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Grillo Climber 9.22 Operator Instructions


Thank you for choosing the Grillo Climber 9.22. We hope that this ride on mower will perfectly meet your requirements.  For best use and maintenance over time, please carefully read and follow the instructions given in this manual. You may also refer to the online Use and Maintenance Manual PDF which has diagrams and pictures (downloaded from

This will enable you to get top results from your machine and will prevent avoidable expense. Please look after the printed manual which should always be kept with the machine.


The Grillo Climber 9.22 is a brush-cutter designed for cutting short or long grass on hills and steep terrain.

Caution is the best tool for accident prevention.

You are urged to read the following instructions for use of the mower before starting work.

Incorrect use of the mower and its equipment may cause damage. To reduce this risk, follow the precautions given below:
1) Read the whole of this before turning on and using the grass-cutter, before starting any work at all. 
2) Pay particular attention to the warnings and safety labels set out around the grass-cutter.
3) Blades rotation is highly dangerous: never put hands or feet under mower.
4) Before allowing others to use the grass-cutter, inform them of the safety rules and carefully instruct them on how to use the machine.
5) Do not mow when children or others are around (minimum distance 15 metres).
6) Before backing up, look down and behind the machine carefully to make sure people (especially children) or obstacle are not around.
7) Before starting work, put on suitable working clothes, gloves, strong shoes and protective glasses.
8) Wear a suitable protective device such as earplugs.
9) Before mowing, clear area of objects such as stones, sticks or other that may be thrown by blade and become a danger.
10) If you hit an object, stop the machine: disengage the blade, turn off the engine, remove the ignition key and inspect the brush-cutter. If the machine vibrates, have it repaired.
11) Before getting off the mower, turn off the engine, turn off the PTO, remove the ignition key and lower the cutter deck in the lowest position.
12) Always drive slowly along uneven paths. 
13) Keep the speed down when driving down slopes. 
14) Always turn slowly when driving downhill.
15) The user is always liable for any damage caused to third parties. 
16) Deformed or damaged blades must always be replaced, never just repaired. 
17) Always use original GRILLO spare parts and accessories.
18) Only operate during daylight or with good artificial light. 
19) Only store fuel in suitable containers designed for the purpose. 
20) Be very careful when working close to a road.
21) Allow engine to cool before storing in any enclosure.
22) Do not operate machine if you are tired or under the influence of drugs or alcohol.
23) Do not allow any fuel spillage and after filling the tank wipe away any spilled fuel before starting the engine.
24) Do not tamper with the safety devices or disable them.
25) Do not change the engine settings, especially the maximum number of revs.
26) Do not rest heavy loads on the seat, the starter safety device could become disengaged. 27)Never attempt any adjustments or cleaning with the engine running.
28) Never allow anyone to check the machine while you are seated at the controls with the engine running.

29) Do not allow passengers to ride on the machine.
30) Do not allow under-age children to operate it; use is prohibited to children under 16 years old.
31) Do not operate the grass-cutter near to ditches or verges which could collapse under the weight of the machine, especially when the surface is loose or wet.
32) Replace worn or damaged exhausts.

The above mentioned warnings could not be enough to avoid any risk, if the operator does not use the present grass-cutter correctly. 
Therefore, for your safety we give you following advice:

33) The blade is very dangerous when rotating, never put hands or feet underneath the cutter deck.
34) Do not drive in reverse at high speed.
35) It is dangerous to operate the steering wheel abruptly with the engine at full power.
36) Fill the tank with fuel before starting the engine. Only refuel outdoors, always turn off the engine, keep away from sparks or naked flames, do not smoke! Always replace the cap on the fuel tank and those on fuel containers properly.
37) If the fuel tank has to be emptied, only do so outdoors.
38) Do not operate the grass-cutter over gravel which could become sucked up and drawn into the blade, becoming very dangerous.
39) At the presence of children, hide the ignition key after using the machine.
40) CAUTION: to avoid the risk of fire, keep the engine compartment, exhaust, discharge outlets, battery, tank area and fuel pipes free from grass, leaves, dirt etc.
41) Never store the machine with fuel in the tank inside a building where fumes may reach an open flame or spark.
42) Disengage the cutter deck transmission, turn off the engine and disconnect the spark plugs:
a) before cleaning obstructed points.
b) before checking or repairing the brush cutter.
c) when the machine hits a foreign body (check the cutter deck to see if it is damaged).
d) if abnormal vibration occurs, stop and inspect the machine. Contact the nearest authorized service centre if you need help.

Climber 9.18 - 9.22 has a label under the instrument panel indicating the machine's serial no.

This manual provides instructions for use and basic maintenance of the brush cutter by the user. 
For operations that are not described in this manual contact your Area Dealer.

Only use original spare parts. These are the only parts that ensure safety and interchangeability. Always quote the machine’s serial number and the code number of the part to be replaced when ordering spare parts. For engine parts, follow the indications given in the specific manual.

Guarantees are given in compliance with current law relating to Australia. The dealer will have to give the client a copy of the registration certificate of the machine, which they will print up from the Agrigarden website.

For the engine the warranty of the relative engine manufacturer applies.

2 x cutting blades 2 x blade screws
2 x blade screw nuts 1 x set of belts
1 x air filter for engine 1 x oil filter for engine

Grillo Climber 9.22 B&S INTEK 7220 PROFESSIONAL SERIES 22 HP gross power  – 18 HP net power 656 cm³,  OHV, twin-cylinder, internal combustion.
STARTING SYSTEM: electric with 12V battery.
GEARBOX: hydrostatic transmission.
DIFFERENTIAL: with lock device.
CLUTCH: electromagnetic with P.T.O and with blade brake.
GROUND SPEED: from 0 to 10 km/h with continuous variation and reverse from 0 to 6 km/h.
TYRES front: 13×5.00-6 rear: 17×8.00-8
BRAKE: front emergency brake and rear parking brake. OPERATOR SEAT: adjustable comfort seat with armrests. CUTTING DECK: rear/side discharge.
CUTTING SYSTEM: rotating with 1 blade.
CUTTING WIDTH: 910 mm (±36'')
CUTTING HEIGHT: from 30 to 70 mm with 4 different cutting positions and 1 transfer position at 90 mm.
WORK CAPACITY: approx. 7200 m²/h (± 1.7 acres per hour)
STEERING RADIUS: 380 mm (±14.9'')
FUEL TANK:  13 litres RESERVE: 3 litres
ATTACHMENTS: turf wheels set, 110 cm (±43’’) Quick Shift cutting deck with mulching and rear discharge, mulching kit for 91 cm (±36’’) cutting deck.
SIZES: Length > 1800 mm (± 71'') – Width > 990 mm (± 38.9'') – Height > 1070 mm (± 42.1'')
WEIGHT: 307 kg (± 675 lb)

1) Check that the machine has not been damaged in transit.
2) Check the oil levels of the engine, hydrostatic transmission and final drive.
3) Check the tyre pressure: 1 BAR front wheels 13×50/6 – 1.5 BAR rear wheels 17×8.00-8
4) Check the battery voltage; it must be at least 12,5 Volts. If necessary, charge the battery with a battery charger set at 12 volts on slow charge for 2 hours.

IMPORTANT! During assembly take care not to reverse the polarity of the battery.

The gases released by the battery are explosive, keep it away from open flames or sparks. Check the liquid level periodically and keep the terminals lubricated with appropriate grease.

Change the engine oil and filter after the first 20 working hours. Check that there are no oil leaks or loosen screws, especially those which fix the blade, the steering and the wheels. Adjust the tension of the hydrostatic transmission belts (fig. 16).

Refer to online Use and Maintenance Manual PDF which can be downloaded from 

Before starting up the engine, always check that:
The engine oil level is correct (fig. 2)
The oil in the hydraulic engine is at the correct level (fig. 3)
The forward level is in neutral position (fig. 1B, no. 2)
The engine cooling intake grids are clean (fig. 5)
Air filter is clean (fig. 6)
The cutter deck is clean
The hydraulic engine fins are clean (fig. 7)
The blades are sharp and firmly fastened in place
The screw in the centre of the blade hub is safely tightened (fig. 1C, no.3) Fill the fuel tank using a funnel with very fine filter (fig. 1A, no. 4).

Push the throttle half way in (fig. 1B, no.5).
If the engine is cold, use the choke (fig. 1B, no.6). Turn the ignition key on the dashboard (fig.1, no. 7).
Once the engine has started, turn off the choke and wait for a few minutes to allow the engine to warm up.
To switch off the engine put the ignition key in the STOP position (fig.1, no. 7).
Important: When moving the mower from one place to another, keep the cutter deck at the maximum height setting.

Choose the desired cutting height using the lever (fig. 1D, no. 8). Suitably accelerate the engine and engage the PTO lever (fig. 1, no. 1). Gently operate the forward lever (fig. 1B, no. 2) and start work.
To stop, return the forward lever to the stop position. The forward lever can be returned to the stop position by pushing the brake pedal too (fig. 2, no. 1).
The lever (fig. 1B, no. 2) is also used to reverse. When it is moved back, the machine moves backwards – always operate it gently. Releasing the lever, this turns back automatically to the neutral position.

The front brake (fig. 23, no. 1) must be used only as emergency brake on slopes to avoid the sliding of the machine. When it is used together with the differential lock, it makes the machine very steady on slopes. The forward lever is normally used to slow down and to brake.

To engage the parking brake, please press the lever upwards and lock it to the proper seal retainer (fig. 23, no. 2). In this position, if the forward lever is engaged, a warning buzzer warns that the parking brake is engaged. To adjust the parking brake, use the castellated nut (fig. 22).

To adjust the cutting height use the lever (fig. 1D, no. 8). The deck can be set in 4 different cutting positions from 30 to 70 mm and 1 transfer position at 90 mm. in which the blade disengages automatically (fig. 1D). To engage the blade again use the button (fig. 1, no. 1). In case of uneven ground, humps or dips, the deck should be kept in the highest cutting position to prevent knocks by the blade.

If possible, steep slopes must be mown in the up/down direction, taking great care when turning that the wheels upstream do not strike obstacles (stones, branches, roots, etc.) which might cause the machine to tip, or lead to loss of control. If the drive wheels loose adherence, engage the differential lock (fig. 8). Study mowing area. Set up a safe mowing pattern. Do not mow where traction or stability is doubtful since the machine might slip. Downhill, set off at low speed and do not pass over dry or cut grass since the wheels lose grip.

The machine is equipped with the new hour meter (fig. 1, no. 8). This hour meter has three different functions:
1) It always shows the no. of hours worked, even when the key is not inserted.
2) It displays the no. of hours to the next engine oil change (OIL CHANGE IN...HS). The first oil change must be carried out after the first 20 working hours than every 100 working hours. The indicator “OIL CHANGE” flashes automatically when it is necessary to change the oil.
3) It displays the no. of hours to the next lubrication (LUBE IN...HS). Lubrication must be carried out every 50 working hours. The indicator “LUBE” flashes automatically when lubrication must be carried out.
By pushing the white button you can choose the function to be displayed on the hour meter.

Remember that the engine will stop whenever the operator gets up from the seat. The engine will not start up if:
The blade is engaged.
Nobody is sitting in the driver’s seat.
If the cutting deck is not at the highest setting.

1) Never strain the engine: when fumes are emitted from the exhaust it means that it is being strained. Slow down.
2) Do not leave the machine out in the rain.
3) If the machine heats up on the first day at work, stop it and allow it to cool down: it needs to rest.
4) Frequently sharpen the cutting blades: the cut will be better and the engine will not be strained that much.
5) Check the area before mowing to make sure that there are no stones, sticks or foreign bodies.
6) Keep the engine at peak r.p.m. during mowing, adjust the speed according to the height of the grass.
Keep the grids above the engine and the cooling fins of the hydraulic motor (fig. 5 – 7) clean.

Disconnect the plugs before performing any cleaning, maintenance or repair operation. Always wear suitable clothing and working gloves.
When the machine or part of it is lifted to carry out maintenance operations, always remember to use suitable fixing tools such as holders and safety locks.
When carrying out maintenance operations and/or when the machine is tilted without safety locks or supports, never leave it unattended where inexperienced people and children could have easy access to it.
Protect the environment: carefully dispose of used oils, petrol and any other pollutant product!
Effective maintenance and correct lubrication help to keep the machine fully efficient.

For the lubrication intervals, follow the instructions provided in the engine handbook; the oil must in any case be changed after the first 20 working hours and then every 100 hours, using SAE 30 engine oil. To remove the oil unscrew the tap A (fig. 20B). Change the oil filter (fig. 10).

Check the oil level every 100 hours by unscrewing the cap (fig. 11, ref. A); if necessary top up with 80W90 (API GL-5) gearbox oil. To drain the oil, unscrew the cap (fig. 11, ref. B). Change the oil every 1000 hours. Quantity 1,9 Lt. (fill through the tap fig. 11, ref. A).

Check the level in the expansion tank when the motor is cold. It should come up to the level notch (fig. 3). If necessary add 15W50 or 20W50 oil. Change the oil every 200 working hours. To drain the oil, unscrew the cap (fig. 4) and pour into the tank. Keep the fins and coil of the hydraulic motor thoroughly cleaned (fig. 3A – fig. 7). Quantity 1 litre.

Check the air filter every 4 hours, or more frequently if working in a very dusty environment (fig. 6). Check the air intake grid for engine cooling (fig. 5). The external and internal grids must always be kept clean to avoid blocking the air flow needed for the engine cooling. Keep the engine compartment, the hydrostatic transmission and the intake grid clean.

A blunt blade tears the grass, leaving it unattractive. 
The cutting edges of both blades must be sharpened. 
To remove a blade, take hold of it firmly, wearing work gloves, and unscrew the central  screw, remembering that the screw has a right-hand thread (fig. 1C, no. 3). 
Sharpen both cutting edges using a medium-grain grinding wheel and check that the blade is balanced by standing it on a round bar inserted in the central hole. Fit the two cutting blades following the diagram (fig. 13).

Firmly tighten the fixing screw (fig. 1C, no. 3). Always replace damaged or crooked blades: Never attempt to repair them! When fitting, always follow the diagram (fig. 13).ALWAYS USE ORIGINAL BLADES! If they are worn they can be turned round since they have two cutting edges.

Levelness of the cutting deck is essential in order to obtain an evenly mown lawn. 
Park the mower on a flat surface and check that the tyre pressure is correct. 
Adjust the right and the left adjustment devices so that the edge of the cutting deck is at the same distance from the floor that is 170 mm (fig. 24) on both sides with the operator sitting on board (fig. 14 – 14A) and with the mower deck in the highest cutting position. If you are unable to level off the deck, contact an Authorised After-Sales Service Centre.

BLADE BELT 910 mm cutter deck
The engine – blade belt is self-adjusting. Therefore no adjustment is required. Simply check the spring tension (fig. 15). If the belt becomes twisted or comes off, check the parameters below, keeping the cutter deck in the highest position (“transfer” position):
1) 170 mm from the edge of the deck to the ground (fig. 24).
2) 170 mm from the rear edge of the deck to the ground (fig. 24).
3) Adjust the registers (fig. 14 – 14A).
4) Take care when positioning the belt guides; move them towards the belt, checking the cutter deck at the various height settings (fig. 12, ref. A). Check that during operation the belt is always in the centre of the stretcher (fig. 15, ref. A). The stretcher has to stick about 5/8 mm out of the frame (fig. 25).

This cutter deck with 3 blades has a cutting width of 1100 mm and has two functions: rear discharge and mulching. If you want to change from rear discharge function to mulching function just use the lever without changing the blades (fig. 26 – 27). The cutting height can be chosen electrically pushing the button on the dashboard (fig. 36).

To ensure the deck belt works properly and to obtain a uniform cut, please follow these instructions:
Put the cutting deck in the lowest position.
Adjust the front arms (fig. 34) in order to set the front part of the cutting deck at 35 mm from the ground (fig. 28): measure the point A (fig. 29).
Regulate the adjusting device (fig. 35) in order to set the rear part of the cutting deck at 35 mm from the ground (fig. 30): measure the point B (fig. 29).
To check the cutting deck belt, unscrew the screw (fig. 31, ref. D) and remove the two protections. If you see that the length of the belt has changed, causing therefore its malfunctioning, you can regulate the belt tension using the adjusting screw (fig. 32). If you want to replace the belt, please see the diagram (fig. 33) to re-assemble it. The spring has to be adjusted at 77 mm (fig. 32, ref. B). The stretcher has to be lubricated every 50 working hours (fig. 32, ref. C).

Whenever there is a change in belt length (causing therefore its malfunctioning), the tension can be regulated by means of the adjustment device (fig. 16). Take care not to compress the spring beneath the unit completely; belts must be neither too tight nor loosen. The spring must be kept set at 44 mm and it is indicated by the red arrow (fig. 16)

Rotation is started and stopped using the switch (no. 1, fig. 1). When rotation is engaged, the engine must be running at medium r.p.m (see throttle sticker) and the machine must not be in the grass for cutting. Never start the blades with the engine at maximum r.p.m. The machine is equipped with an electromagnetic clutch which also brakes the blade during disengagement. The blades are also disengaged automatically when the cutting height adjuster lever is moved to the highest position.

The movement is transmitted from the motor to the hydraulic transmission and to the blades by means of two v-belts. Replace the belts as soon as they show signs of wear! Their replacement and subsequent adjustment are fairly complex procedures and must be carried out by an Authorised After- Sales Service Centre. For the cutter deck – engine belt, the belt guides of the deck pulley have to be removed; release the belt stretcher spring (fig. 15, ref. B). For the two transmission and hydraulic engine belts proceeds as follows:
-remove the rear and top grids
-undo the belt stretcher nut (fig. 16)



The traction release device is located behind the seat; in case of emergency, to allow it to be towed or moved by hand, move the lever outward (fig. 20A). In the position shown (fig. 20B) the machine is in working condition. Check that during working the hydraulic engine piston does not remain pressed down; if necessary, adjust the nut (fig. 21).

The differential lock has to be activated when the pedal is half way of its travel (fig. 8). To adjust the activation point of the differential lock use the screw (fig. 9).

Refer to online Use and Maintenance Manual PDF which can be downloaded from 

Refer to online Use and Maintenance Manual PDF which can be downloaded from 

Refer to online Use and Maintenance Manual PDF which can be downloaded from 


Dashboard OFF with key in “AVV.” (ON) pos.
Battery not supplying power – Check connecting cables
Check electrolyte level
Recharge battery
Change the fuse

Dashboard ON, but starter motor does not turn over with key in “AVV” (ON) pos.
Battery not supplying enough power – Recharge battery
Start-up go-ahead not given – Travel lever in stop position
Disengage blades
Sit in the driver’s seat

Difficult starting or irregular running of engine
Carburettor problems – Clean or change the air filter
Adjust the carburettor (follow engine manual instructions)
Deposits or dirt in fuel - Empty the tank and use fresh petrol
Check and change the petrol filter if necessary

Starter motor turns over but engine does not start
No petrol flow – Check  that  the  choke  has  been activated (if engine is cold)
Check petrol level in tank
Check wiring of carburettor opening control
Check petrol filter (and change if necessary)
Check that the vent on the tank cap is not blocked

Fault in ignition system – Check  that  the  caps  of  the  spark plugs are correctly fastened
Check that the electrodes are clean and at the correct distance apart.

Drop in engine performance during cutting
Speed too high for cutting height – Reduce speed

When the blades are engaged the engine cuts out

Go-ahead not given for blade engaging
Check the blade-engaging microswitch
Sit in the driver's seat

Uneven cutting
Cutting deck not parallel to ground – Check tyre pressure
Level off the deck
Blades fault – Check that the blades are correctly mounted
Sharpen or change the blades
Check the tension of the cutting deck  engine belt

Vibrations during operation
Blades unbalanced – Balance blades or replace if damaged
Fastenings are loose – Check and fasten the blade fixing screws as well as the fixing screws of the engine and chassis.

When PTO button is pressed, the blade does not engage

Incorrect P.T.O. engagement

Check the battery voltage, it must be at least 12,5 volts

Check the levelness of the blade brake and the electromagnetic clutch, 0,3 mm

The electrical system is protected by a fuse which cuts out the entire electrical system if blown. After finding and repairing the fault, replace the fuse with another of the same rating. Never replace the fuse with one of a different rating. The electrical system fuses are underneath the tank (fig. 19). If the problems persist after all the procedures described above have been carried out, contact the Grillo Dealer where you purchased the machine. Never attempt to make difficult repairs unless you have the necessary equipment and technical expertise.

Inside the steering column there is an electronic control unit (fig. 36) that controls all the electric functions of the machine (e.g. PTO, safety micro-switches).

Take care not to reverse the battery polarity.
Never operate the mower without the battery, since it is equipped with a charge regulator.
Take care not to cause short-circuits.

Adjust the zero turn device by tightening or loosening it (fig. 17). to adjust the forward and reverse travel speeds, use the screws (fig. 18).

After mowing, disengage the blades and drive back to base with the cutter deck in the highest position. To stop, move the forward lever to the STOP position (fig. 1B, no. 2), set the throttle lever at the minimum r.p.m., switch off the engine by turning the key on the STOP position (fig. 1, no.7) and lower the deck to the lowest position. Lock the park brake (fig. 23, no. 2).

Clean the outside of the mower after each use. Do not use a pressure washer. Use an air blower!

Store the brush cutter in a dry place, away from atmospheric agents, and preferably cover with a sheet. If the mower is not going to be used for a long period (over 1 month), disconnect the red battery cable (fig. 23) and follow the instructions given in the engine manual. Also lubricate all of the articulated joints. Regularly check that the battery voltage does not drop below 12 volts. If it does, recharge the battery. If the machine is to be out of use for more than 30 days, drain the fuel from the engine to prevent sticky deposits from forming in the fuel intake system or in vital parts of carburettor. To avoid this procedure, it  is possible to save fuel in storage up to 12 months by using an appropriate fuel stabilizer. Add such additive to the fuel in the tank or in the fuel container. Run the engine for a while to let the stabilizer get into the fuel system. Caution: if the engine is fed with petrol containing alcohol, drain the fuel tank and run the engine until there is no fuel left.

If the machine has to be transported on a truck or a trailer, fasten it to the vehicle using suitable ropes or strops.