Avantco A35409 User manual

Hydraulic Compressor 2013 1
Avant Tecno Oy 2013 Copyright all rights reserved
Please read this manual carefully before using the equipment, and follow
all instructions.
Keep this manual for later reference.
Operator’s
Operator’sOperator’s
Operator’s
manual for Attachment
manual for Attachmentmanual for Attachment
manual for Attachment
H
Hy yd dr ra au ul li ic c C Co om mp pr re es ss so or r
Product number: for 300-700 –series loaders, front mount: A35409
for 400-700 –series loaders, rear mount: A35456

Hydraulic Compressor 2013 1
Avant Tecno Oy 2013 Copyright all rights reserved
Dimensions, compressor, front mount A35409:
Dimensions, compressor, rear mount A35456:

Hydraulic Compressor 2013 1
Avant Tecno Oy 2013 Copyright all rights reserved
CONTENTS
1. Foreword...............................................................................................................................4
2. Designed purpose of use ......................................................................................................5
3. Safety instructions for using the compressor.........................................................................6
4. Technical specifications ........................................................................................................9
4.1. Operating conditions...................................................................................................................... 9
4.2. Speed control system and automatic stopping (PNE)................................................................... 10
4.3. Safety relief valve........................................................................................................................ 11
4.4. Warning labels ............................................................................................................................ 12
4.5. Main components of the compressor ........................................................................................... 13
5. Assembly of compressor.....................................................................................................14
5.1. Mounting the compressor to the loader boom .............................................................................. 14
5.2. Connecting and disconnecting hydraulic fittings........................................................................... 15
5.3. Uncoupling and storage of the compressor.................................................................................. 16
5.4. Installing the rear mount frame.................................................................................................... 17
6. Instructions for use..............................................................................................................18
6.1. Checks before use ...................................................................................................................... 18
6.2. Starting the compressor............................................................................................................... 18
6.3. Stopping the compressor............................................................................................................. 19
6.4. Draining air reservoir and storage of compressor......................................................................... 19
7. Inspections, maintenance and service.................................................................................20
7.1. Checking hydraulic and pneumatic components .......................................................................... 20
7.2. Checking the compressor and regular maintenance..................................................................... 21
7.2.1.Compressor air filter................................................................................................................ 21
7.3. Cleaning...................................................................................................................................... 22
7.4. Oils............................................................................................................................................. 22
7.5. Removal from service.................................................................................................................. 22
7.6. Troubleshooting .......................................................................................................................... 23
Appendix: Original manual for Dynaset HK400/8-23 compressor unit, including EC Declaration of Conformity
The complete manual for the compressor
consists of two parts. The original manual of the
compressor unit is supplied with this manual.
Make sure that also the original manual of the
compressor is also available, cover page shown
in adjacent picture.

4(24)
1. Foreword
Avant Tecno Oy would like to thank you for your purchase of this attachment for your Avant loader. The
attachment has been designed and manufactured for easy and productive operation with Avant loaders. By
familiarising yourself with this manual and following the instructions, you ascertain your safety and ensure
the reliable operation and long service life of the equipment. Read the instructions carefully before starting to
use the equipment or performing maintenance. The purpose of this manual is to help you to:
■operate the equipment in a safe and efficient manner
■observe and prevent any hazardous situations
■keep the equipment intact and ensure a long service life
The following warning symbols are used throughout this manual to indicate factors that must be taken into
account to reduce the risk of personal injury or damage to property:
This notice symbol indicates information about the correct operation and
maintenance of the equipment.
Failure to observe the instructions accompanying the symbol can lead to
equipment breakdown or other property damage.
With these instructions, even an inexperienced user can use the attachment and loader safely. The manual
includes important instructions for experienced AVANT operators as well. Ensure that all persons using the
loader have received proper guidance and familiarised themselves with the manual of the loader, this
operator’s manual, the original manual for the attachment, and all safety instructions before using the
equipment. Using the equipment for other purposes or use in any other way than described in this manual is
prohibited. Keep this manual at hand throughout the service life of the equipment. If you sell or transfer the
equipment, be sure to hand over this manual to the new owner. If the manual is lost or damaged, you can
request a new one from the retailer or manufacturer. Due to continuous product development some details
shown in this manual may differ from your equipment.
In addition to the safety instructions included in this manual, you must observe all occupational safety
regulations, local laws and other regulations concerning the use of the equipment. Particularly the
regulations concerning the use of the equipment on public road areas must be observed. We reserve the
right to change the contents of the manual without notification. This operator’s manual is original English
version.
In addition to this operator’s manual, the original manual of the compressor unit must
be observed also. In unclear or conflicting points the original manual must be followed.
This annex covers attaching and using the machine particularly with Avant loaders.
WARNING:
This safety symbol refers to important safety information in this manual. It
warns of an immediate hazard that could cause serious personal injury or
property damage.
Read the warning text accompanying the symbol carefully and ensure that
other operators are also familiar with the warnings, since personal safety is at
stake.
NOTICE

5(24)
2. Designed purpose of use
The hydraulically operated air compressor is intended for use with Avant 300-700 series multi purpose
loaders as an easy to use and transportable attachment. Compatible loader models are shown in Table 1
below. The strong and robust compressor makes use of the auxiliary hydraulics oil flow of the loader, making
it possible to have high output of compressed air easily near work site even in difficult conditions. The
compressor can be used with all typical pneumatic equipment requiring compressed air, such as different
hand tools, painting work, construction work, or filling tyres, if the tool or device is compatible with the 8 bar
pressure produced by the compressor. If needed, the compressor can be connected to a larger system to
provide temporarily compressed as a back-up compressor.
The operating speed of the compressor depends on the loader engine rpm and hydraulic oil output, and in
addition, the compressor is equipped with a hydraulic operating speed compensator to reduce the maximum
operating speed of the compressor. The compressed air reservoir is integrated to the frame of the
compressor and it is equipped with a standard type quick fitting to connect equipment. A pneumatic valve will
stop the compressor and set the hydraulic flow to free circulation when the pressure in the reservoir reaches
operating pressure. Connecting the compressor block directly to other systems by bypassing the integrated
reservoir is prohibited. Depending on the compressor model, it can be attached to the front quick coupling of
the loader, or it can fitted to the back of the loader with mounting bracket, leaving the boom available for
another attachment. When using the compressor, it must be attached and locked to the loader. The
compressor is intended to produce compressed air, other gas types are not allowed.
The attachments have been designed to require as little maintenance as possible. The operator can perform
regular maintenance tasks. However, all repair work can’t be performed by the operator, and demanding
repair and maintenance operations must be left for professional service technicians. All maintenance work
must be done using proper safety equipment. Spare parts must be identical with original specifications,
which can be ensured by using only original spare parts.
Familiarise yourself with the manual's instructions regarding service and maintenance. Please contact your
AVANT or Dynaset retailer if you have additional questions about the operation or maintenance of the
equipment, or if you require spare parts or maintenance services.
Model 216
218
220
313S
320S
320S+
419
420 520 528 525LPG R28
R35
630
635
640
745
750
Front mount
A35409
- •
••
• •
••
• •
••
• •
••
• •
••
• •
••
•
Rear mount with
bracket
A35456
- - •
••
• •
••
• - •
••
• •
••
•
When fitting the compressor to the back of the loader, the loader must be equipped with double acting rear
auxiliary hydraulics. In this case, the rear side weights can’t be used.
Table 1 – Compatibility of compressor mo els A35409 an A35456 with Avant loa ers

6(24)
3. Safety instructions for using the compressor
Please bear in mind that safety is the result of several factors. The loader-attachment combination is highly
powerful, and improper or careless use may cause serious personal injury or property damage. Due to this,
you should carefully familiarise yourself with the manuals of both the loader and the attachment before
starting operation. Do not use the attachment if you have not familiarised yourself with its operation and the
related hazards.
Misuse, careless use, or using an attachment that is in bad condition may cause
serious injuries. Familiarise yourself with the controls of the loader and safe coupling
and operation of the attachment at a safe area. Become familiar especially with how to
stop the equipment in a safe manner.
Read all safety instructions carefully before handling the attachment
•The compressor can be used only when it is attached and locked to the loader.
When mounting the compressor to the back of the loader, the rear mounting kit
and correctly installed rear auxiliary hydraulics outlet must be used.
•When attaching the attachment to the loader, ensure that the locking pins of
the loader's quick attach plate are positively in the lower position and that
they have locked the attachment to the loader. When using the rear mounting
bracket, make sure that the bracket is locked to upright position.
•The compressor is to be used by one operator at a time. Prevent others from
operating the controls of the loader when compressor is in use. The attachment is
intended for adult operators only.
•Ensure that the loader will stay firmly still when leaving the driver’s seat, even if
the loader is parked on an even surface. The loader could crawl due to vibration
or fault in drive circuit resulting in hazard of being run over by moving loader.
Always engage the parking brake and use chocks as needed.
•A running loader must not be left unmonitored for long periods. Shut down the
loader engine and turn off the auxiliary hydraulics if compressed air is not
needed. The temperatures of the loader and attachment must be monitored and
overheating must be prevented.
•The exhaust gas of the loader may contain significant amounts of carbon
monoxide (CO) and particulate matter (soot), and is hazardous in poorly
ventilated areas. The use of diesel or gasoline powered loaders indoors (i.e.
garages, storage buildings, construction sites) can be fatal and using such
machines indoors is prohibited unless special precautions have been made to
remove the exhaust of the loader. Using a loader powered with LPG in poorly
ventilated areas can also be fatal because of the possibility of carbon monoxide
emissions.
•Never leave the driver’s seat when the attachment is lifted high off the ground, to
height of over one metre. Always lower the compressor near the ground before
leaving the driver’s seat. Make sure that the attachment is properly supported
during maintenance or inspections. Going under a raised attachment or loader
boom is dangerous, as the boom may lower due to loss of stability, mechanical
fault or by other person operating the controls of the loader.
•When cleaning, checking or servicing the compressor, the hydraulic pressure and
the compressed air must be relieved as their uncontrolled discharge can cause
injuries. Follow the safe stopping procedure.

7(24)
•Running compressor will get hot quickly and touching the surfaces of the
compressor can cause burns. Keep clear of hot surfaces and make sure that the
cooling surfaces of the compressor are clean. The attachment must be kept clean
for efficient cooling and to avoid collecting of combustible dust on the
compressor. Keep the compressor away from walls or other obstacles that could
have an adverse effect on the operation of the cooling system. Keep the loader
and the compressor away from easily ignited materials or dust. Also, make sure
that the hydraulic oil cooler of the loader is in good condition and clean. In case
the hydraulic oil overheats, the compressor must be stopped and the system
must be allowed to cool before restart.
•Never modify the attachment in a way that could affect its safety. The set
pressure level must not be exceeded. Only authorised service representative can
change the settings of the compressor. Modifying, tampering with, or changing
the air pressure safety relief valve to any other type than original spare part may
cause risk of bursting of compressed air reservoir and destruction of the
compressor unit. The condition and operation of the pressure relief valve must be
checked regularly and thevalve must be kept clean and in good condition.
•Make sure that you operate only an attachment that is in good condition. For
example, damaged compressed air reservoir, bent tubing or wrongly adjusted
pressure level together with a faulty pressure relief valve can lead to explosion-
like release of compressed air. Never operate the compressor if signs of leaks
have been found on the compressor or any pneumatic tool or hose. Do not
attempt to repair damaged pressure reservoir, contact service if needed.
•Transport and operate the compressor when the loader boom is lowered to its
lowest position and near the loader for the best stability of the loader.
•Operate the controls of the loader only when sitting on the driver’s seat. Wrong
control movement will cause hazard of crushing to any person nearby the loader
outside the driver’s area. Always get on the driver’s seat to start, stop, or to
change the position of the compressor.
•Pay attention to the surroundings and any other persons and machines moving in
the vicinity. Pay attention to the contours of the terrain as well as other hazards,
such as loose rocks, or branches and trees that reach the driver's area.
•Also read the safety instructions of the loader from the operator’s manual of the
loader. Read through the original operator’s manual of the Dynaset compressor
unit as well.
Note that the loader boom moves down and may be tilted even if the engine has been
stopped. Never go under a raised attachment or boom or to the danger area between the
boom and the attachment. Always lower the attachment near ground before leaving the
driver’s seat. Lock the parking brake and make sure that the loader will stay still when
leaving the driver’s seat.
The surfaces of the compressor will get hot quickly. Keep
clear especially from the compressor block and keep the
attachment clean to ensure that the cooling system works
efficiently. Make sure that the air flow around the
compressor is not obstructed.

8(24)
Remember needed safety equipment and to wear proper protective clothing:
•The noise level at the driver's seat and around the machine may exceed 85 dB(A). Wear
hearing protection while working with the loader. Also, working with pneumatic tools can
produce high levels of noise. To lower noise exposure, keep loader rpm at correct level
and use tools that are designed to be as quiet as possible.
•Wear safety boots when working with and around the loader.
•Wear protective gloves.
•When handling hydraulic or pneumatic hoses or components, wear safety goggles. The
use of safety goggles is recommended when working with various types of pneumatic
tools.
Find out about other necessary safety equipment at specific
operating areas. For example, when working at construction
sites, safety helmet is required. In dusty conditions wear
breathing mask.
Safe stopping of the equipment in case of disruption of operation, before maintenance work, or when
preparing the compressor for any storage period
Always stop the compressor following safe stopping procedure before going near the
attachment. Never go under a raised loader boom or the attachment. Note that the
loader boom can move down even if the engine of the loader is turned off. Safe
stopping procedure:
•Stop the attachment and the loader.
•Lower the boom and the attachment on the ground.
•Shut down the loader engine and lock the parking brake.
•Release residual pressure from the hydraulic system.
•Prevent starting of the machine, remove key from ignition.
•Release the compressed air from the reservoir of the compressor (see Chapter 6.4)
and relieve air pressure form the hoses or tools connected to the compressor.

9(24)
4. Technical specifications
Table 2 – Avant hy raulic air compressor specifications
Product number:
A35409 A35456
Weight with mounting frame: 72 kg 66 kg
Compressed air output ISO 1217: 400 l/min
Operating pressure: 8,0 bar
Maximum pressure, safety pressure relief valve
opening: 9,5 bar
Type of air connector: Quick connector BSP R1/2”
Compressor block type: Dynaset HK400/8-23 PNE
Frame reservoir volume: 4,4 l
Maximum hydraulic pressure: 22,5 MPa (225 bar)
Nominal hydraulic oil input flow: 25 l/min
Minimum needed hydraulic oil flow: 12 l/min
Maximum hydraulic oil flow: 40 l/min
Rotating speed control Primary control: loader engine rpm,
compressor is equipped with speed compensator
Hydraulic oil pressure with rated output: 210 bar
Hydraulic oil pressure when running unloaded: 50 bar
Operating temperatures: Standard:
-5ºC … 40ºC
Suitable AVANT loader: See Table 1
Pressure and compression ratio:
The rated absolute intake pressure is 1 bar (100 kPa). The used reference pressure is barometric pressure
at sea level 1,0135 bar, which at an altitude of 100 m from sea level will drop to approximately 0,9 bar. When
operating pressure is 8 bar, the compression ratio will be:
4.1. Operating con itions
Because of the exhaust emissions of any type of loader, the use of compressor is allowed only outdoors or in
areas where special measures have been taken to ventilate exhaust gases. The compressor must not be
used at areas where there is smoke, toxic or flammable fumes, or other impurities in the air.

10(24)
Permissible operating temperature:
With factory oil, the compressor can be use in -5ºC … 40ºC outdoor temperatures. The compressed air
produced by the compressor is 5 to 10ºC warmer than surrounding air. When temperature drops below 0ºC,
the compressed air reservoir must be emptied after each use (see Chapter 6).
When alternative type of compressor oil is used, shown in Chapter 7, the compressor can be used in
conditions according to oil type. According to standard EN 1012-1 the maximum allowed compressor oil
temperature is 100ºC. In normal operating conditions with 20ºC outdoor temperature, the normal compressor
oil temperature is around 80 - 85ºC.
Humidity:
The compressor can be operated with maximum air humidity of 90%, while temperature is within permissible
range. If humidity exceeds 90%, contact service.
4.2. Speed control system and automatic stopping (PNE)
Speed control system
The speed control valve, integrated to the
hydraulic system of the compressor, regulates
the rotating speed of the compressor so that
the maximum input can be exceeded by 10 to
20 l/min as shown in the figure on the left.
This will help to achieve the best performance
of the compressor.
The speed control valve is automatically and
individually functioning component. However,
the nominal rated input should not be
exceeded, and it will not increase the
performance of the compressor, but will
unnecessarily heat up the hydraulic oil. The
system includes a valve that prevents the
compressor from rotating in the wrong
direction.
Connection of spee control
valve within the hy raulic system
Speed control valve
Main Hy raulic an pneumatic
components of the compressor
See detailed descriptions in Dynaset
manual
Operation of the spee control valve, range of rotating
spee control

11(24)
Automatic stopping system
The air pressure in the compressor tank controls the integrated automatic stopping system of the
compressor. When functioning normally, the air pressure gauge will reach set pressure level, and the
compressor will stop. When the stopping system stops the compressor, the air pressure between the
compressor block and tank is vented, making it easier for the compressor to restart. Once the pressure in
tank has dropped about 2-4 bar, the compressor will restart smoothly, delivering uninterrupted flow of
pressurized air.
The system is pre-adjusted and does not include components that are serviceable or adjustable to user.
Check regularly that the components are clean and in good condition. Make sure that air hose shown as
4.15 in figure below is in good condition, to ensure reliable operation of the system. The stopping system
sets the hydraulic circuit to free circulation with valve 4.2, when the pre-set air pressure level is reached in
valve 4.13. More detailed component descriptions can be found from the operator’s manual of the
compressor unit.
4.3. Safety relief valve
The safety relief valve 5.4., shown in figure on previous page, must be an original part in good condition.
Check the condition of the safety relief valve visually for dirt, ice, corrosion, or other possible changes that
may reduce the service life of the valve or obstruct the valve from functioning normally.
The opening of the safety relief valve can be observed as loud noise related to quick release of air, and if the
pressure gauge shows higher pressure than nominal operating pressure. If the safety relief valve is active, or
the pressure reaches higher than operating pressure, stop the use of the compressor immediately and
investigate the cause of high pressure. Contact service. The opening pressure of the safety relief valve must
never be changed.
Components of spee control valve an automatic stopping system

12(24)
4.4. Warning labels
Listed below are the labels and markings, which must be visible on the equipment. Replace the warning
labels, if they have become unclear or if they have detached completely. New labels are available via your
retailer or contact information provided on the cover of this manual.
The warning labels contain important safety information and they help to identify and
remember the hazards related to the equipment. Replace any damaged or missing
warning label with new one.
A46771 A46772 A46803
Only when the
compressor is installed
to the rear of the loader.
Identification plate of the attachment

13(24)
4.5. Main components of the compressor
1 Power Pack front mount frame A35406
2 Compressed air connector
3 Reservoir pressure gauge
4 Frame air reservoir
5 Automatic speed control valve
6 Air filter
7 Oil level sight glass
8 Oil fill port
9 Reservoir drain, manual valve
Decal Warning message
A46771 Read instructions before use.
A46772 Do not go under a raised attachment
or loader boom; stay away from raised
equipment.
Attachment identification plate
10 Power Pack rear mount frame A35546
11 Frame tilt locking
12 Hydraulic hose stand
13 Rear mount frame fitting brackets
14 Rear mount frame screws
Decal Warning message
A46771 Read instructions before use.
A46803 Crushing hazard, moving and locking
frame mechanism. Keep fingers away
from between frame components when
tilting the mounting frame.
Attachment identification plate
Table 4 – Warning labels an locations,
front mounte compressor
Table 3 – Compressor, front mount
Main components A35049
Table 5 – Compressor, rear mount frame
Main components A35456
Table 6 - Warning labels an locations,
front mounte compressor

14(24)
5. Assem ly of compressor
The attachment is ready for use as delivered. The rear mount frame can be installed as shown in Chapter
5.4 to a loader that isn’t fitted with rear side counterweights or rear lift device.
5.1. Mounting the compressor to the loa er boom
Mounting the attachment to the loader boom is quick and easy, but it must be done carefully. An attachment
that has not been locked may come off from the loader and cause hazardous situations. The attachment is
mounted to the loader boom by using the quick attach plate and the counterpart on the attachment. In the
worst case, the attachment may slide onto the driver along a raised boom. For this reason, the attachment
must under no circumstances be raised to a height of over one metre when it has not been locked. To
prevent hazardous situations, always follow the attachment mounting instructions provided in the following
pages. Also remember the safety instructions in Section 3 and the instructions provided in the operator’s
manual of the loader.
Step 1:
•Lift the quick attach plate locking pins up and turn them so that they are
locked in the upper position.
•If your loader is equipped with a hydraulic attachment locking system, see
additional instructions about the use of the locking system from the relevant
manuals.
•Ensure that the hydraulic hoses are not in the way during installation.
Step 2:
•Turn the quick attach plate hydraulically to an obliquely forward position.
•Drive the loader onto the attachment. If your loader is equipped with a
telescopic boom, you can utilise this.
Step 3:
•Turn the boom control lever left to turn the bottom section of the quick attach
plate onto the attachment.
•Lift the boom slightly – pull the boom control lever backward to raise the
attachment slightly off the ground.
•Turn the boom control lever more to the left to engage locking pins, or lock
the hydraulic locking.
•Always make sure that the attachment is fully locked.

15(24)
An attachment that has not been completely locked to the
loader may fall on the boom or operator, or under the
loader while driving, causing serious injuries. Before
moving or lifting the attachment, make sure that the
locking pins are in the lower position and come through the
fasteners on both sides. Never move or lift an attachment
that has not been locked.
Excessive tilting or lifting of an unlocked attachment increases the risk of tipping the
attachment over. Do not use the automatic locking of the locking pins when the
attachment is lifted more than one metre from the ground. If the locking pins do not
return to the normal position when tilting, do not tilt or raise the attachment any more.
Lower the attachment on the ground and secure the locking manually.
5.2. Connecting an isconnecting hy raulic fittings
The default hydraulic connector for front mount compressor is the multiconnector system. If you want to
change the type of the hydraulic couplings of the attachment or the loader, contact your Avant dealer or
service point for instructions or installation services.
Never connect or disconnect quick couplings or other hydraulic components while the
system is under pressure or if the control lever of the auxiliary hydraulics control lever
is locked on. Connecting or disconnecting the hydraulic couplings while the system is
pressurized may lead to unintended movements of the attachment, or ejection of high-
pressure fluid, which can cause serious burns or other injuries.
Keep the fittings as clean as possible; use the protective caps for the quick couplings on both the attachment
and the loader. Dirt, ice, etc. may make using the fittings significantly more difficult. Never leave the hoses
hanging on the ground; place them on top of the equipment.
Connecting the multiconnector system:
Align the pins of the attachment connector with corresponding holes of the
loader connector. The multiconnector will not connect if the attachment
connector is upside down. Connect and lock the multiconnector by turning
the lever towards the loader.
The lever should move easily all the way to its locking position. If the lever
does not slide smoothly, check the alignment and position of the connector
and clean the connectors. Also shut down the loader and release the
residual hydraulic pressure.
To disconnect the multiconnector system, turn off the auxiliary hydraulics of
the loader and unlock the multiconnector. To unlock, push the knob on the
side of the connector, and turn the lever to disconnect.
Align the pins of the
multiconnector system

16(24)
Conventional quick couplings:
■Used always when fitting the compressor behind the loader.
■Alternative couplings for some loader models.
Before connecting or disconnecting the standard quick couplings, the residual pressure must be released as
shown below. The conventional quick couplings will not connect, if there is pressure in the hydraulic system.
To connect and disconnect the standard couplings, move the collar at the
end of the female fitting. The hoses should be connected so that the
fitting equipped with a coloured cap is connected to the corresponding
fitting of the loader. Note that the protective caps on the loader and the
attachment can be fastened to each other during operation to reduce the
accumulation of dirt. When disconnecting the standard quick couplings a
small amount of oil may drip from the couplings. Wear protective gloves
and have some cloth at hand to keep the equipment clean.
Make sure that both quick coupling fittings are properly connected, otherwise
the hydraulic motor of the attachment may get damaged.
Releasing residual hydraulic pressure:
To make sure that there will not be residual pressure in the hydraulic system of the attachment, shut down
the loader engine and move the auxiliary hydraulics control lever of the loader to it’s extreme positions
before disconnecting the couplings. If the fittings will not connect to the loader, the residual pressure must be
released. The residual pressure must be released before handling the rotating components of the
attachment and before storage of the attachment.
5.3. Uncoupling and storage of the compressor
The compressor must be stored in upright position. Avoid storing the attachment directly against the ground,
place a pallet or blocks of wood under it, for example. Protect the compressor from rain. When storing the
compressor, empty the air reservoir and drain all condensed water from it as shown in Chapter 6.4. Also,
read instructions concerning maintenance and service from Chapter 7.
When uncoupling the attachment from the loader, always disconnect the
hydraulic fittings first before unlocking the quick attach plate, to prevent hose
damage and any oil spills. Reinstall the protective caps on the fittings to
prevent dirt from entering the hydraulic system.
Avoid storing the attachment directly on the ground for long periods to avoid
rust damage. Protect compressor from rain. Service the compressor as shown
in chapter 7.
NOTICE
NOTICE
NOTICE
Conventional quick couplings

17(24)
5.4. Installing the rear mount frame
The compressor can be installed to the back of 400-700 series loaders with the rear mount frame delivered
with compressor A35456. The loader must be equipped with double acting rear auxiliary hydraulics to
connect the compressor. The rear mount frame is fitted to the rear counterweight or light rear bumper. Extra
counterweights can’t be used and also the trailer coupling must be removed.
To install the rear mount frame, a suitable lifting device or assisting person is needed, the compressor with
mounting bracket weighs about 66 kg. Install the compressor on flat ground and allow the loader to cool
down first.
1. Check the adjustments of the frame to match the loader.
2. Remove possible extra counterweights from the loader.
3. Clear the threads on the rear counterweight or light bumper in advance.
4. Lift the frame on the counterweight or light bumper.
5. Tighten fitting bolts and make sure the frame is locked upright.
6. Connect hydraulic hoses to rear outlet on the loader. Make sure that the hoses will not abrade
against sharp corners, and make sure that the hoses are not close to the exhaust of the loader or
other hot points.
Height adjustment of the rear mount frame:
The frame is adjusted by removing the pin locking screws (1) and the pins (2) shown in the adjacent figure.
Before installing the frame to the loader, make sure that the bracket is adjusted as follows:
Frame
setting Loader models
A419 420
520
B
528
630
635
640
C745
750
Check also the longitudinal adjustment of the frame. The frame can be adjusted closer to the loader only for
700 series loaders. In other loader models the frame could hit the cabin or seat frame, if not in the rear
setting.
Make sure that the rear mounting frame is locked on the loader. Falling frame creates
hazards of crushing, oil spill and burns. Also, ensure that the frame is locked on both
sides of the frame whenever the loader is in use.

18(24)
6. Instructions for use
When the compressor and its hydraulic hoses are connected to the loader as shown in his manual, the
compressor is ready after initial checks.
When the compressor is needed, leaving the driver’s seat is allowed only when the loader is parked on firm
and level ground so that the moving of the loader is prevented by using suitable means in addition the
parking brake as needed. The loader boom must always be lowered. Other persons must not be allowed to
reach the driver’s seat of a loader that has been left running to operate the compressor, so that the loader
will remain still in safe position while in use. The loader must not be left running for long periods. Things to
monitor include the hydraulic oil and coolant temperatures of the loader.
Unintended moving of the loader or wrong control
movement of the controls cause hazard of crushing. Start or
stop the attachment only when sitting on the driver’s seat,
when the compressor is in upright position close to ground
surface. Always lock the parking brake, turn the articulated
frame straight and ensure that the loader will stay still and
stable before leaving the driver’s seat. Prevent other people
from reaching the controls of the loader.
6.1. Checks before use
■Operate the compressor only when the loader is parked and the boom is lowered.
■Ensure that during use the compressor is in upright position.
■Check the condition of the compressor, leakages, cleanliness, cooling fan, and oil level. See list of
checks in Chapter 7.2 and other instructions regarding maintenance, service and checks in chapter
7.
■Only use tools that are in good condition and make sure that the connected pneumatic systems are
safe. Ensure that the connected tool or system will work with the 8 bar pressure produced by the
compressor.
6.2. Starting the compressor
Start the compressor by turning the auxiliary hydraulics control lever toward its locking position. There are no
adjustable settings on the compressor. Correct operating speed is adjusted by controlling the loader engine
rpm, to set auxiliary hydraulics output of the loader to correct level (23-25 l/min, see operator’s manual of the
loader).
The speed control valve will compensate excess hydraulic oil flow of about 10-20 l/min. However, the
maximum input must not be exceeded and the output flow of the loader must be set as correct as possible. If
the loader is equipped with two auxiliary hydraulic pumps, using both pumps is possible only when the loader
engine rpm is low.
Unnecessarily high engine rpm will heat the hydraulic oil. Set the engine rpm and
auxiliary hydraulics oil output to correct level for compressor.
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Start the compressor only when it’s in upright position to ensure proper oil
circulation within the compressor. If the compressor has been tilted considerably,
allow it to stand upright for a few minutes before starting it. Avoid tilting the
compressor by more than 45 degrees in all situations.
The hydraulic oil cooler of the loader must be kept clean. When working with a
300 series loader without an oil cooler, the compressor can be used only for
limited periods at a time.
During use:
Monitor operation of the compressor and loader during use. Use compressed air as instructed in the manual
of the specific pneumatic tool and use correctly sized hoses to minimise pressure losses. Never direct air jet
towards persons or try to hold leakages with hands; pneumatic air can penetrate skin causing life threatening
condition. The compressed air produced by the compressor must not be used as breathing air in any
application. Blowing air towards clothes causes some materials to burn much more easily, using blowgun to
dry clothes is prohibited.
Do not leave the compressor running unattended. Stability and temperature must be
monitored during use.
Indoors or in poorly ventilated areas the exhaust fumes can reach toxic levels and lead
to suffocation. Operating the loader indoors is prohibited.
6.3. Stopping the compressor
Stop the compressor whenever compressed air is not needed. The compressor must be stopped by turning
the auxiliary hydraulics control lever to its neutral position, or by turning off the loader, if needed. The
compressor must never be turned off by uncoupling its hydraulic hoses. The residual air reservoir can be
emptied as shown in chapter 6.4. It is recommended to release pressure from any hose or tool to prevent
their accidental use. Follow instructions shown in page 8 concerning the safe stopping of the compressor.
6.4. Draining air reservoir an storage of compressor
The air reservoir can be drained by opening the manual
valve pointed in adjacent figure. Open the screw slowly
and gradually with fingers so that air is released in
controlled way. When air has been drained, open the
valve more and, if needed, tilt the compressor to drain all
condensed water from the reservoir. Tighten the valve
using fingers. Do not use tools. Wearing gloves is
recommended.
Especially in humid environment or low temperatures the
reservoir must be drained from condensed water after
each use. The reservoir must be drained before storage.
NOTICE
NOTICE
Manual compresse air tank rain valve

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7. Inspections, maintenance and service
The attachment has been designed to be as maintenance free as possible. Continuous consists of regular
cleaning, checking oil level and keeping the air filter in good condition. In addition, the condition of any
hydraulic or pneumatic component must be monitored.
Ensure that the attachment is properly supported even when it is attached to loader.
All maintenance work must be done after the attachment is lowered down completely
or when rear mount frame is locked upright. The loader boom can lower unexpectedly
causing crushing hazard. Release the residual hydraulic and pneumatic pressures
before maintenance.
The compressor must be kept clean for safety and long and reliable
operation. When performing maintenance or removing components it must
be made sure that dirt will not get into the pneumatic or hydraulic circuits.
7.1. Checking hy raulic an pneumatic components
Check the condition of the hydraulic hoses and components when the engine has been turned off and the
residual pressure has been relieved. Repair all leaks immediately after detecting them; a small leak can
quickly grow into a big one. Do not use the equipment, if you have discovered a leak in the hydraulic system
of the attachment or the loader. Leaking hydraulic fluid may penetrate skin and cause serious injuries. Seek
medical attention immediately in case hydraulic fluid penetrates the skin. Wash any part of body that has
been in contact with hydraulic oil carefully with water and soap. Hydraulic fluid is also harmful to the
environment and any leak to the environment must be prevented. Operate the attachment only with type of
hydraulic oil that is accepted for use in Avant loaders.
Never handle hydraulic components when the
hydraulic system is pressurized, since a fitting
may break or become loose and the released
oil may cause serious injuries. Do not use the
equipment, if you have discovered a fault in the
hydraulic system.
Check hoses visually for cracks or abrasions. Monitor the wearing of the hoses and stop the use, if the
surface layer of any hose has worn off. Check the routing of the hoses. Adjust the hose clamps to avoid
abrasion to the hoses. Hydraulic hoses have limited service life, which is marked on the hoses. After the date
marked on the hoses, they should be replaced with new ones. If there are signs of oil leaks, to check a
component, hold up a piece of cardboard in the area where a leak is suspected.
Finding any of these faults means that the hydraulic hose or component must be replaced. Spare parts are
available from your nearest AVANT retailer or service point. Leave the repair work to professional service
technicians, if you don’t have adequate knowledge and experience about hydraulic assemblies and how to
perform the repairing safely.
NOTICE