SF225, 237

During DPF regeneration, exhaust gas becomes hot and the Exhaust gas high temperature lamp illuminates

When the regeneration procedure is complete the both lamps will turn off and normal operation can start again.

NOTE: If the parking brake is not applied or the water temperature is below 30°C, DPF warm-up will not start.

- Manual regeneration mode (Stage 2):

(Soot load is120% - 139%)

The process is same as stage 1, but with limited output. Engine speed is reduced to 1 500 rpm. Output is reduced to 50%.

- Overload (Stage 1):

(Soot load is 140% - 159%)

If the DPF lamp flashes, the buzzer sounds, and the engine Diagnosis lamp comes on, it is excessive soot loaded. The regeneration procedure must start at dealer to use ISEKI engine service tool.

- Overload (Stage 2):

(Soot load is over 160%)

The DPF is completely clogged. Need to change the DPF.

8.

Soot Load Action Warning Output Limitation Buzzer Regeneration request lamp Diagnosis lamp 1st stage 2nd stage

Automatic regeneration 80100%

User

Manual regeneration (1st stage) 100120% Press "DPF regeneration switch Buzzer (Blinking)

Manual regeneration (2nd stage) 120140% Buzzer (Blinking)

• Output 50%

• Engine 1 500 rpm

9.

Dealer

Overload (1st stage) 140160% Regeneration by using "Service tool Buzzer (Lighting)

Overload (2nd stage) over 160% DPF replacement Buzzer (Lighting)

Manual Regeneration Process And Warning Device Condition

• Output 50%

• Engine 1 500 rpm

• Output 50%

• Engine 1 500 rpm

After 2 hours

• Engine 1 200 rpm

After 1 hour

• Engine 1 200 rpm

Manual regeneration request (Buzzer) (Blinking)

When the soot amount becomes 100% to 140% and manual regeneration is required, "Regeneration request lamp" blinks and buzzer sounds.

Press DPF regeneration switch for more than 3 seconds

1 DPF warm up (Blinking)

2 Regeneration start (Lighting) (Lighting)

3 During regeneration (Lighting) (Lighting)

4 Regeration suspended (Lighting)

5 regeneration completed (Lighting)

6 DPF cooling completed (Lighting)

Engine speed automatically raises to 2 300 rpm. If the parking brake is not applied or the water temperature is below 30 °C, DPF warm-up will not start.

When the PDF warm-up is completed, "Exhaust gas high-temperature lamp" turns on.

Manual regeneration takes approximately 20 to 30 minutes.

If manual regeneration is not in progress for some reason, "Exhaust gas high-Temperature Lamp" turns off.

When the soot amount reaches 0 %, the manual regeneration is completed.

After about 2 minutes of DPF cooling operation, the engine speed automatically drops.

CHAPTER 8. MAINTENANCE

1. MAINTENANCE AND LUBRICATION FILL

1.1.

NOTE: LLC is the abbreviation for Long Life Coolants.

*Low-ash engine oil (Oil quality: higher than API standard CK-4) must be used. Using not applicable engine oil would cause early DPF clogging due to the ash “Ash” is the material additives contained in engine oil.

1.2. INSEPCTION INTERVALS PERIODIC MAINTENANCE SCHEDULE

○: Inspect, replenish or adjust ●: Replace △ : Clean or wash ★ : Replacement or servicing at authorized service facility recommended.

Severe operating conditions (wet, dusty, etc.), or when previous servicing has indicated the need for more frequent action, intervals may need to be more often.

2. SERVICE ACCESS

2.1. Lift up the collector

When you inspect the engine room, lift up the collector fully, and lock the lift cylinder by the lift cylinder lock plate (1). When you encounter any abnormality or trouble which is not mentioned in this manual, please ask your dealer for service.

When lubricating or servicing the front mower:

・Place it on level, and hard ground.

・Stop the engine and remove the starter key.

・Apply the parking brake securely.

・Shift the lift lever forward to DOWN position to lower the mower deck onto the ground.

・Service the front mower after the engine has cooled down sufficiently.

With these items in mind, confirm the safety conditions for maintenance operation without fail beforehand

CAUTION: Lock the lift cylinder without fail. Otherwise, when operator touch the lift lever by accident, it may cause to be caught in the falling container.

2.2. Open the engine hood

Opening / Closing hood

To open the hood (1), lift up the hood by handle (2), to upward.

To close the hood, pull down the hood by using handle.

CAUTION: When opening / closing the hood, be sure to stop the engine and remove the starter key.

3. CHECKING OF ENGINE OIL LEVEL

SF237

SF225 a. Open the cover (1), for the engine oil level gauge window. Pull out the engine oil level gauge (dipstick) (2) which is located on the left side (SF237) / right side (SF225) wall of the engine room. b. Wipe the end of the dipstick with dry cloth. c. Then insert it into the engine properly. d. Pull it out again. The oil level should be between the upper, A, and lower, B, limits. e. If the level is lower than the lower limit, replenish through the engine oil filler (1) to the upper limit with the same kind of oil as that in the engine.

IMPORTANT:(SF237)

・ Low-ash engine oil (Oil quality: higher than API standard CK-4) must be used. Using not applicable engine oil would cause early DPF clogging due to the ash “Ash” is the material additives contained in engine oil.

・ After finishing the maintenance including long time DPF regeneration, replace the engine oil. Because there is a possibility of fuel mixing with engine oil, and oil viscosity decreases.

・ Never replenish with a different kind of oil. The addition of different kind of oil will deteriorate the quality of the original oil.

・The oil level should not exceed the upper limit. Excessive oil will cause engine trouble.

(1) Reserve tank A: Upper limit B: Lower limit

CAUTION: Stop the engine and wait at least 5 minutes before checking the oil level. Engine oil is so hot just after operation as to cause burns and it takes some time as well for all the oil to return to the oil pan.

Location of Engine Oil filler SF237 SF225

・Use oil of the quality recommended by ISEKI or 10W-30 CC grade of SAE classification or higher quality.

・Use oil of proper viscosity in accordance with the atmospheric temperature.

4. ENGINE OIL REPLACEMENT

IMPORTANT: ・The engine oil should be replaced with new oil in accordance with operation hours. If not, overly used oil will cause engine troubles.

・The first replacement should be done after the initial 50 hours of operation and then after every 200 hours of operation.

When replacing engine oil, place the machine on level, hard ground. The engine oil drain (1) is located bottom of the engine oil pan (2).

SF225, 237

a. Place a tray or the like under the oil drain to receive drained oil.

b. The engine should be warmed up for 10 minutes or so beforehand to heat the oil to lower its viscosity for compete drainage.

c. Remove the drain plug (1) allowing the used oil drain out completely.

d. When the used oil has drained out completely, screw the drain plug back in securely.

e. Remove the oil filler cap (1) at the top of engine and pour in new engine oil through the oil filler. Be sure to use oil recommended by ISEKI.

Engine oil capacity: 2.4-3.5 liters (SF225) 3.0-4.8 liters (SF237) f. After engine oil replacement, start the engine and let it idle for a while. g. Then stop it and wait for a while until the engine oil comes down into the oil pan,2. Now check the oil level if it is at the upper limit or not. When the level is low, replenish until the level reaches the upper limit. h. Make sure that there is no oil leakage through the drain plug and oil filter.

IMPORTANT: Never fill over the upper limit, or it may cause engine trouble.

5. ENGINE OIL FILTER

IMPORTANT: ・The engine oil filter should be replaced after the initial 50 hours of operation and then after every 400 hours of operation.

・It is recommended to ask your dealer to replace the engine oil filter, because this operation requires a special tool. But when there is no alternative but to replace the filter by yourself, observe the following instructions.

The engine oil filter (1) is located on the left-hand wall of the cylinder block.

a. Drain engine oil completely.

b. Place a tray or like under the engine oil filter to receive dripping oil when the filter is replaced.

c. Loosen the filter using a filter wrench and remove it.

d. When reinstall the filter cartridge to Engine base, install a new filter with the O-ring lubricated with new engine oil. Tighten the cartridge 3/4 turn by hand after O-ring or gasket touches with flange surface.

Tightening toque: 15–20 N･m (1.5–2.0 Kgf･m)

6. CHECKING OF OIL LEVEL OTHER POINTS

6.1.

Transmission oil

To inspect and replace the transmission oil, remove the transmission cover in front of the engine room.

a. Pull out the oil cap (1) which the oil level gauge (2) is attached.

b. Wipe the end of the dipstick with dry cloth. Insert it again to the oil filling pipe.

c. Pull it out again. The oil level should be between the upper level line and lower level line on the dipstick.

d. On same time, check the deterioration status of the oil.

Inspection plug (2) of oil level is located at the right hand and under side next to the oil cooler. Oil filler (3) is located at next to the drain plug, under side of the engine fan. (Drain plug (1)) of operation.

・It is recommended to ask your dealer to replace the transmission oil, because this operation also requires washing or replacement of the suction filter. But when there is no alternative but to replace the filter by yourself, observe the following instructions.

Oil filler (6) is located at both LH side and RH side of the chain case. (Drain plug (7)) a. Place a tray under the drain plug, (1). b. Remove the drain plug, (1), and let the oil drain out. c. Wrap the seal tape and reinstall the drain plug, (1), and tighten it securely. d. Pour new transmission oil through the oil filler on top of the transmission case until the level reaches the upper limit on the level gauge

Transmission oil capacity: 16.0 L

Oil filler (8) is located at RH side of the rear axle and fill in oil by removing cap. (Drain plug (9)) e. After replacement, start the engine and let it idle for a while. Then stop it and wait for a while until the oil comes down into the oil pan. Now check the oil level if it is at the upper limit or not. When the level is low, replenish until the level reaches the upper limit. f. Make sure that there is no oil leaking through the oil filter, suction filter, rubber hoses, or drain plug,1.

8. SUCTION FILTERS

IMPORTANT: ・The suction oil filters should be cleaned after the initial 50 hours of operation and then after every 300 hours of operation. It should also be cleaned every time the transmission oil is replaced.

7. TRANSMISSION OIL REPLACEMENT

IMPORTANT: ・ The transmission oil should be replaced after the initial 50 hours of operation and then after every 300 hours a. After the transmission oil has drained out completely, remove the filter using the filter spanner. When removing the filter, a small amount of oil may spill, so place waste cloth under the filter to receive spilt oil. b. Apply thin coat of oil to the O-ring of the new oil filter cartridge ahead of time. Then install the filter. Screw in the filter by hand until the rubber packing comes into contact with the sealing surface, and then screw in it by a 2/3 turn with the filter spanner.

・It is recommended to ask your dealer to replace the suction filter. But when there is no alternative but to replace the filter by yourself, observe the following instructions.

The suction cartridge filter (for HST) (1) is located on the middle of the left-hand side of the machine.

The suction filter (for transmission) (2) is located on the front of the left-hand side of the front mower. By removing bolt (3) the filter can pull.

WARNING: Never remove the radiator cap and reserve tank cap during or just after operation. The coolant in the radiator is very hot and highly pressurized, so it may cause burns. Cool down the engine sufficiently before inspecting coolant level.

10. RADIATOR

The radiator is located at the middle of right-hand side of the machine.

a. Remove the radiator screen (1).

b. Wipe off the dust by using a piece of cloth or the like.

c. The clogged radiator fins should be cleaned by applying compressed air or water from both sides alternatively.

9. CHECKING OF COOLANT LEVEL

Check the coolant level in the reserve tank (1) is between the upper (A) and lower (B) limits. If the level is lower than the lower limit, replenish the reserve tank with coolant.

d. Re-install the radiator screen.

IMPORTANT: ・Avoid using excessively compressed air or water, which may deform the cooling fin.

・Avoid applying water directly to the wiring and electric parts.

・After washing the radiator using water, let it dry by natural drying.

(1) Radiator screen

IMPORTANT: ・ The radiator screen and radiator clogged with dust or dirt causes overheating of the engine due to reduced cooling efficiency of the radiator.

・The radiator and radiator screen should be checked for clogging every day before operation.

・When mowing dead grass or operating under extremely dusty conditions, check the radiator screen and radiator several times a day to avoid clogging.

11. COOLANT REPLACEMENT

WARNING: Never attempt to remove the radiator cap during or just after operation, or pressurized vapor and hot water will gush out, which may cause burns. So, wait until the engine cools down sufficiently.

The drain hose of the engine coolant is located on the rear side part of the radiator housing a. Remove the bolt (2) and pull out the radiator drain hose with the drain plug (1). b. Remove the radiator cap (3), disconnect the plug from the hose to let all coolant drain out of the radiator and engine cylinder block. c. When all coolant completely drained out, wash the inside of the radiator and tighten the drain plug securely. d. Pour the coolant which has a specified antifreeze concentration until it starts overflowing through the coolant filler. Retighten the radiator cap securely. Fill the reservoir tank with antifreeze to the upper limit.

Radiator: 6.2 liters Reserve tank: 1.0 liters

(1) Drain plug (2) Bolt

e. After filling, start the engine and let it idle for 5 minutes or so. Then check the coolant level. If the level is low, replenish the reserve tank with coolant.

WARNING: Be sure to tighten the radiator cap securely, or boiling coolant may shoot out, which is very dangerous.

IMPORTANT: ・Frozen coolant may damage the engine.

・Mixing ratio of water and antifreeze is different by antifreeze manufacturers and atmospheric temperatures.

・Water and antifreeze should be blended sufficiently beforehand.

・When replacing coolant (at the engine cool down), remove the air plug and bleed air, otherwise it may result in engine broken. When coolant is full, tighten plug, and replenish coolant from the radiator cap (3).

12. FUEL LEVEL / FUEL FILLING

WARNING:

・When replenishing fuel, avoid the following items, or a fire may be caused.

・Before replenishing with fuel, be sure to stop the engine and wait until the engine and heated parts cool down sufficiently.

・Keep sparks, open flames, etc. away from the fuel tank.

・No smoking.

・Spilled fuel should be wiped away immediately.

Check the fuel level on the fuel gauge (1) on the control panel for SF237. the fuel gauge (2) is installed for SF225. The closer the needle is to " " or “F” the more fuel is in the fuel tank. Therefore, do not let the fuel gauge reach the empty point, " " or “E”.

Fuel tank capacity: 40 liters

IMPORTANT: ・As soon as the fuel gauge shows " " or "E", replenish with fuel. Never attempt to keep on operating with fuel level lower than " " or "E", or air may be trapped in the fuel system, which will cause hard engine starting and poor engine power.

・ Use diesel fuel. Never use heavy oil or gasoline(petrol) or kerosene.

・ Use the diesel fuel which meets the standard and conditions mentioned below.

・Do not use fuel additive.

・ Do not use the diesel fuel which is stored for a long time in an oil drum or home tank.

・ Using unspecified fuel will cause malfunction of fuel filter, injection relating parts and diesel exhaust gas treatment system.

Diesel fuel standard: EN590

Diesel fuel condition

Sulfur content less than 10 ppm

Cetane number more than 45

Fatty acid methyl ester (FAME) content more than 7%

13. FUEL FILTER

SF237

The fuel filter is located at the left side of the machine. Check the filter element for accumulated dust or water in the bottom of the strainer cup.

(SF237)

・ Use only ultra-low-sulfur diesel. In case of using the fuel containing much sulfur, it will be the cause of poisoning DOC and DPF. Then DOC and DPF lose the functions of cleaning exhaust as and raising temperature of exhaust gas.

【Indication of Timing of Water drain out】

Fuel filter has a function to separate water from fuel. Water level reach specified level, indicate warning on the meter panel.

(1) Find the indication on the panel.

(2) Drain water from drain plug at the bottom of filter.

(3) Tighten up the drain cock.

Tightening torque: 0.49-1.47N･m (0.05-0.15kgf･m)

【Filter element replacing procedure】

(1) Drain fuel from drain cock (3).

(2) Loosen the water level sensor unit.

(3) Loosen the filter element (2).

(4) Assemble new filter element.

Tightening torque: 14.7-19.6N･m (1.5-2.0kgf･m)

(5) Assemble the water level sensor unit.

Tightening torque: 4.41-5.39N･m (0.5-0.55kgf･m)

(6) Bleeding air from fuel filter by hand pump (1).

SF225

The fuel filter (1) is located at the bottom left center of the machine. This fuel filter does not have a water separation function or a water amount notification function.

Regularly visually check the strainer for dust and water on the bottom of the strainer cup. If it is dirty, remove the strainer cup and clean.

(1) Fuel strainer (2) cock lever

IMPORTANT: ・Do not reuse the element. Use only genuine filter element.

・Be sure to tighten the water drain plug and check no clearance between filter element and flange.

・Check the fuel line weather fuel leak. If necessary, wipe spilled fuel fully. Fuel leaking will be a cause of fire.

WARNING:

・ Smoking is prohibited when the fuel strainer is being cleaned or inspected.

・ Keep away sparks and open flames from the strainer.

・Spilled fuel should be wiped away immediately.

14. FUEL HOSES

Check the fuel hoses for cracks and fuel leak after every 100 hours of operation. A damaged hose should be replaced with new one.

15. AIR CLEANER

a. The air-cleaner (1) is located to the center left hand side (SF237) / right-hand side (SF225) of the machine. Remove the air-cleaner cover by hand b. Pinch the vacuum valve (2) to eject the dust accumulated inside. When the dust is wet, wipe it off with dry cloth. c. Remove the element (3) from the air-cleaner ASSY. d. Dust it off by patting lightly while holding it with the other hand. e. When the element does not become clean only by patting, blow dust off the element with compressed air. Apply compressed air from inside to outside of the element. f. After cleaning install the element in reverse order of disassembly.

IMPORTANT: ・ Never hit the element against a hard object like a concrete wall.

・An element which has already been washed five times or is damaged should be replaced with new one.

・ Never attempt to start the engine without the air-cleaner element. Such operation will cause engine trouble.

16. CRANKCASE BREATHER (SF237) a. Loosen the case (2) and take out the element. b. Install new filter element. c. Replace the O-ring of the case at the same time. This O-ring is contained in the new filter element. d. Tighten the case.

Crankcase breather (1) is located at the right side of the engine.

The fan belt (1) is accessible from the top of the engine room by opening the engine hood. Check the belt for tension and damage. Check the belt tension with pushing the center the part of belt between the alternator and the crank pulley (A) by hand (Approx. 98 N {10Kg}). The deflection of belt should be 5 – 10 mm.

IMPORTANT: Do not reuse the element. Use only genuine filter element.

*Tightening torque: 9.5 - 10.5 N･m e. Fix the breather to the bracket with three bolts (3).

*Tightening torque: 7.0 - 8.0 N･m

17. FAN BELT CAUTION:

・Before checking the fan belt, stop the engine and remove the starter key without fail.

・Wait until the engine and accessories cool down completely to prevent burns.

(1) Fan belt (2) Alternator (3) Crankshaft pulley (4) Lock bolt (5) Adjust bolt

(SF237)

The alternator (1) is located at the left-hand of the engine. When the belt deflection is improper, correct in the following procedure after removing the air cleaner (2) and the guard net (3).

1. Loosen the alternator pivot bolt (4).

2. Loosen the tensioner bracket bolt (5).

3. Loosen the lock nut (M8) (7) and adjust the adjust bolt (M8) (6). Use to move the alternator to the outside (or inside).

4. Adjust the tension of fan belt (1). Deflection (when pushing 9.8N) A=5~10mm

5. With the rock nut (M8) (7), adjust the bolts (M8) (6). Fix it.

(1) Fan belt (2) Alternator (3) Crankshaft pulley (4) Bolt (M10) (5) Bolt (M8) (6) Bolt (M8) Adjust (7) Nut (M8) Lock

IMPORTANT: If too much tension is applied to the belt drive, the bearing in the alternator will be damaged.

18. BRAKE PEDAL PLAY

CAUTION: securely lock with the lock nuts (3).

・ If you use the brakes a lot during work and driving, the play of the brake pedal will increase. Excessive play affects proper braking performance and is extremely dangerous.

・Before operation, be sure to check the brake pedal play.

Depress the brake pedal (1) and apply the parking brake (2).

3. Release the parking lever (2) and check that the parking lever (1) does not move when the brake pedal (1) is pressed hard.

4. With the brake pedal (1) / parking lever (2) released, check that there is play in the arm (6) of the brake assembly.

Adjust the following procedure

1. Pull up the parking lever (2) by 5 notches.

2. Adjust the left and right rod lengths with turnbuckles (4) so that the spring gap (5) is 0.6 mm. After adjustment,

(3) Lock Nuts (4) Turnbuckle (5) Spring (HE060) (6) Brake arm

19. NEUTRAL POSITION OF HST

CAUTION: After a long time of use, the neutral position of the HST unit can shift, which will cause various troubles such as difficulty in stopping the machine, changing over between forward travel and reverse travel, etc., which is very dangerous.

IMPORTANT: When the HST unit is out of order, ask your dealers to repair it. But when there is no alternative but for the user to adjust it, follow the next instructions.

The HST adjustment plate is located in the left side of the machine. With this plate the neutral position can be adjusted.

(1) Lock Nut (2) Plate

SF225, 237

a. Detach the mower deck from the machine.

b. Place the front mower on level, hard ground. Put tire chocks in the positions a little apart from the front wheels and rear wheels.

c. Before adjustment, make sure that the engine is stopping to prevent accidents.

d. When the front mower creeps without depressing the HST travel pedal, adjust the Plate (2) by loosen the Nut (1). When the front mower creeps forward, rotate the Plate (2) to clockwise. When the front mower creeps reverse, rotate the Plate (2) to counterclockwise. Then tighten it temporarily with the lock nut.

e. Start the engine and hold the throttle lever in an intermediate position between the High-speed position and the LOW speed position.

f. Release the parking brake.

g. When the front mower does not start moving, it shows that the neutral position is properly set.

h. Stop the engine and apply the parking brake. Tighten the temporarily tightened lock nut securely.

20. FUSES AND WIRING

20.1. Main fuses

The fuse box, 2, is located under the seat, 1.

20.2. Slow-blow fuse / Engine fuses

The slow-blow-fuses located left hand of the machine beside of the battery for SF237.

(3) Slow-blow fuse (60A) (for generator)

(4) Slow-blow fuse (40A) (for lamp)

(5) Slow-blow fuse (40A) (for main)

(6) Slow-blow fuse (40A) (for radiator fan)

1. The slow-blow fuse boxes are located at left hand side of the frame of engine room. To replacing 60A and 50A slow blow fuse, follow the steps:

2. Loosen the bolt. Bolt for 60A - 2 Bolt for 50A - 3

CAUTION: Never replace blown fuses or slow-blow fuse with wire.

IMPORTANT: ・When a fuse or a slow-blow fuse is blown, be sure to find the trouble and correct it. When the cause is not clear, consult your dealer.

・Be sure to use specified fuses. Larger capacity fuses will cause burn-out of electric accessories and wiring.

20.3. Wiring

CAUTION:

・ The wiring of the machine should be checked every year at your dealer to avoid electrical fires.

・ Grass and dust around the battery, wiring, muffler and engine should be removed. Otherwise they may catch fire.

IMPORTANT: ・Damaged wire covers should be mended with insulation tape immediately.

・When a wire harness has come off its clamp, it should be re-clamped immediately. Harness coupler for beacon lamp, is located in the behind of the oil cooler.

21. BATTERY

■ INSPECTION OF BATTERY

The battery (1) is installed on the middle of the left-hand side of the machine.

Check if the electrolyte level is between the upper and lower limits. If the level is below the lower limit, remove the battery, paying attention to the following points, and replenish distilled water from the refill plug (2) to raise the level to the upper limit. b. As the battery discharges even when it is not used, it should be charged every month or every other month at least. c. When storing front mower for long period without operation, self-discharge of battery will happen (especially in winter). If the front mower is stored for more than 1 month, the battery minus terminal should be disconnected.

・Be sure to connect the battery terminals correctly.

・The wiring from the battery should be kept clean and connectors tight. Dirty or loose wiring may cause a fire.

・When disconnecting the battery, disconnect the negative terminal first and vice versa when connecting.

When operating for the first time or after long term storage, check if the battery charge level is enough. (If measurement of battery voltage is available, check if the voltage is more than 12.5V.) When the front mower is stored more than 6 months, charge the battery.

IMPORTANT: ・Avoid quick charge of battery. Or it will shorten the service life of the battery.

・When replacing the battery, use a battery of the same capacity as that of the current one

・When using booster cables, take sufficient safety measures.

・Do Not throw away the battery to the garbage can. Recycle it to follow the law of your community.

(1) Battery (2) Filler plug

A: Upper limit

WARNING:

B: Lower limit

・The battery generates very explosive gases, so avoid smoking and keep sparks and open flames away from the battery. Charging the battery should be done in a place well ventilated to disperse explosive gasses as quickly as possible.

・Battery electrolyte is very corrosive and will cause burns, so if it splashes on skin or clothes, wash it off immediately. If acid contacts eyes, flush immediately with clean water and get medical attention.

CAUTION:

・Never attempt to keep on using or charging the battery with an electrolyte level lower than the limit, or the battery may explode or its service life be shortened due to deterioration inside the casing.

・The electrolyte level should always be kept between the upper and lower limits. A too high level will cause the electrolyte to overflow and corrode other parts.

■ HANDLING OF THE BATTERY

a. As atmospheric temperature lowers, the performance of the battery also lowers. Consequently, the battery should be serviced with special care in wintertime.

22. WHEEL TIGHTENING BOLTS AND NUTS

Check the wheel tightening bolts and nuts for looseness All bolts and nuts should be tightened to the specified torque.

Specified tightening torque (Bolt):

Tighten the bolts near the maximum level and tighten again so that the groove and hole aligned together, insert the cotter pin through the hole and groove, sprit the edge of it.

23. TIRE PRESSURE (INFLATION)

Improper tire pressure causes abnormal wear of the tires and affects the front mower performance. Too high pressure causes the front mower to bounce too much and too low-pressure increases travelling resistance, which leads to power loss.

Tire pressure should be checked every day.

CAUTION:

・Tire inflation should be set to the values specified in this manual. Excessive inflation may cause explode, which may result in serious accidents.

・Insufficient pressure in the tires causes uneven tire wearing that can shorten tire lifetime.

・When a tire, tube, or rim is required for replacement, ask your dealer. Such operation should be done by a trained mechanic especially for tire handing.

・Never use a tire with a cut or crack which reaches tire cords as such a tire may explode.

24. STEERING / TOE-IN

Start the engine and turn the steering wheel lightly in both directions to check the wheel turns smoothly.

Make sure the tire toe-in is set properly. Inappropriate toe-in can result in abnormal tire wear and unstable tearing.

Toe-in: A-B = 2 to 6 mm (0.08 to 0.23 in.)

IMPORTANT: When any abnormality is found with the steering wheel or toe-in of the tires, ask your dealer to correct it.

(1) Harness coupler for beacon lamp (2) Oil cooler

IMPORTANT: When hydraulic system parts such as the HST unit, hydraulic pump, control valve, hydraulic cylinder, piping, etc. are required to be adjusted or repaired, consult your ISEKI dealers. Users are advised not to adjust or repair hydraulic system parts by themselves.

25. OIL COOLER / HYDRAULIC SYSTEM PARTS

The oil cooler is located in front of the engine and above the transmission case. Periodically remove the oil cooler net (1), remove grass, debris, etc. to ensure air flow.

26. SAFETY SWITCHES

Safety devices are installed for safe operation. Make sure that each device works properly before operation following procedures.

IMPORTANT: When the engine does not start due to a defective safety switch or does not stop when the operator has left the operator's seat, consult your dealer.

INSPECTION 1 a. Be seated in the operator's seat. b. Turn the starter switch to the START position without depressing the brake pedal. Make sure that the engine is not cranked.

Inspection 2

a. Be seated in the operator's seat.

b. Depress the brake pedal fully.

c. Turn the starter switch to the START position. Make sure that the engine is cranked and started.

d. Leave from the operator's seat. Make sure that the engine should stop.

27. WASHING OF THE MACHINE

CAUTION: If you use compressed water, be sure to use in accordance with this operator’s manual and safety label. In case of irregular use, it may cause personal injury and damage to the machine.

IMPORTANT: Set the spraying nozzle in ‘spread’ position and keep the distance away from the machine more than 60 cm in order to avoid damage to the machine. Especially, be care not to hit the compressed water to electrical parts and label.

Unsuitable washing may cause the following accidents;

1. Fire as a result of short circuit or the damage to the electrical parts.

2. Oil leakage as a result of the damage to the hydraulic hose.

3. Damage to the machine.

(1) Label peeling.

(2) Accident occurs by the damaged electrical parts, engine, radiator, and interior.

(3) Lubber parts (tire, seal) and resin parts are damaged.

(4) Paint peeling.

CHAPTER 9. STORAGE

1. DAILY AND SHORT TERM STORAGE a. Clean the front mower. b. Lower the mower deck on the ground. c. The front mower should be stored indoors if possible. When it has to be left outdoors, cover it with tarpaulin or the like. d. When the ambient temperature is very low, remove the battery and store it in a warm shaded dry place. This will help to easy start of the engine the following morning.

IMPORTANT: When washing the front mower, avoid splashing compressed water directly to the electric parts, and fuel fillers. Remove the starter key and cap the switch key hole to prevent short circuits.

CAUTION: A lifted up mower deck may go down unexpectedly if the lift lever is operated by children or unauthorized people, which may lead to serious accidents.

CAUTION: When covering the front mower with tarpaulin, wait until heated components such as the engine, muffler, etc. have completely cooled down. Otherwise a fire may be caused.

CAUTION:

・Remove the starter key without fail before storage.

・Always clean up accumulated grass or leaves around heated parts, such as muffler, engine and brake, and around terminals of battery, which have possibility of leakage of electricity by water. Otherwise, it may cause a fire.

2. LONG TERM STORAGE a Clean the front mower and correct all troubles such as repair, replacement of defective parts, readjustment, etc. b. Top up the fuel tank and close the fuel cock. c. Replace the engine oil with new and let the engine idle for about 5 minutes to lubricate every part in the engine sufficiently. d. Lubricate all lubrication points. e. Grease up all greasing points. f. Check bolts and nuts for looseness and re-tighten loose ones. g. Inflate each tire a little higher than specified. h. Dismount the mower deck or lower it to the ground. i. Cover the front mower with tarpaulin or the like in order to protect it from rainfall and dust. j. Remove the battery, charge it, and store it in a shaded dry place with no access to children. k. Charge the battery completely every month.

CAUTION: Remove the starter key without fail before storage.

3. OPERATION AFTER A LONG TIME OF STORAGE a. Perform the pre-operation inspection without fail. b. Let the engine idle for about 30 minutes before applying any load, to ensure maximum engine performance and service life.

CAUTION: Provide sufficient ventilation for exhaust fumes when starting the engine, because such fumes are very poisonous.

1. ENGINE

CHAPTER 10. TROUBLESHOOTING

Troubles

・ Starter motor does not work.

Presumable causes

・ Operator is not sitting on the seat.

・ Engine food is opened.

・ Brake pedal is not depressed.

・ Battery is not charged fully.

・ Battery terminals are poorly connected.

・ Defective internal wiring in connector

・ Defective safety switch of seat

・ Broken starter switch

・ Broken starter motor

・ Starter motor works but engine does not start.

・ Cock of fuel filter is closed.

・ No fuel

・ Water trapped in fuel

・Air trapped in fuel

・ Clogged fuel hoses

・ Clogged fuel strainer

・ Slow cranking speed

・ Insufficient pre-heating

・Throttle lever is in low speed position.

・Too high engine oil viscosity

・ Clogged air-cleaner

・ Insufficient compression

・ Incorrect injection timing

・ Clogged injection nozzles

・ Engine runs at irregular speeds or stalls soon.

・Air trapped in fuel system

・ Improper earthing

・ Clogged fuel strainer

・ Leaking fuel system

・ Defective injection pump

・ Engine knocks.

・Too low engine oil level

・ Engine is overheated.

・ Coolant temperature does not rise.

・ Defective injection pump

Remedies

・ Operator sits on the seat.

・ Close the engine food completely.

・ Depress it fully.

・ Charge it.

・ Clean the terminal posts and connect them securely.

・ Rewire.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Open it.

・ Replenish with fuel.

・ Drain trapped water from fuel filter.

・ Bleed injection pump.

・ Clean fuel hose inside.

・ Wash or replace it.

・ Charge battery.

・ Preheat for specified time.

・ Shift the throttle lever to middle speed position. (middle of "Hi" and "Low")

・ Replace it with one of lower viscosity.

・ Clean element.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Locate cause of air-trapping and bleed system of air.

・ Polish earthing points and re-connect.

・ Clean or replace it.

・Tighten joints securely or replace damaged hose.

・ Consult your dealer.

・Add oil to upper limit.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

Troubles

・ Engine knocks.

・ Engine output is insufficient.

Presumable causes

・ Defective injection nozzles

・ Incorrect valve clearances

・ No fuel

・ Clogged air cleaner

・ Engine is overloaded.

・ Improper fuel

・ Engine is overheated.

・Throttle lever is not in the high speed position.

・ Insufficient compression

・ Improper valve clearances

・ Defective injection pump

・ Defective injection nozzles

・ Incorrect injection timing

・ Engine is overheated.

・ Low engine coolant level

・ Clogged radiator fins and screen

・ Low engine oil level

・ Clogged air-intake openings

・ Engine is overloaded.

・ Clogged engine oil filter

・ Oil pressure lamp is blinking

・ Low engine oil level

・ Low engine oil viscosity

・ Clogged engine oil filter

・ Defective oil pump

・ Defective oil pressure switch

・ Exhaust fumes are white. ・ Clogged air cleaner

・Too high engine oil level

・ Insufficient fuel injection

・ Exhaust fumes are black. ・ Defective fuel

・ Clogged intake system

・ Exhaust fumes are black. ・ Clogged exhaust system

・ Excessive fuel injection rate

・ Insufficient injection nozzle pressure

・ Incorrect injection timing

・ Engine stalls at low speed. ・ Defective injection pump

・ Defective injection nozzles

・ Incorrect valve clearance

Remedies

・ Consult your dealer.

・ Consult your dealer.

・ Supply with fuel.

・ Clean element.

・ Raise cutting height or slow down front mower.

・ Use proper diesel fuel.

・ Cool down engine.

・ Shift it there securely.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Replenish

・ Clean them.

・ Replenish engine oil to upper limit.

・ Clean air-intake.

・ Raise cutting height or slow down front mower.

・Ask your dealer to replace it with new one.

・Add oil to upper limit.

・ Replace with oil of higher viscosity.

・Ask your dealer to replace it with new one.

・ Consult your dealer.

・ Consult your dealer.

・ Clean element.

・ Drain oil to upper limit.

・ Consult your dealer.

・ Use proper fuel.

・ Clean air cleaner element.

・ Check muffler for clogging and clean it.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Engine races.

・ Clogged governor

・ Engine oil leaks into cylinder.

・ Consult your dealer.

・ Consult your dealer.

Troubles Presumable causes Remedies

・ Excessive fuel consumption

・ Defective fuel

・ Clogged air-intake line

・ Engine is overloaded.

・ Fuel leaks

・ Incorrect valve clearances

・ Use proper fuel.

・ Clean air cleaner and air-intake hose inside.

・ Raise cutting height or slow down front mower.

・ Replace damaged parts with new ones and tighten joints securely.

・ Consult your dealer.

・ Charge lamp is blinking.

・ Defective wiring

・ Lower electrolyte level

・ Loose fan belt

・ Defective alternator

・ Correct loose, dirty, short, improperly earthed terminals.

・ Replenish with distilled water to upper limit.

・Tighten it properly.

・ Consult your dealer.

2. BRAKE SYSTEM

Troubles Presumable causes Remedies

・ Defective braking effect or uneven braking

・ Brake pedal does not return smoothly.

3. LIFT SYSTEM

・ Excessive brake pedal play

・ Worn brake linings

・ Improperly adjusted brake rods

・ Fatigued or broken return spring

・ Defective lubrication of linkage

・ Correct pedal play.

・ Consult your dealers.

・ Correct rod length.

・ Replace it.

・ Grease grease up points.

Troubles Presumable causes Remedies

・ Lift does not rise.

・ Lift does not rise.

・ Low transmission oil level

・Air trapped inside hydraulic piping

・ Clogged hydraulic oil filter

・ Clogged suction filter

・ Defective hydraulic pump

・ Defective control valve

・ Defective hydraulic cylinder

・ Fill up to upper limit.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Lift does not lower.

・ Lift lock is engaged

・ Defective control valve

・ Seized lift shaft

・ Release it.

・ Consult your dealer.

・ Consult your dealer.

Troubles

・ Steering wheel is very heavy to turn.

Presumable causes Remedies

・ Low tire pressure

・ Low transmission oil level

・Air trapped inside hydraulic piping

・ Clogged hydraulic oil filter

・ Clogged suction filter

・ Defective hydraulic pump

・ Defective power-steering unit

・ Correct it as specified.

・ Fill up to upper limit.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Steering wheel has a tendency to turn in one direction.

・ Excessive steering wheel play

・ Uneven tire inflation

・ Improper toe-in

・ Excessively worn tie-rod ends

・ Excessively worn tie-rod ends

・ Excessively worn steering wheel column shaft

・ Defective power-steering unit

・ Inflate both front and rear tires to specified pressure.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

Troubles

・ Front mower does not start travelling.

Presumable causes Remedies

・ Parking brake is applied.

・Too low engine speed

・ Low transmission oil level

・Air trapped inside hydraulic piping

・ Improperly adjusted HST pedals

・ Clogged hydraulic oil filter

・ Clogged suction filter

・ Defective HST unit

・ Release it.

・Accelerate engine.

・ Fill to upper limit.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.

・ Front mower creeps without HST pedals being operated

・ Stuck neutral arm

・ Incorrect neutral point of HST

・ Improperly positioned neutral arm

・ Defective HST unit

・ Lubricate.

・ Consult your dealer.

・ Consult your dealer.

・ Consult your dealer.