Baroness FS900 User manual

Riding Sweeper
Service Manual
Serial No. FS900：10001-
Ver.1.0

This manual describes about the procedures of maintenance and malfunction diagnosis etc. of this machine.
Items of description are categorized per system for representative maintenance contents.
As for repair items specified by the manufacturers in the hydraulic system, engine, etc., their respective
disassembling and maintenance procedures are not described.
For repair, please contact your sales dealer or Kyoeisha.
For operation, handling and adjustment instruction, please refer to the Owner's Operating Manual.
Be sure to also read the Owner's Operating Manual for the engine, battery, etc.
See the parts catalog for required parts.
Kyoeisha Co., Ltd.
Caution
The information described in this manual is subject to change for improvement without prior notice.
When replacing parts, be sure to use genuine Baroness parts or parts designated by Kyoeisha.
Note that the Baroness product warranty may not apply to defects caused by the use of parts from other
companies.
Warning Symbols
This manual uses the following warning symbols for handling precautions that are important for your
safety.
696cq5-001
Warning symbol
This symbol indicates the articles regarding “Danger,” “Warning,” or “Caution.”
Those articles describe important safety precautions and so read them carefully to understand completely before
operating the machine.
Failure to adequately follow these safety precautions may cause an accident.
Danger
Danger
This symbol indicates that serious injury or death will occur if the warning is ignored.
Warning
This symbol indicates that serious injury or death may occur if the warning is ignored.
Caution
This symbol indicates that injury or damage to property may occur if the warning is ignored.
Important
This symbol indicates precautions on the mechanism of the machine.
FS900
Introduction

Safety .............................................................. Page 1-1
Safe Operating Practices ...............................Page 1-2
Safety Signs and Instruction Signs ................ Page 1-5
Disposal .......................................................... Page 2-1
Waste Disposal ..............................................Page 2-2
Maintenance standards and maintenance ...Page 3-1
Unit conversion .............................................. Page 3-2
Maintenance standards ................................. Page 3-4
Tightening torques ......................................... Page 3-5
General precautions ...................................... Page 3-9
Jacking up the machine ............................... Page 3-11
Greasing ...................................................... Page 3-13
Hydraulic system ........................................... Page 4-1
Maintenance .................................................. Page 4-2
Specifications .................................................Page 4-3
General instructions .......................................Page 4-9
Hydraulic circuit flow .................................... Page 4-17
Special Tool ................................................. Page 4-24
Measurement ...............................................Page 4-28
General inspection and repair ......................Page 4-40
Inspection and repair of each section .......... Page 4-43
Electrical system ............................................Page 5-1
Maintenance .................................................. Page 5-2
Specifications .................................................Page 5-3
Special Tool ................................................... Page 5-4
Measurement .................................................Page 5-5
Adjustment .....................................................Page 5-7
Electrical components ....................................Page 5-8
General inspection and repair ......................Page 5-18
Main body ....................................................... Page 6-1
Maintenance .................................................. Page 6-2
Specifications .................................................Page 6-2
Special Tool ................................................... Page 6-3
Adjustment .....................................................Page 6-5
Removal and installation of each section .... Page 6-10
Inspection and repair of each section .......... Page 6-13
Operating Machine and Mower Units ...........Page 7-1
Maintenance .................................................. Page 7-2
Specifications .................................................Page 7-2
Special Tool ................................................... Page 7-3
Adjustment .....................................................Page 7-4
Removal and installation of each section .... Page 7-11
Inspection and repair of each section .......... Page 7-23
Troubleshooting .............................................Page 8-1
Relating to the Engine ................................... Page 8-2
Relating to Traveling ......................................Page 8-4
Relating to Steering ....................................... Page 8-5
Operating Machine Related ........................... Page 8-6
Reference ........................................................Page 9-1
Specifications .................................................Page 9-2
Maintenance Schedule .................................. Page 9-3
Hydraulic Circuit Diagram .............................. Page 9-5
Electrical Circuit ............................................. Page 9-6
Electric Wiring Diagram ................................. Page 9-7
List of Consumables ...................................... Page 9-8
FS900
Contents

FS900
Contents

Safe Operating Practices ...................... Page 1-2
Training ..................................................Page 1-2
Preparation ............................................ Page 1-2
Operation ...............................................Page 1-3
Maintenance and storage ...................... Page 1-4
Safety Signs and Instruction Signs ..... Page 1-5
About Safety Signs and Instruction
Signs ......................................................Page 1-5
Safety
FS900
Safety
Page 1-1

Failure to adequately follow these safety
precautions may cause an accident resulting in
injury or death.
Danger
Danger
This machine is designed to ensure safe
operation and has been tested and inspected
thoroughly before shipment from the factory.
The machine is equipped with safety devices
to prevent accidents.
However, whether the machine demonstrates
its original performance level depends on the
manner in which it is operated and handled,
as well as the manner in which it is managed
on a daily basis.
Inappropriate use or management of the
machine may result in injury or death.
Observe the following safety instructions to
ensure safe operation.
Safe Operating Practices
The following instructions include the ones from
CEN standard EN 836: 1997, ISO standard
5395: 1990, and ANSI B71.4-2004.
Training
Read this manual and other training material
carefully. Be familiar with the controls, safety
signs, and the proper use of the equipment.
If the operator or mechanic can not read
English it is the owner's responsibility to
explain this manual to them.
All operators and mechanics should seek
and obtain professional and practical
instruction.
The owner is responsible for training the
users.
Such instruction should emphasize.
The need for care and concentration when
working with ride-on machines.
Control of a ride-on machine sliding on a
slope will not be regained by the
application of the brake.
The main reasons for loss of control are
Insufficient wheel grip
Being driven too fast
Inadequate braking
The type of machine is unsuitable for its
task
Lack of awareness of the effect of
ground conditions, especially slopes
1.
2.
3.
[1]
[2]
-
-
-
-
-
Incorrect hitching and load distribution
Never allow children or people unfamiliar
with these instructions to use or service the
machine.
Local regulations may restrict the age of the
operator.
The owner/use can prevent and is
responsible for accidents or injuries
occurring to themselves, other people, or
property.
Keep in mind that the owner, operator, and
mechanic are responsible for accidents or
hazards occurring to other people or their
property.
Preparation
Evaluate the terrain to determine what
accessories and attachments are needed to
properly and safety perform the job.
Only use accessories and attachments
approved by the manufacturer.
While operating, always wear substantial
footwear, long trousers, hard hat, safety
glasses, and ear protection.
Long hair, loose clothing, or jewelry may get
tangled in moving parts.
Do not operate the equipment when barefoot
or wearing open sandals.
Inspect the area where the equipment is to
be used and remove all objects such as
rocks, toys and wire which can be thrown by
the machine.
Exercise care in the handling of fuel.
Warning
Warning-Fuel is highly flammable.
Take the following precautions.
Store fuel in containers specifically
designed for this purpose.
Add fuel before starting the engine.
Never remove the cap of the fuel tank or
add fuel while the engine is running or
when the engine is hot.
Refuel outdoors only and do not smoke
while refueling.
If fuel is spilled, do not attempt to start the
engine but move the machine away from
the area of spillage and avoid creating any
source of ignition until petrol vapours have
dissipated.
-
4.
5.
6.
1.
2.
3.
4.
[1]
[2]
[3]
[4]
FS900
Safety
Page 1-2 Safe Operating Practices

Replace all fuel tanks and container caps
securely.
Check that operator's presence controls,
safety switches and shields are attached and
functioning properly.
Do not operate unless they are functioning
properly.
If the brake operation is faulty or the parking
brake lever has noticeable play, be sure to
adjust or repair them before operating the
machine.
Replace faulty mufflers.
Operation
Do not operate the engine in a confined
space where dangerous carbon monoxide
fumes can collect.
Only operate in good light, keeping away
from holes and hidden hazards.
Before attempting to start the engine,
disengage all attachments, shift into neutral,
and engage the parking brake.
Only start engine from the operator`s
position.
Use seat belts if provided.
Remember there is no such thing as a safe
slope. Travel on grass slopes requires
particular care.
To guard against overturning:
Do not stop or start suddenly when going
up or downhill.
Engage clutch slowly, always keep
machine in gear, especially when traveling
downhill.
Machine speeds should be kept low on
slopes and during tight turns.
Stay alert for humps and hollows and
other hidden hazards.
Never operate across the face of the
slope, unless the machine is designed for
this purpose.
Never drive the machine on a slope with
an angle of gradient that is greater than
that specified or in a place where there is
a danger of the machine slipping.
Never operate the machine with damaged
guards, shields, or without safety protective
devices in place.
Be sure all interlocks are attached, adjusted
and functioning properly.
[5]
5.
6.
7.
1.
2.
3.
4.
[1]
[2]
[3]
[4]
[5]
[6]
5.
Do not change the engine governor settings
or overspeed the engine. Operating the
engine at excessive speed may increase the
hazard of personal injury.
Do the following before leaving the
operator`s position.
Stop on level ground.
Disengage the power take-off and lower
the attachments.
Change into neutral and set the parking
brake.
Stop the engine and remove the key.
Disengage the drive to attachments, stop the
engine, and remove the ignition key in the
following conditions.
Before refueling.
Before making height adjustment unless
adjustment can be made from the
operator's position.
Before cleaning blockages.
Before checking, cleaning, or working the
machine.
After striking a foreign object or if an
abnormal vibration occurs.
Inspect the machine for damage and
make repairs before restarting and
operating the equipment.
Keep hands and feet away from the cutting
units and the rotating parts.
Look behind and down before backing up to
be sure of a clear path.
Do not carry passengers.
Never operate while people, especially
children, or pets are nearby.
Slow down and use caution when making
turns and crossing roads and sidewalks.
Disengage drive to attachments when
transporting or not in use.
When using any attachments, never direct
discharge of material toward bystanders nor
allow anyone near the machine while in
operation.
Do not operate the machine under the
influence of alcohol or drugs.
6.
7.
[1]
[2]
[3]
[4]
8.
[1]
[2]
[3]
[4]
[5]
9.
10.
11.
12.
13.
14.
15.
16.
Safety
FS900
Safety
Page 1-3
Safe Operating Practices

Take care when loading or unloading the
machine into a trailer or a truck. Load or
unload the machine in a flat and safe place.
Before loading or unloading, set the parking
brake on the truck or trailer, stop the engine,
and chock the wheels.
When transporting the machine on a truck or
a trailer, set the parking brake, stop the
engine, and fasten the machine to the truck
with a rope or other suitable restraining
device that has sufficient strength.
When using a running board, select one with
sufficient strength, length, and width and that
will not cause the machine to slip.
Close the fuel valve before transporting the
machine.
Use care when approaching blind corners,
shrubs, trees, or other objects that may
obscure vision.
Do not take your eyes off the road ahead. Do
not operate the machine with no hands.
Reduce the throttle setting during engine
run-out and, if the engine is provided with a
shut-off valve, turn the fuel off at the
conclusion of operation.
Maintenance and storage
Disengage drives on level ground, lower the
atattachments, set parking brake, stop
engine and remove key from ignition.
Wait for all movement to stop before
adjusting, cleaning or repairing.
When machine is to be parked, stored, or left
unattended, lower bucket.
To reduce the fire hazard, keep the engine,
silencer/muffler, battery compartment fuel
storage area, cutting units and drives free of
grass, leaves, or excessive grease.
Clean up oil or fuel spillage.
Allow the engine to cool before storing in any
enclosure.
Only cover the machine with a sheet after
hot parts have sufficiently cooled down.
Never store the equipment with fuel in the
tank inside a building where fumes may
reach an open flame or spark.
If the engine is provided with a shut-off
valve, shut off valve while storing or
transporting.
Do not store fuel near flames.
17.
18.
19.
20.
21.
1.
2.
3.
4.
5.
6.
7.
8.
Never allow untrained personnel to service
machine.
Allow the engine/muffler to cool before
checking/maintenance.
Appropriately manage and correctly use the
tools necessary for servicing or adjusting the
machine.
Use jack stands to support components
when required.
Carefully release pressure from components
with stored energy.
Be sure to depressurize the hydraulic system
before performing maintenance operations
on it such as removing hydraulic equipment.
Check whether line connectors in the
hydraulic system are properly tightened.
Before applying hydraulic pressure, check
the connections of the hydraulic pressure
lines and the condition of the hoses.
When checking the hydraulic circuit for
pinhole leaks or oil leakage from nozzles, do
not use your hands.
Use items such as paper or corrugated
cardboard to find leakage points.
Be extremely careful with high-pressure oil
as it may pierce your skin, result.
If fluid is injected into the skin it must be
surgically removed within a few hours by a
doctor familiar with this form of injury or
gangrene may result.
Disconnect battery before making any
repairs.
Disconnect the negative terminal first and
the positive last.
Reconnect positive first and negative last.
Make sure that parts such as wires are not
touching each other and that their covers
have not come off.
Keep hands and feet away from moving
parts.
If possible, do not make adjustments with the
engine running.
Charge batteries in an open well ventilated
area, away from spark and flames.
Unplug charger before connecting or
disconnecting from battery.
Wear protective clothing and use insulated
tools.
Keep all parts in good working condition and
all hardware tightened.
Replace all worn or damaged decals.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
FS900
Safety
Page 1-4 Safe Operating Practices

Keep all nuts, bolts and screws tight to be
sure the equipment is in safe working
condition.
If the fuel tank has to be drained, do this
outdoors.
Safety Signs and Instruction Signs
About Safety Signs and Instruction Signs
Warning
Safety decals and instruction decals are
attached to this machine.
Make sure that they are preserved in their
entirety. If they are damaged, become dirty, or
peel off, replace them with new ones.
Part numbers for decals that need to be
replaced are listed in the parts catalog.
Order them from a Baroness dealer or
Kyoeisha.
22.
23.
Safety
FS900
Safety
Page 1-5
Safety Signs and Instruction Signs

FS900
Safety
Page 1-6 Safety Signs and Instruction Signs

Waste Disposal ...................................... Page 2-2
About the Waste disposal ......................Page 2-2
Disposal
FS900
Disposal
Page 2-1

Waste Disposal
About the Waste disposal
Make sure that waste generated when
servicing or repairing the machine is disposed
of in accordance with local regulations.
(e.g. waste oil, antifreeze batteries, rubber
products, and wires etc.)
FS900
Disposal
Page 2-2 Waste Disposal

Unit conversion ......................................Page 3-2
Inch–millimeter conversion table ........... Page 3-2
US unit–SI unit conversion table ............Page 3-3
Maintenance standards .........................Page 3-4
List of Maintenance Specifications ........ Page 3-4
Tightening torques ................................ Page 3-5
Standard tightening torques .................. Page 3-5
Principal tightening torques ................... Page 3-8
General precautions .............................. Page 3-9
Bearing .................................................. Page 3-9
Stop ring .............................................. Page 3-10
Jacking up the machine ...................... Page 3-11
About the Jacking up the machine ...... Page 3-11
Jack-up Points ..................................... Page 3-11
Greasing ............................................... Page 3-13
About Greasing ....................................Page 3-13
Maintenance standards and maintenance
FS900
Maintenance standards and maintenance
Page 3-1

Unit conversion
Inch–millimeter conversion table
1 mm = 0.03937 in
1 in = 25.4 mm
Fractions Decimals mm Fractions Decimals mm
1/64 0.015625 0.397 33/64 0.515625 13.097
1/32 0.03125 0.794 17/32 0.53125 13.494
3/64 0.046875 1.191 35/64 0.546875 13.891
1/16 0.0625 1.588 9/16 0.5625 14.288
5/64 0.078125 1.984 37/64 0.578125 14.684
3/32 0.9375 2.381 19/32 0.59375 15.081
7/64 0.109275 2.778 39/64 0.609375 15.478
1/8 0.1250 3.175 5/8 0.6250 15.875
9/64 0.140625 3.572 41/64 0.640625 16.272
5/32 0.15625 3.969 21/32 0.65625 16.669
11/64 0.171875 4.366 43/64 0.671875 17.066
3/16 0.1875 4.762 11/16 0.6875 17.462
13/64 0.203125 5.159 45/64 0.703125 17.859
7/32 0.21875 5.556 23/32 0.71875 18.256
15/64 0.234375 5.953 47/64 0.734375 18.653
1/4 0.2500 6.350 3/4 0.7500 19.050
17/64 0.265625 6.747 49/64 0.765625 19.447
9/32 0.28125 7.144 25/32 0.78125 19.844
19/64 0.296875 7.541 51/64 0.796875 20.241
5/16 0.3125 7.938 13/16 0.8125 20.638
21/64 0.328125 8.334 53/64 0.828125 21.034
11/32 0.34375 8.731 27/32 0.84375 21.431
23/64 0.359375 9.128 55/64 0.859375 21.828
3/8 0.3750 9.525 7/8 0.8750 22.225
25/64 0.390625 9.922 57/64 0.890625 22.622
13/32 0.40625 10.319 29/32 0.90625 23.019
27/64 0.421875 10.716 59/64 0.921875 23.416
7/16 0.4375 11.112 15/16 0.9375 23.812
29/64 0.453125 11.509 61/64 0.953125 24.209
15/32 0.46875 11.906 31/32 0.96875 24.606
31/64 0.484375 12.303 63/64 0.984375 25.003
1/2 0.5000 12.700 1 1.000 25.400
FS900
Maintenance standards and maintenance
Page 3-2 Unit conversion

US unit–SI unit conversion table
To Convert Into Multiply By
Linear Measurement
Miles
Yards
Feet
Feet
Inches
Inches
Inches
mi
yd
ft
ft
in
in
in
Kilometers
Meters
Meters
Centimeters
Meters
Centimeters
Millimeters
km
m
m
cm
m
cm
mm
1.609
0.9144
0.3048
30.48
0.0254
2.54
25.4
Area
Square Miles
Square Feet
Square Inches
Acre
mile2
ft2
in2
ac
Square Kilometers
Square Meters
Square Centimeters
Hectare
km2
m2
cm2
ha
2.59
0.0929
6.452
0.4047
Volume
Cubic Yards
Cubic Feet
Cubic Inches
yd3
ft3
in3
Cubic Meters
Cubic Meters
Cubic Centimeters
m3
m3
cm3
0.7646
0.02832
16.39
Weight
Tons (Short)
Pounds
Ounces (Avdp.)
sh tn
lb
oz
Metric Tons
Kilograms
Grams
ton
kg
g
0.9078
0.4536
28.3495
Pressure Pounds/Sq. In.
Pounds/Sq. In.
psi
psi
Kilopascal
Bar
kPa
mdyn/cm2
6.895
0.069
Work
Foot-pounds
Foot-pounds
Inch-pounds
lb-ft
lb-ft
lb-in
Newton-Meters
Kilogram-Meters
Kilogram-Centimeters
N-m
kgf-m
kgf-cm
1.356
0.1383
1.152144
Liquid Volume Quarts
Gallons
qt (US)
gal (US)
Liters
Liters
L
L
0.9463
3.785
Liquid Flow Gallons/Minute gal/min Liters/Minute L/min 3.785
Temperature Fahrenheit °F Celsius °C 1. Subract 32 °
2. Multiply by 5/9
Maintenance standards and maintenance
FS900
Maintenance standards and maintenance
Page 3-3
Unit conversion

Maintenance standards
List of Maintenance Specifications
FS900
Engine
Engine model Vanguard 356447
No load rpm 1,400 - 3,000 rpm
Quantity of engine oil 1.6 dm3 (1.6 L) (0.42 U.S. gals)
(including filter)
API Service Grade SF or
higher.
SAE Viscosity that is
appropriate for the operating
environment (ambient
temperature).
Main body
(including
hydraulic
and
electrical
systems)
Fuel tank capacity 16.0 dm3 (16.0 L) (4.23 U.S. gals) Unleaded gasoline
Hydraulic tank capacity 17.0 dm3 (17.0 L) (4.49 U.S. gals) Shell Tellus S2M46 or
equivalent (ISO VG46)
Distance between the steering
stopper and the frame surface. 17 mm (0.669 in)
Pump drive belt tension Adjust the belt tension so that the
spring cover is not lifted H-PXSB43
Brush belt tension
Approx. 10 mm sag under the finger
pressure (98 N or 10 kgf) on the V-belt
in the middle between the pulleys.
H-PX44
Distance between released
and pressed positions of the
brake pedal switch.
2 mm (0.079 in) or longer When the parking brake is
applied.
6 mm (0.24 in) or shorter When the brake pedal is fully
depressed
Forward/reverse pedal
proximity switch clearance 5 mm (0.20 in) or less Clearance between the switch and detection magnet
Battery 40B19L
Tire pneumatic pressure
(option)
Front wheel: 80 kPa (0.8 kgf/cm2)
11.60 psi 18 x 9.50 - 8 in
Rear wheel:120 kPa (1.2 kgf/cm2)
17.40 psi 20 x 10.00 - 10 in
FS900
Maintenance standards and maintenance
Page 3-4 Maintenance standards

Tightening torques
Standard tightening torques
Bolts and Nuts
Important
A number of bolts are used in each part of this machine.
Be sure to re-tighten the bolts and nuts, because they may be loosened at the earlier stage of the
use.
As to the bolts and nuts without any special instruction, tighten them in appropriate tightening torque
with proper tool.
Too much tightening may cause the looseness or damage of the screw.
The strength of tightening is determined by types of screws, strength, the friction of thread face or
base face and others.
The table below is for the galvanized or parkerized bolts.
In case that the strength of internal thread is weak, it is not applied.
Do not use rusty or sand attached "screw."
Otherwise, it may cause insufficient tightening even if you apply the specified tightening torque.
The friction of the screw face becomes higher and the tightening torque is canceled out by the
friction, therefore sufficient tightening cannot be applied.
If "screw" is wet by water or oil, do not tighten it with normal tightening torque.
If the screw is wet, the torque coefficient will get smaller and it may result in too much tightening.
Too much tightening may cause looseness by the screw stretched or result in damage.
Do not use a bolt experienced too much burden.
Using the impact wrench requires the skill.
Do exercise as much as possible for steady tightening.
Nominal
diameter
General bolt
Strength classification 4.8
M4 T
4.8
tib3yb-001
N-m kgf-cm lb-in
M5 3 - 5 30.59 - 50.99 26.55 - 44.26
M6 7 - 9 71.38 - 91.77 61.96 - 79.66
M8 14 - 19 142.76 - 193.74 123.91 - 168.17
M10 29 - 38 295.71 - 387.49 256.68 - 336.34
M12 52 - 67 530.24 - 683.20 460.25 - 593.02
M14 70 - 94 713.79 - 958.52 619.57 - 831.99
M16 88 - 112 897.34 - 1142.06 778.89 - 991.31
M18 116 - 144 1,182.85 - 1,468.37 1,026.72 - 1,274.54
M20 147 - 183 1,498.96 - 1,866.05 1,301.10 - 1,619.73
M22 295 3,008.12 2,611.05
M24 370 3,772.89 3,274.87
M27 550 5,608.35 4,868.05
M30 740 7,545.78 6,549.74
Maintenance standards and maintenance
FS900
Maintenance standards and maintenance
Page 3-5
Tightening torques

Nominal
diameter
Heat-treated bolt
Strength classification 8.8 Strength classification 10.9
8 T
8.8
8
tib3yb-002
11T
10.9
11
tib3yb-003
N-m kgf-cm lb-in N-m kgf-cm lb-in
M5 5 - 7 50.99 - 71.38 44.26 - 61.96 7 - 10 71.38 - 101.97 61.96 - 88.51
M6 8 - 11 81.58 - 112.17 70.81 - 97.36 14 - 18 142.76 - 183.55 123.91 - 159.32
M8 23 - 29 234.53 - 295.71 203.57 - 256.68 28 - 38 285.52 - 387.49 247.83 - 336.34
M10 45 - 57 458.87 - 581.23 398.30 - 504.51 58 - 76 591.43 - 774.97 513.36 - 672.68
M12 67 - 85 683.20 - 866.75 593.02 - 752.34 104 - 134 1,060.49 - 1,366.40 920.50 - 1186.03
M14 106 - 134 1,080.88 - 1,366.40 938.21 - 1,186.03 140 - 188 1,427.58 - 1,917.04 1,239.14 - 1,663.99
M16 152 - 188 1,549.94 - 1,917.04 1,345.35 - 1,663.99 210 - 260 2,141.37 - 2,651.22 1,858.71 - 2,301.26
M18 200 - 240 2,039.40 - 2,447.28 1,770.20 - 2,124.24 280 - 340 2,855.16 - 3,466.98 2,478.28 - 3,009.34
M20 245 - 295 2,498.27 - 3,008.12 2,168.50 - 2,611.05 370 - 450 3,772.89 - 4,588.65 3,274.87 - 3,982.95
M22 - - - 530 5,404.41 4,691.03
M24 - - - 670 6,831.99 5,930.17
M27 - - - 1,000 10,197.00 8,851.00
M30 - - - 1,340 14,628.78 11,860.34
Note:
The same values are applied to "fine screw thread."
FS900
Maintenance standards and maintenance
Page 3-6 Tightening torques

Hydraulic hose
The tightening torques for union joints and union adaptors with parallel pipe threads (G, PF) are
shown in the table below.
A union joint or adaptor will not become loose or leak as long as it is tightened by the specified
torque.
If fluid leaks from the sealed portion, do not attempt to tighten the union joint or adaptor forcibly.
Examine whether any foreign matter or scratches are present on the seat surface.
Tightening a union joint or adaptor forcibly could damage the connection of the joints.
When tightening a union joint or adaptor, use a torque wrench where possible and firmly tighten it by
an appropriate torque.
Nominal diameter of
the hose size
Nominal diameter of
the parallel pipe
threads (PF)
Tightening torque
N-m kgf-cm lb-in
6 1/4 24.50 250 221.28
9 3/8 49.03 500 564.91
12 1/2 58.84 600 677.89
15 3/4 117.68 1200 1,355.78
19 3/4 117.68 1200 1,355.78
25 1 137.30 1400 1,581.74
32 1-1/4 166.72 1700 1,920.69
38 1-1/2 205.94 2100 2,372.61
50 2 245.17 2500 2,824.54
Fittings with parallel threads (O-ring seal type)
The tightening torques for fittings with parallel threads (O-ring seal method) are shown in the table
below.
Tightening an adjustable joint forcibly with a spanner or other such tool to secure it to a set position
could damage the adjustable joint, its washers, and other parts. Be sure to tighten an adjustable
joint to the torque appropriate to its size.
Nominal diameter
of thread
Tightening torque
N-m kgf-cm lb-in.
1/4 34.32 - 49.03 350 - 500 309.79 - 442.55
3/8 68.65 - 78.45 700 - 800 619.57 - 708.08
1/2 98.07 - 117.68 1000 - 1200 885.10 - 1,062.12
3/4 147.10 - 176.52 1500 - 1800 1,327.65 - 1,593.18
1 245.17 - 274.59 2500 - 2800 2,212.75 - 2,478.28
1-1/4 294.20 3000 2,655.30
1-1/2 294.20 3000 2,655.30
2 392.27 4000 3,540.40
Maintenance standards and maintenance
FS900
Maintenance standards and maintenance
Page 3-7
Tightening torques

Principal tightening torques
Tightening Torque by Model
FS900
Tighten the following bolts and nuts to the torque specified in the table.
For thread locking adhesive, apply a middle strength thread locker (ThreeBond 1322 anaerobic
adhesives).
Location Code Part name
Tightening torque Thread
locking
adhesive
N-m kgf-cm lb-in
Fro
nt
whe
el
Front wheel
housing K0011120252 Bolt, heat-treated M12-25P1.5 67 – 85 683.20 - 833.75
593.02 –
752.34 －
Wheel K0010100302 Bolt, heat-treated M10-30 45 - 76 458.87 -
774.97
398.30 -
672.68 －
Rea
r
whe
el
Wheel
mounting seat K0160000492 Special nut M24-P1.5 180 – 200
1,835.46 –
2,039.40
1,593.18 –
1,770.20 ○
Wheel K0011120302 Bolt, heat-treated
M12-30P1.5 67 – 85 683.20 - 833.75
593.02 –
752.34 －
Front wheel arm K0010100252 Bolt, heat-treated M10-25 45 - 76 458.87 -
774.97
398.30 -
672.68 －
Bucket mounting
frame K0010120602 Bolt, heat-treated M12-60 67 – 85 683.20 - 833.75
593.02 –
752.34 －
FS900
Maintenance standards and maintenance
Page 3-8 Tightening torques