AVANT 635i 2025 Operator's Manual

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Operator's Manual

2025-

www.avanttecno.com

A461440 2025 1 EN 2025-

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Summary of Contents for AVANT 635i 2025

Page 1 English Operator's Manual 2025- www.avanttecno.com A461440 2025 1 EN 2025-...
Page 2: Table Of Contents
Avant 635i 640i 2025 1 TABLE OF CONTENTS Lights ..................79 Cabs (option) ................81 INTRODUCTION ............3 OPERATING INSTRUCTIONS ........85 Foreword ................. 3 Starting the loader ..............86 Intended use ................4 Stopping the engine (Safe stopping procedure) ....89 Make sure all relevant manuals are available.....
Page 3: Introduction
Foreword AVANT TECNO OY wants to thank you for purchasing this Avant loader. It is the result of Avant’s long experience in design and manufacturing of compact loaders. We ask you that you read and understand the contents of this Operator's Manual completely before operating the loader.
Page 4: Intended Use
To make sure that the load control system works as intended, the system must be calibrated by Avant service according to the maintenance instructions in this manual. The load control system must also be calibrated whenever counterweights are added or removed.
Page 5: Make Sure All Relevant Manuals Are Available
Always read the Operator's Manual of each attachment carefully. Contact your local Avant dealer for any questions, service, spare parts or about any problems that may occur with the operation of your loader or its attachments.
Page 6: Operator Qualification
Some equipment or options that are shown in this Operator's Manual may not be available. Pictures in this Operator's Manual may show optional equipment. Availability of optional equipment is subject to change. Some options may preclude the installation and use of some other option or options. Check with your Avant dealer for more information.
Page 7: Avant Warranty
Any repairs or modifications performed without the prior authorisation of Avant Tecno Oy will cancel this warranty. During the first two years of operation or first 1000 hours (whichever is the soonest) Avant Tecno Oy warrants to replace any part or repair any defect which may occur, subject to the terms detailed below: The product has received regular maintenance in accordance with schedules given by the manufacturer.
Page 8: Safety First
Safety First Avant 635i 640i Safety First Incorrect or careless use of the loader can cause a serious accident. Before you operate the loader, familiarise yourself with the correct use of the loader. Read and understand this Operator's Manual, as well as all relevant safety instructions, local DANGER regulations, and safe working practices.
Page 9 Avant 635i 640i Safety First Do not exceed the tipping load of the loader. Risk of crushing under boom or Familiarise yourself with the load diagrams and attachment - Stay away from other information in this Operator's Manual. Always remember that the load control system lifted boom and attachment.
Page 10 Safety First Avant 635i 640i Hydraulic pressure - Risk of Risk being crushed serious injury. Hydraulic hoses moving loader - Engage parking and other hydraulic components DANGER brake before leaving the driver's may have trapped pressure to WARNING seat. Follow...
Page 11 Avant 635i 640i Safety First Risk of crushing between tyres - Hazardous areas around the loader Do not turn the steering wheel Make sure that there are no persons in the danger while standing near the loader. CAUTION zone of the loader or the attachment. The safe...
Page 12 Safety First Avant 635i 640i Asphyxiation hazard - Ensure Exposure diesel engine ventilation exhaust cause cancer. Burning diesel fuel produces many potentially cancer-causing Asphyxiation hazard - Ensure WARNING substances that are present in ventilation. Engine exhaust the exhaust of diesel engines.
Page 13: Handling Of Heavy Loads
Avant 635i 640i Safety First Handling of heavy loads Hot exhaust gas Handle heavy loads attachments with care - Risk of Extremely hot exhaust gas and tipping over. exhaust pipe - Never run the WARNING  engine, or park the loader after...
Page 14 Safety First Avant 635i 640i Whenever you handle heavy loads or heavy Risk of overturning - Articulated attachments: frame. Turning articulated frame  Always handle heavy loads only on firm, level can lead to overturning of the WARNING ground while you drive slowly with the loader.
Page 15 Avant 635i 640i Safety First If the warning is triggered by the Load control system: load indicator system: The loader is equipped with a load control system.  The load control system includes a load indicator If loader is driven, bring the WARNING system and load control system.
Page 16: Operation On Uneven Surfaces, Gradients, And Near Excavations
Safety First Avant 635i 640i Operation on uneven surfaces, Risk of tipping over on uneven gradients, and near excavations ground Drive slowly inclined surfaces. Always keep load close to the ground. Keep Uneven ground can cause the WARNING the seat belt always fastened loader to overturn - Risk of while driving the loader.
Page 17: Personal Safety And Protective Equipment
Avant 635i 640i Safety First Whenever you operate the loader on uneven Personal safety and protective ground keep the following in mind: equipment  Handle heavy loads only on even surfaces. Lifting a load or turning on uneven surfaces can...
Page 18 Safety First Avant 635i 640i Safety frame (ROPS) and safety Stay within the space protected by canopy (FOPS) the ROPS safety frame. Always The loader is equipped with a Rolling Over Protective keep seat belt on to stay on WARNING...
Page 19 Any modification to this machine must be approved beforehand by an Voltage level Safety distance, minimum authorised Avant representative. If you modify the loader or attachment, it can become dangerous and 0 - 1000 V cause serious injuries or even death. Unauthorised...
Page 20 Safety First Avant 635i 640i Safety of digging Risk of serious injury or death - Plan all digging work ahead. Accidental or intended contact with DANGER electric cables, pipes, telecommunications cables, water mains, or other structures buried in ground can cause serious injuries fatal.
Page 21: Electric System And Handling Of The Battery
Avant 635i 640i Safety First Electric system and handling of the battery The battery of the 12 V electric system of the loader Lead warning - Wear protective is located under the rear right cover plate. gloves. Battery and its terminals Always handle the battery with care.
Page 22: Fire Prevention
Safety First Avant 635i 640i Fire prevention Battery disconnect switch Clean the loader to avoid build-up of flammable The loader is equipped debris, such as dust, leaves, hay, straw, etc. with battery  There are many parts of the diesel engine that disconnect switch.
Page 23: Description Of The Loader
Write down the serial number and the manufacturing week of your loader and have them ready when you communicate with your dealer or Avant dealer or service partner. The serial number together with the manufacturing week make it possible to identify the...
Page 24 Description of the loader Avant 635i 640i Loader identification plate: Loader identification plate is located near the drive pedals. Contents of the identification plate: Manufacturer's name and address CE mark* Designation of machinery Type code of your loader* Serial number*...
Page 25: Main Parts Of The Loader
Avant 635i 640i Description of the loader Main parts of the loader The following picture shows the main parts of the loader. These general parts are the same regardless of the cab type. 1. Front frame 5. Attachment coupling plate On the front frame are mounted: driver’s seat,...
Page 26: Signs And Decals
Make sure that the following signs and decals are clean, undamaged and readable. If any of these decals is missing or is unreadable stop using the loader until decal has been WARNING replaced. Ask for new decals from your local Avant dealer. Labels on loaders with ROPS canopy Labels on loaders with Cab GT...
Page 27 Avant 635i 640i Description of the loader Table 2 - List of safety labels and markings on the machine Label Location Panel in front of driver's seat Product code A441476 Symbol Safety message WARNING Wrong use, misuse, or careless use can cause hazards that could be prevented with following the instructions properly.
Page 28 Description of the loader Avant 635i 640i Label Follow safe stopping procedure and information regarding maintenance and service. Always remove the ignition key from the loader, and turn the battery disconnect switch to position OFF when leaving the loader unattended.
Page 29 Avant 635i 640i Description of the loader Label Message WARNING Location Read operator's manual and keep it ROPS: On available. manual storage box Store the operator's manual in its place behind seat Cab GT: behind the driver's seat. Rear window...
Page 30 Description of the loader Avant 635i 640i Label Message WARNING Location Risk of tipping over - Drive carefully on Panel near uneven ground. steering wheel The loader may tip over if driving on uneven ground at too high speed or with heavy load.
Page 31 Avant 635i 640i Description of the loader Label Message DANGER Location Risk of death or serious injury - Boom, on both sides Never go under lifted loader boom. Lower boom down before leaving Product code driver's seat. A417273 (2 pcs) Lowering of loader boom can crush, causing death or serious injury.
Page 32 Description of the loader Avant 635i 640i Table 3 - Safety labels in engine compartment Label Message DANGER Location Risk of burns from eruption of hot steam and Engine compartment, boiling water - Never open coolant reservoir on engine coolant when engine is hot.
Page 33 Avant 635i 640i Description of the loader Table 4 - Additional decals on loaders equipped with a cab The following labels are placed to the loader if the loader is equipped with Cab L or Cab GT. Label Message EMERGENCY EXIT Location Use the window hammer to break glass.
Page 34 Description of the loader Avant 635i 640i Table 5 - Information labels Label Message ROPS/FOPS Approval, on Location loaders with ROPS canopy or Cab L ROPS frame, inside Product code A49519 ROPS/FOPS Approval, on Location loaders with Cab GT Cab GT, inside...
Page 35 Avant 635i 640i Description of the loader Correct type of hydraulic oil Location See page 139 Near hydraulic oil filler opening. The original hydraulic oil filled by the manufacturer is shown with one of the following labels. Product codes A446611...
Page 36: Technical Specifications
Description of the loader Avant 635i 640i Technical specifications Dimensions Height and width Tyre Width Height General dimensions With standard wheels 27x8.50-15" TR 1030 mm 2048 mm Length 2610 mm 23x8.50-12" Width 1290 mm 1080 mm 1955 mm TR/GR Height 2035 mm 23x10.50-12"...
Page 37: General Information
2 auxiliary hydraulic pumps Standard: Faster multiconnector system on front. Auxiliary hydraulics Optional: Extra auxiliary hydraulics coupling on front or rear. Attachment coupling Avant quick coupling attachment plate Hydraulic oil tank capacity 38 l ISO VG 46, mineral oil only Hydraulic oil type...
Page 38: Engine Specifications
Engine oil requirements Kohler KSD Engines (Avant 635i 640i) The engine requires high-quality engine oil to work properly. The oil must meet the API CI-4 / ACEA E7 class, and the viscosity recommendations that depend on ambient temperature. See also Kohler KSD Operator's Manual.
Page 39: Fuel Requirements
Contact Avant service in case of problems related to fuel in...
Page 40: Tyres
Use tyre and rim models that are recommended by Avant to ensure that the tyres meet the dimension, load, and speed requirements for this loader model. Replace tyres if there are visible damages on the tyre or rim, or if the wear surface of the tyre has worn, or if there are visible differences between the tyres.
Page 41: Snow Chains
Use only spacers recommended by Avant Tecno Oy. Too thick spacers damage hydraulic motors. Contact your Avant dealer more information.
Page 42: Auxiliary Hydraulics Oil Flow
Description of the loader Avant 635i 640i Auxiliary hydraulics oil flow Ballasted tyres The following graphs show auxiliary hydraulics output flow at different engine rpm levels. The 1- Some tyres can be filled with special type of heavy pump setting is illustrated with dashed line and 2- foam that creates additional counterweight.
Page 43 Avant 635i 640i Description of the loader...
Page 44: Lift Capacity
Lift capacity Avant 635i 640i Lift capacity Lift capacity describes the load the loader can counterweights affect handle. Lift capacity is limited by the following main stability - Also the driver. Always factors: lower the load on the ground WARNING Stability of the loader before leaving the driver's seat.
Page 45 Avant 635i 640i Lift capacity  60 % ROC can be used for general pallet fork Definitions use. The ROC chart in this manual and on the label in the loader will use this value. Any illustration, chart, table or value of tipping ...
Page 46: Load Charts
The load control system will stop boom In this Operator's Manual there is only a load chart movements (lifting, lowering, extending, and tilting an for the pallet forks A21039. All Avant attachments attachment up). Retracting the boom and tilting an attachment down can still be done.
Page 47 Avant 635i 640i Lift capacity The control system will not indicate the risk of tipping Risk of tipping over - Observe over in case of the load indicator warning. When  sudden overload load indicator warning WARNING  moving the load when the boom is in raised...
Page 48: Rated Operating Capacity
Lift capacity Avant 635i 640i Load chart on the left side of the label: Rated operating capacity The graphic on the left side of the label shows the To easily determine how much load the loader can distance of the load in different positions of the handle safely, a table of the tipping load and a loader boom.
Page 49 Avant 635i 640i Lift capacity Rated operating capacity label A461927 A, in kilograms The ROC table is valid, when:  The ground is firm and level  Loader is stationary or driven max 2 km/h, with smooth and slow control movements ...
Page 50: Tipping Load - Load Diagram
Lift capacity Avant 635i 640i Tipping load - Load diagram With the diagram the load handling capability of the How to read the load diagram loader can be evaluated, according to the distance Tipping load with the loader frame in straight between the centre of gravity of the load and the position.
Page 51 Avant 635i 640i Lift capacity How to estimate actual lifting capacity The actual tipping load and stability of the loader depends on many factors that you must consider when you handle heavy loads or attachments. Listed in the table below are many factors that influence the stability of the loader.
Page 52: Controls And Options Of The Loader
Controls and options of the Loader Avant 635i 640i Controls and options of the Loader This chapter describes the location and function of the controls of the loader. The location and function of controls may be slightly different in different models and cab versions. See the following pages for information about the controls and the options of the loader.
Page 53: Overview Of Controls
Avant 635i 640i Controls and options of the Loader Overview of controls Reference Page Dashboard Ignition switch Multi-function display Switches on the dashboard Indicator lights Control lever of boom and bucket Control levers Hand throttle lever Control switches on the panel...
Page 54 Controls and options of the Loader Avant 635i 640i Switches on the panel The number of the additional control switches depends on which options have been installed on the loader. The position and order of switches may be different than shown in this chapter.
Page 55: Dashboard
Avant 635i 640i Controls and options of the Loader Dashboard Switches and indicator lights The dashboard on the right side of the driver’s seat includes multi-function display, indicator lights and Switches on the dashboard: switches for controlling the loader. There are two...
Page 56: Multi-Function Display
If this light remains lit, turn battery disconnect switch to OFF and contact Avant service. Load indicator warning Warning: Too heavy load is being lifted. See page 44.
Page 57 Avant 635i 640i Controls and options of the Loader Control buttons of the display Push this button to return to the basic dashboard view. Push again cycle through available dashboard views. Push this button to show information messages in bar.
Page 58 Controls and options of the Loader Avant 635i 640i Warning and information symbols, loader Warnings and symbols on the display Symbol Colour Remarks Safety alert symbol The display also shows information and warnings When this symbol appears, related to loader and its engine.
Page 59 Avant 635i 640i Controls and options of the Loader Load control symbols on the display Symbol Description Audible warning signal Load indicator system is active The loader symbol without frame indicates that the load indicator system is active but the load control system is No audible signal.
Page 60 Follow safe shutdown procedure before restart. After shut down wait until display shuts down completely. Turn ignition key on again. Contact Avant service if the warning message persists after recommended actions and restart of the loader. Warning and information messages on display...
Page 61 If you need to continue use of the boom floating, lower the boom down and activate the function again. RE-CALIBRATE LOAD Load indicator system needs to be re-calibrated. Contact Avant service. INDICATOR DISABLE SMOOTH DRIVE Smooth drive mode prevents activation of hydraulics. Switch smooth drive off. If you need to continue use of the smooth drive, activate the function again.
Page 62 Controls and options of the Loader Avant 635i 640i Text on display: Explanation: Language Parameter name for setting language. Screen brightness (Lights OFF) Parameter name for adjusting screen brightness when drive/work lights are off Screen brightness (Lights ON) Parameter name for adjusting screen brightness when drive/work lights are on Insert passcode to reset error log Info text to insert passcode in order to reset error log.
Page 63: Control Of Loader Boom, Auxiliary Hydraulics And Other Functions
Avant 635i 640i Controls and options of the Loader Control of loader boom, auxiliary hydraulics and other functions Most of the functions of the loader are controlled with the controls at the right side of the operator: Boom and bucket movements, auxiliary hydraulics (attachments), auxiliary hydraulics pump speed etc., depending on loader model.
Page 64: Hand Throttle Lever
Controls and options of the Loader Avant 635i 640i 3. Telescopic boom control lever 4. Hand throttle lever The telescopic boom makes many tasks easier, also The engine running speed is controlled with the hand those that do not involve lifting. You can, for throttle lever.
Page 65: Parking Brake Switch
Avant 635i 640i Controls and options of the Loader 5. Parking brake switch 6. Joystick - 8 function (option) The parking brake is activated when loader is The loader can be equipped, as an option, with an 8- switched off or when hydraulic pressure is otherwise function joystick.
Page 66: Control Lever Of Extra Hydraulics Outlet (Option)
Opticontrol replaces previously available ® Attachment control switch pack option for Avant loaders. 3. Anti-slip control switch (option) When the Opticontrol is installed to the loader, there ® An optional switch on the backside...
Page 67 Avant 635i 640i Controls and options of the Loader 1 and 2 pump setting There are two operating modes of the Opticontrol . Choose the ® Some attachments require high oil flow of hydraulic mode depending system to work in the most effective way. The loader attachment.
Page 68: Power Take Off Switch (Pto) And Load Control Override Switch
Controls and options of the Loader Avant 635i 640i Risk thrown objects, Power take off switch (PTO) and Load control override switch increased noise and vibration, and equipment damage - Check WARNING The switch has two functions: the maximum oil flow of each PTO Mode attachment.
Page 69: Electric 12 V Outlet
12 V outlet of the loader. suitable location near You can also contact your Avant dealer to fit an the driver's seat. electric plug to the attachment multiconnector. Diagnostics port In the dashboard near the driver's seat there is a diagnostics port.
Page 70: Boom Floating
Controls and options of the Loader Avant 635i 640i Boom floating Boom self-levelling (option) Avant 635i/640i loaders are equipped with a boom Self-levelling is a system that floating as a standard. The boom floating is keeps the attachment tilted in...
Page 71: Smooth Drive (Option)
Avant 635i 640i Controls and options of the Loader Risk of release of pressurised Smooth drive (option) hydraulic Deactivate Avant 635i/640i loaders can be equipped with the pressure accumulator before WARNING smooth drive system that is a suspension system for...
Page 72 Controls and options of the Loader Avant 635i 640i Risk of crushing and impact - Additional counterweights Heavy counterweights increase Additional counterweights can be installed to increase the stability of loader when handling heavy risk of tipping over and loss of WARNING loads or attachments.
Page 73: Adding Or Removing Counterweights
Avant 635i 640i Controls and options of the Loader Risk of sudden loss of stability - Adding or removing counterweights Always install When installing removing counterweights counterweight firmly. CAUTION appropriate lifting equipment must be used. Counterweight can fall from the...
Page 74: Trailer Coupling (Option)
Controls and options of the Loader Avant 635i 640i Risk of moving or falling of the Trailer coupling (option) loader - Never lift or tie down The loader can be equipped with a trailer coupling for loader from side DANGER towing of trailers.
Page 75: Extra Auxiliary Hydraulics Outlets, Front And Rear (Option)
Extra auxiliary hydraulics outlets, Trailer light connector is available as an option for front and rear (option) Avant loaders. When towing a trailer with the loader on public roads, the trailer lights must be used. In addition to the standard auxiliary hydraulics outlet,...
Page 76: Reverse Buzzer (Option)
Controls and options of the Loader Avant 635i 640i Reverse buzzer (option) A reverse buzzer gives an audible signal whenever reversing with the loader. The buzzer alarms others of an approaching machine. Reverse buzzer has an ON/OFF selection in settings menu. It is possible to select OFF e.g.
Page 77: Seat - Seat Belt And Seat Adjustments
Avant 635i 640i Controls and options of the Loader Seat - Seat belt and seat adjustments Risk of falling from the loader Suspension seat and getting run over by loader - The suspension seat has the following adjustments: Never carry passengers. The...
Page 78: Suspension Seat (Cab Gt)
Controls and options of the Loader Avant 635i 640i Suspension seat (Cab GT) Seat heater of air suspension seat The air suspension A suspension seat with textile cover is a standard for seat is equipped with the Cab GT. A vinyl cover is an option.
Page 79: Lights
Loaders that are fitted with the road traffic light kit panel. have a multi-function control switch fitted to the steering column. Avant work lights are LED modules. There are different brightness options, check your Avant dealer. Risk of burns - Never touch the lamp units. The front surface and...
Page 80 Warning lights on Cab GT (option) On Avant 635i/640i loaders with Cab GT flashing warning lights that are integrated to the cab are available as an option. There are two lights at the front and two at the back.
Page 81: Cabs (Option)
Avant 635i 640i Controls and options of the Loader Cabs (option) The Avant 635i 640i can be equipped with an Standard and optional equipment on different enclosed operator's cab. The Cab GT can only be cab models ordered to new loaders, it cannot be retrofitted. The...
Page 82: Cab Safety
Controls and options of the Loader Avant 635i 640i Risk of breaking glass - Do Cab Safety not drive with an open cab Make sure visibility from the cab is adequate. Keep door. The door may break CAUTION all window panels clean and clear of snow, ice, etc.
Page 83: Ventilation And Heating
Avant 635i 640i Controls and options of the Loader Windscreen washer and wiper (Cab L) If used for heating, switch off the air circulation as soon as the On machines with Cab L the windscreen washer is temperature in the cab is sufficient, operated with a switch on the dashboard.
Page 84 Controls and options of the Loader Avant 635i 640i Risk of collision - Never drive the loader when the visibility is poor. Do not drive unless basic CAUTION visibility directions achieved. Allow the loader to warm up properly. Air conditioning (Option for Cab GT) Cab GT can be equipped, as an option, with air conditioning (cooling).
Page 85: Operating Instructions
Avant 635i 640i Operating instructions Operating instructions Always remember – safety first. Test all the functions of the loader at an open and safe place. Make sure that there are no persons in the operating area of the machine and the danger zone of the attachment.
Page 86: Starting The Loader
Operating instructions Avant 635i 640i Starting the loader Risk of asphyxiation - Do not Before start start the loader in enclosed Before starting the engine do the daily checks, see space - Exhaust emissions can DANGER page 121. kill within minutes.
Page 87: To Start The Engine
Avant 635i 640i Operating instructions Ignition key To start the engine Perform daily checks (see Maintenance & Service on page 115) Turn the battery disconnect switch to ON Sit on the driver's seat, adjust seat and fasten seat belt. The ignition key can be switched into the The loader will not start unless driver is seated.
Page 88 Operating instructions Avant 635i 640i Risk of injury to bystanders - After starting: Avoid unintended movements of After starting the engine, complete the daily checks, see page 120. the attachment: WARNING  If the auxiliary hydraulics is switched on during starting...
Page 89: Stopping The Engine (Safe Stopping Procedure)
Avant 635i 640i Operating instructions Avoid unnecessary idling of the engine over long periods of time. Idling the loader causes internal wear of the engine and emissions. diesel engines intended to be left running at idle speed over long periods of time.
Page 90: Drive Control
Operating instructions Avant 635i 640i Drive control Principle of operation Drive pedals Avant 635i/640i loader is equipped with a hydrostatic Using the drive pedals: drive system. This based variable displacement hydraulic pump in the drive circuit that is proportionally controlled with the two drive pedals.
Page 91 Avant 635i 640i Operating instructions Drive speed range selection switch OptiDrive® Avant 640i is equipped with The loader is equipped with the efficient Avant two-speed hydraulic drive OptiDrive hydraulic drive system as standard. ® motors. Drive speed range can be selected with the...
Page 92 Operating instructions Avant 635i 640i X-lock (Cross-lock) and anti-slip Anti-slip valve (option) X-lock (Cross-lock) If the loader is equipped with the optional anti-slip The hydraulic drive circuit has a system that allows valve, there is an additional switch on the back of the the wheels on the left and right side of the loader to joystick.
Page 93: Operation In Cold Conditions
If the loader is used constantly in high ambient temperatures, hydraulic oil type and viscosity must be suitable for these conditions. Contact Avant service. In case the braking power of the Risk of fire and electric shock -...
Page 94 The engine block heater A458197 is intended to operate with electric supply of 220 - 240 V, 50-60 Hz AC power. Do not modify the cable or use transformers. Contact your Avant dealer service point information about other types of block heaters.
Page 95: Steering Of The Loader
Avant 635i 640i Operating instructions Steering of the loader Risk of collision and crushing - Steering of the loader is controlled with the steering Stay and keep hands and feet wheel. The steering system is hydraulically powered. inside the safety frame. Always...
Page 96: Material Handling
ROPS. If you do not use Operator's Manual of an Avant attachment. seat belt, there is a risk of getting thrown off from the driver's seat Risk of tipping over - Loader can...
Page 97: In Case The Loader Tips Over
Avant 635i 640i Operating instructions In case the loader tips over Avoid tipping over of the loader with careful operation and with the instructions given throughout this Operator's Manual. However, it is important to know what to do in case the loader tips over.
Page 98 Operating instructions Avant 635i 640i...
Page 99: Working With Attachments
 Make sure that the attachment is compatible with the loader: Avant 635i 640i must be specifically listed in the Operator's Manual of the attachment. Contact your Avant dealer if necessary. Incompatible attachments can cause risks of injuries resulting from eg.
Page 100 Use only Avant attachments that have been designed for your loader model. Any attachment that is fitted to the loader must be designed to be used specifically with Avant 635i 640i, and this must be stated in the Operator's Manual of the attachment. The manufacturer of the attachment is responsible for evaluating the risks related to coupling the attachment and using it with this loader model.
Page 101: Coupling The Attachments
Avant 635i 640i Working with attachments Coupling the attachments The attachment is mounted to the loader boom by using the quick coupling plate on the loader boom and the counterpart on the attachment. As standard, the attachment is coupled with two manually operated locking pins of the coupling plate.
Page 102 Working with attachments Avant 635i 640i Step 3:  Lift the boom slightly – pull the boom control lever backward to lift the attachment just off the ground.  Turn the boom control lever left to turn the bottom section of the quick coupling plate of the loader onto the attachment.
Page 103: Connecting The Hydraulic Hoses Of The Attachment
Avant 635i 640i Working with attachments Connecting the hydraulic hoses of the attachment Hydraulic hoses of the attachment are equipped with the multiconnector system, which connects all hoses at the same time. Risk of movement of the attachment and ejection of hydraulic oil - Never connect or disconnect quick couplings or other hydraulic components while the auxiliary hydraulics control lever is locked on or if the system is pressurized.
Page 104: Using The Auxiliary Hydraulics
Working with attachments Avant 635i 640i Using the auxiliary hydraulics Auxiliary hydraulics (hydraulically operated attachments) are controlled with the lever on the control panel, or with the buttons on the 8 function joystick (see page 63). The locking position of the lever facilitates operation of the attachments that require constant oil flow (rotary broom, backhoe etc.).
Page 105: Releasing The Residual Pressure Of Hydraulic System
Avant 635i 640i Working with attachments Releasing the residual pressure of hydraulic system Make sure that there is not pressure in the hydraulic system that could cause danger during service operations. To release the pressure in hydraulic system: Lower the boom down completely and place attachment firmly on the ground...
Page 106: Coupling Adapters
Avant 635i 640i Coupling adapters Avant offers coupling adapters to help the use of some specific attachments. See the Operator's Manual of each attachment if an adapter can be used. Also each adapter has their own Operator's manual. Always read the manual and keep it available.
Page 107 Avant 635i 640i Working with attachments Rotating adapter A424406 The rotating adapter is intended for same kind of work as the tilting adapter. The fully rotating adapter makes it possible to turn the attachment fully upside down. This can be helpful in levelling work.
Page 108 Working with attachments Avant 635i 640i...
Page 109: Storage, Transport, Tie Down And Lifting
Avant 635i 640i Storage, Transport, Tie down and Lifting Storage, Transport, Tie down and Lifting Before transporting or lifting the loader: Tie down points  Mount the articulation frame lock, see page 119 The loader must be tied down securely if transporting ...
Page 110 - Never load trailer so To protect the loader during transport, transport that there is lifting force on the cover is available. Contact your Avant dealer. DANGER tow bar. Trailer must never be loaded so that the centre of gravity is behind the axle of the trailer.
Page 111 Avant 635i 640i Storage, Transport, Tie down and Lifting Consider all additional counterweights, attachments, Tie down options and other equipment when estimating the load on the trailer. Additional counterweights, among other Optional equipment for frequent trailer transport options and equipment, may make the loader heavier than indicated in the identification plate.
Page 112: Storage
Eyelets on extra trouble-free use of the loader. side counterweights  It is recommended to have the periodic service installing or removing the side made before storage. Contact Avant service. counterweight only. Never attempt  Clean the loader carefully. lift loader from ...
Page 113: Lifting Of The Loader
Avant 635i 640i Storage, Transport, Tie down and Lifting Lifting of the loader The following picture shows the principle of lifting a loader with the ROPS frame using four lifting straps: Lifting a loader with ROPS: When lifting a loader...
Page 114 Storage, Transport, Tie down and Lifting Avant 635i 640i...
Page 115: Service And Maintenance
Before working on the electric system or battery, disconnect the battery.  Contact your Avant dealer or Avant service for spare parts or more information about any service procedure. Risk of burns, cuts, and sprayed oil or dirt - Use...
Page 116 Service and maintenance Avant 635i 640i High-pressure ejection of fluid may penetrate skin and cause serious injuries - Never handle pressurised components. Before handling hydraulic components, make sure that the hydraulic system of the attachment and the loader are completely de- DANGER pressurised.
Page 117: Engine Compartment And Storage Spaces On The Loader
Avant 635i 640i Service and maintenance Risk of burns - Allow loader to Consider the environment cool before opening covers. Engine parts, exhaust system, and The fluids in the machine are WARNING harmful environment. hydraulic parts may be extremely Never allow fluids to leak in the hot after use.
Page 118 Service and maintenance Avant 635i 640i Storage inside cab There are storage areas around the driver's seat and elsewhere in the cab. Place objects so that they will not interfere with controls of the loader and will not block visibility.
Page 119: Installing Of Service Support And Frame Lock
Avant 635i 640i Service and maintenance Service support in place Installing of service support and frame lock Installing boom service support: The red service support of the boom lift cylinder is located at the tip of the boom, behind the attachment coupling plate.
Page 120: Daily Inspections And Periodic Service Schedule
Follow the recommended service schedule. Keep records of services made. Contact Avant service if you are unsure about any of the service procedures, or if you need spare parts.
Page 121 Avant 635i 640i Service and maintenance Daily maintenance and inspections  Do a walk-around check of the loader before each working shift. Complete the tasks listed below daily before starting to use the loader and after each 10 working hours.
Page 122: Periodic Service And Maintenance
In addition to the items listed in the daily and weekly inspections, the following service procedures must be completed periodically. Some of the listed service operations require specialized skills, equipment, and knowledge, and they are intended only for professional technicians. Contact your Avant dealer to locate your nearest Avant service. After every 400 hours of use or...
Page 123 Risk of injuries caused by incorrect parts or service - Use only original spare parts supplied by Avant. Use of wrong parts may cause serious personal injuries related to damage of the loader or premature wear of its components. Always use original Avant WARNING parts that are specifically designed for and intended to be used with this loader model.
Page 124: Daily And Routine Maintenance Procedures
Service and maintenance Avant 635i 640i Daily and routine maintenance procedures Risk of fire or explosion - Handle fuel with care 1. Add fuel  Always stop the engine and allow it Check fuel level from fuel gauge in dashboard and fill to cool before refueling.
Page 125 Do not use the loader if you see damaged, bent, heavily corroded, or deformed metal B. Clean the interior of the loader parts. Contact Avant service for service, if necessary. Clean cab and interior with appropriate mild detergent and cleaning supplies. Keep the cab and ...
Page 126 Service and maintenance Avant 635i 640i Never spray in the engine compartment with a If the optional air conditioning system is installed, pressure washer. Do not pour water on the engine. there is a cooling fan at the rear of the cab.
Page 127 Avant 635i 640i Service and maintenance To remove the cover completely, unplug the electric 4. Add grease to the lubricating cable at the upper left corner. points Greasing of the pivot points is essential to avoid wear of joints. Lack...
Page 128 Service and maintenance Avant 635i 640i B. Front frame and telescopic boom Greasing points are listed in the following table. Reference Number of points 1. Articulation joint Left side of loader 2. Steering cylinder Both ends of steering cylinder, near articulation joint 3.
Page 129 All pivot pins must be in good condition and secured in place. taken to Avant service for checking. Make sure that the pivot pins are not worn and It is not allowed to repair the ROPS there is no excessive slack in the joints.
Page 130: Check Wheels
Make sure that replacement hoses and fittings meet the ratings and specifications of the original hoses, and are compatible with the fittings on the loader. Contact Avant service when hoses or fittings need to be replaced. Hydraulic fittings of drive motors and hoses of...
Page 131: Check Hydraulic Oil Level
Do not operate the loader if the attachment locking system pins do not lower down completely. If the locking system do not work correctly contact Avant service. Use the hydraulic locking system periodically even if you did not change attachments.
Page 132 Service and maintenance Avant 635i 640i Now you can see Check cab air filter the filter element inside the slot. If the loader is equipped with an enclosed cab A replaceable cab air filter can be changed from outside the cab, under the door on the left side. The cartridge should be checked and changed more often when operating the loader in dusty conditions.
Page 133: Engine Related Inspections And Routine Maintenance
Engine related inspections and top of the engine. routine maintenance Avant 635i/640i loaders are equipped with a Kohler KSD diesel engine. Service and maintenance instructions for the engine can be found in the Kohler KSD Operator’s Manual supplied with the loader.
Page 134 Contact Avant service. Drain the separated water by turning a small plug on the bottom of main fuel filter. Collect Check the antifreeze properties of the coolant the water and dispose as used oil.
Page 135 Avant 635i 640i Service and maintenance Check battery and electric Squeeze the rubber vent on the filter housing cables cover to drain water and dirt from the filter. Wipe the outer surface of the air filter housing Remove the engine cover and check the cleanness, clean before opening the filter.
Page 136 Service and maintenance Avant 635i 640i Disconnect (isolate) the battery Check cables for signs of aging and wear. If a cable or its insulation has damaged, worn, first using battery or become brittle, there is an increased risk disconnect switch.
Page 137: Inspections After Starting The Loader
Avant 635i 640i Service and maintenance Risk of tipping over - Load Inspections after starting the sensor must calibrated. loader Wrong calibration setting of the DANGER After starting the loader as shown on page 87, sit on load control system can make the the driver's seat and fasten the seat belt.
Page 138: Periodic Service
Operator's or tilting to the extreme positions. Manual. Use any attachment only for its Contact your Avant dealer to locate your nearest intended use. Avant service. Test drive control and steering 1. Change engine air filter ...
Page 139: Change Hydraulic Oil
Check the label on the loader for information which oil has been added in factory. If ambient temperature is hot, higher viscosity oil may be required. Contact your Avant dealer or authorised service. In freezing temperatures use high-quality oil which...
Page 140: Check Fuel Lines
ON, but do not start. Allow the electric fuel pump to circulate fuel for a couple of minutes before starting. Calibration must be made only by a trained and authorized Avant service partner. 8. Check fuel lines Check the battery and its cables, ...
Page 141 Type: 12 V, DIN 575-12 >720A 72 Ah the hydrostatic drive system and its variable speed pump must be carried out by Avant service. Size: L=278 mm H=175 mm W=175 mm Adjustment of any hydraulic pressure is allowed only Always handle batteries with care.
Page 142 If you suspect that the pulling force of There are two pressure relief valves at the main the loader has decreased contact your nearest Avant control valve of the boom and auxiliary hydraulics. service. Also the power control valve, the hydraulic...
Page 143 However, if there is substantial easily when pressing the drive pedals, or the loader wear in the slide pads it is loses pushing force, contact your nearest Avant advisable to replace both pads service partner for check and adjustment of the power control valve.
Page 144 800 hours of use. Contact your Avant service if you suspect abnormal To check these slide pads, take engine vibration or noise. the inner boom completely out The cooling fan and parts related to the cooling of the outer boom.
Page 145 Avant 635i 640i Service and maintenance Check, test, and, if necessary, clean all safety Check optional equipment related equipment of the loader. Check function and condition of optional equipment  Check the ROPS and FOPS structures for visible that has been installed to the loader: damages.
Page 146 Refrigerant type: R134a if these actions are made in early stages. Contact Amount: ca. 730 g Avant service if there is play in the articulation joint. Oil type: PAG Wear of the articulation joint is usually caused by lack of lubrication. Keep the loader clean and ensure Reset service reminder adequate lubrication of the articulation joint.
Page 147 Service and maintenance Filters - list of filters To receive regular service parts easily, you can order the following service packages from your dealer. To order parts please contact your Avant dealer or authorised service. Avant 635i/640i Filter kit A459095...
Page 148: Electric System & Fuses
The electric cables or other switch (Avant 640i) electric parts may be damaged causing a risk of fire. Electric cables may be damaged. Contact Avant 12 V outlet service, if necessary. If any of fuse or relay needs to be replaced, make ECU diagnostics sure to always use correct type of spare parts.
Page 149 Remove the battery completely from the loader. Then contact authorized Avant service for thorough inspection of the electric systems of the loader. Fuses in Cab GT There is an additional fuse box in Cab GT, near the seat belt buckle.
Page 150 Service and maintenance Avant 635i 640i The battery may not have enough Vehicle Power Distribution Unit charge to start the loader even if the PDU receives 12 V DC power. An electric power distribution unit (PDU) is located at the right side of the engine compartment.
Page 151: Jump Start And Auxiliary Power
Charge the battery with an external give or receive power for jump charger whenever it is possible. start. The vehicle can get severely damaged when giving or receiving auxiliary starting power. Avant takes no responsibility of damages caused by giving or receiving auxiliary power.
Page 152: Limp Home Mode
Service and maintenance Avant 635i 640i Risk of electric shock, sparks, Limp home mode fire, and burns - Always use If the control system of the loader has encountered good quality jump start cables CAUTION an error and the loader cannot be moved to a safe...
Page 153: End Of Life Disposal
Avant 635i 640i Service and maintenance The system asks for confirmation to activate the limp home mode. Activate the mode with confirmation button (2) only if the loader cannot be recovered by other means. End of life disposal Recycle and dispose of the loader properly when the loader is at the end of its useful life cycle.
Page 154 Avant 635i 640i...
Page 155: Troubleshooting
Engine does not crank Check fuses. If fuse blows again, find out the cause. Contact Avant service. Fuse F11 in PDU is for starter coil. Fuse is blown Also check the main fuse that is installed in the battery cables.
Page 156 Incorrect calibration can prevent movements of the boom. Calibration of load control Contact your nearest Avant service for calibration of the load system is not made correctly Boom does not move control system.
Page 157 Seat belt is not fastened seat belt must be fastened. Unfasten the seat belt and fasten it again. Bad connection on the wiring of Check wires, fuse, and switch, repair if necessary. Contact Avant the parking brake switch, blown service. fuse, or faulty switch...
Page 158 Troubleshooting Avant 635i 640i...
Page 159: Maintenance Log
Avant 635i 640i Maintenance log Maintenance log 1. Customer 2. Loader model Serial number 3. Date of delivery Date of service Operating Serviced by: Remarks dd / mm / yyyy hours Stamp/signature _____/ 50 h ___/___/_____ _____/ 450 h ___/___/_____...
Page 160 Avant 635i 640i Notes...
Page 161 Avant 635i 640i Notes...
Page 162: Index
Drive control • 90 capacity • 21, 140 Availability of options • 6 Drive pedals • 53, 90 Check the boom, pivot pins, Avant warranty • 7 Drive speed and pulling force • and other metal structures 37, 41 visually • 125, 129...
Page 163 Avant 635i 640i Extra work light kit (option) • Personal safety and protective 54, 79 equipment • 17 Lift capacity • 16, 44, 50, 56, Power take off switch (PTO) and Load control override Lifting of the loader • 113 switch •...
Page 164 Avant 635i 640i Switches on the panel • 53, 54, Working with attachments • 99 55, 91, 102 X-lock (Cross-lock) and anti- Technical specifications • 36 slip • 55, 92 Telescopic boom control lever • 64 Test and check engine for vibrations, noise, and general performance •...
Page 165 Avant 635i 640i 635i/640i EC DECLARATION OF CONFORMITY Manufacturer: Avant Tecno Oy Ylötie 1, 33470 Ylöjärvi, Finland Technical Construction File Location: Same as Manufacturer We hereby declare that the machine detailed in this document conforms to the following EC Directives...

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