Chicago Pneumatic CPS 185 PD7 Instruction Book

Chicago Pneumatic Portable Compressor

CPS185 PD7

Instruction Book

1310 3012 08 Ed. 0 2009-06

“Copyright 2009, Chicago Pneumatic
Any unauthorized use or copying of the contents or any part of this book is
prohibited. This applies in particular to trademarks, model denominations, part
numbers and drawings.”

No. 1310 3012 08

2009-06

OWNERSHIP DATA

Unit model: Owner's machine no.:

Engine type:

Delivery date: Engine serial no.:

Service plan:

Selected Lubricants

Compressor:

Printed Matter Nos.

Chicago Pneumatic instruction book / rev:

Chicago Pneumatic parts list / rev: Engine parts list:

Local Chicago Pneumatic Representative

Name:

Address:

Telephone: Contact persons: Service:

Telefax:

Unit service no.:

First start-up date:

Capacity:

Chicago Pneumatic logbook:

Parts:

2 1310 3012 08

Contents

1 Safety Precautions for Portable Compressors 4

1.1 Introduction 4

1.2 General Safety Precautions 4

1.3 Safety during use and operation 5

1.4 Safety During Maintenance and Repair 6

1.5 Tool Applications Safety 6

1.6 Batteries 7

1.7 Ether fuel Systems 7

1.8 Pressure vessels 7

1.9 Safety valve 8

1.10 Injury Prevention 8
2 Leading Particulars 9

2.1 Description of Safety Pictograms Used in this Manual 9

2.2 General Description 9

2.3 Main Parts 10

2.4 Air Flow (see Fig. 2.4) 12

2.5 Oil system (see Fig. 2.4) 12

2.6 Continuous regulating system 13

2.7 Electrical System 14
3 Operating Instructions 16

3.1 Parking, Towing And Lifting Instructions 16

3.2 Before Starting 18

3.3 Starting/Stopping (See Fig. 3.3) 18
4 Maintenance 19

4.1 Use of Service Paks 19

4.2 Preventive Maintenance Schedule For The Compressor 19

4.3 Lubrication oils 20

4.4 Cleaning Coolers 21

4.5 Battery Care 21

4.6 Storage 22

4.7 Service Kits 22
5 Adjustments and Servicing Procedures 23

5.1 Adjustment of the Continuous Regulating System (See Fig. 5.1) 23

5.2 Air Filter Engine/Compressor 24

5.3 Air Receiver 25

5.4 Safety Valve 25

5.5 Fuel System (see Fig. 5.4) 25
6 Problem Solving 25

6.1 Problem Solving Chart 26

6.2 Alternator Precautions 26
7 Technical Specifications 29

7.1 Settings of Shutdown Switches and Safety Valve 29

7.2 Compressor/Engine Specifications 29

1310 3012 08 3

IMPORTANT

1 Safety Precautions for Portable Compressors

To be read attentively and acted on accordingly before towing, lifting, operating,
performing maintenance or repairing the compressor

1.1 Introduction

The policy of Chicago Pneumatic is to provide the users of their equipment with safe, reliable and efficient products. Factors taken
into account are among others:

- the intended and predictable future use of the products, and the environments in which they are expected to op erate,

- applicable rules, codes and regulations,

- the expected useful product life, assuming proper service and maintenance.
Before handling any product, take time to read the relevant instruction book. Besides giving detailed operating instructions, it also
gives specific information about safety, preventive maintenance, etc.
These precautions are general and some statements will therefore not always apply to a particular unit.
When handling, operating, overhauling and/or performing maintenance or repair on Chicago Pneumatic equipment, the mechanics
are expected to use safe engineering practices and to observe all relevant local safety requirements and ordinances. The following
list is a reminder of special safety directives and precautions mainly applicable to Chicago Pneumatic equipment.
This brochure applies to machinery processing or consuming air or inert gas. Processing of an y other gas requires additional
safety precaution typical to the application and are not included herein.
All responsibility for any damages or injury resulting from neglecting these precaution: or by non-observance of ordinary caution
and due care required in handling, operating, maintenance or repair, also if not express ly mentioned in this brochure or the
instruction book(s), is disclaimed by Chicago Pneumatic.
If any statement does not comply with local legislation, the stricter of the two shall be applied. Statements in this manual should
not be interpreted as suggestions:, recommendations or inducements that it should be used in violation of any applicabl e laws or
regulations.

1.2 General Safety Precautions

1 The owner is responsible for maintaining the unit in a safe operating condition. Unit parts and accessories must be replaced if

missing or unsuitable for safe operation.

2 Use only lubricating oils and greases recommended or a pproved by Chicago Pneumatic or the machine manufacturer.

Ascertain that the selected lubricants comply with all applicable safety regulations, especially with regard to explosion or fire
risk and the possibility of decomposition or generation of hazardous gases.

3 The supervisor, or the responsible person, shall at all times make sure that all instructions regarding machinery and equipment

operation and maintenance are strictly followed and that the machines with all accessories and safety devices, including the
entire compression or vacuum system with pipes, valves, connectors, hoses, etc., as well as the consuming devices, are in
good repair, free of abnormal wear or abuse, and are not tampered with.

4 Maintenance, overhaul and repair work shall only be carried out by adequately train ed personnel; if required, under

supervision of someone qualified for the job.

5 Whenever there is an indication or any suspicion that an internal part of a machi ne is overheated, the machine shall be

stopped. No inspection covers shall be opened before sufficient cooling time has elapsed; this is to avoid the risk of

spontaneous ignition of the oil vapor when air is admitted.
6 Maintenance work, other than routine attention, shall only be undertaken when the machine is turned off.
7 Before dismantling any pressurized component, the compressor or the eq uipment shall be effectively isolated from all sources

of pressure and be completely vented to atmosphere. In addition, a warning sign bearing a legend such as "work in progress;

do not open" shall be attached to each of the isolating valves.
8 Before a machine is being repaired, steps shall be taken to prevent inadvertent starting. In addition, a warning sign bearing a

legend such as "work in progress; do not start" shall be attached to the starting equipment. The battery shall be disconnected

and removed or the terminals covered by insulating caps.
9 Normal ratings (pressures, temperatures, speeds, etc.) shall be durably marked.
10 Never operate a machine or equipment beyond its rated limits (pressure, temperature, speed, etc.).
11 Maintenance and repair work should be recorded in an oper ator's logbook for all machinery. Frequency and nature of repairs

can reveal unsafe conditions.

12 The machinery and pneumatic equipment shall be kept clean, i.e. as free as possible from oil, dust or other deposits.
13 To prevent an increase in working temperature, inspect and clean heat transfer surfaces (cooler fins, intercoolers, water

jackets, etc.) regularly. For every machine establish a suitable time interval for cleaning operations.

14 All regulating and safety devices shall be maintained with due care to ensure that they function properly. They may not be by-

passed.

15 Care shall be taken to avoid damage to safety valves and other pressure relief devices, especially to avoid plugging by paint,

oil coke or dirt accumulation, which could interfere with the functioning of the device.

16 Pressure and temperature gauges shall be checked regularly with regard to their accuracy. They shall be replaced whenever

outside acceptable tolerances.

17 Parts shall only be replaced by genuine Chicago Pneumatic replacement parts.

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18 Safety devices shall be tested as described in the maintenance schedule of the instruction book(s) to determine that they are

in good operating condition.

19 Never use flammable solvents or carbon tetrachloride for cleaning parts. Take safety precautions against toxic vapors when

cleaning parts in or with cleaning products.

20 Observe scrupulous cleanliness during maintenance and repair. Keep away dirt by covering the parts and exposed openings

with clean cloth, paper or tape.

21 Protect the engine, alternator, air intake filter, electrical and regulating components, etc. to prevent moisture ingress, e.g. when

steam-cleaning.

22 When performing any operation involving heat, flames or sparks on a machine, the surrounding components shall first be

screened with non-flammable material.
23 Never use a light source with open flame for inspecting the interior of a machine, pressure vessel, etc.
24 On portable units, support the drawbar and axle(s) securely if working underneath the units or when removing a wheel. Do not

rely on jacks.
25 Prior to stripping a compressor, engine or other machine or undertaking major overhaul on it, prevent all movable parts with a

mass exceeding 15 kg (30 lbs) from rolling over or moving.
26 When repair has been completed, make sure that no tools, loose parts or rags are left in, or on, the machine, the prime mover

or the driving gear. The machine shall be barred several revolutions to ensure that there is no mechanical interference within

the machine or driver.

1.3 Safety during use and operation

To lift a unit, all loose or pivoting parts, e.g. doors shall first be securely fastened. Do not attach cables, chains or ropes directly to
the lifting eye; apply a crane hook or lifting shackle meeting local safety rules.

Helicopter lifting using the lifting eye is forbidden.
It is strictly forbidden to dwell or stay in the risk zone under a lifted load. Never lift the unit over people or residential areas.
Lifting acceleration and retardation shall be kept within safe limits.

1 Before towing the unit:

- ascertain that the pressure vessel is depressurized,

- check the drawbar, the brake system and the towing eye. Also check the coupling of the towing vehicle,

- check that the pivot wheel or stand leg is safely locked in the raised position,

- ascertain that the towing eye can swivel freely on the hook,

- check that the wheels are secure and that the tires are in good condition and inflated correctly,

- connect the signal cable, check all lights and connect the pneumatic brake couplers,

- attach the safety break-away cable to the towing vehicle,

- remove wheel chocks, if applied, and disengage the parking brake.

- Apply safety chains to tow vehicle.
2 If the unit is to be backed up by the towing vehicle, disengage the overrun brake mechanism (if equipped).
3 Never exceed the maximum towing speed of the unit.
4 Place the unit on level ground and chock the wheels before disconnecting the unit from the towing vehicle. Unclip the safety

break-away cable

5 When the unit has to operate in a fire-hazardous environment, each engine exhaust has to be provided wit h a spark arrestor to

trap incendiary sparks.

6 The exhaust contains carbon monoxide which is a lethal gas. When the unit is used in a confined space, conduct the engine

exhaust to the outside atmosphere by a pipe of sufficient diameter (min. 4 inches); do this in such a way that no extra back
pressure is created for the engine. If necessary, install an extractor.

7 When operating in a dust-laden atmosphere, place the unit so that dust is not carried towards it by the wind. Operation in

clean surroundings considerably extends the intervals for cleaning the air intake filters and the cores of the coolers.

8 Locate the unit away from walls. Take all precautions to ensure that hot air exhausted from the engine and driven machine

cooling systems cannot be recirculated. If such hot air is taken in by the engine or driven machine cooling fan, this may cause
overheating of the unit; if taken in for combustion, the engine power will be reduced.

9 No external force may be exerted on the air outlet valves, e.g. by pulling on hoses or by installing auxiliary equipment directly

to a valve, e.g. a water separator, a lubricator, etc.

10 Distribution pipework and air hoses must be of correct size and suitable for the working pressure.

Never use frayed, damaged or deteriorated hoses. Replace hoses and flexibles of which the lifetime expired. Use only the
correct type and size of hose end fittings and connections. Install safety pins on quick type hose connections.
A hose connected to a 2 inch (50 mm) valve must be provided with a safety wire (8 mm) fixed to the hose for effective
pressures as from 145 psi (10 bar) up, although it is recommended to apply such safeguard already from (60 psi) 4 bar up.
The safety wire ends have to be attached, one to the eye provided next to the compressor air outlet valve, the other one to a
point near to the air inlet of the applied equipment.
Finally a wire mesh hose can be fixed over the hose ends to dampen the blast in case a connection starts leaking or should
become undone.
Close the compressor air outlet valve before connecting or disconnecting a hose. Ascertain that a hose is fully depressurized
before disconnecting it.
When blowing through a hose or air line, ensure that the open end is held securely. A free end will whip and may cause injury.
Never play with compressed air. Never apply it to your skin or direct an air stream at people. Never use it to clean dirt from
your clothes. When using it to clean down equipment, do so with extreme caution and use eye protection.

1310 3012 08 5

11 Never move a unit when external lines or hoses are connected to the outlet valves, to avoid damage to valves and/or manifold

and hoses.

12 Never refill fuel while the unit is running. Keep fuel away from hot parts such as air outlet pipes or the engine exhaust. Do not

smoke when fueling. When fueling from an automatic pump, a ground cable should be co nnected to the unit to discharge
static electricity. Never spill nor leave oil, fuel, coolant or cleansing agent in or around the unit.

13 Never operate the unit in surroundings where there is a possibility of taking in flammable or toxic fumes.
14 Never operate the unit at pressures or speeds below or in excess of the limit ratings stated on the Principal Data sheet.
15 On water-cooled engines with closed cooling circuit: allow the unit to cool before removing a pressure cap.
16 All doors shall be shut during operation so as not to disturb the cooling air flow inside the body-work and/or render the

silencing less effective. A door should be kept open for a short period only, e.g. for inspection or adjustment

17 Wear ear protectors when environmental noise can reach or exceed 85 dB(A). Beware of long-time exposure to noise.
18 Periodically check that:

- all safety equipment is in good working order,

- all guards and air conducting baffles are in place and securely fastened,

- all hoses and/or pipes inside the unit are in good condition, secure and not rubbing,

- there are no fuel, oil or coolant leaks,- all fasteners are tight

- all electrical leads are secure and in good order,

- the engine exhaust system is in good condition,

- air outlet valves and manifold, hoses, couplings, etc. are in good repair, free of wear or abuse,

- the wheel nuts are tightened to the proper torque.

When more than one compressor is connected to a common header, be sure each compressor has a non-return valve (check
valve) to prevent reverse rotation when stopping.

1.4 Safety During Maintenance and Repair

Maintenance and repair work shall only be carried out by adequately trained personnel: if required, under supervision of someone
qualified for the job.
1 Use only the correct tools for maintenance and repair work.
2 Use only genuine spare parts.
3 All maintenance work, other than routine attention, shall only be undertaken when the unit is stopped. Ensure that the unit

cannot be started inadvertently.

4 Before removing any pressurized component, effectively isolate the compressor from all sources of pressure and relieve the

entire system of pressure. Do not rely on non-return valves (check valves) to isolate pressure systems.

5 Never use flammable solvents or carbon tetrachloride for cleaning parts. Take safety precautions ag ainst toxic vapors from

cleaning liquids.

6 Scrupulously observe cleanliness during maintenance and whe n performing repairs. Keep dirt away by covering the parts and

exposed openings with a clean cloth, paper or tape.

7 Never weld on or perform any operation involving heat near the fuel or oil systems. Fuel and oil tanks mu st be completely

purged, e.g. by steam-cleaning, before carrying out such operations.
Never weld on, or in any way modify, pressure vessels. Disconnect the alternator cables during arc welding on the unit.

8 Support the drawbar and the axle securely if working underneath the unit or when removing a wheel. Do not rely on jacks.
9 Make sure that no tools, loose parts or rags are left in or on the unit.
10 Before clearing the unit for use after maintenance or overhaul, check that operating pressures, temperatures and speeds are

correct and that the control and shutdown devices function correctly.

11 Do not remove any of, or tamper with, the sound damping material. Keep the material free of dirt and liquids such as fuel, oil

and cleansing agents.

12 Protect the electrical and regulating components, the air filter, etc. to prevent moisture from entering them, e.g. when steam-

cleaning.

1.5 Tool Applications Safety

Apply the proper tool for each job. With the knowledge of correct tool use and knowing the limitations of tools, along with some
common sense, many accidents can be prevented.
Special service tools are available for specific jobs and should be used when recommended. The use of these tools will save time
and prevent damage to parts.
1 Use only wrenches or sockets whose size fits the fastener.
2 Apply an open-end wrench only in the place of the fastener head, square to the thread axis.
3 Do not use a pipe or other improvised leverage extensions on handles.
4 Do not hammer on wrenches or other tools which are not specially designed for it.
5 Always support the ratchet head when using socket extensions.
6 Discard any wrench with broken or battered points or edges.
7 Never use hand type sockets on power or impact tools.
8 Select only heavy-duty impact sockets for use with pneumatic or electric impact tools.
9 Replace sockets showing cracks or wear; keep sockets clean.
10 Never use screwdrivers for prying, punching, chiseling, scoring or scraping.
11 Use the correct type and size of screwdriver for the job. The bit must match the fastener.
12 A screwdriver with rounded edges will slip; it needs to be redressed or discarded.

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13 Never use a screwdriver or any other tool near a live wire or electrical component. Plastic covering of handles is for comfort

and grip only. They are not intended to act as insulation if such is not clearly marked by the manufacturer.
14 Never strike a hammer against a hardened object; use a soft drift against the object and strike against the drift.
15 Strike the object with the full face of the hammer.
16 Never use a hammer with a loose head.
17 Discard a hammer with chipped or mushroomed face.
18 Never use a chisel or punch with a chipped or mushroomed striking face.
19 Always pull on a wrench or socket handle, if possible, and adjust your stance to prevent a fall if something lets go.
20 Wear approved eye protection when using percussion tools or when scraping, chipping, shaving or grinding.
21 Wear protective gloves when holding a chisel or punch.

1.6 Batteries

1 The electrolyte in batteries is a sulphuric acid solution which can be fatal if swallowed and can cause blindness if the solution

contacts your eyes. It will also cause burns if it contacts your skin. Therefore, be careful when handling batteries, e.g. when

checking the charge condition.
2 Install a sign prohibiting fire, open flame and smoking at the post where batteries are being charged.
3 When batteries are being charged, an explosive gas mixture forms in the cells and might escape through the vent holes in the

plugs.
Thus an explosive atmosphere may form around the battery if ventilation is poor, and can remain in and around the battery for

several hours after it has been charged.

Therefore:

- never smoke near batteries being, or having recently been, charged,

- never break live circuits at battery terminals, because a spark usually occurs.

4 When connecting an auxiliary battery (AB) in parallel to the unit battery (CB) with booster cables: connect the + pole of AB to

the + pole of CB, then connect the - pole of AB to the mass of the unit. Disconnect in the reverse order. Incorrect connection

will damage alternator.

1.7 Ether fuel Systems

Ether fuel systems are used for diesel cold starting.
1 Do not use ether as a starting aid in conjuntion with other stating aids (i.e. glow plug, air intake heater etc..) as an explosive

condition may result in severe engine damage or personal injury.
2 This type of fuel is extremely flammable, toxic and poisonous. Avoid contact with eyes or skin and breathing the fumes. If

accidentally swallowed, do not induce vomiting but call a physician immediately.
3 If fuel enters or fumes irritate the eyes, flush the latter with large quantities of clean water and call for medical aid.
4 Before operating ether cold starting aids, read the instructions and the container label.
5 Never operate ether cold starting aids while the engine is running as this can cause severe damage.
6 When maintenance, tests or repair has to be performed, do so in a well-ventilated area only, away from heat, open flame or

sparks. Ascertain that the area is clearly marked out with signs prohibiting fire, open flame and smoking.
7 Wear eye protection when testing a system. Make sure that openings of a spray container, valve, tube or atomizer are pointed

away from yourself and others while testing.
8 Do not store ether containers in temperatures above 160 ºF (70ºC),
9 Do not incinerate, puncture or attempt to remove the center core valve, side safety valve or any other part of an ether

container.

1.8 Pressure vessels

Maintenance / installation requirements:

1 The vessel can be used as a pressure vessel or as a separator and is designed to hold compressed air for the following

applications:

- pressure vessel for compressor.

- medium AIR/OIL,

and operates as detailed on the data plate of the vessel:

- the maximum working pressure in psi,

2 The pressure vessel is only to be used for the applications as specified above and in accordance with the technical

specifications. Safety reasons prohibit any other applications.
3 National legislation requirements with respect to re-inspection must be complied with.
4 No welding or heat treatment of any kind is permitted to those vessel walls which are exposed to pressure.
5 The vessel is provided and may only be used with the required safety equipment such as pressure guage, overpressure

control devices, safety valve, etc.
6 Draining of condensate shall be performed regularly when vessel is in use.
7 Installation, design and connections should not be changed.
8 Bolts of cover and flanges may not be used for extra fixation.

1310 3012 08 7

1.9 Safety valve

All adjustments or repairs are to be done by an authorized representative of the valve supplier.
Following checks must be carried out:
1 A check of the opening of the lifting gear,1 or 2 times a year. This can be done by lifting the ring or lever.
2 A check of the set pressure once a year according to the local regulations, if required. This check may not be done with the

compressor supplying the air pressure and must be carried out on a proper test bench.

1.10 Injury Prevention

1 Stationary housing guards are provided on all rotating or reciprocating parts not otherwise protected and which may be

hazardous to personnel. Machinery shall never be put into operation, when such guards have been removed, operate only
when guards are securely reinstalled.

2 Do not open electrical cabinets, cubicles or other equipment while voltage is supplied. If such cannot be avoided, e.g. for

measurements, tests or adjustments, have the action carried out by a
qualified electrician only, with appropriate tools, and ascertain that the required bodily protection against electrical hazards is
applied.
3 Noise, even at reasonable levels, can cause irritation and disturbance which, over a long period of time, may cause

severe injuries to the nervous system of human beings.

When the sound pressure level, at any point where personnel normally has to attend, is:

below 70 dB(A): no action needs to be taken,
above 70 dB(A): noise-protective devices should be provided for people continuously being present in the room,
below 85 dB(A): no action needs to be taken for occasional visitors staying a limited time only,
above 85 dB(A): room to be classified as a noise-hazardous area and an obvious warning shall be placed permanently at

each entrance to alert people entering the room, for even relatively short times, about the need to wear ear
protectors,

above 95 dB(A): the warning(s) at the entrance(s) shall be completed with the recommendation that also occasio nal visitors

shall wear ear protectors,

above 105 dB(A): special ear protectors t hat are adequate for this noise level and the spectral composition of the noise shall

be provided and a special warning to that effect shall be placed at each entrance.

4 Insulation or safety guards of parts the temperature of which can be in excess of 80 ºC (175 ºF) and which may be accidentally

touched by personnel shall not be removed before the parts have cooled to room temperature.

5 When hot parts have to be handled, e.g. shrink fitting, special heat-resistant gloves shall be used and, if required, other body

protection shall be applied.

6 If the working process produces fumes, dust or vibration hazards, etc., take the necessary steps to eliminate the risk of

personnel injury.

7 Before lifting machines, all loose parts which could be liable to fall down shall be removed or secured; pivoting parts such as

doors, etc. shall be safely immobilized.

8 To lift heavy parts, a hoist of ample capacity, tested and approved according to local safety regulations, shall be used.
9 When lifting machinery, only hooks or shackles meeting local safety regulations shall be applied. Never shall cables, chains or

ropes be applied directly on or through lifting eyes. Never allow sharp bends in lifting cables, chains or ropes.

10 Lifting hooks, eyes, shackles, etc. shall never be bent and shall only have stress in line with their design load axis. The

capacity of a lifting device diminishes when the lifting force is applied at an angle to its load axis.

11 For maximum safety and efficiency of the lifting apparatus all lifting members shall be applied as near to perpendicular as

possible. If required, a lifting beam shall be applied between hoist, and load.

12 When heavy parts are being lifted with a hoist, it is strictly forbidden to dwell or pass under the load or in the space which is

liable to be hit if the load or part of it should topple over or come loose. Never leave a load hanging on a hoist. Lifting
acceleration and retardation shall be kept within safe limits.

13 A hoist has to be installed in such a way that the object will be lifted perpendicular. If that is not possible, the necessary

precautions must be taken to prevent load-swinging, e.g. by using two hoists, each at approximately the same angle not
exceeding 30deg from the vertical.

14 When using compressed air or inert gas to clean down equipment, do so with caution and use the appropriate protection, at

least safety glasses, for the operator as well as for any bystander. Do not apply compressed air or inert gas to your skin or
direct an air or gas stream at people. Never use it to clean dirt from your clothes.

15 Before blowing compressed air or inert gas through a hose, ensure that the open end is held securely, so that it cannot whip

and cause injury.

16 When washing parts in or with a cleaning solvent, provide the required ventilation and use appropriate protection such as a

breathing filter, safety glasses, rubber apron and gloves, etc.

17 Safety shoes should be compulsory in any workshop and if there is a risk, however small, of failing objects, wearing of a sa

helmet should be included.

18 If there is a risk of inhaling hazardous gases, fumes or dust, the respiratory organs must be protected and, depending on the

nature of the hazard, so must the eyes and skin.

19. Remember that where there is visible dust, the finer, invisible particles will almost certainly be present too; but the fact that no
dust can be seen is not a reliable indication that dangerous, invisible dust is not present in the air.

20. When using cartridge type breathing filter equipment, ascertain that the correct type of cartridge is used and that its useful
service life is not surpassed.

fety

8 1310 3012 08

2 Leading Particulars

2.1 Description of Safety Pictograms Used in this Manual

f This symbol draws your attention to dangerous situations. The operation concerned may endanger persons and

cause injuries.

+ This symbol is followed by supplementary information.

Fig. 2.1 General view of CPS 185 PD7

2.2 General Description

The CPS 185 is a silenced, single-stage, oil-injected screw compressor, built for anl effective working pressure of 100 psi (7 bar).

— Engine

The compressor is driven by a water-cooled diesel engine. The engine’s power is transmitted to the compressor through a fle x ible
coupling.

— Compressor

The compressor casing houses two screw-type rotors, mounted on ball and roller bearings. The male rotor, driven by the engine,
drives the female rotor. The male rotor has four lobes and the female rotor has six flutes. Thus, the male rotor revolves at 1 1/2
times the speed of the female rotor. The element delivers pulsation-free air.
Injected oil is used for sealing, cooling and lubricating purposes.

— Compressor Oil System

The oil is boosted by air pressure. The system has no oil pump.
The oil is removed from the air, in the air/oil vessel first by centrifugal force, second through the oil separator element. The vessel
is provided with an oil level indicator.

— Regulation

The compressor is provided with a continuous regulating system and a blow-down valve which is integrated in the unloader
assembly. The valve is closed during operation by outlet pressure of the compressor element and opens by air receiver pressure
when the compressor is stopped.
When the air consumption increases, the air receiver pressure will decrease and vice versa.
This receiver pressure variation is sensed by the regulating valve which, by means of control air to the unl oader and engine speed
regulator, matches the air output to the air consumption. The air receiver pressure is maintained between the pre-selec ted working
pressure and the corresponding unloading pressure.

— Cooling System

Engine and compressor are provided with a radiator and oil cooler. T he cooling air is generated by a fan, driven by the engine.

— Safety Devices

A thermal shut-down switch protects the compressor against overheating. The air receiver is provided with a safety valve.
The engine is equipped with low oil pressure and high coola nt temperature shut-down switches and an alternator/V-belt protection
system.

— Frame and Axle

The compressor/engine unit is supported by rubber buffers in the frame.
The standard CPS 185 PD7 is equipped with a non-adjustable drawbar with a towing eye and road lighting.
As an option, the unit can be equipped with electric or hydraulic braking systems.
When driving backwards the hyduralic brake is not engaged automatically.

— Bodywork

The bodywork has openings at the shaped front and rear end for the intake and outlet of cooling air and a specially hinged canopy
for maintenance and service operations. The bodywork is partially lined with sound-absorbing material.

— Lifting Eye

A lifting eye is accessible through the roof panel at the top of the unit.

— Control Panel

The control panel grouping the air pressure gauge, control switch etc., is placed at rear of air compressor.

— Data Plate

The compressor is furnished with a data plate located on the front, drivers side of the unit showing the compressor type, serial
number, maximum final pressure and normal working pressure.

1310 3012 08 9