OREC HR531 User manual

INSTRUCTION MANUAL
HR531/662/672/812
Grassland walk behind flail mower
Read this instruction manual carefully before any use of the machine, keep it as a reference.For any
question about this manual, please report to your OREC dealer or to the distributor of your country or
to : http://www.orec-jp.com.
Update : July 2021

“Only the English version of this manual can be used as a reference.”
INTRODUCTION
Forword to the user
Read this manual before any use of your mower, only the herein instructions shall help you to achieve
an efficient and safe work.
A safe use will only result from the manner you will use the machine in accordance with the
restrictions described in this manual. Thus, you must know and follow all the safety measures in this
manual and those relating to the use of your mower.
The MOWER that you have just bought has been designed and manufactured for your entire
satisfaction. As any other mechanical machine, it requires a proper maintenance and must be kept
clean. Grease the machine like indicated. Follow the rules and safety indications as described in this
manual and as showed on the preventive instruction stickers.
About maintenance, always mind that your OREC dealer has the skills, the genuine parts and the
necessary tools to solve the possible problems.
Use only the OREC original parts : “ non genuine ” parts will not assure you of a correct and safe
working and are likely to make the guarantee null and void. Write the name and the serial number of
your machine hereunder :
MODEL :.......................................................................................
SERIAL NUMBER (refer to the pictures herein) :.........................
Always mention these informations to your dealer in order to obtain the right parts.
Concerned about constant progress, OREC keeps the right to modify the machines without being
compelled to modify those already sold.
The illustrations and characteristics in this manual might lightely differ from your machine because of
the constant improvements made by our production department.
In this manual, the left and the right hand or the rear and the front position are determined according
to the mower handlebar.
All along this manual the word IMPORTANT is used to indicate that a fault might cause damage to the
machine. The words WARNING, CAUTION and DANGER are used with the “ safety/warning ”
pictogram (triangle with an exclamation mark) in order to indicate a hazard for your safety.
This symbol indicates that you must be very attentive because your safety is at stake. It reminds that
you must follow the safety instructions and pay attention to hazardous operations that might cause
injuries.
WARNING
Reminds the safety rules that might cause injury if they are not respected
CAUTION
Remembers to pay attention to a real danger that is likely to cause injury or even death if no proper
precaution is taken.
DANGER
Indicates a major hazard that is most likely to cause irremediable injury or death if the right
precautions are not taken.

CONTENTS
INTRODUCTION ................................................................................................................................................2
CONTENTS ........................................................................................................................................................3
SPECIFICATIONS..............................................................................................................................................3
CHECK LIST .......................................................................................................................................................4
SAFETY RULES .................................................................................................................................................4
DIFFERENT PARTS OF THE MOWER .............................................................................................................6
SAFETY INSTRUCTION STICKERS .................................................................................................................7
CONTROLS ........................................................................................................................................................9
OPERATION.....................................................................................................................................................11
MAINTENANCE OPERATIONS TO BE CARRIED OUT BY THE USER ........................................................13
BREAKDOWNS AND SOLUTIONS .................................................................................................................19
TIGHTENING TORQUES (Nm)........................................................................................................................20
EC CONFORMITY DECLARATION .................................................................................................................21
MEASUREMENT OF VIBRATIONS .................................................................................................................21
EC CONFORMITY DECLARATION .................................................................................................................22
MEASUREMENT OF VIBRATIONS .................................................................................................................22
EC CONFORMITY DECLARATION .................................................................................................................23
MEASUREMENT OF VIBRATIONS .................................................................................................................23
EC CONFORMITY DECLARATION .................................................................................................................24
MEASUREMENT OF VIBRATIONS .................................................................................................................24
LIMITED WARRANTY ......................................................................................................................................25
NOTES..............................................................................................................................................................25
SPECIFICATIONS
Model
HR531 HR662 HR672 HR812
Engine
HONDA GX200 HONDA GX270 HONDA GX270 HONDA GX340
Engine power (kW)
4.1 6.3 6.3 8.0
Transmission
Mechanical Mechanical Mechanical Mechanical
Forward speed (km/h)
(1) 0.85
(2) 1.78
(3) 3.14
(1) 0.94
(2) 1.96
(3) 3.45
(1) 0.94
(2) 1.96
(3) 3.45
(1) 0.94
(2) 1.96
(3) 3.45
Reverse speed (km/h)
0.85 0.94 0.94 0.94
Cutting width (mm)
520 650 650 800
Height of cut (mm)
50-110 50-110 50-110 50-110
Weight (kg)
124 160 160 160
Fuel tank capacity (liters)
3.1 5.3 5.3 6.1
Blade transmission
Belts belts belts belts
Blade engagement
Belt tension belt tension belt tension belt tension
Side clutch
Free free lockable lockable
blade speed (rpm)
2840 3075 3075 3075
Over all width (mm)
700 815 815 950

CHECK LIST
INSTRUCTIONS TO THE DEALER
• The assembling, the installation and the first application of the machine is under the OREC dealer’s
responsability.
• Read the instruction manual as well as the safety measures. Check that all the before delivery and
at delivery check points specified in the following lists have been verified and possibly modified before
delivering the machine to its owner.
CHECKS BEFORE DELIVERY
• Check that all the shields, grids and safety guards are in place and in a good condition.
• Check that the hydraulic hoses are in place and in a good condition. Replace them if necessary.
• Check that there is no oil leak, repair if necessary.
• Check that the safety instruction stickers are in place and in a good condition. Replace them if
necessary.
• Check that all the bolts and screws are properly tightened with the right torque (refer to torque
chart).
• Protect the grease nipples by coating them with grease and lubricate the machine.
• Check that the machine can work properly.
CHECKS ON DELIVERY
•Show the user how to perform the adjustments.
•Explain to the user the importance of the lubrication and show him the different greasing points on
the machine.
•Show him the safety devices, grids, guards and the optional equipments.
•Give the instruction manual to the customer, ask him to read it carefully.
SAFETY RULES
CAUTION
Some of the illustrations show the machine with no guard, no shield. Never use the machine
without these devices.
•Learn to stop the machine in case emergency.
•Read this manual.
•Do not let anybody use the machine before having read and understood this
manual.
•Do not let children use the machine.
•Do not wear loose clothes. They might be grasped by moving parts.
•Always wear protection equipments for when using the machine.
•Only work during daylight or with a good artificial light.
•Check that the safety instruction stickers are in place and in a good condition.
•Keep the machine free from debris or mud.
•Check that the machine can work properly before any use.
•Check that all the shields, grids and safety guards are in place and in a good state.
•It is strictly forbidden to carry persons or animals onto the machine during the work or during the
transportation.

•Never stop or start roughly when working on a slope. Never use the machine to work on a stepping
terrain.
•Reduce the ground speed when running on a slope and when turning
straight in order to prevent from any risk of losing control.
•Be very careful when bordering ditches.
•Stop the engine, and remove the sparking plug ignition cover before any
intervention on the machine.
•Never work under the machine or its parts when lifted, unless they are
blocked and maintained into position with sufficient security.
•When running on a slope, always work going up or down but never across
the slope.
•Steer clear of unsteady embankments, holes or rocks. They might be dangerous during manœuvres
or transport.
•Keep away from electric wires and obstacles. A contact with electric wires cause electrocution and
death.
•Stop the machine progressively when lifting or lowering the machine.
•When stopping the work, stop the engine and remove the sparking plug ignition cover before leaving
the mower.
•Engage all the safety equipments.
•Move the controls only when correctly sat down in the mower
•Visually check hydraulic leaks and if some parts are faulty or missing. Repair before use.
•Never change the adjusment of the regulator, it is set in the factory. Unsetting this valve would cause
failures.
•Ensure that the user of the machine has already read and understood this
manual and that he is aware of all the safety instructions before any use.
•Always use a chuck and bronze hammer when replacing or intervening
on the pins and bolts at the end of rams, rod … etc in order to avoid the
projection of metal fragments.
•Clear the mowing path from foreign objects, stones, woods, cans, bottle,
pieces of steel, wich can ne thrown by the mower.
•Gasoline is hightly flammable :
•- Refuel outside, never smoke when refuelling
•- Never refuel when the engine is running, stop the engine before refuelling
•- Allowed the engine to cool down before refuelling
•- If gasoline has spilled, do not try to start engine before the spilled gasoline has been wiped.
•- Check that the fuel cap is correrctly installed after refuelling
•

DIFFERENT PARTS OF THE MOWER
Side clutch
lever
Driving clutch
lever
Left
Right
Rear
Throttle
Starter
Blade clutch
locking lever
Fuel tank
Handlebar
adjustment
(L /R)
Blade tension
lever
Air Filter
Fuel Cock
Front
Cutting
height
adjustment
Handlebar
adjustment
UP/DOWN

SAFETY INSTRUCTION STICKERS
Note their location and replace them immediately in case of damage or when missing
Read owner’s manual
Beware of thrown objects
Keep away from the
machine
Unplug the spark plug wire before
perform maintenance, read owner’s
manual
Read owner’s manual to be aware of
the risks
like burns, breathing
intoxication, and fire
No hands or feet under the
mowing deck

SAFETY INSTRUCTION STICKERS (continued)
No hands or feet under
the mowing deck
Do not exceed 15°
slopes
Always wear
protective equipment
against dust, noise
and wear glasses
Beware of rotative belt under the
shield

CONTROLS
DRIVING CLUTCH LEVER
Push the lever(1, Figure 1) down to the handlebar to
make the machine moving. Release the lever, then the
machine stops.
BLADE CLUTCH LEVER
Blade clutch lever makes the engine drive the blade to
mow. Press the lever (2, Figure 1) then pull the lever (3,
Figure 1) to make the blade turning.
Release the lever, then the rotor stops.
WARNING
Never try to start or stop the engine with blade
engaged
THROTTLE LEVER
Push the throttle lever(4, Figure 1) to left to increase engine speed, push the throttle lever to right to
decrease engine speed to idle rpm. Always operate mower at full engine speed.
SIDE CLUTCH LEVERS
The side clutch levers (5, Figure 1) are used to change the direction of the machine. Grip right lever to
turn right and left lever to turn left. To move the machine when engine is cut off, grip the both levers.
DANGER
Do not grip the two levers in slopes when engine is running.
HANDLEBAR ADJUSTMENT LEVERS
Grip the lever(6, Figure1) to move handelbar right and left(except
HR531).
And grip the lever(7, Figure 1) to move handlebar up/dpwn.
SPEED LEVER
This lever (Figure 2) allows to select 3 forward speeds (1, 2, 3), 1 reverse
speed (R) or 3 neutral location (N).
WARNING
Be sure to change speed only when driving clutch is
disengaged and machine is stopped.
CHOKE LEVER (1, FIGURE 3)
Push this lever to X to operate the choke to start engine cold,
when engine has start release it to Y.
IMPORTANT
There is no need to choke when the engine is hot.
Figura 2
3
2
1
X
Y
1
2
2
1
5
5
4
6
7
3
Figura 1
Figura 3

FUEL COCK (2, FIGURE 3)
Open fuel cock before using the machine. Close fuel cock when
machine is not in use. Push the lever to Y to open fuel cock and to
X to close cock.
HEIGHT OF CUT CONTROL
Height of cut can be setted by turning the crank-lever (1,Figure 4)
clockwise to increase the height of cut and anti- clockwise to
decrease the height of cut.
WARNING
Always perform this adjustment with engine off and sparking
plug cover unplugged. When cutting low, more power is
needed and more objects are thrown. Cutting low can cause damage to the machine and injuries.
ENGINE ON/OFF SWITCH
This switch is located on the engine(HR531, Figure 5) or on the left
side of the handlebar(HR662/672/812, Figure 6).
It allows to run the engine when positionned on « ON » and stop
the engine when positionned on “OFF”.(Figure 5) Use this switch
to start or stop the engine.
ENGINE :
Refer to engine manual delivered with the machine.
.
1
Figura 4
Figura 5(HR531)
Figura 6(HR662/672/812)

OPERATION
CAUTION
Check the tightening of bolts, refering to the tightening torque chart
The safety is one of our main worries when designing and manufacturing this machine. Negligence
in the use of the machine spoils our efforts. The prevention strictly depends on the care and on the
skill of the user when applying and maintaining the machine. The best safety method remains a
careful and skilled user ; we hope you to be this kind of user.
The user of this machine is responsible for its safe use. He must be a skilled user specially trained for
the use of this machine. Read the safety instructions. This machine has been designed to mow grass.
It is not designed for any other operation. It is not designed to transport other tools or materials that
might damage it and cause injuries to the user. It must not be used to carry persons.
DANGER
Never use the machine without having priorly carried out all the maintenance operations as
described in the daily maintenance chapter.
CAUTION
Never let children or unskilled persons use the machine. Check that nobody or no object stands
near the machine when at work. They could be hit by the moving parts.Nobody must stand on
the machine except the driver. Never put your hands under moving parts.
STARTING OF THE ENGINE
Turn the fuel cock to "ON".
Check that cutting blade is disengaged, and Driving lever range is in neutral position « N ».
Push choke lever if engine is cold or push throttle lever half of his stroke if the engine is hot.
Pull the starter rope.
When the engine has started, pull back the choke lever.
Select a speed ratio and travel to the mowing path.
MOWING
Start the engine
Adjust the height of cut as needed.
WARNING
Do not forget that it is better to mow grass regularly. Remember that the machine gets
deteriorated rapidly in the hot and dry weather. When cutting height is low, the blade may hit
the ground and get damaged. The user and bystanders are likely to get injured by the thrown
objects. The thrown objects may cause damage to
properties. Working in slopes is very dangerous.
Never work in slopes more than 15°.
Increase engine speed to the maximum.
Push down the blade clutch lever (2, Figure 7) then
engage the blade tension lever (3, Figure 7) slowly.
Then go forward in the grass to mow.
The best cutting speed depends of quantity and the
density of the grass. Usually, it is asked to mow
between 1st and 2nd speed. Tall grass should be cut
slowly and short grass can be cut faster.
2
1
5
5
4
6
7
3
Figura 7

CAUTION
Clear the mowing path from foreign objects, stones, woods, cans, bottles, pieces of steel,
which can be thrown by the mower. They can cause injury to the operator or the bystanders.
HOW TO STOP THE MACHINE
•Release drive clutch lever and blade clutch lever.
•Push the throttle lever to “LO”.
•Switch the engine stop on “off”
•Close the fuel cock
•Remove the spark plug wire
CAUTION
Never park the machine on slopes. Park it on a level and flat surface.
STORING THE MACHINE
Thoroughly clean the machine. Use touch up paint to prevent rust. Check for worn and damage parts,
install new parts as required. Perform the normal maintenance of the machine according to
maintenance chart. Store the machine in a dry protected area. Remove sparking ignition wire from the
sparking plug.
TRANSPORT
•Check that the cutting rotor is disengaged.
•Check that the spark plug cover is disconnected.
•Check that the fuel cock is closed.
CAUTION
Take care of hot surfaces of the machine, especially around the engine.

MAINTENANCE OPERATIONS TO BE CARRIED OUT BY THE USER
DANGER
BEFORE performing any maintenance operation on the machine, stop the engine, and remove
the spark wire from the sparking plug.
If maintenance operation is not realized, damages can occur to the machine and personnal injuries to
the user and/or spectators. These damages and injuries will not be covered by the warranty.
•Daily maintenance will be performed by the user.
•Maintenance operations for first 20 hours, 100 and 300 should be realized by the dealer.
•Ask your dealer to check the machine if you find some problems.
•Ask your distributor the name of your dealer.
DAILY MAINTENANCE,BEFORE START MOWING
Transmission oil level : Loosen the bolt of the oil gauge (1 Figure 8), if
the level is correct, the oil level should appear in the gauge.
Transmission oil replacement
•Gear Oil : SAE90 or API GL-5
•Gear Oil Quantity : 1.60L
Put a container under the right side of the transmisson to receive old oil,
remove the drain plug (3 Figure 9).
Then, fix the drain plug (3 Figure 9).
Put the oil from the oil cap (2, Figure 8)
Oil Exchange Frequency
First : 20 hours
Later : each 100 hours or every year whichever comes first.
FUEL (FIGURE 10)
Check tank level is full before start to work.Check that tank cap is
fully closed, and check for leaks. Use only a good quality unleaded
gasoline.
DANGER
Check fuel tank is closed, wipe fuel spillages before start the machine. Check there is no fire,
electric sparks, cigarettes near the machine when refuelling.
3
1
2
Figura 8
Figura 9
Figura 10

Tires (Figure 11)
Check tires are not cutted, cracked or worn.
Check tires pressure : 1,4 bar rear.
SAFETY STICKERS
•Check safety stickers are sticked at their place. Replace them if
they are worn and damage.
AIR FILTER
-Open the air cleaner cover and remove the dual-filter elements.
-Remove the foam filter element from the paper filter element.
-Clean paper filter element with compressed air (read the engine
manual).
-Clean foam filter element with soapy water, and dip in oil(read the
engine manual).
-Install the elements and air cleaner cover referring the engine
manual.
ENGINE OIL LEVEL :
Refer to engine manual. With the engine cold or stopped at
least since 10 minutes on a plate level place. Check level with the
oil filter cap (1, Figure 13). Unscrew the plug, wipe it and install
without screwing it. Check the level that must be between the two
marks.
Engine oil : SAE 10W30 or API SL class
Engine oil quantity : 0.6L(HR531), 1.1L (HR662/672/812)
Remove oil drain plug(2, Figure13) in case of changing oil.
Engine oil replacement
First : 20 hours
Later : each 100 hours or every year whichever comes first.
BLADE AND BLADE HOLDER CONDITION
CAUTION
You can be cutted and injuried by cutting flails. Always
wear gloves when holding flails.
Check if flails are in good condition, change worn or damage
parts.
Changing flails : unscrew hexagonal bolt on the rotor.
Check the blade condition. Change it if it is worn, bend or
cracked.
AIR CLEANER COVER NUT
AIR CLEANER COVER
WING NUT
PAPER FILTER ELEMENT
SILENCER NOSE
FOAM FILTER ELEMENT
GASKET
Figura 11
Figura 12
Figura 13
Figura 14

Reverse flails if the cutting side is worn out, in order to use the other side.
Check that ALL the flails of the rotor are bolted and in good condition
Check thightening of hexagonal screws according to the chart at the end of the manual.
CAUTION
Use only original genuine OREC parts. Other parts may be dangerous for your
health and for the bystanders and the machine. If some flails are missing, big
vibrations will occur. If you feel such vibrations on the handlebar, check the rotor
and the flails. Vibrations may loosen the bolts and nuts and may crack the steel of
the machine.
TIGHTENING OF BOLT AND NUTS
•Check for tightening of bolt and nuts according to the chart. Vibrations of the
machine may loosen bolt and nuts.
LUBRICATION :
Grease the front wheel axle(1 Figure 15) with grease NLGI N°2.
Grease the differents points G(Figures 16 & 17) with light oil.
WIRES GAP :
Transmission wires :
•If the machine does not stop when the drive clutch lever is released, adjust the tension wire as follow :
unscrew the locking screw (A, Figure 18) and unscrew the nut (B, Figure 18). Try the machine again.
Perform the adjustment again if needed. When the adjustment is performed, screw the locking screw
(A, Figure 18) on the nut (B, Figure 18).
•If the machine does not move when driving clutch lever is pressed, adjust the tension wire as follow : unscrew
the locking screw (C, Figure 18) and unscrew the nut (D, Figure 18). Try the machine again. Perform the
adjustment again if needed. When the adjustment is performed, screw the locking screw (C, Figure 18) on the nut
(D, Figure 18).
Blade wire :
C
E
F
A
B
Figura 15
Figura 16
Figura 17
Figura 18
Figura 19

•If the blade does not stop when the blade lever is released, adjust the tension wire as follow : unscrew
the locking screw (A, Figure 19) and unscrew the nut (B, Figure 19). Try the machine again. Perform
the adjustment again if needed. When the adjustment is performed screw the locking screw (A, Figure
19) on the nut (B, Figure 19).
•If the blade does not move when transmission lever is pressed, adjust the tension wire as follow :
unscrew the locking screw (A, Figure 19) and after screw the nut (B, Figure 19). Try the machine again.
Perform the adjustment again if needed. When the adjustment is performed screw the locking screw
(A, Figure 19) on the nut (B, Figure 19).
Blade brake is connected with the blade wire. Check if the blade brake works correctly when
adjusting blade wire control.
Direction wires :
If the wheel is not free(HR531/662/) or not locked(HR672/812) with side clutch lever engaged, adjut as
follows:
•Uscrew locking nut (E, Figures 18,19).
•Screw or unscrew the nuts F .
•Try the machine.
•Adjust again if it is necessary.
•Screw the locking nut “E” on the adjusting nuts “F”.
Handlebar Control wire adjustment
If the handlebar control doesn’t work correctly, adjust as follow :
- If it is difficult to free the handlebar, unscrew the nut (A, Figure 20,21), then screw the nut B to increase
the wire tension. When the adjustment has been performed, rescrew the nut A.
- If the handlebar doesn’t lock properly, unscrew the nut (A, Figure 20,21), then uncrew the nut A to
decrease the wire tension. When the adjustment has been performed, rescrew the nut B.
¥
A
B
A
B
A
Figura 21
Figura 20

BELTS ADJUSTMENT:
WARNING
A loosened belt may slip and get worn quickly, a too tightened belt may wear out bearings.
Check for belt condition, cracks and wear. Replace if necesary.
Belt from engine to counter shaft
Switch off the engine, disconnect the spark plug wire and
lock the blade clutch lever in the “ON” position.
Unscrew the three bolts of the shield to reach the belts.
Push the belt with a finger on (A, Figure 22) the belt must
move from 10 to 12 mm. If the belt does not move
accordingly, perform “tension wire” again.
Check that the belt guides “B” are close 3 or 4 mm from
the tighten belt.
If it is necessary, adjust the belt guides as follow :
unscrew bolt C, adjust belt guides as required and screw the bolt again.
Fit the belt cover with the three bolts.
Belt from the counter shaft to the flails
•Stop engine and disconnect sparking cover.
•Unscrew the 2 bolts of the shield to reach the belt.
•Push the belt with a finger on (F, Figure 23) the belt must move from 3
to 5 mm. If the belt does not move accordingly, adjust with screws A &
B.
•Fit the belt cover with the two bolts.
Belt transmission adjustment
•Switch off the engine, disconnect the spark plug wire and lock
the blade clutch lever in the “ON” position.
•Unscrew the three bolts of the shield to reach the belts.
•Push the belt with a finger on (A, Figure 24) the belt must
move from 12 to 14 mm. If the belt does not move accordingly,
perform “tension wire” again.
•Fit the belt cover with the three bolts.
BLADE BRAKE :
WARNING
CHECK THE BLADE BRAKE EVERY MONTH (1, FIGURE 25), CHECK THE TIME FOR
THE BLADE TO STOP WHEN BLADE CLUTCH LEVER IS RELEASED.IF MORE THAN 7
SECONDS ARE NECESSARY FOR THE BLADE TO STOP,ASK YOUR DEALER
IMMEDIATELY TO CHECK THE BLADE BRAKE SYSTEM.
Figura 22
Figura 23
Figura 24
Figura 25

MAINTENANCE CHART
Accidents or troubles can be caused if you do not inspect and maintain the machine. Inspect and maintain as
below in order to keep the machine work good and safe.
* For engine, refer to engine manual.
Frequency : D / Daily
M / Monthly
Y / Yearly
PART INSPECTION DETAIL
FREQUENC
Y
D
M
Y
Belt
tension
Tension is right.
○○○
damage, stains and dirt
There are no cracks, damage
or excessive dirt.
○○
Trans-
mission
strange noise and heat
There are no strange noise or heat.
○○
oil gauge and dirt
Transmission oil level is adequate and
the oil is not excessively dirty.
○
oil leakage
There are no visible oil leaks
from oil seal and packing.
○○○
Body
Frame
cracks, deformation
bolts and nuts
There are no cracks or deformation.
Bolts and nuts are in place and tight.
○○
Cover cracks, deformation, corrosion
There are no cracks,
deformation, or corrosion.
○
Flapper
damage, defects and loss
There are no damage, defects or loss.
○○○
Lever
Wire
damage, loose
split pins loss
There are no noticeable damage, loosening.
Split pins are in place. ○○○
Tire
Tire pressure and tire groove
They are all within allowance.
○○○
cracks, damage, wear-out
There are no cracks, damage or wear-out.
○○○
stuck metal pieces,
stones or etc.
There are no metal pieces,
stones or etc. stuck.
○○○
loosening or loss
of bolts and nuts Bolts and nuts are in place and tight. ○○○
strange noise and loosening
There are no loosening or strange noise.
○○
Blade
Rotary
damage and balance of blade
Blades are not broken, chipped,
cracked or bent.
Blades are balanced.
○○○
loosening of blade setting bolt
Blade setting bolts are in place and tight.
○○○
rotary cover
There are no cracks,
deformation, or corrosion.
○○
Label
damage
All safety stickers are in place and legible.
○○

BREAKDOWNS AND SOLUTIONS
If you face with the problems below, refer to “solution” and take the appropriate action.
* For engine, refer to engine manual.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Cut grass is not
discharged well.
Grass is wet.
Wait until grass sets dry.
Grass is tall.
Mow with higher cutting height first.
Cutting height is too low.
Raise the cutting height.
Engine power is too low.
Increase the power to the max.
Mowing speed is too high.
Decrease the speed.
Some grass
remains.
Mowing speed is too high.
Decrease the speed.
Engine power is too low.
Increase the power to the max.
Blade is blunt, worn out or broken.
Replace the blade with a new one.
Some grass is stuck inside of
rotary cover.
Clean up and take out grass
inside of the cover.
Grass is tall.
Mow with higher cutting height first.
Cut into
the ground.
Cutting height is too low.
Raise the cutting height.
Turning speed is too high.
Turn slowly.
The ground is wave-shaped.
Change the direction of mowing.
The ground is bumpy
and has many ups and downs.
Raise the cutting height.
Blade is bent or deformed.
Replace the blade with a new one.
Belts are slipping.
Belt tension is too low.
Adjust belt tension.
Foreign objects are stuck inside of
rotary cover. Clean up inside of the cover.
Some grass is stuck on pulley.
Clean up pulley.
Belt is worn out.
Replace the belt with a new one.
Cannot change
mowing speed.
Gear position is misaligned.
Adjust change wire.
Fault of transmission.
Repair the transmission.
There is
big vibration.
Blades are poorly balanced.
Replace all blades.
Blade is damaged.
Replace the blade with a new one.
Blade drum is bent.
Replace Blade drum ASSY with a new
one.
Belt is broken.
Replace the belt with a new one.
A new blade and an old blade are
installed.
Do not install new and old blades together.
Some grass is stuck on blade
drum.
Remove the stuck grass on blade drum.
Mowing workload
is heavy.
Engine power is too low.
Increase the power to the max.
Mowing speed is too high.
Decrease the speed.
Some grass is stuck on/around
blade shaft.
Clean up the blade.
Grass is tall.
Mow with higher cutting height first.
Cutting height is too low.
Raise cutting height.
Tires are slipping.
The ground is soft.
Wait until the ground gets dry.
Fuel cap
popped out.
Too much transmission oil
(Too high internal pressure)
Take out some oil to
the recommended level.
* If you have any questions or do not understand any points, please contact your dealer.

TIGHTENING TORQUES (Nm)
Diameter
of
screw(mm)
Mark on the screw head
4
7 8 9 11
3
0.3~0.5
---
---
---
---
4
0.8~1.0
---
---
---
---
5
2.5~3.4
5.4~6.4
6.4~7.4
6.4~7.4
8.8~9.8
6
4.9~6.9
9.8~11.8
11.8~13.7
11.8~13.7
14.7~16.7
8
11.8~16.7
24.5~29.4
29.4~34.3
34.3~36.2
36.3~41.2
10
20.6~29.4
39.2~44.1
49~53.9
49~53.9
72.6~82.4
12
44.1~53.9
83.4~93.2
93.2~107.9
93.2~107.9
122.6~137.3
14
63.7~78.5
117.7~132.4
132.4~147.1
147.1~166.7
205.9~225.6
16
88.3~107.9
152~171.6
176.5~196.1
215.8~245.2
313.8~343.2
18
117.7~137.3
205.9~235.4
245.2~274.6
313.8~343.2
441.3~470.7
20
147.1~166.71
235.4~274.6
313.8~353
441.3~480.5
617.8~657.1
22
176.5~205.9
421.7~451.1
539.4~578.6
608~647.2
843.4~882.6
24
235.4~264.8
539.4~568.8
706.1~745.3
784.5~823.8
1098.4~1137.6
Or without mark