Atlas Copco XAS 175 Dd User manual

ATLAS COPCO – PORTABLE AIR DIVISION
B-2630 AARTSELAAR BELGIUM
Instruction Manual and Parts List
for Portable Compressors
XA(S)175 Dd
Registration code
Collection: APCX1
Tab: 38
Printed matter N°
2950 0892 00
1998 – 05
PAGE
Instruction manual for portable compressors.............................................................3
Instructieboek voor transportabele compressoren.............................................35
Manuel d'instructions pour compresseurs mobiles............................................67
Bedienungsanleitung fŸr fahrbare Kompressoren..............................................99
Libro de instrucciones para compresores transportables ........................131
Instruktionsbok fšr transportabla kompressorer ................................................163
Istruzioni per l'uso di compressori mobili ..................................................................195
Bruksanvisning for mobil kompressorer.....................................................................227
Instruktionsbog til mobile kompressorer....................................................................259
BÈ‚Ï›Ô Ô‰ËÁÈÒÓ ÁÈ · ÊÔÚËÙÔ‡˜ Û˘ÌÈÂÛÙ¤˜..................................................................291
Manual de instru•›es para compressores port‡teis......................................323
SiirrettŠvien kompressorin ohjekirja...............................................................................355
Parts list Ð Onderdelenlijst Ð Liste de pi•ces Ð Ersatzteilliste Ð
Lista de las partes Ð Reservdelsfšrteckning Ð Listino parti di
ricambio Ð Deleliste Ð Reservedelsliste Ð K·Ù¿ÏÔÁÔ˜
EÍ·ÚÙËÌ¿ÙˆÓ Ð Lista de pe•as Ð Osaluettelo.....................................................387
GlossaryÐ Woordenlijst Ð Glossaire Ð Glossar Ð Glosario Ð
Ordlista Ð Glossario Ð Ordliste Ð Ordliste Ð °ÏˆÛÛ·ÚÈÔ Ð
Gloss‡rio Ð Sanasto ......................................................................................................................485
2950 0892 00 EN
1998 - 05

XA(S)175 Dd
2

INSTRUCTION MANUAL
3
Congratulations on the purchase of your XA(S)175 Dd
compressor. It is a solid, safe and reliable machine, built
according to the latest technology. Follow the instructions
in this booklet and we guarantee you years of troublefree
operation. Please read the following instructions carefully
before starting to use your machine.
Always keep the manual available near the machine.
In all correspondence always mention the compressor type
and serial number, shown on the data plate.
The company reserves the right to make changes without
prior notice.
CONTENTS PAGE
1. Safety precautions for portable compressors....................5
– Introduction......................................................................................................5
– General safety precautions ................................................................5
– Safety during use and operation ..................................................6
– Safety during maintenance and repair ....................................6
– Tool applications safety........................................................................7
– Specific safety precautions................................................................7
– Batteries ..............................................................................................................7
– Ether fuel systems......................................................................................7
– Pressure vessels..........................................................................................7
– Safety valve ......................................................................................................8
– 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 Markings and information labels......................................10
2.4 Main parts..........................................................................................11
2.5 Air flow ................................................................................................13
2.6 Oil system..........................................................................................13
2.7 Speed regulating and unloading system ..................13
2.8 Electrical system..........................................................................14
2.8.1 Circuit Diagram ............................................................................14
2.8.2 Description ......................................................................................15
3. Operating instructions............................................................................16
3.1 Parking, towing and lifting instructions........................16
3.1.1 Parking instructions....................................................................16
3.1.2 Towing instructions ....................................................................16
3.1.3 Lifting instructions ......................................................................17
3.2 Before starting................................................................................17
3.3 Starting/Stopping ........................................................................18
3.4 During operation ..........................................................................19
CALIFORNIA
Proposition 65 Warning
Diesel engine exhaust and some of
its constituents are known to the
State of California to cause cancer,
birth defects, and other reproductive
harm.

XA(S)175 Dd
4
CONTENTS PAGE
4. Maintenance......................................................................................................20
4.1 Use of service paks ..................................................................20
4.2 Preventive maintenance schedule
for the compressor ....................................................................20
4.3 Lubrication oils ..............................................................................21
4.4 Oil level check................................................................................21
4.4.1 Check engine oil level..............................................................21
4.4.2 Check compressor oil level..................................................21
4.5 Oil and oil filter change ..........................................................22
4.5.1 Engine oil and oil filter change..........................................22
4.5.2 Compressor oil and oil filter change ............................22
4.6 Cleaning coolers..........................................................................22
4.7 Battery care......................................................................................23
4.7.1 Activating a dry-charged battery ....................................23
4.7.2 Electrolyte..........................................................................................23
4.7.3 Recharging a battery................................................................23
4.7.4 Battery maintenance ................................................................23
4.8 Storage................................................................................................23
4.9 Service kits ......................................................................................23
4.10 Compressor element overhaul ..........................................23
5. Adjustments and servicing procedures ................................24
5.1 Adjustment of the regulating valve ................................24
5.2 Air filter engine/compressor ................................................25
5.2.1 Main parts..........................................................................................25
5.2.2 Recommendations......................................................................25
5.2.3 Cleaning the dust trap ............................................................25
5.2.4 Replacing the air filter element..........................................26
5.3 Air receiver ......................................................................................26
5.4 Safety valve......................................................................................26
5.5 Fuel system......................................................................................26
5.6 Brake (= option) adjustment................................................27
5.6.1 Brake shoe adjustment ..........................................................27
5.6.2 Brake cable adjustment..........................................................27
5.6.3 Test procedure of brake adjustment ............................27
CONTENTS PAGE
6. Problem solving............................................................................................28
6.1 Problem solving chart ..............................................................28
6.2 Alternator precautions..............................................................28
7. Available options ........................................................................................32
8. Technical specifications ........................................................................33
8.1 Torque values ................................................................................33
8.1.1 For general applications ........................................................33
8.1.2 For important assemblies......................................................33
8.2 Settings of shut-down switches and
safety valves....................................................................................33
8.3 Compressor/engine specifications ................................33
8.4 Conversion list of SI units into British units ..............34
9. Dataplate ..............................................................................................................34

5
INTRODUCTION
The policy of Atlas Copco 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 operate,
– 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 Atlas
Copco 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 Atlas Copco
equipment.
This brochure applies to machinery processing or consuming air or inert gas.
Processing of any other gas requires additional safety precautions typical to
the application and are not included herein.
All responsibility for any damage or injury resulting from neglecting these
precautions or by non-observance of ordinary caution and due care required
in handling, operating, maintenance or repair, also if not expressly
mentioned in this brochure or the instruction book(s), is disclaimed by Atlas
Copco.
If any statement does not comply with local legislation, the stricter of the two
shall be applied. Statements in this brochure should not be interpreted as
suggestions, recommendations or inducements that it should be used in
violation of any applicable laws or regulations.
GENERAL SAFETY PRECAUTIONS
1The 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.
2Use only lubricating oils and greases recommended or approved by Atlas Copco 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.
3The 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.
4Maintenance, overhaul and repair work shall only be carried out by adequately trained
personnel; if required, under supervision of someone qualified for the job.
5Whenever there is an indication or any suspicion that an internal part of a machine is
overheated, the machine shall be stopped but no inspection covers shall be opened
before sufficient cooling time has elapsed; this to avoid the risk of spontaneous
ignition of the oil vapour when air is admitted.
6Maintenance work, other than routine attention, shall only be undertaken when the
machine is standing still.
7Before dismantling any pressurized component, the compressor or the equipment
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.
8Before 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. On engine-driven units the
battery shall be disconnected and removed or the terminals covered by insulating
caps. On electrically driven units the main switch shall be locked in open position
and the fuses shall be taken out. A warning sign bearing a legend such as „work in
progress; do not supply voltage“ shall be attached to the fuse box or main switch.
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 operator’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 put out of action.
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 Atlas Copco replacement parts.
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 vapours 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 motor, 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 towbar 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 over at least one revolution for reciprocating machines, several revolutions for
rotary ones to ensure that there is no mechanical interference within the machine or
driver. Check the direction of rotation of electric motors when starting up the machine
initially and after any alteration to the electrical connection(s) or switch gear, to check
that the oil pump and the fan function properly.
--SAFETY PRECAUTIONS FOR PORTABLE COMPRESSORS--
To be read attentively and acted accordingly before towing, lifting, operating,
performing maintenance or repairing the compressor

6
SAFETY DURING USE AND OPERATION
To lift a unit, all loose or pivoting parts, e.g. doors and towbar, 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.
Helicopterlifting 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(s) is (are) depressurized,
–check the towbar, 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 tyres are in good condition and
inflated correctly,
–connect the signalisation 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.
2If the unit is to be backed up by the towing vehicle, disengage the overrun brake
mechanism.
3Never exceed the maximum towing speed of the unit.
4Place the unit on level ground and apply the parking brake before disconnecting the
unit from the towing vehicle. Unclip the safety break-away cable. If the unit has no
parking brake the support of the towbar partly acts as a brake; it is recommended to
immobilize the unit by placing chocks before or behind the wheels.
When the towbar can be positioned vertically, the locking device must be applied and
kept in good order.
5When the unit has to operate in a fire-hazardous environment, each engine exhaust
has to be provided with 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. 100 mm); do this in such a way that no extra back pressure
is created for the engine. If necessary, install an extractor.
7When 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.
8Locate the unit away from walls. Take all precautions to ensure that hot air exhausted
from the engine and driven machine cooling systems cannot be re-circulated. 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.
9No 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.
A hose connected to a 2 inch (50 mm) valve must be provided with a safety wire (Ø 8
mm) fixed to the hose (each 500 mm) for effective pressures as from 10 bar (145 psi)
up, although it is recommended to apply such safeguard already from 4 bar (60 psi)
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.
Do not use compressed air from any type of compressor, without taking extra
measures, for breathing purposes as this may result in injury or death. For breathing
air quality, the compressed air must be adequately purified according to local
legislation and standards.
Breathing air must always be supplied at stable, suitable pressure.
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 fuelling. When fuelling from
an automatic pump, an earthing cable should be connected 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 90 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,
– the tension of drive belts is correct,
– 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.
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.
3All maintenance work, other than routine attention, shall only be undertaken when the
unit is stopped. Ensure that the unit cannot be started inadvertently.
4Before 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.
5Never use flammable solvents or carbon tetrachloride for cleaning parts. Take safety
precautions against toxic vapours of cleaning liquids.
6Scrupulously observe cleanliness during maintenance and when performing repairs.
Keep dirt away by covering the parts and exposed openings with a clean cloth, paper
or tape.
7Never weld on or perform any operation involving heat near the fuel or oil systems.
Fuel and oil tanks must 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.

7
8Support the towbar and the axle(s) 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 shut-down
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.
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 spanners or sockets whose opening fits the fastener.
2Apply an open-end spanner only in the plane of the fastener head, square to the
thread axis. Never cock an open-end spanner.
3 Do not use a pipe or other improvised leverage extensions on handles.
4Do not hammer on spanners or other tools which are not specially designed
therefore.
5Do not use adjustable spanners to tighten or slacken fasteners; they are intended to
hold the other end of the fastener.
6 Always support the ratchet head when using socket extensions.
7 Discard any spanner with broken or battered points or edges.
8 Never use hand type sockets on power or impact tools.
9 Select only heavy-duty impact sockets for use with pneumatic or electric impact tools.
10 Replace sockets showing cracks or wear; keep sockets clean.
11 Never use screwdrivers for prying, punching, chiselling, scoring or scraping.
12 Use the correct type and size of screwdriver for the job. The bit must match the
fastener.
13 A screwdriver with rounded edges will slip; it needs to be redressed or discarded.
14 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.
15 Never strike a hammer against a hardened object; use a soft drift against the object
and strike against the drift.
16 Strike the object with the full face of the hammer.
17 Never use a hammer with a loose head.
18 Discard a hammer with chipped or mushroomed face.
19 Never use a chisel or punch with a chipped or mushroomed striking face.
20 Always pull on a spanner or socket handle, if possible, and adjust your stance to
prevent a fall if something lets go.
21 Wear approved eye protection when using percussion tools or when scraping,
chipping, shaving or grinding.
22 Wear protective gloves when holding a chisel or punch.
SPECIFIC SAFETY PRECAUTIONS
Batteries
1The electrolyte in batteries is a sulphuric acid solution which is fatal if it hits your
eyes, and which can cause burns if it contacts your skin. Therefore, be careful when
handling batteries, e.g. when checking the charge condition.
2Install a sign prohibiting fire, open flame and smoking at the post where batteries are
being charged.
3When 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.
4When 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 CB to the mass of the unit. Disconnect in the reverse order.
Ether fuel systems
Ether fuel systems are used for diesel cold starting.
1This type of fuel is extremely flammable, toxic and poisonous. Avoid contact with
eyes or skin and breathing the fumes. If accidently swallowed, do not induce vomiting
but call a physician immediately.
2If fuel enters or fumes irritate the eyes, flush the latter with large quantities of clean
water and call for medical aid.
3 Before operating ether cold starting aids, read the instructions and the container label.
4Never operate ether cold starting aids while the engine is running as this can cause
severe damage.
5When 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.
6Wear 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.
7Do not store ether containers in temperatures above 70 °C (160 °F).
8Do not incinerate, puncture or attempt to remove the centre core valve, side safety
valve or any other part of an ether container.
Pressure vessels
(according to directive 87/404/EEC annex II § 2)
Maintenance/installation requirements:
1The vessel can be used as pressure vessel or as separator and is designed to hold
compressed air for the following application:
– pressure vessel for compressor,
– medium AIR/OIL,
and operates as detailed on the data plate of the vessel:
– the maximum working pressure ps in bar,
– the maximum working temperature Tmax in °C,
– the minimum working temperature Tmin in °C,
– the capacity of the vessel V in l.
2The 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.
3National legislation requirements with respect to re-inspection must be complied
with.
4No welding or heat treatment of any kind is permitted to those vessel walls which are
exposed to pressure.
5The vessel is provided and may only be used with the required safety equipment such
as manometer, overpressure control devices, safety valve, etc.

8
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.
Safety valve
All adjustments or repairs are to be done by an authorized representative of the valve
supplier.
Following checks must be carried out:
1A check of the opening of the lifting gear, 1 or 2 times a year. This can be done by
screwing the cap of the valve anti-clockwise.
2A 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.
INJURY PREVENTION
1Stationary 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, before the guards are
securely reinstalled.
2Do 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.
3Noise, 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 occasional visitors shall wear ear
protectors,
above 105 dB(A): special ear protectors that 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.
4Insulation or safety guards of parts the temperature of which can be in excess of 80
°C (175 °F) and which may be accidentally touched by personnel shall not be
removed before the parts have cooled to room temperature.
5When 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.
6If the working process produces fumes, dust or vibration hazards, etc., take the
necessary steps to eliminate the risk of personnel injury.
7Before lifting machines, all loose parts which could be liable to fall down shall be
removed or secured; pivoting parts such as doors, towbars, etc. shall be safely
immobilized.
8To lift heavy parts, a hoist of ample capacity, tested and approved according to local
safety regulations, shall be used.
9When lifting machinery or parts with one or more lifting eyes, 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 30¡ 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 safety 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.

2. LEADING PARTICULARS
2.1 DESCRIPTION OF SAFETY PICTOGRAMS USED IN THIS
MANUAL
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 XA(S)175 Dd
(adjustable towbar with brakes is option)
2.2 GENERAL DESCRIPTION
The XA175 Dd, as well as the silenced version XAS175 Dd is a
portable, single-stage, oil-injected screw compressor, built for
a normal effective working pressure of 7 bar.
– Engine
The compressor is driven by an air/oil-cooled KHD diesel
engine.
– Compressor
The compressor casing houses two screw-type rotors,
mounted on ball and roller bearings. The female rotor, driven
by the engine, drives the male 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. 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 unloader and
engine speed regulator, matches the air output to the air
consumption. The air receiver pressure is maintained between
the pre-selected working pressure and the corresponding
unloading pressure.
– Cooling system
The compressor is provided with an oil cooler.
The cooling air is generated by a fan, driven by the
compressor element.
– 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 a low oil pressure shut-down
switch and/or a temperature shut-down switch.
– Frame and axle
The compressor/engine unit is supported by rubber buffers in
the frame.
The standard XA(S)175 Dd has a non-adjustable towbar with a
towing eye and an overrun and parking brake.
As an option the unit can be equipped with an adjustable
towbar and a ball coupling type DIN, ITA, NATO or GB.
– Bodywork
The bodywork has openings at the shaped front and rear end
for the intake and outlet of cooling air, hinged side doors for
maintenance and service operations. The XAS175 Dd
bodywork is internally lined with sound-absorbing material.
– Lifting eye
A lifting eye is accessible when a small door at the top of the
unit is unlocked.
– Control panel
The control panel grouping the air pressure gauge, control
switch etc., is placed behind a small transparent panel at the
right hand/ rear end.
– Data plate
The compressor is furnished with a data plate showing the
serial number, maximum final pressure and normal working
pressure (See chapter 9).
INSTRUCTION MANUAL
9
5
7
100
L
WA
1
S
A
X
☞

XA(S)175 Dd
10
Runlamp.
Compressor loaded.
Prohibition to open air valves without connected
hoses.
Airfilter.
Compressor temperature too high.
Rotation direction.
Inlet.
Outlet.
Compressor oil drain.
Read the instruction manual before starting.
24h
Service every 24 hours.
Warning !
Part under pressure.
Do not stand on outlet valves.
Compressor outlet pressure.
Dangerous exhaust.
Hours, time.
2.3 MARKINGS AND INFORMATION LABELS
Lifting permitted.
diesel
Use diesel fuel only.
Sound power level in accordance with
Directive 84/533/EC (expressed in dB (A)).
Horizontal towbar position required in case
of coupling.
Start-Stop indication of switch.
Do not run the motor with open doors.
Danger, heat flat.
Electrocution hazard.
PAROIL M
Atlas Copco compressor oil.
Read manual.
Read the instruction manual
before working on the battery.
Atlas Copco engine oil.
SAE 15W40
PAROIL
Tyre pressure.
4 bar / 59 psi
Battery.
Pushbutton.
Engine preheat.
Engine start switch.
Oil pressure engine.
Circuit breaker.

INSTRUCTION MANUAL
11
2.4 MAIN PARTS
100
L
WA
70 90 110
°C
S5
A
X7
1
TG
AF
RV CP
TB
FU
FF
SR
FT
CEUV
AV
F
OLG
AR
FP
VI
SV
MV
EP E
OCc
OFc
OFe
FC2
DSe
FC1
ML
AF Air filter (for engine and compressor)
AR Air receiver
AV Air outlet valves
CE Compressor element
CP Control panel
DSe Engine oil level dipstick
E Engine
EP Exhaust pipe
F Fan
FC1 Filler cap, engine oil
FC2 Filler cap, fuel tank
FF Fuel filter
FP Filler plug, compressor oil
FT Fuel tank
FU Fuel pump
ML Manual stop lever
MV Minimum pressure valve
OCc Oil cooler compressor
OFc Oil filter, compressor
OFe Oil filter, engine
OLG Oil level gauge
RV Regulating valve
SR Speed regulator
SV Safety valve
TB Towbar
TG Air outlet temperature gauge
UV Unloader valve
VI Vacuum indicator
Fig.2.2 Main parts of XA(S)175 Dd (adjustable towbar, brakes and roadsignalisation are options)

XA(S)175 Dd
12
Fig. 2.3 Speed regulating and unloading system
OCc
DETAIL
4
AV
RV
6
7
8
CE
OFc
BDV
Max.Min.
TV
VIAF
SV
AR
OS
OLG
FP
DP1
DP4
TG DP3 DP2
SEE DETAIL
OV
CV
F
E OCe
FR
VV
PG
LV
BV
UV
123
SR
SL
MV
S PEED REGULATING AND UNLOADING SYSTEM
AF Air filter (for engine and
compressor)
AR Air receiver
AV Air outlet valves
BDV Blow-down valve
BV Bleeder valve
CE Compressor element
CV Check valve
DP1 Drain plug, oil tank
DP2 Drain plug, oil stop valve
DP3 Drain plug, check valve
DP4 Drain plug, oil cooler
E Engine
F Fan
FP Filler plug, compressor oil
FR Flow restrictor, oil scavenging line
LV Loading valve
MV Minimum pressure valve
OCc Oil cooler compressor
OCe Oil cooler engine
OFc Oil filter, compressor
OLG Oil level gauge
OS Oil separator element
OV Oil stop valve
PG Working pressure gauge
RV Regulating valve
SL Scavenge line
SR Speed regulator
SV Safety valve
TG Air/oil temperature gauge
TV Throttle valve
UV Unloader valve
VI Vacuum indicator
VV Venting valve
1. Check nut, ball joint
2. Ball-and-socket joint
3. Piston rod
4. Piston
5. Engine speed control lever
6. Adjusting wheel, working pressure
7. Check-nut, adjusting wheel
8. Spring

2.5 AIR FLOW (SEE FIG. 2.3)
The system comprises:
AF Air filter
AR/OS Air receiver/oil separator
CE Compressor element
UV Unloader valve
BDV Blow-down valve
Air drawn through the airfilter (AF) into the compressor
element is compressed. At the element outlet, compressed air
and oil pass into the air receiver/oil separator (AR/OS).
The check valve prevents blow-back of compressed air when
the compressor is stopped. In the air receiver/oil separator
(AR/OS), most of the oil is removed from the air/oil mixture; the
remaining oil is removed by the separator element.
The oil collects in the receiver and on the bottom of the
separator element.
The air leaves the receiver via the minimum pressure valve
(MV), which prevents the receiver pressure from dropping
below the minimum working pressure (see section 8), even
when the air outlet valves are open. This ensures adequate oil
injection and prevents oil consumption. On units with an
aftercooler, the compressed air is discharged through the
outlet valve(s) via the aftercooler, where the air is cooled down
to approx. 25 °C above the ambient temperature and water
separator. When the unit is stopped, the non-return valve of
the minimum pressure valve (MV) prevents blow-back and the
blow-down valve (BDV) depressurises the air receiver (AR).
A temperature gauge (TG) and a working pressure gauge
(PG) are comprised in the system.
2.6 OIL SYSTEM (SEE FIG. 2.3)
The system comprises:
AR/OS Air receiver/oil separator
OC Oil cooler
OF Oil filter
The lower part of the air receiver (AR) serves as oil tank.
Air pressure forces the oil from the air receiver/oil separator
(AR/OS) through the oil cooler (OC) and oil filter (OF) to the
compressor element (CE).
The compressor element has an oil gallery in the bottom of its
casing. The oil for rotor lubrication, cooling and sealing is
injected through holes in the gallery.
Lubrication of the bearings is ensured by oil injected into the
bearing housings.
The injected oil, mixed with the compressed air, leaves the
compressor element and re-enters the air receiver, where it is
separated from the air as described in section 2.5. The oil that
collects in the bottom of the oil separator element is returned
to the system through scavenging line (SL), which is provided
with a flow restrictor (FR).
The oil filter by-pass valve opens when the pressure drop over
the filter is above normal because of a clogged filter. The oil
then by-passes the filter without being filtered. For this reason,
the oil filter must be replaced at regular intervals (see section
4.2).
2.7 SPEED REGULATING AND UNLOADING SYSTEM
(SEE FIG. 2.3)
The system comprises:
RV Regulating valve
UV Unloader valve
SR Speed regulator
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 unloader valve (UV), matches the air output to the air
consumption. The air receiver pressure is maintained between
the pre-selected working pressure and the corresponding
unloading pressure.
The air output is controlled from maximum output (100%) to no
output (0%) by:
1. Speed control of the engine between maximum load speed
and unloading speed (the output of a screw compressor is
proportional to the rotating speed).
2. Air inlet throttling.
If the air consumption is equal to or exceeds the maximum air
output, the engine speed is held at maximum load speed and
the throttle valve (TV) is fully open.
If the air consumption is less than the maximum air output, the
regulating valve (RV) supplies control air to speed regulator
(SR) and unloader valve (UV) to reduce the air output and
holds air receiver pressure between the normal working
pressure and the corresponding unloading pressure of
approx. 1.5 bar above the normal working pressure.
When the air consumption is resumed, the throttle valve (TV)
gradually opens the air intake and the speed regulator (SR)
increases the engine speed.
The construction of the regulating valve (RV) is such that any
increase (decrease) of the air receiver pressure above the
pre-set valve opening pressure results in a proportional
increase (decrease) of the control pressure to the throttle
valve (TV).
Part of the control air is vented to atmosphere, and any
condensate discharged, through the venting valve (VV).
INSTRUCTION MANUAL
13

2.8 ELECTRICAL SYSTEM
2.8.1 CIRCUIT DIAGRAM
The compressor is equipped with a negative earthed system.
XA(S)175 Dd
14
G1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
D-
B+
D+
K6 K8
K0 Y1 K1
S7
S5
S14
P1
G
+
h
P3
M
G2 +
–
H1
S15
F1 S1
12V DC
X1:1
X1:2
85
86
X1:8
B 6 G
X1:6
W5) 5)
85
86
K6
S2
K1 30
87a87
K0
30
87a87
X1:3 X1:4 X1:5 X1:7
C1 5) K8 H6
30
87a
85
86
+
P
14 14 17 _ 19 18 18
B6 Engine fuel level sensor/shut-down switch
C1 Suppressor
F1 Circuit breaker (10A)
G1 Alternator
G2 Batteries
H1 Alternator charging indicator lamp
H6 Alarm lamp, shut-down switches
K0 Starter solenoid
K1 Shut-down relay, compressor temperature and engine oil
pressure
K6 Starter motor protection relay
K8 Shut-down relay, engine temperature, V-belt protection
and fuel level
M1 Starter motor
P1 Fuel level gauge
P3 Hour meter
S1 ON-OFF switch
S2 Override/start switch
S5 Engine oil pressure shut-down switch
S7 Compressor temperature shut-down switch
S14 Engine temperature shut-down switch
S15 V-belt protection shut-down switch
V1 Diode
X1 Plug
Y1 Engine stop solenoid
Fig. 2.4 Circuit diagram (Nr. 2920 1184 00)

INSTRUCTION MANUAL
15
2.8.2 DESCRIPTION
Operation of the electric circuit
1. Closing ON/OFF switch (S1) supplies voltage to:
– charging indicator lamp (H1), which lights up
– fuel level gauge (P1)
– relay (K6), which makes contact (30-87), closing the line
between switch (S2) and starter solenoid (K0)
– alarm lamp (H6), which lights up.
2. Depressing override/start switch (S2) supplies voltage to:
– engine stop solenoid (Y1) and hour meter (P3), which
respectively open the engine fuel supply and start
counting
– starter solenoid (K0) via relay (K6) contact (30-87).
Solenoid (K0) engages the starter motor (M1), which
cranks the engine.
3. When alternator (G1) starts charging, its built-in voltage
regulator de-energises relay (K6) and extinguishes lamp
(H1).
Relay (K6) makes contact (30-87a), opening the line to
solenoid (K0), the contact of which opens and disengages
starter motor (M1).
4. After the engine oil pressure has built up sufficiently,
engine oil pressure switch (S5) closes its contact,
energising relay (K1).
Relay (K1) makes contact (30-87). Lamp (H6) goes out.
5. Releasing override/start switch (S2) interrupts overriding of
the shut-down circuit. Solenoid (Y1), hourmeter (P3) and
relay (K1) remain energised over relay (K1) contact (30-87)
and over relay (K6) contact (30-87a).
Engine safety shut-down
1. If engine oil pressure shut-down switch (S5) or compressor
temperature shut-down switch (S7) opens, relay (K1) will
be de-energised, breaking contact (30-87) and making
contact (30-87a).
The engine stop solenoid (Y1) is released, the engine
stops and alarm lamp (H6) lights up.
2. The same happens in the event engine temperature switch
(S14), V-belt failure switch (S15) or fuel level switch (B6)
closes, but in this case relay (K8) is energised and its
contact (30-87a) breaks the circuit to relay (K1).
3. Circuit breaker (F1) will cut out if an overload occurs in the
engine stop solenoid circuit or in case of short circuit. It
can be reset after a short period of cooling off by pressing
its push button.

XA(S)175 Dd
16
3. OPERATING INSTRUCTIONS
3.1 PARKING, TOWING AND LIFTING INSTRUCTIONS
Safety precautions
The operator is expected to apply all relevant
safety precautions, including those mentioned on
the inside of the cover of this book.
Attention:
– Before putting the compressor in to use, check the brake
system as described in section 5.6.
– After the first 100 km travel:
– Check and retighten the wheel nuts and towbar bolts to
the specified torque. See section 8.1.
– Check the brake adjustment. See section 5.6.
3.1.1 PARKING INSTRUCTIONS
Fig. 3.1 Non-adjustable towbar without brakes
Fig. 3.2 Adjustable towbar with brakes
When parking a compressor, secure nose wheel (1) to support
the compressor in a level position. Apply parking brake (2).
Place the compressor as level as possible; however, it can be
operated temporarily in an out-of-level position not exceeding
15°. If the compressor is parked on sloping ground,
immobilize the compressor by placing wheel chocks in front of
or behind the wheels. Locate the compressor upwind, away
from contaminated wind-streams and walls. Avoid
recirculation of exhaust air from the engine. This causes
overheating and engine power decrease.
3.1.2 TOWING INSTRUCTIONS
Fig. 3.3 Label on towbar, towing instructions
Before towing the compressor, make sure that the
towing equipment of the vehicle matches the
towing eye or ball connector.
For non-adjustable - and adjustable towbar the towbar should
be as level as possible and the compressor and towing eye
end in a level position. Turn the locking handles in such a way
that there is no clearance between the teeth of the joints; this
can be checked by trying to move the towbar up and down at
the towing eye. Mount safety pins (3). Push hand brake lever
(2) downwards and connect breakaway cable (4) to the
vehicle. Secure nose wheel (1) in the highest position so that
the nose wheel is prevented from turning.
1
4 3
21

INSTRUCTION MANUAL
17
3.1.3 LIFTING INSTRUCTIONS
Fig. 3.4 Lifting eye
When lifting the compressor, the hoist has to be placed in
such a way that the compressor, which must be placed level,
will be lifted vertically.
Preferably use the lifting eye (1).
Lifting acceleration and retardation must be kept
within safe limits (max. 2xg).
Helicopter lifting is not allowed.
3.2 BEFORE STARTING
If the compressor is to be connected to a common
compressed air system, fit an appropiate check
valve between compressor outlet and air system.
Observe the right mounting position/direction!
1. Before initial start-up, prepare battery for operation if not
already done. See section 4.7.
2. With the compressor standing level, check the level of the
engine oil. Add oil, if necessary, to the upper mark on
dipstick. Consult the Engine Operation Manual for the type
and viscosity grade of the engine oil.
3. Check the level of the compressor oil. The pointer of oil
level gauge (OLG- Fig. 2.3) should register in the green
range. Add oil if necessary. See section 4.3 for the oil to be
used.
Before removing oil filler plug (FP - Fig. 2.3),
ensure that the pressure is released by opening an
air outlet valve.
4. Check that the fuel tank contains sufficient fuel. Top up, if
necessary. Consult the Engine Operation Manual for the
type of fuel.
5. Drain any water and sediment from the fuel filter (FF) until
clean fuel flows from the drain cock.
6. Empty the dust trap of the air filter(s) (AF).
7. Check the air filter vacuum indicator(s) (VI- Fig. 2.3).
If the yellow piston reaches the red marked service range,
service or replace the filter element.
Reset the indicator by pushing the reset button.
8. Open an air outlet valve to allow air flow to the atmosphere.
1

XA(S)175 Dd
18
3.3 STARTING/STOPPING
Fig. 3.5 Control panel
F1 Circuit breaker
H1 Alternator charging indicator lamp
H6 Alarm lamp, shut-down switches
LV Loading valve
P1 Fuel level gauge
P3 Hour meter
PG Working pressure gauge
S1 ON-OFF switch
S2 Override/start switch
S4 Loading switch
To start the compressor:
1 Move ON/OFF switch (S1) to ”I” and check that alternator
charging indicator lamp (H1) and alarm lamp (H6) are
alight.
2 Press and keep override/start switch (S2) depressed to
override the shut-down circuit and to engage the starter
motor.
3 Alternator charging indicator lamp (H1) and alarm lamp
(H6) go out within approx. 10 seconds after starting,
depending on the operating conditions. Release
override/start switch (S2) as soon as both lamps (H1 and
H6) are out.
If alarm lamp (H6) does not go out within 10 seconds from
starting, stop the engine at once and inspect its lubricating
system.
Wait a few minutes between each starting attempt.
If the engine fails to start three times, consult the Engine
Operation Manual to localise the cause and remedy.
For starting in extremely cold conditions, consult the
Engine Operation Manual.
4 Run the engine a few minutes at no-load to warm up.
During this period, check the pressure on gauge (PG).
5 When the engine is running smoothly, press loading valve
(LV) or loading switch (S4) and release as soon as
pressure starts building up.
6 When the unloading pressure shows on gauge (PG), the
unloader has unloaded the compressor.
7 Open the air outlet valve(s) (AV).
To stop the compressor:
1 Close the air outlet valve(s) (AV) and run the compressor
unloaded for some minutes.
2 Move ON/OFF switch (S1) to ”0”.
3 Fill the fuel tank at the end of each day’s operation. This
prevents moisture from condensing on the inside of the
tank and contaminating the fuel with water.
If necessary, the compressor can be stopped by
operating the engine’s manual stop lever (ML).
H6
LV/S4
P3 F1 P1
60
50
40 20
30
10
01/2 1/1
0
2
4
68
16
14
12
10
bar
x 100 kPa
VDO
PG
H1
S1
S2

INSTRUCTION MANUAL
19
Fault situations and protective devices:
– The starter motor is protected against prolonged starting or
against attempts to start when the group is already
running.
– A fault which occurs with the engine, either: oil pressure
(too low) or alternator voltage (too low) will always and
immediately cause the engine to cut out and the control
lamp (H6) will light up. By doing some simple checks, it
can be determined what it was that caused the engine to
fail: low oil level, clogged-up cooler, slack alternator belt
tension or broken belt .
– When the outlet temperature of the element becomes too
high, a thermocontact will also switch off the group
immediately. Alarm lamp (H6) will go on.
Both control lamps will remain on until the group has been
restarted or the contact is turned off; also when, due to
cooling off, the thermocontact has closed again.
3.4 DURING OPERATION
The doors must be closed during operation and
may be opened for short periods only.
Regularly carry out following checks:
1 That regulating valve (RV) is correctly adjusted, i.e. starts
decreasing the engine speed when reaching the preset
working pressure in the receiver.
2 The air outlet temperature (TG- Fig. 3.6) of the compressor
element.
3 Check the air filter vacuum indicator(s) (VI- Fig. 2.3). If the
yellow piston reaches the red marked service range,
service or replace the filter element. Reset the indicator by
pushing the reset button.
4 On compressors with aftercooler, check that the automatic
drain of the water separator is operative without air
leakage.
Fig. 3.6 Air outlet temperature gauge (TG)
(View with opened righthand door)
60
50
40 20
30
10
01/2 1/1
°C
70
90
110
0
2
4
68
16
14
12
10
bar
x 100 kPa
VDO
TG

XA(S)175 Dd
20
4. MAINTENANCE
4.1 USE OF SERVICE PAKS
Service Paks include all genuine parts needed for normal
maintenance of both compressor and engine.
Service Paks minimise downtime and keep your maintenance
budget low.
Order Service Paks at your local Atlas Copco dealer.
4.2 PREVENTIVE MAINTENANCE SCHEDULE FOR THE
COMPRESSOR
The schedule contains a summary of the maintenance
instructions. Read the respective section before taking
maintenance measures.
When servicing, replace all disengaged packings, e.g.
gaskets, O-rings, washers.
For engine maintenance refer to Engine Operation Manual.
The maintenance schedule has to be seen as a guideline for
units operating in a duty environment typical to compressor
applications. Maintenance schedule can be adapted
depending on application environment and quality of
maintenance.
MAINTENANCE SCHEDULE Daily Normal Yearly Remarks
or every 500 hours or every 1000 hours
SERVICE PAK 2905 0576 02 2905 0576 03
Engine oil level Check
Compressor oil level Check
Air filter dust trap Empty
Fuel filter water drain Drain
Air intake vacuum indicator Check Test
Electrolyte level and terminals of battery Check Check
Tyre pressure Check Check
Leaks in air-, oil- or fuel system Check Check
Oil cooler package Clean Clean
Engine minimum and maximum speeds Check Check
Torque of wheel bolts Check Check
Brake system (if installed) Check/Adjust Check/Adjust
Safety valve Test
Door Hinges Grease Grease
Towing eye shaft or ball coupling and its shaft Grease Grease
Shut-down switches Check
Pressure drop over separator element (2) Measure Replace
Fan v-belt (3) Adjust Adjust
Fueltank Clean Clean
Compressor oil Change
Compressor oil filter Replace
Air filter element (1) Check Replace
Engine oil (3) (4) Change Change
Engine oil filter (3) Replace Replace
Fuel filter (3) Replace Replace
Engine inlet and outlet valves (3) Adjust first adjustment
Oil flow restrictor Clean Clean
Aftercooler water separator (if installed) Clean Clean
Ball joints and pivots (solenoid/speed regelation) Grease Grease
Wheel bearings Grease
Operating of regulating valve,
speed regulator, unloader Check
Inspection by Atlas Copco
Service technician
(1) More frequently when operating in a dusty environment.
(2) Replace the element when the pressure drop exceeds 0.8 bar.
(3) Refer to the KHD Deutz Engine Operation manual.
(4) 500 hours only valid when using PAROIL SAE 15 W 40.
Keep the bolts of the housing, the lifting eye, the towbar and the axle securely tightened.
Refer to ‘Technical specifications’ for the torque valves.