Wacker Neuson BFS 2020AS Floor Saw Operator's Manual
Wacker Neuson BFS 2020AS is a powerful and versatile concrete floor saw designed for cutting decorative grooves and control joints in concrete slabs. This gas-powered saw features a robust construction, a user-friendly control panel, and a variety of safety features to ensure safe and efficient operation. It can be used for various projects, including residential and commercial construction, renovation, and repair.
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EN
5200002948 01 0412
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PRELIMINARY
Operator’s Manual
Floor Saw
BFS 2020AS
Copyright notice
Trademarks
Manufacturer
Original instructions
© Copyright 2012 by Wacker Neuson Production Americas LLC
All rights, including copying and distribution rights, are reserved.
This publication may be photocopied by the original purchaser of the machine. Any other type of reproduction is prohibited without express written permission from Wacker Neuson Production Americas LLC.
Any type of reproduction or distribution not authorized by Wacker
Neuson Production Americas LLC represents an infringement of valid copyrights. Violators will be prosecuted.
All trademarks referenced in this manual are the property of their respective owners.
Wacker Neuson Production Americas LLC
N92W15000 Anthony Avenue
Menomonee Falls, WI 53051 U.S.A.
Tel: (262) 255-0500 · Fax: (262) 255-0550 · Tel: (800) 770-0957 www.wackerneuson.com
This Operator’s Manual presents the original instructions. The original language of this Operator’s Manual is American English.
BFS 2020AS
Foreword
Foreword
SAVE THESE INSTRUCTIONS—This manual contains important instructions for the machine models below. These instructions have been written expressly by
Wacker Neuson Production Americas LLC and must be followed during installation, operation, and maintenance of the machines.
Machines covered by this manual
Machine
BFS 2020AS
Item Number
0620086, Rev. 201-
Machine documentation
From this point forward in this documentation, Wacker Neuson Production
Americas LLC will be referred to as Wacker Neuson.
Keep a copy of the Operator’s Manual with the machine at all times.
Use the separate Parts Book supplied with the machine to order replacement parts.
If you are missing either of these documents, please contact Wacker Neuson to order a replacement or visit www.wackerneuson.com.
When ordering parts or requesting service information, be prepared to provide the machine model number, item number, revision number, and serial number.
Expectations for information in this manual
This manual provides information and procedures to safely operate and maintain the above Wacker Neuson model(s). For your own safety and to reduce the risk of injury, carefully read, understand, and observe all instructions described in this manual.
Wacker Neuson expressly reserves the right to make technical modifications, even without notice, which improve the performance or safety standards of its machines.
The information contained in this manual is based on machines manufactured up until the time of publication. Wacker Neuson reserves the right to change any portion of this information without notice.
CALIFORNIA
Proposition
65 Warning
Engine exhaust, some of its constituents, and certain vehicle components, contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Laws pertaining to spark arresters
NOTICE: State Health Safety Codes and Public Resources Codes specify that in certain locations spark arresters be used on internal combustion engines that use hydrocarbon fuels. A spark arrester is a device designed to prevent accidental discharge of sparks or flames from the engine exhaust. Spark arresters are qualified and rated by the United States Forest Service for this purpose. In order to comply with local laws regarding spark arresters, consult the engine distributor or the local
Health and Safety Administrator.
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Foreword BFS 2020AS
Manufacturer’s approval
This manual contains references to approved parts, attachments, and modifications. The following definitions apply:
Approved parts or attachments are those either manufactured or provided by
Wacker Neuson.
Approved modifications are those performed by an authorized Wacker
Neuson service center according to written instructions published by Wacker
Neuson.
Unapproved parts, attachments, and modifications are those that do not meet the approved criteria.
Unapproved parts, attachments, or modifications may have the following consequences:
Serious injury hazards to the operator and persons in the work area
Permanent damage to the machine which will not be covered under warranty
Contact your Wacker Neuson dealer immediately if you have questions about approved or unapproved parts, attachments, or modifications.
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BFS 2020AS Table of Contents
Foreword 3
1 Safety Information
1.1
1.2
1.3
1.4
1.5
7
Signal Words Used in this Manual ....................................................... 7
Machine Description and Intended Use ............................................... 8
Operating Safety .................................................................................. 9
Operator Safety while Using Internal Combustion Engines ............... 11
Service Safety .................................................................................... 12
2 Labels
2.1
2.2
14
Label Locations .................................................................................. 14
Label Meanings .................................................................................. 15
3 Initial Setup
3.5
3.6
3.7
3.8
3.1
3.2
3.3
3.4
19
Preparing the Machine for First Use ................................................... 19
Installing the Handlebar and Pointer .................................................. 20
Recommended Fuel ........................................................................... 21
Refueling the Machine ........................................................................ 22
Preparing the Engine .......................................................................... 23
Checking the Hydrostatic Transmission ............................................. 24
Mounting the Blade ............................................................................ 25
Aligning the Front Pointer ................................................................... 26
4 Operation 27
4.5
4.6
4.7
4.8
4.1
4.2
4.3
4.4
Features and Controls ........................................................................ 27
General Sequence of Operation ......................................................... 28
Before Starting ................................................................................... 29
Stopping the Machine ......................................................................... 29
Maneuvering the Saw ......................................................................... 30
Aligning the Saw with a Marked Line ................................................. 31
Dry Cutting ......................................................................................... 32
Wet Cutting ......................................................................................... 33
4.9
Cutting Guidelines .............................................................................. 35
4.10
Blade Speed and Throttle Setting ...................................................... 36
4.11
Cutting with the Blade on the Left Side .............................................. 36 wc_bo5200002948_01TOC.fm
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Table of Contents BFS 2020AS
5 Maintenance 37
5.5
5.6
5.7
5.8
5.1
5.2
5.3
5.4
Maintaining the Emission Control System ...........................................37
Periodic Maintenance Schedule ..........................................................37
Before Servicing ..................................................................................38
Cleaning the Machine ..........................................................................38
Maintaining the Engine ........................................................................38
Inspecting the Blade ............................................................................39
Changing the Engine Oil .....................................................................40
Lubricating the Grease Points .............................................................41
5.9
Maintaining the Controls ......................................................................41
5.10
Checking the Hydrostatic Transmission ..............................................42
5.11
Adjusting and Maintaining the Drive Chain .........................................42
5.12
Adjusting the Friction Drive Wheels ....................................................43
5.13
Cleaning and Lubricating the Depth Control .......................................43
5.14
Checking the Water System ................................................................44
5.15
Setting the V-Belt Tension ...................................................................45
5.16
Checking for Misalignment ..................................................................46
5.17
Maintaining the Battery ........................................................................47
5.18
Replacing the Fuse .............................................................................49
6 Troubleshooting 50
7 Technical Data 52
8 Emission Control Systems Information and Warranty
8.1
53
Emission Control Systems Warranty Statement .................................53
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BFS 2020AS
1 Safety Information
Safety Information
1.1
Signal Words Used in this Manual
This manual contains DANGER, WARNING, CAUTION, NOTICE, and NOTE signal words which must be followed to reduce the possibility of personal injury, damage to the equipment, or improper service.
This is the safety alert symbol. It is used to alert you to potential personal hazards.
f Obey all safety messages that follow this symbol.
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
f To avoid death or serious injury from this type of hazard, obey all safety messages that follow this signal word.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
f To avoid possible death or serious injury from this type of hazard, obey all safety messages that follow this signal word.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
f To avoid possible minor or moderate injury from this type of hazard, obey all safety messages that follow this signal word.
NOTICE: Used without the safety alert symbol, NOTICE indicates a situation which, if not avoided, could result in property damage.
Note: A Note contains additional information important to a procedure.
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Safety Information
1.2
Machine Description and Intended Use
BFS 2020AS
This machine is a concrete floor saw. The Wacker Neuson Floor Saw consists of a gasoline engine, a fuel tank, an operator’s console, and a diamond-tipped circular blade protected by a safety guard. The gasoline engine supplies power to the blade through a belt- or direct-drive transmission. The operator walks behind the saw, guiding the rotating blade through the cut. From the console, the operator controls engine speed, cutting depth, and power transmission.
This machine is intended to be used for cutting decorative grooves and control joints in concrete slabs.
This machine has been designed and built strictly for the intended use described above. Using the machine for any other purpose could permanently damage the machine or seriously injure the operator or other persons in the area. Machine damage caused by misuse is not covered under warranty.
The following are some examples of misuse:
Using the machine as a ladder, support, or work surface
Using the machine for cutting loose materials, such as bricks or tiles
Using your hands to guide materials to be cut into the saw
Using the machine to carry or transport passengers or equipment
Operating the machine outside of factory specifications
Operating the machine in a manner inconsistent with all warnings found on the machine and in the Operator’s Manual
This machine has been designed and built in accordance with the latest global safety standards. It has been carefully engineered to eliminate hazards as far as practicable and to increase operator safety through protective guards and labeling.
However, some risks may remain even after protective measures have been taken.
They are called residual risks. On this machine, they may include exposure to:
Heat, noise, exhaust, and carbon monoxide from the engine
Fire hazards from improper refueling techniques
Fuel and its fumes
Personal injury from improper lifting techniques or operating techniques
Cutting hazards from blade segments or spinning blade if operating the machine incorrectly or inattentively, or from an exposed blade during transportation
Dust and vibration
To protect yourself and others, make sure you thoroughly read and understand the safety information presented in this manual before operating the machine.
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BFS 2020AS
1.3
Operating Safety
Operator qualifications
Safety Information
Only trained personnel are permitted to start, operate, and shut down the machine.
They also must meet the following qualifications:
have received instruction on how to properly use the machine are familiar with required safety devices
The machine must not be accessed or operated by:
children people impaired by alcohol or drugs
Operator training
Personal
Protective
Equipment
(PPE)
Before operating the machine:
Read and understand the operating instructions contained in all manuals delivered with the machine.
Familiarize yourself with the location and proper use of all controls and safety devices.
Contact Wacker Neuson for additional training if necessary.
When operating this machine:
Do not allow improperly trained people to operate the machine. People operating the machine must be familiar with the potential risks and hazards associated with it.
Wear the following Personal Protective Equipment (PPE) while operating this machine:
Close-fitting work clothes that do not hinder movement
Safety glasses with side shields
Hearing protection
Safety-toed footwear
Dust mask
Preparing for use
Read, understand, and follow procedures in this Operator’s Manual before attempting to operate equipment.
Do not use accessories or attachments that are not approved by Wacker
Neuson. Damage to equipment and injury to the user may result.
Always operate this machine with all safety devices and guards in place and in working order. Do not modify or defeat safety devices.
Use only diamond saw blades on this machine. As defined by ANSI B7.1, diamond saw blades are intended to cut construction materials such as concrete, asphalt, masonry block, brick, ceramic tiles, and stone.
During operation
Make sure that all other persons are at a safe distance from the machine. Stop the machine if people step into the working area of the machine.
Keep hands, feet, and loose clothing away from moving parts of the machine.
Always guide the saw in such a way that the operator is not squeezed between the saw and solid objects. wc_si000693gb.fm
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Safety Information
BFS 2020AS
Special care is required when working on uneven ground or when cutting coarse material. Make sure to stand firmly when operating the machine under such conditions.
Operate the saw in such a way that there is no danger of it turning over or falling in, when working near the edges of breaks, pits, slopes, trenches, and platforms.
Do not use choke to stop engine.
Do not leave machine running unattended.
Do not tamper with or disable the function of operating controls.
After use
Turn the engine OFF when the saw is not being operated.
Make sure that the saw will not tip over, roll, slide, or fall when not being operated.
Store equipment properly when it is not being used. Equipment should be stored in a clean, dry location out of the reach of children.
Close fuel valve on engines equipped with one when machine is not being operated.
10
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BFS 2020AS Safety Information
1.4
Operator Safety while Using Internal Combustion Engines
WARNING
Internal combustion engines present special hazards during operation and fueling.
Failure to follow the warnings and safety standards could result in severe injury or death.
f Read and follow the warning instructions in the engine owner’s manual and the safety guidelines below.
Operating safety
Refueling safety
DANGER
Exhaust gas from the engine contains carbon monoxide, a deadly poison.
Exposure to carbon monoxide can kill you in minutes.
f NEVER operate the machine inside an enclosed area, such as a tunnel, unless adequate ventilation is provided through such items as exhaust fans or hoses.
When running the engine:
Keep the area around exhaust pipe free of flammable materials.
Check the fuel lines and the fuel tank for leaks and cracks before starting the engine. Do not run the machine if fuel leaks are present or the fuel lines are loose.
When running the engine:
Do not smoke while operating the machine.
Do not run the engine near sparks or open flames.
Do not touch the engine or muffler while the engine is running or immediately after it has been turned off.
Do not operate a machine when its fuel cap is loose or missing.
Do not start the engine if fuel has spilled or a fuel odor is present. Move the machine away from the spill and wipe the machine dry before starting.
When refueling the engine:
Clean up any spilled fuel immediately.
Refill the fuel tank in a well-ventilated area.
Reinstall the fuel tank cap after refueling.
Do not smoke.
Do not refuel a hot or running engine.
Do not refuel the engine near sparks or open flames.
Use suitable tools for refueling (for example, a fuel hose or funnel).
Do not refuel if the machine is positioned in a truck fitted with a plastic bed liner.
Static electricity can ignite the fuel or fuel vapors.
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Safety Information
1.5
Service Safety
Service training
BFS 2020AS
Before servicing or maintaining the machine:
Read and understand the instructions contained in all manuals delivered with the machine.
Familiarize yourself with the location and proper use of all controls and safety devices.
Only trained personnel shall troubleshoot or repair problems occurring with the machine.
Contact Wacker Neuson for additional training if necessary.
When servicing or maintaining this machine:
Do not allow improperly trained people to service or maintain the machine.
Personnel servicing or maintaining the machine must be familiar with the associated potential risks and hazards.
Precautions
Personal
Protective
Equipment
(PPE)
Follow the precautions below when servicing or maintaining the machine.
Read and understand the service procedures before performing any service to the machine.
All adjustments and repairs must be completed before operation. Do not operate the machine with a known problem or deficiency.
All repairs and adjustments shall be completed by a qualified technician.
Turn off the machine before performing maintenance or making repairs.
Remain aware of the machine’s moving parts. Keep hands, feet, and loose clothing away from the machine’s moving parts.
Reinstall the safety devices and guards after repair and maintenance procedures are complete.
Disconnect the spark plug lead to prevent the engine from starting unexpectedly.
Ground the spark plug lead before servicing the machine.
Place the forward / reverse control in neutral.
Keep the area around the muffler free of debris such as leaves, paper, cartons, etc.
A hot muffler could ignite the debris and start a fire.
ALWAYS handle blades carefully. The blades can develop sharp edges which can cause serious cuts.
Wear the following Personal Protective Equipment (PPE) while servicing or maintaining this machine:
Close-fitting work clothes that do not hinder movement
Safety glasses with side shields
Hearing protection
Safety-toed footwear
In addition, before servicing or maintaining the machine:
Tie back long hair.
Remove all jewelry (including rings).
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BFS 2020AS
Machine modifications
Safety Information
When servicing or maintaining the machine:
Use only accessories/attachments that are approved by Wacker Neuson.
When servicing or maintaining the machine:
Do not defeat safety devices.
Do not modify the machine without the express written approval of Wacker Neuson.
Do not attempt to increase the maximum speed by tampering with the governor components or settings. Severe personal injury and damage to the machine may result.
Replacing parts and labels
Lifting and transporting
Cleaning
Fuel Safety
Replace worn or damaged components.
Replace all missing and hard-to-read labels.
When replacing electrical components, use components that are identical in rating and performance as the original components.
When replacement parts are required for this machine, use only Wacker Neuson replacement parts or those parts equivalent to the original in all types of specifications, such as physical dimensions, type, strength, and material.
When lifting the machine:
Make sure slings, chains, hooks, ramps, jacks, and other types of lifting devices are attached securely and have enough weight-bearing capacity to lift or hold the machine safely. See chapter Technical Data.
Remain aware of the location of other people when lifting the machine.
Make sure the transporting vehicle has sufficient load capacity and platform size to safely transport the machine. See chapter Technical Data .
To reduce the possibility of injury:
Do not stand under the machine while it is being lifted or moved.
Do not get onto the machine while it is being lifted or moved.
ALWAYS support the machine securely before changing blades.
DO NOT remove blades while the machine is hanging overhead.
When cleaning and servicing the machine:
Keep the machine clean and free of debris such as leaves, paper, cartons, etc.
Keep the labels legible.
When cleaning the machine:
Do not clean the machine while it is running.
Never use gasoline or other types of fuels or flammable solvents to clean the machine. Fumes from fuels and solvents can become explosive.
ALWAYS follow instructions when disconnecting fuel lines. Failure to do so may result in fuel squirting from fuel system.
Do not crank a flooded engine with the spark plug removed on gasoline-powered engines. Fuel trapped in the cylinder will squirt out the spark plug opening.
Do not test for spark on gasoline-powered engines if the engine is flooded or the smell of gasoline is present. A stray spark could ignite the fumes.
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Labels
2 Labels
2.1
Label Locations
BFS 2020AS
F
D
U
X
B A
W
G
J S K L M N
H
C
P Q R
O
U
E
T
14
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BFS 2020AS
2.2
Label Meanings
Labels
The labels contain important safety and operating information. Please read them carefully. These labels are considered a permanent part of your saw.
If a label comes off or becomes hard to read, contact Wacker Neuson or your dealer for replacement.
A WARNING!
Replace blade and guard after blade failure.
Read the Operator’s Manual.
B
C
D
E
WARNING!
Cutting hazard. Keep hands and feet away from moving blade.
WARNING!
Hot surface
DANGER!
Asphyxiation hazard.
Engines emit carbon monoxide.
Do not run the machine indoors or in an enclosed area unless adequate ventilation, through such items as exhaust fans or hoses, is provided.
Read the Operator’s Manual. No sparks, flames, or burning objects near the machine. Stop the engine before refueling.
WARNING!
Hand injury if entangled in moving belt.
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Labels
F
G
H
J
K
L
M
16
BFS 2020AS
NOTICE
Lifting point.
WARNING!
Not a lifting point.
CAUTION!
Wear personal protective equipment while operating this machine.
Hearing protection
Eye protection
Hard hat
Dust mask
Forward / reverse speed control
F = Forward
N = Neutral
R = Reverse
Turtle = Idle/slow engine speed
Rabbit = Full/fast engine speed
Raise the blade
Lower the blade
Read the Operator’s Manual
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BFS 2020AS
N
Labels
O
Starting sequence
1. Turn on the water spray.
2. Place the forward / reverse control in neutral.
3. Disengage the transmission.
4. Start the engine.
5. Engage the transmission.
6. Move the forward / reverse control forward to increase forward travel speed.
7. Place the forward / reverse control in the fully-forward (“F”) position.
Pre-starting checklist
Check engine oil level
Check water tank level
Check belt tension
Check engine oil level
P
Q
Water control valve
Rotate lever to horizontal position to start water flow
Rotate lever to vertical position to stop water flow.
Engage transmission
R
S
Disengage transmission
Engine switch
Off O = stop
On I = run
Start wc_si000606gb.fm
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Labels
T
BFS 2020AS
U
WARNING!
Read the Repair Manual before servicing this machine.
Stop the engine and disconnect spark plug before servicing.
Cutting / entanglement hazards.
NOTICE
Overtensioning of belts will result in premature crank and/or bearing failure. Belts should slip before engine stalls.
V
W
X
WARNING!
Read and understand the supplied Operator’s
Manual before operating this machine. Failure to do so increases the risk of injury to yourself or others.
A nameplate listing the model number, item number, revision number, and serial number is attached to each unit. Please record the information found on this nameplate so it will be available should the nameplate become lost or damaged. When ordering parts or requesting service information, you will always be asked to specify the model number, item number, revision number, and serial number of the unit.
Emission Control Information
This equipment meets U.S. EPA EVAP standards.
Evaporative Family: CWIXNHEQCL2
Exempt from tank permeation standards under 40 CFR 1054.145.
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BFS2020AS
3 Initial Setup
Initial Setup
3.1
Preparing the Machine for First Use
Preparing for first use
To prepare your machine for first use:
1. Make sure all loose packaging materials have been removed from the machine.
2. Check the machine and its components for damage. If there is visible damage, do not operate the machine! Contact your Wacker Neuson dealer immediately for assistance.
3. Take inventory of all items included with the machine and verify that all loose components and fasteners are accounted for.
4. Attach component parts not already attached.
5. Add fluids as needed and applicable, including fuel, engine oil, and battery acid.
6. Move the machine to its operating location.
Machine setup
The saw has been thoroughly inspected and test operated before shipping and should not require any additional adjustments prior to use.
CONTENTS OF CARTON: saw, fasteners, handlebars, pointer assembly, wrench, engine manual, and Operator’s Manual.
Make sure that all items packaged in the carton are accounted for and in good visual condition before discarding any packing materials. If there are any missing or damaged parts, call Wacker Neuson Product Support at our toll free number: 1-
(800) 770-0957 for instructions before proceeding further.
WARNING
Personal injury / equipment damage hazards.
f For your own safety, never start the engine until all assembly steps are complete.
Read and familiarize yourself with all controls and features of this saw as shown in
Features and Controls before beginning operations. (Descriptions and illustrations are as accurate as possible at the time of publication. Illustrations may include optional equipment or accessories and may not show all models covered by this literature).
Preparing the engine
The engine must be thoroughly lubricated, and filled with fuel prior to break-in or use. Refer to the engine manufacturer’s instructions for engine servicing details.
The Maintenance chapter of this Manual describes the required periodic maintenance required under normal use.
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Initial Setup
3.2
Installing the Handlebar and Pointer
BFS2020AS
The handlebar and pointer assemblies are shipped loose in the carton and must be attached to the main saw frame. Mounting hardware for these components (3/8-16 bolts, washers, and nuts) can be found in the plastic tube containing the Operator’s
Manual. Mounting hardware may also be pre-installed on the machine
Procedure Perform the procedure below to install the handlebar (1) and pointer assembly (2) .
1. Remove the saw from the carton and pallet.
2. Insert the handlebar tubes (1a) through the mounting holes (3) at the rear of the main saw frame. Use the provided hardware to fasten the handlebar to the main saw frame.
3. Attach the pointer assembly to the front of the machine as shown.
1
3
1a
3
1a
2
20
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BFS2020AS
3.3
Recommended Fuel
Type
Initial Setup
This engine/equipment requires regular unleaded gasoline. f Use only fresh (no older than three months old), clean gasoline. f Use a fuel stabilizer per the fuel stabilizer manufacturer’s instructions.
Use of oxygenated fuels
Some conventional gasolines are blended with alcohol. These gasolines are collectively referred to as oxygenated fuels. If you use an oxygenated fuel, be sure it is unleaded and meets the minimum octane rating requirement.
Before using an oxygenated fuel, confirm the fuel’s contents. Some states / provinces require this information to be posted on the fuel pump.
The following are Wacker Neuson approved percentages of oxygenates:
ETHANOL - (ethyl or grain alcohol) 10% by volume. You may use gasoline containing up to 10% ethanol by volume (commonly referred to as E10). Gasoline containing more than 10% ethanol (such as E15, E20, or E85) may not be used because it could damage the engine.
If you notice any undesirable operating symptoms, try another service station or switch to another brand of gasoline.
Fuel system damage or performance problems resulting from the use of an oxygenated fuel containing more than the percentages of oxygenates mentioned above are not covered under warranty.
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Initial Setup
3.4
Refueling the Machine
Requirements
Machine shut down
Engine cool
Machine/fuel tank level with the ground
Fresh, clean fuel supply
Procedure
BFS2020AS
Perform the procedure below to refuel the machine.
WARNING
Fire hazard. Fuel and its vapors are extremely flammable. Burning fuel can cause severe burns.
f Keep all sources of ignition away from the machine while refueling.
f Do not refuel if the machine is positioned in a truck fitted with a plastic bed liner.
Static electricity can ignite the fuel or fuel vapors.
f Refuel only when the machine is outdoors.
f Clean up spilled fuel immediately.
1. Remove the fuel cap (a) .
a b
Result wc_gr009136
2. Fill the fuel tank to the bottom of the fuel tank neck (b) .
CAUTION
Fire and health hazard. Fuel expands when heated. Expanding fuel in an over-filled tank can lead to spills and leaks.
f Do not overfill the fuel tank.
3. Reinstall the fuel cap.
The procedure to refuel the machine is now complete.
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BFS2020AS
3.5
Preparing the Engine
Add Oil
Initial Setup
NOTICE: The engine is not shipped with oil in the crankcase. Before starting the machine, fill the crankcase with approved oil to the apppropriate level.
To fill the crankcase with oil, place the engine on level ground. In order for this to be accomplished the blade must not be installed, and the depth adjustment must be down (until the engine is level).
Refer to Technical Data for details on the type and amount of oil required.
Since the proper amount of oil is important for safe operation, check the oil level of the engine each time you put fuel in the gas tank. Remember that the engine and oil must be warm and your saw must be on level ground to get an accurate reading.
In the event of a fuel spill, do not attempt to start the engine until the spilled fuel has been wiped up and the area is completely dry.
When filling the fuel tank do not overfill. Always leave enough area for expansion due to environmental heating. wc_tx003069gb.fm
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Initial Setup
3.6
Checking the Hydrostatic Transmission
BFS2020AS
The hydrostatic transmission is factory-filled with fluid having a viscosity equivalent to SAE 20 W 20. The expansion tank (a) is located behind the battery (b) at the rear of the console.
a c a b wc_gr009137
1. Check the full level line (c) on the expansion tank to ensure that the transmission fluid level is sufficient. The full level line is near the bottom of the expansion tank.
2. If the transmission fluid level is low, remove the belt guard from the machine and add fluid to the expansion tank. (See “Setting the V-Belt Tension” for instructions on removing the belt guard.)
NOTICE: Do not overfill the expansion tank. Overfilling will result in ruptured seals on the hydrostatic transmission and subsequent mechanical damage.
24
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BFS2020AS
3.7
Mounting the Blade
Procedure
Initial Setup
Follow the procedure below to mount the blade.
1. Locate the directional arrow on the blade. Orient the blade so that it will rotate clockwise when viewed from the right side of the saw.
c b a d wc_gr009138
2. Fit the blade over the blade shaft (a) and drive pin. The drive pin must project through the hole in the blade and into the flange (b) for proper performance.
3. Tighten the blade shaft nut (c) securely against the outside of the flange.
Note: Blade shaft threads are left-hand on the right side of the saw, and right-hand on the left side of the saw.
WARNING
Pinching / cutting hazards.
f Operate the saw only while the blade guard (d) is covering the blade.
f Do not operate the saw with the front of the blade guard raised. f Ensure that blade exposure does not exceed 180 degrees during operation.
WARNING
Operating this machine with an incorrect saw blade can injure or kill! f Use only diamond saw blades on this machine. As defined by ANSI B7.1, diamond saw blades are intended to cut construction materials such as concrete, asphalt, masonry block, brick, ceramic tiles, and stone.
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Initial Setup
3.8
Aligning the Front Pointer
Overview
BFS2020AS
The front pointer is aligned at the factory. Check for proper alignment with the blade after every use.
Procedure Perform the procedure below to align the pointer.
1. Using a straight edge, carefully mark a line (a) 3.6 m (12 ft) long on a smooth, level concrete surface.
Result
152 mm
(6 in.) b c a 3.6 m (12 ft) wc_gr008283
2. Place the saw parallel to the line. Lower the blade (b) and center it over the line.
3. With the blade centered over the line and the saw frame parallel to the line, lower the front pointer assembly and position the pointer (c) over the line.
4. Roll the saw along the entire length of the line. The saw should drift no more than 152 mm (6 in.) to the left in 3.6 m (12 ft) of forward travel. Adjust the pointer in or out if the saw drifts outside this parameter.
The pointer is now aligned.
26
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BFS 2020AS
4 Operation
4.1
Features and Controls
Control locations
All controls for saw operation are located on the console.
b a d f m c
Operation h j k e l n wc_gr009139 a b c k f h j
Control
Raise / lower wheel
Digital tachometer / hourmeter
Throttle d Forward / reverse and speed control e Transmission engage
/ disengage lever
Engine on/off/start keyed switch
Depth gauge
Hose bibb
Water valve l Pump on-off switch
(optional) m Blade wrench n Choke
Description
Raises the blade when rotated clockwise. Lowers the blade when rotated counterclockwise.
Displays engine RPM while the engine is running.
When engine is stopped, displays run time in minutes
(through the first hour of operation) and then in hours.
Increases engine speed from slow (idle) at the “turtle" position to fast (full RPM) at the “rabbit" position.
Gradually increases saw travel speed (“F" for forward, “R" for reverse) when moved from the central neutral “N" position.
Engages transmission when moved to the lowest position.
Disengages transmission when moved to the highest position.
Stops the engine when the key is rotated to the O (off) position.
Activates the electric starter when the key is rotated to the
START position.
Displays the depth of cut in inches and millimeters.
Connection point for water supply.
Controls the flow of water to the blade.
—
—
Controls the air/fuel mixture supplied to the carburetor.
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Operation
4.2
General Sequence of Operation
BFS 2020AS
Following is the general sequence of steps required to operate the saw.
1. Place the forward / reverse control in neutral (N).
2. Place the throttle halfway between the slow (turtle) and fast (rabbit) positions.
3. Disengage the transmission.
4. Start the engine.
5. Engage the transmission.
6. Move the throttle to the fast position.
7. If wet cutting, open the water valve to start water flow.
8. Lower the blade and set the depth of cut.
9. Move the forward / reverse control slowly to the forward (F) position until proper cutting speed is reached.
10.Make the cut.
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BFS 2020AS
4.3
Before Starting
Operation
Pre-start checklist
Starting procedure
DANGER
Asphyxiation hazard. Engine exhaust contains carbon monoxide, a deadly poison.
f Do not operate this equipment in enclosed areas unless adequate ventilation, such as hoses or fans, is provided.
Identify and locate any subsurface features which may be hazardous or could damage the equipment (for example, electrical cable or natural gas lines.). Do not use the machine if concealed hazards exist.
Refer to the engine manual for proper engine operation. Take the special precautions described during the break-in period as specified by the engine manual.
Check engine oil level. Add oil if level is low.
Check fuel levels. Add fuel if level is low.
Check cooling air intake and external surfaces of engine. Make sure they are clean and unobstructed.
Check that the air cleaner components and all shrouds, equipment covers, and guards are in place and securely fastened.
Inspect the blade. Replace if damaged.
Perform the procedure below to start the engine.
1. Choke the engine as required for cold starting.
2. Set the throttle control halfway between the slow and fast positions.
3. Disengage the transmission.
4. Rotate the engine switch to the START position.
5. Allow engine to warm up for a few minutes at half throttle.
6. Open the choke when the engine is running smoothly.
7. Set the engine speed to the correct RPM. Refer to Blade Speed and Throttle
Setting .
The machine is now operating and ready for use.
Result
4.4
Stopping the Machine
Procedure Perform the procedure below to stop the engine.
1. Move the throttle to the slow position.
2. Rotate the engine switch to the O (off) position.
3. Wait for all engine and blade movement to stop.
4. Disengage the transmission.
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29
Operation
4.5
Maneuvering the Saw
BFS 2020AS
WARNING
Cutting / injury hazard. The blade is spinning whenever the engine is running.
f Avoid the blade at all times while operating and maneuvering the saw.
Maintaining travel speed
NOTICE: Raise the blade as high as possible when maneuvering so that the blade will not strike the pavement.
The forward / reverse control (d) is adjusted at the factory to provide approximately
12.2 m/min (40 ft/min) maximum in forward, and 6.1 m/min (20 ft/min) maximum in reverse, with the engine running at full throttle.
d e wc_gr009140
When maneuvering, the engine needs to be at one-half throttle or more so that the hydrostatic transmission can operate efficiently.
Operating the transmission
The forward / reverse control governs the variable forward and reverse ground speed of the saw.
When the forward / reverse control is in neutral (“N") and the transmission engage / disengage lever (e) is in the lower (engaged) position, the transmission is in neutral and the wheels are locked.
Note: When engaging the transmission, be sure the forward / reverse control is at the neutral position to avoid saw movement. f To engage the transmission, push the transmission lever down. f To disengage the transmission, pull the transmission lever up. f When the saw is manually pushed, the transmission must be disengaged.
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30
BFS 2020AS
4.6
Aligning the Saw with a Marked Line
Requirements
Saw pointer properly aligned. See topic Front Pointer Alignment .
Engine stopped
Operation
Procedure Before making a cut, perform the following procedure to align the saw with a marked cutting line.
1. Push the saw forward and approach the marked line at an angle.
Result
A
B wc_gr008286
2. Stop when the distance from the rear edge of the saw frame to the line (distance
A) and the distance from the pointer to the line (distance B) are approximately equal.
3. Lift the rear wheels slightly off the ground by lifting on the handles and swing the rear of the saw around until the pointer is on the line and the saw frame is parallel to it.
Note: To keep the blade from contacting the concrete, do not tilt the saw too far forward.
The saw is now aligned with the marked line.
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31
Operation
4.7
Dry Cutting
BFS 2020AS
Requirements Ensure that the blade you are using is clearly marked for dry cutting. Thinner diamond blades are especially advantageous when cutting dry.
Making a cut Follow the procedure below to make a dry cut.
1. Start the engine.
2. Increase the engine speed to the proper throttle setting.
3. Lower the blade into the cut by slowly rotating the depth control wheel clockwise.
NOTICE: If the saw should stall for any reason, raise the blade out of the cut and make sure that the blade shaft nut is tight before restarting the engine
Controlling depth of cut
Finishing a cut
Maintaining air flow
Saw only as deep as the specifications and job conditions require. Cutting too deep with one pass, or exerting excessive forward or side pressure can be hazardous.
Step cut in increments of 50 mm (2 in.) or less for the best results.
1. Raise the blade out of the cut by cranking the depth control wheel counterclockwise. Raise the blade high enough out of the cut to clear the pavement and allow maneuvering of the saw.
2. Move the engine throttle to the slow position.
3. Stop the engine.
When dry cutting, it is important to keep the air filter clean. Concrete dust is very abrasive, and will quickly damage internal engine parts, causing loss of compression and eventual engine failure. Unobstructed air flow also helps to cool the blade during dry cutting.
Check the condition of the air filter at least every four (4) hours of operation.
Clean the pre-filter (wash in soapy water and re-oil) and change the paper filter as soon as it becomes clogged.
Cutting safety
During cutting, do not exert excessive side pressure on the handle bars to attempt to steer the saw. Use only enough pressure to follow the original marked line.
When lowering the blade into a partially made cut, the blade must be perfectly aligned within the cut before starting to saw again. DO NOT force the blade into the material by lowering the blade too fast.
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BFS 2020AS
4.8
Wet Cutting
Overview
Operation
A continuous supply of water to the blade during wet cutting operations provides:
cooling of the blade flushing of the cut
CAUTION
Concrete / asphalt slurry can cause serious skin irritation.
f Avoid skin contact with concrete / asphalt slurry while performing wet cutting operations.
Setting up the machine
Follow the procedure below to set up the machine for wet cutting.
j k wc_gr009141
1. Connect the water supply to the hose bibb (j) .
2. After connecting the water supply, turn on the water at the source and use the water valve (k) to control the flow of water to the blade.
3. Verify that both sides of the blade are getting adequate flow of water. If not, increase the flow of water, or stop the saw and check for obstructions in the water supply.
Proceed with the cutting operation.
Making a cut 1. Start the engine.
2. Increase the engine speed to the appropriate setting for the blade diameter. See
Blade Speed and Throttle Setting.
3. Lower the blade into the cut by slowly rotating the depth control wheel clockwise.
NOTICE: If the water supply is interrupted, stop cutting immediately.
This procedure continues on the next page.
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33
Operation BFS 2020AS
Finishing a cut
Continued from the previous page.
1. Raise the blade out of the cut by cranking the depth control wheel counterclockwise. Raise the blade high enough out of the cut to clear the pavement and allow maneuvering of the saw.
2. Move the engine throttle to the slow position.
3. Stop the engine.
4. Turn off the water valve.
Cutting safety
During cutting, do not exert excessive side pressure on the handle bars to attempt to steer the saw. Use only enough pressure to follow the original marked line.
When lowering the blade into a partially made cut, the blade must be perfectly aligned within the cut before starting to saw again. DO NOT force the blade into the material by lowering the blade too fast.
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BFS 2020AS
4.9
Cutting Guidelines
Requirements
Water supply connected and flowing (if applicable)
Engine at the correct throttle setting
Blade lowered
Operation
Cutting a straight line
Perform the procedure below to cut a straight line.
1. Push the saw forward referring to the pointer alignment.
2. The saw has a natural tendency to pull towards the side on which the blade is mounted. To assure straight line cutting, apply pressure to the appropriate handle.
3. If excessive pressure is required, reduce the forward speed of the saw.
If excessive pressure is still required to make the saw travel straight, the saw may need to have the arbor shaft adjusted. Contact Wacker Neuson Product Support for assistance.
Cutting safety
Avoid sudden corrective actions when the saw deviates from the intended line of cutting. Sudden and severe corrections can cause the blade to be damaged or broken.
NOTICE: If the saw should stall for any reason, raise the blade out of the cut by slowly rotating the raise / lower wheel counterclockwise. Make sure that the blade shaft nut is tight before restarting the engine.
Always raise the blade completely out of the cut before stopping the engine or turning off the water supply.
When sawing joints, be careful not to let the blade cut into the forms.
The forward speed of the saw, during cutting, should be regulated by the operator. Moving the saw too fast while cutting may cause the front wheels to lift causing the blade to cut at uneven depths.
Cutting economy
The three controlling factors of cutting economy are:
Depth of cut
Forward speed of the saw
Blade cutting ability
Experimental adjustment of these factors, with respect to the specific concrete aggregate being cut, will result in the best cutting economy. As new blades wear, the cutting ability usually improves. It is best to start at a slow forward speed with a new blade and work up to a desired cutting speed gradually. wc_tx003070gb.fm
35
Operation
4.10
Blade Speed and Throttle Setting
Overview
BFS 2020AS
Since diamond blades cut best at specific speeds, blades of different diameters must rotate at different blade shaft rpms.
The Wacker Neuson BFS-2020AS will run a 16” to 20” blade. Safe, efficient, and economical cutting performance will occur at the engine rpm (as read on the tachometer) stipulated on the chart below.
Blade
Diameter
16 ”
18 ”
20”
Engine RPM Setting
3200–full throttle
2850–3300
2550–3000
The Wacker Neuson BFS-Series engine shaft to blade shaft ratio is 1 to 0.89.
WARNING
Operating saw blades at rotational speeds greater than those recommended by the manufacturer can damage blades and cause personal injury.
f Do not exceed 3500 engine rpm.
4.11
Cutting with the Blade on the Left Side
Overview Left side cutting can be accomplished by moving the blade guard to the left hand side of the saw belt guard.
Procedure Follow the procedure below to convert the saw to left-side cutting.
1. Stop the engine.
2. Disconnect the water hose from the blade guard.
3. Remove the shaft guard from the left side of the saw frame and set aside.
4. Remove the blade guard from the right side of the saw frame and reinstall on the left side of the saw belt guard.
5. Reinstall the shaft guard on the right side of the saw frame.
6. Reconnect the water hose to the blade guard.
Attaching the blade
When attaching a blade to the left blade shaft, use the outside flange from the right side and the left side nut.
Note: Blade shaft threads are left-hand on the right side of the saw, and right-hand on the left side of the saw.
General safety
Do not operate the saw with any guards removed.
Stop the engine and remove the key (if applicable) to avoid accidental starts when removing guards.
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BFS 2020AS
5 Maintenance
Maintenance
5.1
Maintaining the Emission Control System
Normal maintenance, replacement or repair of emission control devices and systems may be performed by any repair establishment or individual; however, warranty repairs must be performed by a dealer/service center authorized by the engine manufacturer. See the supplied engine owner’s manual for the applicable emission warranty information.
5.2
Periodic Maintenance Schedule
Periodic maintenance including cleaning, lubrication, tensioning of drive belts, and inspection for wear and damage are routine servicing procedures. Periodic maintenance can prevent serious damage or malfunctioning of the machine and aid in preserving the useful life of saw blades.
The table below lists basic machine maintenance. Tasks designated with check marks may be performed by the operator. Tasks designated with square bullet points require special training and equipment.
Task
Every 4 hours or after use
Every 8 hours or daily
Every 25 hours or weekly
Every 100 hours or seasonally
Check the air filter (when dry cutting).
3
Inspect the blade.
3
Lubricate blade shaft bearings.
Check the hydrostatic transmission oil level and refill if necessary.
Lubricate chain drive.
Lubricate friction drive wheel bearings.
Check and adjust transmission control assemblies.
Check battery condition and terminal connections.
Check condition of V-belts.
3
3
Check battery water level and refill if necessary.
Adjust chain drive tension.
Replace V-belts.
Change the air filter.*
Maintain the engine.
3
Consult the Honda engine manual.
* Service more often in dirty or dusty conditions (for example, if dry cutting) wc_tx003071gb.fm
37
Maintenance
5.3
Before Servicing
Shut off the engine before performing any maintenance.
BFS 2020AS
DANGER
Exhaust gas from the engine contains carbon monoxide, a deadly poison.
Exposure to carbon monoxide can kill you in minutes.
f Never run the engine inside an enclosed area, even for a short testing period after performing maintenance work, unless adequate ventilation is provided through such items as exhaust fans or hoses.
5.4
Cleaning the Machine
Clean the machine daily, being careful to remove cutting dust and slurry from the blade guard, engine cooling fan, and air ducts. Failure to perform this operation may prevent smooth control of the saw.
Pressure washing is the preferred method of cleaning the machine.
NOTICE: Avoid spraying pressurized water directly onto the controls and gauges.
5.5
Maintaining the Engine
Engine maintenance and adjustment is necessary to keep the saw in good operating condition. Maintenance operations include oil changes, filter changes, air cleaner, spark plug, fuel filter, etc. Perform all maintenance procedures as recommended by the Honda engine manual provided separately.
38
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BFS 2020AS
5.6
Inspecting the Blade
When
Maintenance
Inspect the blade daily before using the saw, and after every four hours of use.
WARNING
Damaged blades can shatter unexpectedly, causing severe injury.
f Never use a blade that has any of the fault conditions described in the list below.
Fault conditions
The following are fault conditions to look for when inspecting a blade. If any of these fault conditions exist, discard the blade immediately and replace it with a new one.
Missing segment(s)
Cracked segment(s)
Warped blade core
Discolored blade core (dark blue)
Wobbling blade
Blade core crack(s)
Blade core undercutting
Out-of-round blade wear
Out-of-round arbor wear
Dull blade wc_tx003071gb.fm
39
Maintenance
5.7
Changing the Engine Oil
When
BFS 2020AS
For a new engine, it is especially important to change the oil after the first 5 hours of operation. Thereafter, change the oil after every 100 hours of operation as per the engine owner’s manual.
Requirements
Engine is stopped, but still warm
Machine is on a level surface
Fresh engine oil (see Technical Data f or quantity and type)
Plastic cloth and a container of sufficient volume to collect drained oil
Note: Collect, store and dispose of drained oil in accordance with current environmental protection regulations.
WARNING
Burn hazard. Engine and exhaust pipe become extremely hot during operation.
f Stop the engine and allow the machine to cool before changing the engine oil.
Changing the engine oil
Perform the procedure below to change the engine oil.
1. Place a plastic cloth and a collection container beneath the machine.
2. Unscrew and remove the oil filler cap (a) from the oil fill port (b) .
3. Remove the dipstick (c) and wipe it clean with a dry cloth.
a b c e f d
4. The oil drain hose (d) is located at the base of the engine at the front of the machine.
Remove the hose cap and drain the oil into a suitable container.
5. Reinstall the hose cap and store the hose in the retainer.
wc_gr009142
6. Reinstall the dipstick. Add new engine oil so that the level falls between the maximum and minimum fill limits (e, f) on the dipstick.
7. When the proper oil level has been reached, reinstall the oil filler cap.
WARNING
Most used oil contains small amounts of materials that can cause cancer and other health problems if inhaled, ingested, or left in contact with skin for prolonged periods of time.
f Take steps to avoid inhaling or ingesting used engine oil. f Wash skin thoroughly after exposure to used engine oil.
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40
BFS 2020AS
5.8
Lubricating the Grease Points
When
Maintenance
There are seven (7) grease points (zerk fittings) on the machine.
The two blade shaft bearing grease points need to be serviced at the end of operations on a daily basis. The other grease points require service on a weekly basis. See Periodic Maintenance . Use a good standard bearing grease.
b c a a b d c d
Locations wc_gr009143
1. Two blade shaft grease points (a) are accessed from underneath by tilting the saw back.
2. The grease point (b) , supplying the raise/lower adjustment tube, is accessed by removing the rear panel from the tower control box.
3. Two transmission drive spline shaft bearings (c) are also accessed by removing the rear panel from the tower control box.
4. Two grease points (d) are located on the outside surfaces of the rear wheels.
5.9
Maintaining the Controls
CAUTION
Possible loss of machine control. f Stiff or sluggish response of controls must be corrected immediately.
wc_tx003071gb.fm
Periodically clean and lubricate the throttle cable, the throttle, and choke control.
The frequency of this maintenance will depend on the utilization rate and the amount of dust.
After performing any maintenance on controls, check the saw responsiveness before initiating sawing operations.
41
Maintenance
5.10
Checking the Hydrostatic Transmission
BFS 2020AS
The hydrostatic transmission should not normally require maintenance. However, check the hydraulic oil level (c) in the reservoir (a) and the condition of the cooling fan blades every 8 hours or daily.
a c wc_gr008402
5.11
Adjusting and Maintaining the Drive Chain
Excessive tension on the drive chain will reduce chain life. A broken drive chain will result in the loss of braking friction through the drive wheels.
Adjusting the drive chain tension
Perform the procedure below to adjust the drive chain tension.
1. Loosen the four transmission bracket mounting bolts (a) .
a b c
Result
Maintaining the drive chain wc_gr008389
2. Move the transmission (b) up or down as required to adjust the tension on the chain (c) .
3. Retighten the mounting bolts.
The drive chain has now been adjusted.
f Periodically wipe the chain clean and relubricate with penetrating chain lubricant. f Perform daily checks of the drive chain. If any damage is noted, the chain must be replaced.
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BFS 2020AS
5.12
Adjusting the Friction Drive Wheels
Maintenance
If the friction drive wheels do not engage the rear wheels with sufficient pressure, slippage of the rear wheels may occur.
Procedure Perform the procedure below to adjust the friction drive wheels.
1. Loosen the two (2) linkage adjustment bolts (a).
a b wc_gr009144
2. Lengthen the linkage bars in small increments until the friction drive wheels (b) engage the rear wheels without slipping.
3. Retighten the adjustment bolts.
Result The friction drive wheels are now adjusted.
5.13
Cleaning and Lubricating the Depth Control
Description The depth control (raising screw) consists of a threaded rod (a) which feeds into a steel nut (b) . In order to keep the two parts working smoothly, the rod must be kept clean and the screw threads lubricated.
a b wc_tx003071gb.fm
wc_gr009145 f Clean the threaded rod with a rag after each use. This will prevent sludge from collecting in the tube assembly and protect the threads. f Keep the raising screw threads lubricated. Dust and slurry generated during cutting will cause unlubricated screw threads to wear prematurely.
43
Maintenance
5.14
Checking the Water System
When Check and clean the water system before each use.
BFS 2020AS f Make sure the outlet (a) in the blade guard water tube (b) is open. Clean if necessary.
f Check the water valve (c) for proper operation.
a c b wc_gr009146
NOTICE: When storing the saw under freezing conditions, drain the water lines to prevent damage.
44
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BFS 2020AS
5.15
Setting the V-Belt Tension
Overview
Maintenance
This machine is equipped with four heavy duty V-belts which are tensioned at the factory. The belts must be re-tensioned after the first half day of operation and periodically thereafter.
Maintain the proper belt tension as set at the factory, which is approximately 6 mm
(1/4 in.) of deflection of the center of the belt, halfway between the pulley on the motor and the pulley on the blade shaft.
WARNING
Pinching / crushing hazards.
f Stop the engine before setting the V-belt tension.
f Never adjust the belt tension while the engine is running.
Procedure
NOTICE: Make sure that the belt tension is correct before operating the machine.
Over-tensioning can damage the belts and bearings. Belts that are too loose may slip, resulting in shortened belt life and loss of power to the blade shaft.
Replace all four belts even if just one is worn or damaged.
Perform the procedure below to access the V-belts (c) and adjust belt tension.
1. Remove the three mounting bolts (a1, a2, a3) and the belt guard (b) .
Note: Bolt (a2) is located on the back side of the belt guard.
a3 c a1 a2 b d
6 mm
(1/4 in.) wc gr009147 wc_tx003071gb.fm
This procedure continues on the next page.
45
Maintenance BFS 2020AS
Continued from the previous page.
2. Measure the amount of belt deflection.
3. If the amount of deflection is greater than or less than 6 mm (1/4 in.), adjust the belt tension. To adjust the belt tension, tighten or loosen the motor tension bolt
(d) at the front of the engine. a. Tightening the tension bolt (rotating it clockwise) raises the engine platform.
This increases belt tension.
b. Loosening the tension bolt (rotating it counter-clockwise) lowers the engine platform. This decreases belt tension.
4. Reinstall the belt guard after adjusting the belt tension.
Result The belt tension has now been adjusted.
5.16
Checking for Misalignment
The two most common types of misalignment are shown in the drawings below.
Use a steel straight edge (a) to check the alignment. A visible gap between the straight edge and the saw indicates misalignment.
a b a c
1 2
wc_gr008287
Figure 1 —The engine drive shaft (b) and the blade shaft (c) are not parallel.
Figure 2 - The pulleys are not located properly on the shafts.
The motor mounting plate must be maintained parallel to the frame. Make sure all lock nuts are tightened and retighten the bracket bolts.
46
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BFS 2020AS
5.17
Maintaining the Battery
Location
Maintenance
The battery is located inside the battery box (a) . The battery box is located behind the access panel at the rear of the machine.
b a c
Removing the battery wc_gr009167
The battery must be disconnected before certain maintenance procedures can be performed. It is difficult (but not impossible) to disconnect or connect the cables while the battery is inside the battery box. For easier access, remove the battery for maintenance.
1. Move the transmission engage/disengage lever (b) up to the disengage position.
2. Remove the clevis pin and hairpin cotter from the base of the drive adjustment arm (c) .
3. Move the drive adjustment arm away from the battery box.
4. Remove the nylon strap and open the battery box.
5. Slide the battery out of the battery box.
6. Disconnect the cables as described below.
WARNING
Explosion hazard. Batteries can emit explosive hydrogen gas.
f Keep all sparks and flames away from the battery.
f Do not short-circuit battery posts.
f Do not touch the machine frame or the negative battery terminal when working on the positive terminal.
WARNING
Battery acid is poisonous and corrosive.
f In the event of ingestion or contact with skin or eyes, seek medical attention immediately.
This procedure continues on the next page.
wc_tx003071gb.fm
47
Maintenance BFS 2020AS
Continued from the previous page.
Disconnecting the battery
Perform the procedure below to disconnect the battery.
1. Stop the machine and shut down the engine.
2. Place all electrical switches in the OFF position.
3. Disconnect the negative (–) battery cable from the battery (1) .
4. Disconnect the positive (+) battery cable from the battery (2) .
Connecting the battery
Perform the procedure below to connect the battery.
1. Connect the positive (+) battery cable to the battery (3).
2. Connect the negative (–) battery cable to the battery (4).
Maintenance
Inspect the battery periodically. Keep the battery terminals clean and connections tight.
When necessary, tighten the cables and grease the cable clamps with petroleum jelly.
Maintain the battery at full charge to improve cold weather starting.
NOTICE Observe the following to prevent serious damage to the machine’s electrical system:
Never disconnect the battery with the machine running.
Never attempt to run the machine without a battery.
In the event that the machine has a discharged battery, either replace the battery with a fully charged battery or charge the battery using an appropriate battery charger.
Note: Dispose of waste batteries in accordance with local environmental regulations.
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BFS 2020AS
5.18
Replacing the Fuse
Overview
Maintenance
A 30-ampere fuse protects the electric starter relay and the battery charging circuit.
If the fuse burns out, the electric starter will not operate.The fuse and the battery are the only user-serviceable parts of the electrical system.
Location The fuse is located inside the engine on/off switch housing (a) . b a
Procedure wc_gr009148
Perform the procedure below to replace the fuse.
1. Remove the rear access panel.
2. Remove the two screws (b) that fasten the engine on/off switch to the control panel.
3. Lower the engine on/off switch housing through the control panel and pull it to the rear of the saw.
4. Remove the screw on the engine on/off switch housing, and remove the cover to access the fuse.
5. Replace the fuse with one of the equivalent type and rating.
NOTICE: A short circuit or a battery connected in reverse polarity will blow the fuse. If the fuse blows, determine the cause of the problem before resuming operation. wc_tx003071gb.fm
49
Troubleshooting
6 Troubleshooting
BFS 2020AS
Refer to the table below for problems and their possible causes. Contact Wacker
Neuson Product Support for assistance if these troubleshooting remedies do not solve the problem.
Problem
Transmission is jerky when starting the machine
Transmission operates in only one direction
Transmission is hot while machine is operating
Cause
Loose transmission linkage
Improper oil level
Loose drive chain
Loose transmission linkage
Loose transmission linkage
Improper oil level
Remedy
Tighten transmission linkage.
Check oil and add if necessary.
Tighten drive chain.
Tighten transmission linkage.
Tighten transmission linkage.
Malfunctioning cooling fan
Dirty cooling fan / air intake
Engine oil is black Malfunctioning cooling fan
Dirty cooling fan / air intake
Engine oil is milky Water in oil reservoir
Engine does not start
No fuel
Dirt in fuel line
Engine is difficult to start
Fuse burned out
Dirty air filter
Faulty spark plug
Faulty starter
Discharged battery
No fuel
Improper fuel
Dirt in fuel line
Dirty air filter
Faulty spark plug
Faulty starter
Discharged battery
Check oil level and add if necessary.
Repair or replace fan.
Clean debris from fan or air intake.
Repair or replace fan.
Clean debris from fan or air intake.
Replace engine oil.
Add fuel.
Drain fuel tank and carburetor; add fresh fuel.
Replace fuse.
Clean air filter.
Check / replace spark plug.
Repair or replace starter.
Charge or replace battery.
Add fuel.
Drain fuel tank and carburetor; add correct fuel.
Drain fuel tank and carburetor; add fresh fuel.
Clean air filter.
Check / replace spark plug.
Repair or replace starter.
Charge or replace battery.
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BFS 2020AS Troubleshooting
Problem
Engine stops suddenly
Engine lacks power
Engine operates erratically
Cause
No fuel
Dirt in fuel line
Incorrect oil level
Dirty air filter
Improper fuel
Dirt in fuel line
Incorrect oil level
Dirty air filter
Faulty spark plug
Improper fuel
Dirt in fuel line
Remedy
Add fuel.
Drain fuel tank and carburetor; add fresh fuel.
Check oil level and add if necessary.
Clean air filter.
Drain fuel tank and carburetor; add correct fuel.
Drain fuel tank and carburetor; add fresh fuel.
Check oil level and add if necessary.
Clean air filter.
Check / replace spark plug.
Drain fuel tank and carburetor; add correct fuel.
Drain fuel tank and carburetor; add fresh fuel.
Clean air filter.
Check / replace spark plug.
Engine makes knocking or pinging sounds
Engine skips, misfires, or backfires
High fuel consumption
Reduced blade life
Excessive belt wear
Dirty air filter
Faulty spark plug
Improper fuel
Faulty spark plug
Dirt in fuel line
Dirty air filter
Faulty spark plug
Engine overheats Dirt in fuel line
Drain fuel tank and carburetor; add correct fuel.
Check / replace spark plug.
Drain fuel tank and carburetor; add fresh fuel.
Clean air filter.
Check / replace spark plug.
Drain fuel tank and carburetor; add fresh fuel.
Dirty air filter
Faulty spark plug
Dirty air filter
Faulty spark plug
Clean air filter.
Check / replace spark plug.
Clean air filter.
Check / replace spark plug.
Improper blade for application Replace blade with correct blade.
Improper belt tension Adjust belt tension.
Improper belt tension Adjust belt tension.
Damage from external objects Make sure belt guard is in place during operation.
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51
Technical Data
7 Technical Data
BFS 2020AS
Engine Power Rating
Net power rating per SAE J1349. Actual power output may vary due to conditions of specific use.
Model
Engine Manufacturer
Engine Model
Rated speed
Maximum rated power at rated speed
Spark plug
Spark plug gap
Fuel type
Fuel consumption
Fuel tank capacity
Engine oil type
Engine oil capacity
Water tank capacity
Arbor diameter
Maximum blade diameter
Maximum cutting depth
Dimensions
(with extension arm)
L x W x H
Dry weight rpm kW (HP) type mm (in.) l/hr
(qt/hr) l (qt) l (qt) l (qt) mm (in.) mm (in.) cm (in.) mm (in.) kg (lb)
BFS-2020AS
Honda
GX 630
3600
15.5 (20.8) @ 3600 rpm
ZFR5F (NGK)
PJKJ16CR8 (Denso)
0.70–0.80 (0.028–0.031)
Regular unleaded gasoline
86 octane or higher
4.1 (4.3)
6.5 (6.9)
4-stroke SAE 10W-30
API class SJ or equivalent
2.01 (2.1)
23 (26)
25.4 (1.0)
500 (20)
19.3 (7.6)
1651 x 635 x 940
(65 x 25 x 37)
140.6 (310)
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Emission Control Systems Information and Warranty
8 Emission Control Systems Information and Warranty
The Emission Control Warranty and associated information is valid only for the
U.S.A., its territories, and Canada.
8.1
Emission Control Systems Warranty Statement
See the supplied engine owner’s manual for the applicable exhaust and evaporative emission warranty statement.
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53
Wacker Neuson Produktion GmbH & Co. KG, Preußenstraße 41, D-80809 München, Tel.: +49-(0)89-3 54 02-0 Fax: +49 - (0)89-3 54 02-390
Wacker Neuson Production Americas LLC, N92W15000 Anthony Ave., Menomonee Falls, WI 53051
Tel. : (262) 255-0500 Fax: (262) 255-0550 Tel.: (800) 770-0957
Wacker Neuson Limited - Room 1701–03 & 1717–20, 17/F. Tower 1, Grand Century Place, 193 Prince Edward Road West, Mongkok, Kowloon, Hongkong.
Tel: (852) 3605 5360, Fax: (852) 2758 0032

Public link updated
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Key features
- Gasoline engine
- Diamond-tipped blade
- Depth control
- Hydrostatic transmission
- Safety guard