate even in areas
that appear to be well ventilated. This CO accumulation can result in
dangerous and FATAL concentrations within minutes.

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General Lifting Information
1. Carefully inspect all lifting equipment and ensure it is in good condition. The rated capacity of lifting equipment
must exceed compressor weight. NEVER lift with under sized or damaged equipment.
2. If using lifting equipment, ensure all lifting points are in good condition and tighten any loose nuts or bolts before
lifting. Verify that there are no cracks in the welding points of the slings, of the attachment points or any other
components used for lifting,
3. Ensure the lifting capacity of the equipment is not exceeded by the weight of the combined items being lifted.
4. A sling MUST be used when moving the compressor with a helicopter or other airborne equipment. Be sure to
follow OSHA standards 1910 subpart N.
5. Use guide ropes or equivalent to prevent twisting or swinging of the compressor while it is in the air and NEVER
attempt to lift the unit in high winds. Keep the compressor as low to the ground as possible.
6. Keep everyone away from the compressor when it is lifted. DO NOT allow anyone under the compressor while it is
being lifted.
7. DO NOT use bolts or other hooks on individual components to move the compressor.
8. When moving and or placing the compressor ensure it is on or across a surface that can hold the combined weight
of the compressor and the loading equipment.
9. NEVER store the compressor suspended by its lifting points.
Anchoring
To ensure proper and safe operation of the compressor the unit must be anchored to a flat, smooth surface. Compressors
must be on ¼ inch (6.35mm) MAXIMUM thick rubber anti-vibration pads.
Truck Installation
You can install the compressor in a truck for convenience and portability. Be sure to follow these additional safety
precautions:
1. Bolt the compressor to the truck bed with rubber isolator pads no more than ¼” (6.35mm) thick under the tank
feet. Thicker padding will INCREASE vibration from the unit and greatly increase the chance of the tank cracking or
other unit damage.
2. Portable compressors must be secured during transport to avoid unit damage.
WARNING: Do NOT operate the unit if damaged during shipping, handling
or use. Damage may result in bursting and may cause injury to persons or
property damage. If the unit is received with damage, please contact
customer support as soon as possible.

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Prior to Towing
1. Ensure the enclosure surrounding the unit is correctly closed and secured.
2. Make sure that the tires are in good condition, inflated to the correct pressure, and the lug nuts are tightened to
the correct specification.
3. Verify that all signal lights function correctly, and the connection voltage is 12V.
4. Check the compressor is securely fastened to the trailer.
5. Verify the stand leg is raised and safely locked into position.
6. Make sure that the signal lights and/or reflectors are clean and not damaged.
7. Adjust the draw bar to the height of the towing vehicle and/or towing equipment so that the draw bar is as level as
possible and correctly lock appropriate pins and levers in place.
8. Ensure the hitch ball is locked securely in place and the trailer cannot disconnect from the towing vehicle.
9. Connect signal cables and check the proper function of the lights.
10. Hook the safety chains to the towing equipment.
11. Ensure chains and cables do not interfere with the movement of the compressor or drag along any surface.
12. DO NOT use this equipment to tow or move personnel.
13. DO NOT transport the unit with more than 4 gallons of fuel in it.
14. DO NOT operate the unit while it is in motion and DO NOT operate the unit while the compressor is being towed.
Electrical Safety
1. Follow all NEC and local codes for electrical wiring. Allow only authorized service personnel or certified electricians
to install electrical components.
2. Ensure that incoming service has adequate ampere rating.
3. Do not used mixed wire sizes when wiring the unit.
4. The unit must be properly grounded. DO NOT connect ground to air or cooling lines.
DANGER: Be sure only trained and authorized personnel install and maintain
this compressor in accordance with all applicable federal, local, and state
codes, standards, and regulations. Follow all NEC (National Electric Code)
standards especially those concerning equipment grounding conductors.
DANGER: Improperly grounded electrical components are shock hazards.
Make sure all components are properly grounded to prevent death or serious
injury.

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Battery Component
Varied models of compressor are equipped with an electronic starter but require a customer supplied, 12V battery for
operation. Be sure to follow safety steps and use proper procedures when setting up, connecting, and disconnecting the
battery. Check with your batteries manufacturer for more details.
1. Always wear appropriate eye and skin protection while handling the battery.
2. Batteries can release explosive gasses. NEVER smoke or install a battery near sparks or other ignition sources.
3. Use a minimum of 6 AWG wire for battery cables.
4. Connect positive (+) cable to the start solenoid on the engine.
5. Connect negative (-) cable to one of the engine mounting bolts.
6. Connect the other end of the positive (+) cable to the positive (+) battery terminal.
7. Connect the other end of the negative (-) cable to the negative (-) battery terminal.
8. To disconnect the battery first remove the negative cable from the negative battery terminal, and then disconnect
the positive cable from the positive battery terminal.
Piping (Safety steps)
1. Install appropriate flow-limiting valves as necessary according to the pipe size(s) used and run lengths. This step will
reduce pressure in case of hose failure, per OSHA Standard 29 CFR 1926.302(b)(7).
2. Flow-limiting valves are listed by pipe size and rated CFM. Select appropriate valves according to manufacturer’s
recommendations.
3. Use a flexible connector between the compressor tank and dryer/piping system to minimize noise, vibration, pump
wear, and to prevent damage to the unit or piping system.
4. Install ASME code safety valves and equip the piping system with adequate condensate drains.
DANGER: NEVER install a shut off valve such as a glove or gate valve
between the pump discharge and the air tank unless you have an ASME
rated safety valve rated for the correct pressure installed in the line
between the valve and the compressor pump.
CAUTION: NEVER touch both battery terminals at the same time with hands
or any non-insulated tools. Always follow proper sequence for connecting
and disconnecting the battery. Failure to do so may result in serious injury.

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5. Minimum pipe size for compressed air lines: (Pipe sizes are shown in inches)
CFM
25ft
50ft
100ft
250ft
20
¾
¾
¾
1
40
¾
¾
1
1
60
¾
1
1
1
100
1
1
1
1 –¼
125
1 –¼
125
1 –¼
1 –½
160
1 –¼
1 –½
2
2-½
200
1 –½
2
2-½
2- ¾
6. Check the air systems daily for leaks. Daily check help to prevent any unnecessary load on the compressor and help
to increase energy savings.
7. Examples of air systems:
8. Make sure any tube, pipe, fitting, or hose connected to the unit can withstand operating temperatures and retain
pressure.
9. Never use reducers in discharge piping. Keep all piping and fittings the same size in the piping system.
Closed loop system. Install tee fitting in piping from air to minimize pressure
drop and to allow air flow in two directions.
Air Drop
From Compressor
Elevation View
Air Drop: Install tee fitting with
branch to top to minimize
condensation.
WARNING: Never use plastic (PVC) pipe for compressed air. Serious injury or
death could result. Piping MUST have a pressure rating of 200 PSI or greater.

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Refueling
Internal combustion engines require fuel to operate. Although refueling the engine may seem like a menial task it can be
hazardous if not done properly.
1. DO NOT touch the engine during use. Engines (especially the exhaust) will be hot. Allow time for the engine to cool
down prior to refueling.
2. DO NOT refuel the unit while the engine is running.
3. DO NOT operate the compressor if any fuel has been spilt. Clean up any spilt fuel prior to starting the engine.
4. DO NOT operate or refuel near a pilot light or open flame.
5. DO NOT refuel the unit while smoking or operating a cellular device.
Storage
For long-term storage (6 months or longer) please consult the manufacturer for the proper procedure for storage of the
compressor to ensure no issues develop during the storage period.

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Tire Safety

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