Husqvarna FS 6500, FS 3800 User Manual

Operator’s manual:

all operators of this machine have read and understand the content of
this manual before using the product! Careless or improper use of this
machine can cause serious or even fatal injury! Allow only competent
adults to operate this machine!

It is the owner’s responsibility to ensure that

FS 3800
FS 6500

CONTACT INFORMATION

Construction Products, North America

Corporate Ofce

17400 West 119th Street, Olathe, Kansas 66061 USA

Corporate Ofce: 913-928-1000
Corp. Ofce Fax: [phone]

www.husqvarnacp.com

For local service, please contact your local Husqvarna Construction Products representative.

Para efectuar un servicio local, póngase en contacto con su representante local de

Husqvarna Construction Products.

Pour toute réparation, contacter le représentant local de Husqvarna Construction Products.

Für Service vor Ort wenden Sie sich bitte an Ihren örtlichen Vertreter von Husqvarna Construction Products.

Neem voor plaatselijke service contact op met uw plaatselijke vertegenwoordiger van de constructieproducten

van Husqvarna.

Per assistenza, rivolgersi al rappresentante di zona della Husqvarna Construction Products.

För service på platsen, kontakta din lokala representant för Husqvarna Construction Products.

Para obter serviço técnico local, contactar o representante da Husqvarna Construction Products

Europa / Europe:

Husqvarna Construction Products

SE-433 81 Partille, Sweden

Tel: [phone]

Fax: [phone]

Asia Pacic:

Husqvarna Construction Products, Australia Pty Ltd

25-31 Kinkaid Avenue,

North Plympton, Adelaide,

South Australia 5037

Tel:[phone]

Fax:[phone]

The Americas:

Husqvarna Construction Products, North America

17400 West 119th Street, Olathe, Kansas 66061 USA

Toll-Free Telephone: [phone], Telephone: [phone]

Fax: [phone]

2

EVERY MACHINE IS THOROUGHLY TESTED BEFORE LEAVING THE FACTORY. EACH
MACHINE IS SUPPLIED WITH A COPY OF THIS MANUAL. OPERATORS OF THIS EQUIPMENT
MUST READ AND BE FAMILIAR WITH THE SAFETY WARNINGS. FAILURE TO OBEY
WARNINGS NAY RESULOT IN INJURY OR DEATH. FOLLOW INSTRUCTIONS STRICTLY TO
ENSURE LONG SERVICE IN NORMAL OPERATION.

Table of Contents

CONTENTS PAGE NO.

Contact Information _ 2
Symbol Definitions _ 4-5
Decal Locations 6
Safety Warnings – DO’s and DO NOT’s 8

-7

-9
Blade and Engine RPM 10-11
WARNINGS – Hearing and Dust 12
Saw Controls Diagram 13

OPERATION INSTRUCTIONS

1. Uses 14

2. Assembly 14

3. Check Before Operating 14-15

4. Operating Instructions 15-16

5. Incidents During Operation 16

6. Maintenance

7. Accessories

8. Repairs

16
16
16

9. Spare Parts 16

10. Engine Governor Settings 16-17

Wiring Schematic
Raise & Lower Electric Schematic

18

19
Maintenance Schedule – Saw and Engine ______ 20
Pre-Operation Checklist _____ 21

3

SYMBOL DEFINITIONS DEFINICIÓN DE SIMBOLOS

_______________________________________________________________________

• Please read the instructions for use prior to operating the machine for the first time.

• Antes de la puesta en marcha, lea detenidamente las instrucciones y familiaricese con la máquina.

• Mandatory

• Obligatorio

• Indication

• Indicación

• Prohibition

• Prohibición

• Warning Triangle

• Triángwulo De Advertencia

• Wear Eye Protection

• Usar Gafas De Protección

• Wear Head Protection

• Usar Casco De Protección

• Wear Breathing Protection

• Usar Máscara De Protección

• The Use Of Ear Protection Is Mandatory

• Es Obligatorio El Uso De Protección Auditiva

• Wear Safety Shoes

• Usar Zapatos De Seguridad

• Wear Appropriate Clothing

• Usar Ropa Adecuada

• Motor Off

• Parar El Motor

• Use In Well Ventilated Area

• Usar En Una Área Bien Ventilada

• Do Not Use In Flammable Areas

• No Usar In Áreas Inflamables

• Machinery Hazard, Keep Hands And Feet Clear.

• Máquina Peligrosa - Mantenga Manos Y Pies Alejados De La Máquina

4

• Danger, Poison Exhaust Gas

• Peligro, Gases De Escape Tóxicos

• No Non-working Personnel In Area

• Prohibido Para Personas Ajenas A La Obra

• No Smoking

• No Fumar

• Do Not Operate Without All Guards In Place

• No Operar Sin Todas Las Protecciones In Su Sitio

• Always Keep the Blade Guards In Place

• Mantenga Siempre Las Protecciones De La Hoja En Su Sitio

• Keep Work Area Clean/Well Lit, Remove All Safety Hazards

• Mantenga Limpio El Sitio De Trabajo/Bien Iluminado, Elimine Todos Los Riesgos De Seguridad

• Dangerously High Noise Level

• Nivel De Ruido Elevadamente Peligroso

• Pay Extreme Attention To The Care And Protection Of The Machine Before Starting Up

• Ponga Extrema Atención Al Cuidado Y Preparación De La Máquina Antes De Ponerla En Marcha

• Remove Tools From Area and Machine

• Elimine Las Herramientas Del Área Y De La Máquina

• Oil Required

• Necesita Aceite

• Dipstick, Maintain Proper Oil Level

• Varilla De Control, Mantenga El Nivel De Aceite Correcto

• Lubrication Point

• Punto De Lubrication

• Unleaded Fuel Only

• Solamente Combustible Sin Plomo

• Repairs Are To Be Done By An Authorized Dealer Only

• Las Reparaciones Deben Ser Efectuadas Únicamente Por Un Distribuidor Autorizado

• Diamond Blade

• Sierra Diamantada

• Blade Diameter

• Diámetro De La Hoja

• Muffler Hot. May Cause Burns and / or Ignition Of Material. Avoid Contact.

• Silenciador de tubo de escape caliente. Puede causar quemaduras y/o ignición del material.
Evite los contactos.

5

ETIQUETAS Y SU UBICACIÓN

AUTOCOLLANTS ET LEURS EMPLACEMENTS

DECAL, BLADE GUARD CAUTION

LOCATION: BLADE GUARD

P/N 541 20 06-08

DECALS & LOCATIONS

DECAL, CAUTION, KEEP HANDS CLEAR

LOCATION: SHAFT GUARD, BELT GUARD,

REAR COWL PANEL

P/N 539 30 01-60 (3X)

DECAL, S.M.I. WARNING

LOCATION: BLADE GUARD

P/N 541 20 07-22

DECAL, AIR FILTER SERVICE

LOCATION: AIR CLEANER

P/N 541 20 06-45

THIS MACHINE IS COVERED BY

ONE OR MORE OF THE FOLLOWING

PATENTS 301,479

DECAL, PATENT

LOCATION: FRONT OF COWL

P/N 541 20 07-13

DECAL, CHOKE / THROTTLE

LOCATION: THROTTLE BRACKET

P/N 541 20 06-02

DECAL, INSTRUMENT PANEL

LOCATION: INSTRUMENT PANEL

P/N 541 20 13-25

6

DECALS & LOCATIONS

LOWER

CAUTION

READ ALL INSTRUCTIONS BEFORE OPERATING THIS SAW

TRANSMISSION CONTROL

Lever in NEUTROL (N), engage transmission. To move saw,
move Speed Control Lever to the forward or reverse

RAISE

lever in Neutrol (N). With engine running & Speed Control

position.

BLADE CONTROL

Toggle switch in handle activates blade raise and lower.

Start saw with transmission disengaged and speed control

4

B C

1

2

3

D

E

541201671 SHT 1 OF 2

ETIQUETAS Y SU UBICACIÓN

AUTOCOLLANTS ET LEURS EMPLACEMENTS

DECAL, OPERATION INSTRUCTIONS

LOCATION: TOP OF COWL

P/N 502 47 33-01

DECAL, HUSQVARNA FS 6500

LOCATION: SIDES OF COWL (2X - FS 6500)

P/N 542 19 07-04

DECAL, HUSQVARNA FS 3800

LOCATION: SIDES OF COWL (2X - FS 3800)

P/N 542 19 07-05

DECAL, COVER PLATE

LOCATION: TOP OF COWL

P/N 541 20 16-71

DECAL, HUSQVARNA, 9.85” LONG

LOCATION: REAR OF COWL

P/N 542 19 07-33

7

BEFORE YOU BEGIN: Read and understand all warnings and instructions before operating the
Machine described in this manual. WARNINGS AND CAUTIONS IN THIS MANUAL MUST BE

UNDERSTOOD AND FOLLOWED! FAILURE TO OBEY WARNINGS MAY RESULT IN
SERIOUS INJURY OR DEATH. IT IS YOUR RESPONSIBILITY to make sure persons who use

this machine have read this manual.

SAFETY WARNINGS FOR OPERATION OF THIS MACHINE

DO read this entire operator’s manual before operating this machine. Understand all warnings, instructions, and controls.

keep all guards in place and in good condition.

DO

wear safety-approved hearing, eye, head and respiratory protection.

DO

read and understand all warnings and instructions on the machine.

DO

read and understand the symbol definitions contained in this manual.

DO

keep all parts of your body away from the grinding disks and all other moving parts.

DO

know how to stop the machine quickly in case of emergency.

DO

shut off the engine and allow it to cool before refueling.

DO

inspect the accessory disk, and tool adapters for damage before installing the tools.

DO

use only tools manufactured for use on surface grinders.

DO

verify grinder drive configuration by checking engine / motor RPM, and spindle shaft RPM, pulley diameters.

DO

read all safety materials and instructions that accompany any tool used with this machine.

DO
DO inspect each tool carefully before using it. If there are any signs of damage or unusual wear, DO NOT USE THE

TOOL!

mount the tool solidly and firmly.

DO

make sure the tool and accessory disk are clean and free of dirt and debris before mounting the tool on the saw.

DO

use the correct tool for the type of work being done. Check with tool manufacturer if you do not know if tool is correct.

DO

operate this machine only in well ventilated areas.

DO

instruct bystanders on where to stand while the machine is in operation.

DO

establish a training program for all operators of this machine.

DO

clear the work area of unnecessary people. Never allow anyone to stand in near the machine while the engine is

DO

running.
always tie down the machine when transporting.

DO

use caution and follow instructions when setting up or transporting the machine.

DO

have all service performed by competent service personnel

DO

verify that the tool size is compatible with the machine before mounting the tool.

DO

make sure the fuel caps of the machine and the fuel can are properly tightened before starting the engine. Move fuel

DO

can at least 10 feet from machine after fueling.
clean the machine after each day’s use.

DO

remove adjusting tool and wrenches from machine before turning it on.

DO

keep the handles dry, clean and free of oil and dirt.

DO

carefully maintain and clean for better and safer performance. Follow instructions for changing accessories. Inspect

DO

tool cords periodically and, if damaged, have repaired by authorized service facility.
use caution when handling fuel.

DO

always give a copy of this manual to the equipment user. If you need extra copies, call TOLL FREE 1-800-288-5040.

DO

Determine the nature and volatility of any material that will come in contact with the grinding action of the tools used by

DO

this machine.
operate the machine only in areas where the material in contact with the grinding tools is known.

DO

use only non-flammable and proper substances to improve the material removal from the work area.

DO

8

BEFORE YOU BEGIN: Read and understand all warnings and instructions before operating the
Machine described in this manual. WARNINGS AND CAUTIONS IN THIS MANUAL MUST BE

UNDERSTOOD AND FOLLOWED! FAILURE TO OBEY WARNINGS MAY RESULT IN
SERIOUS INJURY OR DEATH. IT IS YOUR RESPONSIBILITY to make sure persons who use

this machine have read this manual.

SAFETY WARNINGS FOR OPERATION OF THIS MACHINE

DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT
DO NOT

DO NOT
DO NOT
DO NOT

operate this machine unless you have read and understood this operator’s manual.
operate this machine without all guards in place.
leave this machine unattended while the engine or motor is running.
work on this machine while the engine or motor is running.
operate this machine when you are tired or fatigued.
operate the machine if you are uncertain of how to run the machine.
use damaged equipment or tool.
touch or try to stop a moving tool with your hand.
transport a machine with the tools mounted on the machine.
use a tool that has been dropped or damaged
touch the tools immediately after use. These tools require several minutes to cool after operation.
use damaged or worn accessory disk.
allow other persons to be near the machine when starting, refueling, or when the machine is in operation.
operate this machine in an enclosed area unless it is properly vented.
operate this machine in the vicinity of anything that is flammable. Sparks could cause a fire or an explosion.
operate this machine while under the influence of drugs or alcohol.
operate this machine with any of the guards removed.
operate this machine unless you are specifically trained to do so.
start operation of the machine until you have a clear work area and secure footing.
use flammable substances, unsecured loads or people as extra weight. Injury to the operator or other persons
could result!
use flammable, or improper substances to improve the material removal from the work area.
operate the machine if unknown substances are on or near the work area.
operate the machine before you determine the nature and volatility of any material that will come in contact with
the grinding tools used by this machine.

This machine was designed for certain applications only. DO NOT modify this machine or use for any
application other than for which is it was designed. If you have any questions relative to its application, DO
NOT use the machine until you have written HUSQVARNA CONSTRUCTION PRODUCTS and we have
advised you.

*****************

HUSQVARNA CONSTRUCTION PRODUCTS

17400 West 119

Olathe, Kansas 66061, USA

th

Street

9

Blade / Engine (RPM)

WWAARRNNIINNGG::

Important safety information for the operation of pavement saws:
FAILURE TO COMPLY CAN RESULT IN SERIOUS PERSONAL
INJURY

When blade diameter is changed, blade guard, bladeshaft drive and engine RPM (governor setting) MUST
also be changed to maintain proper blade speed. Bladeshaft RPM must be checked prior to installing blade
on equipment (*3). Proper blade speed (RPM) is very important for safe operation and product
performance. The chart, shown below, provides the recommended bladeshaft RPM settings, which will
result in proper speeds for various size blades.

FS3800

BLADE / ENGINE RPM CHART

Blade

Size in

Inches

12 2869 2550 11

14 2869 2550 11 “ “ “ “ “
18 2267 2550 11

20 2267 2550 11 “ “ “ “ “
24 2267 2550 11 “ “ “ “ “
26 2267 2550 11 “ “ “ “ “

30 (*5) 1512 2268 9 “

36 (*5) 1316 1975 7 “ “ “ “ “

(*1) NOTE: No load speed; machine at full throttle with no blade installed.

Blade

Shaft

RPM

No Load

(*1,*3,*4)

Engine

RPM

No Load

(*1)

Setting

Hole No

(*2)

Engine

Sheave

Part No.

541202083

6G4.5x1.75

541202081

6G4.0x1.75

Bladeshaft

Sheave

Part No.

(*5)

541202081

6G4.0x1.75

541202083

6G4.5x1.75

541201390

6G6.0x(*5)

V-Belts
4-Band

(2 Req’d)

541200848

(3/3VX530)

“ “ “

541201391

(3/3VX560

)

Outer Collar

(*6)

539300026

(4-1/2”Dia)

541202080

(6” Dia)

Inner Collar

539300025

(4-1/2”Dia)

541202078

(6” Dia)

(*2) NOTE: Governor Setting on Engine. See Engine Governor Settings Section 10, page 14.
(*3) NOTE: RPM should be checked under no load conditions at the bladeshaft. A hand held tachometer

is best for this purpose.

(*4) NOTE: To achieve proper bladeshaft RPM it is necessary to change engine and bladeshaft sheaves

along with changing engine governor setting.
(*5) NOTE: 541200879 Sheave requires 541202553 Bushing 1.75 SF.
(*6) NOTE: All Collars use the 539300010 Dowel Pin, 3/8” Dia x 1-3/4”

10

FS 6500

BLADE / ENGINE RPM CHART

Blade

Size in

Inches

12 2935 2935 10

14 2935 2935 10 “ “ “ “ “
18 2270 2554 8 “

20 2270 2554 8 “ “ “ “ “
24 2270 2554 8 “ “ “ “ “
26 2270 2554 8 “ “ “ “ “

30 (*5) 1512 2268 7 “

36 (*5) 1316 1975 5 “ “ “ “ “

(*1) NOTE: No load speed; machine at full throttle with no blade installed.

Blade

Shaft

RPM

No Load

(*1,*3,*4)

Engine

RPM

No Load

(*1)

Setting

Hole No

(*2)

Engine

Sheave

Part No.

541202902

8G4.0x2.0

Bladeshaft

Sheave

Part No.

(*5)

541202906

8G4.0x1.75

541202905

8G4.5x1.75

541200879

8G6.0x(*5)

V-Belts
4-Band

(2 Req’d)

541203835

(4/3VX530)

“ “ “

541200847

(4/3VX560)

Outer Collar

(*6)

539300026

(4-1/2”Dia)

541202080

(6” Dia)

Inner Collar

539300025

(4-1/2”Dia)

541202078

(6” Dia)

(*2) NOTE: Governor Setting on Engine. See Section 10, page 14.
(*3) NOTE: RPM should be checked under no load conditions at the bladeshaft. A hand held tachometer

is best for this purpose.
(*4) NOTE: To achieve proper bladeshaft RPM it is necessary to change engine and bladeshaft sheaves

along with changing engine governor setting.
(*5) NOTE: 541200879 Sheave requires 541202553 Bushing 1.75 SK.
(*6) NOTE: All Collars use the 539300010 Dowel Pin, 3/8” Dia x 1-3/4”

11

WARNING

HEARING HAZARD

DURING NORMAL USE OF THIS MACHINE, OPERATOR MAY BE EXPOSED TO A
NOISE LEVEL EQUAL OR SUPERIOR TO 85 dB (A)

ATENCION

RIESGO DE DAÑO AUDITIVO

EN CONDICIONES NORMALES DE UTILIZACIÓN, EL OPERADOR DE ESTA
MÁQUINA PUEDE ESTAR EXPUESTO A UN NIVEL DE RUIDO IGUAL O SUPERIOR A

85 dB (A)

12

SAW CONTROLS DIAGRAM

CONTROLS (FS 3800 & FS 6500)

ITEM

NO.

GAUGE PANEL
(1A ENGINE TACHOMETER)

1

2 ON/OFF ENGINE START SWITCH 12 SPEED CONTROL HANDLES
3 NIGHT LIGHT SWITCH (OPTIONAL) 13
4 WATER SAFETY SWITCH 14 FUEL FILL
5 DEPTH STOP CONTROL KNOB 15
6 CUTTING DEPTH INDICTOR 16 EMERGENCY STOP SWITCH
7 CHOKE CONTROL 17

8 THROTTLE CONTROL 18

9

(1B VOLTMETER)
(1C ENGINE OIL PRESSURE-FS 6500
ONLY)

BLADE RAISE & LOWER TOGGLE
SWITCH

DESCRIPTION

ITEM

NO.

WATER VALVES

11

19 WATER PUMP ON-OFF SWITCH

(11A FLOW CONTROL VALVE)
(11B ON-OFF VALVE)

TRANSMISSION ENGAGEMENT
LEVER

FINE METERING BLADE LOWERING
CONTROL VALVE

GARDEN HOSE CONNECTION
(CONNECT WATER HOSE HERE)

HOSE HANGER (ROUTE WATER
HOSE OVER HANGER TO AVOID
DRAGING HOSE ON RIGHT SIDE OF
MACHINE)

DESCRIPTION

10 HANDLE LOCK KNOBS

13

• Mandatory

• Obligatorio

• Indication

• Indicación

• Prohibition

• Prohibición

• Warning Triangle

• Triángwulo De
Advertencia

These signs will give advice for your safety

Before leaving our factory every machine is
thoroughly tested.

Follow our instructions strictly and your
machine will give you long service in normal
operating conditions.

1. Features
Use: Wet sawing of old and new concrete

and asphalt.
Tools: Diamond blades — water cooled, Ø:

12",14", 18", 20", 24", 26", 30", 36" with
Arbor Ø - 1".

(For information contact your Dealer)

Depth of Cut (Maximum):

Maximum Cutting Depth

Blade

Diameter

Maximum

Cutting

Depth

12” 14” 18” 20” 24”

3.5” 4.5” 6.5” 7.5” 9.5”

Maximum Cutting Depth

Blade

Diameter

Maximum

Cutting

Depth

Maximum material Size: N/A

26” 30” 36” -- --

10.5” 12” 15” -- --

Nominal & Operating Weight: See
“Specifications”.

Dimensions & Shaft RPM: See “Saw
Dimensions”.

Before starting up machine make sure
you read these instructions and are
familiar with the operation of this
machine

.

The working area must be completely clear,
well lit and all safety hazards removed (no
water or dangerous objects in the vicinity)

The operator must wear
protective clothing
appropriate to the work he
is doing.
We recommend hearing,
respiratory and eye
protection.

Any persons not involved in the work,
should leave the area.

Only work of flat horizontal areas.
Working on steep slopes or hills could
cause the operator to lose control of the
machine. This could result in injury or
death to the operator or other persons in
or near the work area!

Use only blades marked with a
maximum operating speed greater
than the blade shaft speed.

2. Assembly

 When unpacked, this unit is fully

assembled, except for installation of the
Muffler. For tool installation see Section 4
of this document.

3. Check Before Operating

All Models:

 Take into account the working conditions from

a health and safety point of view.

 For start up refer to the engine, or motor

manual.

 Engine Fuel: Check the engine operation

manual. Unleaded gasoline is recommended.

 Engine Oil: When the engine is in a horizontal

position, check that the engine oil level is

14

correct. Check the oil level frequently to
ensure that the level never falls below that
specified in the engine operation manual. If
the oil level is low, add SAE 10W30, service
classification SF or SG oil (for normal
conditions) as recommended in the engine
operation manual. DO NOT overfill engine
with oil!

4. Operating Instructions

Preparing to Saw

1. Perform daily maintenance to saw
(see chart).

2. Fuel saw if required. Use good grade
of regular gasoline (14).

3. Remove blade guard and mount
blade securely on blade shaft. For
saws equipped with Magnalock
one-piece outer collar blade shaft,
insert the outer collar through the
blade and into the female inner collar.
Make sure the blade collars are
clean and free of nicks and burrs on
the clamping face. Make sure inner
collar is tight on the shaft and drive
key is in place. Check the drive pin in
the outer collar for damage, loose fit
or being bent. Check the blade arbor
for gouges, nicks or burrs. SAW
BLADE MUST BE HELD TIGHT AND
RUN TRUE to achieve the proper
blade performance.

4. If using wet cutting diamond blades,
visually inspect coolant spray tubes
for plugged or damaged openings.
Clean and repair as necessary.
Proper coolant flow is essential to
good blade performance.

5. Visually inspect blade guard for
cracks, hinge failure or loose
mounting. Repair or replace guard if
necessary. DO NOT USE SAW
WITHOUT BLADE GUARD
SECURELY IN PLACE!

6. Set line guides.

To Saw

1. Place water safety switch in the OFF
position.

2. Start engine and allow it to warm up
at half throttle. Observe proper oil
pressure and charging amps.

3. Set “Quick Stick” speed control
handle (2) to neutral and engage
transmission engagement lever (10).

4. Open throttle (5) to full speed
position. Engine governor is factory

set. DO NOT CHANGE SETTING
unless you have changed the saw
blade capacity to accommodate
larger or smaller diameter blades.

5. Turn on water to blade (8). Set water
safety switch to ON position (leave off
if dry cutting). If engine stops,
recheck water supply. The water
safety switch will automatically shut
off the engine if proper water
pressure is not supplied.

6. Position saw over cut.

7. Lower blade using toggle switch
located in speed control handle (2)
(follow instructions on handle).
Releasing switch will stop blade from
lowering. Stop lowering when blade
contacts pavement. With blade
touching pavement, set cutting depth
indicator (6) to “0”, then continue
lowering until the desired cutting
depth is shown on the cutting depth
indicator.

8. To use depth stop control (3) turn
handle clockwise until resistance is
met. For greater depth, turn handle
counter-clockwise, for lesser depth
turn the handle clockwise.

9. Move speed control handle (2)
forward SLOWLY until proper cutting
speed is achieved.

When Cut is Finished

1. Put speed control handle (2) back to
neutral position.

2. Raise blade from cut by using the
toggle switch in speed control handle.
When switch is released, the raise
will stop and hold in place.

3. Once the blade is completely out of
the cut, turn off water to blade (8).

4. Close throttle (8) to idle position. Let
engine cool down before stopping.
DO NOT STOP ENGINE AT FULL
THROTTLE!

NOTE: All sawing is done with engine at full
throttle. Engine governor is factory set to achieve
proper blade speeds and engine performance.
DO NOT CHANGE GOVERNOR SETTING
unless you are changing blade capacity
(Diameter).

Straight Line Sawing Adjustment

Your saw is equipped with rear axle adjustment to
adjust for blade lead off. The adjustment nut is
located at the back of the saw on the lower left
frame. To adjust saw, stop saw, stop forward
drive, remove blade from cut and stop engine.
Loosen rear axle mount bolts on left rear of saw.

15

If the saw is leading to the right, turn the
adjustment nut COUNTER-CLOCKWISE. If the
saw is leading to the left, turn the adjustment nut
CLOCKWISE. Retighten axle mount bolts
securely after making adjustment.

DO NOT FORCE ADJUSTMENT!

5. Incidents During Operation

WARNING: Before inspecting or
performing any maintenance, ALWAYS
locate the machine on a level surface with
the engine / motor OFF, and the start
switch in the OFF position, and the power
source disconnected.

9. Spare Parts

For a quick supply of spare parts it is
essential to quote the data shown on the
Serial Number Plate fixed to the machine.
Make note of this information & the purchase
date below, and on the front cover of this
document for quick reference:

Model:

____________
_

Serial No:

____________
_

Date:

____________
_

10. Engine Governor Settings

6. Maintenance

WARNING: Before performing any
maintenance, ALWAYS locate the
machine on a level surface with the
engine / motor OFF, and the start switch in
the OFF position, and the power source
disconnected.

Change Engine Oil: Change
engine oil after every 50 hours of
operation.

Engine Oil Type

Under normal operating conditions use SAE
10W30 API service classification SF or SG.
See engine operation manual for other
recommended oil types.

7. Accessories

For information contact your local dealer or
call our Toll free Customer Service
Telephone number shown on the front cover:

8. Repairs

We carry out all repairs in the shortest
possible time and at the most economical
prices. See front cover for our address and
telephone numbers.

LOAD

RPM

1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400

FS 3800 (37 HP VG4D)

Engine Governor Settings

Fig. B

NO

LOAD

RPM

1550
1650
1725
1850
1950
2050
2125
2250
2350
2425
2550

HOLE

4
5
5
6
7
8
8

9
10
10
11

VG4D Governor

Lever Detail

NUMBER

16

LOAD

RPM

FS 6500 (65 HP V465D)

Engine Governor Settings

Fig. B

NO

LOAD

RPM

HOLE

V465D Governor

Lever Detail

NUMBER

1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000

1685
1825
1855
2000
2055
2200
2230
2375
2440
2545
2695
2745
2810
2935
3065
3175

3
4
4
5
5
6
6
7
7
8
9
9

9
10
11
12

17

FS 3800 & FS 6500 WIRING SCHEMATIC

18

FS 3800 & FS 6500 Raise & Lower Electric Schematic

19

FS 3800 / FS 6500 SAW & ENGINE MAINTENANCE SCHEDULE

MAINTENANCE PROCEDURE

Check engine oil level, add to full mark. DO NOT OVERFILL!
Check air cleaner. Shake out loose dirt from element.
Check air cleaner connections. Tighten if necessary.
Clean air intake screen. Engine and air cleaner are to be

cleaned, too.
Check blade shaft drive belt tension. Replace belts if damaged.
Check transmission drive belt tension. Replace belt if damaged.
Check alternator belt tension. Replace belt if damaged.
Check hydrostatic transmission oil level. Oil should be visible in

clear tube.
Grease bladeshaft bearings. DO NOT OVERGREASE!
Check coolant spray tubes in blade guard. Clean if necessary.
Check bladeshaft, bladeshaft bearings, collars and drive pin

condition. Bearings should be tight. No free-play side to side,
collars should be clean and free of nicks and burrs. Bladeshaft
threads should be in good condition and drive pin free of
gouges.

Grease front axle, rear axle and bearings.
Change crankcase oil.
Clean crankcase breather cap.
Clean transmission cooling fins.
Replace oil filter with each oil change.
Replace fuel filter.
Check oil level in raise/lower pump.
Replace air cleaner elements.
Check and clean battery terminals.
Inspect, clean or replace spark plugs and breaker points.

DAILY 50 HRS 100 HRS 250 HRS

•

•

•

•

•

•

•

•

•

•

FREQUENCY

•

•

•

•

•

•

•

•

•

•

•

Oil grade/engine capacity chart

Use Oils classified as Service MS, SD or SE

SEASON OR TEMPERATURE GRADE OF OIL

FS3800 FS6500

Spring, Summer or Autumn: +120°F to +40°F
Winter: +40°F to +15°F
Winter: +15°F to 0°F,
Winter: Below 0°F
Crankcase Capacity V G 4 D 3 7 H P V 465D 65 HP
New Engine 4-1/2 qts. (4.25 L) 6 qts. (5.67 L)
Oil & Filter Change 5 qts. (4.73 L) 7 qts. (6.62 L)
Less Oil Filter or Filter Change 4-1/2 qts. (4.25 L) 6 qts. (5.67 L)

20

SAE 30 SAE 30

SAE 20-20W SAE 20-20W

SAE 10W SAE 10W

SAE SW-20 SAE SW-20

PRE-OPERATION CHECKLIST

Before leaving our factory, every machine is thoroughly tested. Follow our instructions
strictly and your machine will give you long service in normal operating conditions.

Before starting the machine, make sure that you read this entire Operations Manual and
are familiar with the operation of the machine.

WITH MACHINE COLD AND SETTING LEVEL
Gasoline Models: Check engine oil. Fill to the full mark on dipstick with 10W30 oil, class MS, SD, SE or better.

:

1-2 HOUR OPERATION CHECK LIST:

ALWAYS place the machine on a level surface with the engine / motor “OFF”, the
ignition switch set in the “OFF” position and disconnected from the power source before
performing any maintenance. Let the machine cool down!!

1. Check the engine air cleaner hose clamps. Tighten as required.

2. Tension the drive V-belts. DO NOT over tension!

SCHEDULED MAINTENANCE QUICK REFERENCE

Before performing any maintenance, ALWAYS place the machine on a level surface with
the engine / motor “OFF”, the ignition switch set in the “OFF” position and disconnected
from the power source!

SERVICE DAILY:

1. Check engine oil level.

2. Check all guards for damage.

3. Check hoses and clamps for damage or looseness. Tighten or replace as
necessary.

4. Check air cleaner. Clean or replace as required.

5. Clean the machine at the end of the day.

SERVICE EVERY 50 HOURS:

1. Replace engine oil and oil filter.

2. Clean engine air fins.

3. Check V-belt tension. DO NOT over tension!

4. Clean Engine fuel bowl.

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22

DUST WARNING

Cutting, especially when DRY cutting, generates dust that comes from the material being cut, which
frequently contains silica. Silica is a basic component of sand, quartz, brick clay, granite and numerous other

minerals and rocks. Exposure to excessive amount of such dust can cause:

• Respiratory diseases (affecting your ability to breath), including chronic bronchitis, silicosis and

pulmonary brosis from exposure to silica. These diseases may be fatal;

• Skin irritation and rash; and

• Cancer according to NTP* and IARC*

* National Toxicology Program, International Agency for Research on Cancer

Take precautionary steps

• Avoid inhalation of and skin contact with dust, mist and fumes;

• Wet cut when feasible, to minimize dust;

• Wear and ensure that all bystanders wear appropriate respiratory protection such as dust masks

designed to lter out microscopic particles. (See OSHA 29 CFR Part 1910.1200)

California Prop 65 Warning:

Use of this product can cause exposure to materials known to the State of California to cause cancer and/or birth

defects or other reproductive harm.

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24

504 63 69-03

2007-31