Thank you for buying a lawn mower from the Seco Group a.s. Seco is recognized in markets throughout
Europe and around the world as a manufacturer of high-quality lawn care machines and accessories.
This manual contains instructions for safe setup, operation and maintenance of your mower.
Read this manual carefully . Comply with all instructions contained in this manual. They guide
you not only in operating your machine, but also help you to ensure its optimal use and long
life. Do not use the machine unless you are thoroughly familiar with all instructions,
restrictions and recommendations provided in this manual.
Store this manual for later use. The manual must be seen as a part of the mower and must
accompany it if the machine is sold.
If you have any questions, or if anything is unclear, feel free to contac t one of our more than 100
authorized, well-equipped ser vice centr es throughout Europ e. They give you access to fac tory-trained
and tested service professionals.
Symbols used in this manual
SYMBOLMEANING
These symbols mean “CAUTION” and “WARNING” and point to factors that could damage
the machine and/or severely injure the user.
This symbol indicates an important instruction, characteristic, practice or issue that must
be followed or kept in mind when setting up, using and maintaining the machine.
This symbol indicates useful information related to the machine or accessories.
This symbol refers to the illustration in the front portion of the manual. It is always
accompanied by the illustration number.
This symbol refers to another chapter of this or another manual. It is usually accompanied
by the number of the chapter to which it refers.
Links to guidelines
Left and right sidesBack and front ends
L = left side, R = right sideB = back end, F = front end
18
1. TECHNICAL INFORMATION
1.1 Use
The AJ92 CHALLENGE machine is a two-axle self-propelled riding mower designed for mowing even,
maintained grass areas with a maximum vegetation height of 10 cm, e.g. in parks, gardens
and sports fields, possibly on minor slopes, on which there are no foreign objects (fallen branches,
rocks, solid items, etc.). The incline of the slope must not exceed 10° (17%).
Any use of this self-propelled mower that is not mentioned in this manual or that
extends beyond the range of use mentioned is considered use that violates the
purpose. The user bears exclusive resp onsibility for all such us e, and the manufacturer is
not responsible for damages arising therefrom. The user is also responsible for adhering
to the conditions presc ribed by the manufacturer fo r operation, maintenance and repair of
this machine, which must be used, maintained and repaired only by persons who are
familiar with it and who have been instructed in safety.
Only manufacturer-approved accessories can be attached to the machine. Using
non-approved accessories will immediately void the warranty.
1.2 MAIN PARTS OF THE MOWER
The AJ92 riding mower consists of the following basic sections:
(1) Frame and bumper
1.2
The frame and bumper support most of the machine’s main parts.
(2) Front axle and wheels, including steering mechanism
The front axle allows the wheels to be steered. Steering is done with a steering wheel.
(3) Mowing mechanism
The mowing deck mows and collect s the gras s. It is located under the mac hine. It consists
of a cover, main plate and two mowing blades.
(4) Grass removal tube
It connects the mowing deck with the gr ass catc her. Through here the grass passe s to the
grass catcher.
(5) Transmission and rear-wheel drive
The transmission box and hydrostatic transmission are for shifting gears when driving.
(6) Bypass
The bypass lever is for engaging and disengaging power from the tr ansmission to the re ar
wheels. It is located near the lef t rear wheel and, depending on the machine’s design, is
either in front of or behind the wheel.
(7) Grass catcher
The grass catc her, located at the bac k of the machine, and consist s of a steel tube f rame,
a fabric bag and a dumping lever.
(8) Driver’s area
The comfortable seat allows easy access to all of the machine’s controls.
(9) Bonnet, engine, wiring and battery
The bonnet is a combination of plastic and metal covers that appropriately cover the machine’s
electr ical and mec hanical par ts. L ocated unde r the hood is a 4-str oke petrol engine that is
secured to the frame. The battery is located in the storage space under the steering wheel.
19
1.3 MANUFACTURING PLATE AND OTHER LABELS USED ON THE MACHINE
1.3.1 MANUFACTURING PLATE
Each self-propelled mower is marked with the manuf ac t ur er’s label, located below the seat . You can
access it by lifting the seat.
1. Mower model
2. Engine model
3. Model year
4. Weight
5. Name and address of manufacturer
1.3.1
1.3.2 OTHER LABELS AND THEIR MEANING
The following labels and stickers are fastened to your machine:
6. EC product conformity regulations
7. Product conformity symbol
8. Manufacturer’s logo
9. Guaranteed noise level according to regulation 2000/14/EC
The vendor will write the serial number of your machine on the back cover of this manual.
Labels on the left and right side of the mowing deck:
Keep feet
clear
Guaranteed
noise level
1.3.2a
Danger
Rotating
tools
Labels on the canopy below the seat:
Do not
1.3.2b
Danger
Beware
of flying
objects!
Do not drive
across a
slope.
touch during
operation.
Read the
manual
Keep
unauthorized
persons at a
safe distance.
Repair
according to
manual.
Do not mow
near other
people.
Do not
let the
machine run
unattended.
No riders
Maximum
working
slope
It is strictly prohibited to remove or damage labels or symbols attached to the mower.
If a label is damaged or illegible, contact your dealer or the manufacturer for a replacement.
Labels on the left and right side of the machine’s frame under the hood:
1.3.2c
Careful
Hot surface!
Danger of
burns
20
Labels near the undercarriage pedal:
RReverse
NNeutral
FForward
1.3.2d
Fast
Slow
Label at the brake pedal:
Brake
1.3.2e
1.4 TECHNICAL PARAMETERS
BASIC SPECIFICATIONSUNIT
Dimensions
(length x width x
height)
MOWER MODEL
AJ92 CHALLENGE
[mm]950 x 1120 x 2480
Weight[kg]255
Speed forward /
reverse
[km/h]9 / 7
Cutting height[mm]30 - 90
Cutting stroke[mm]92
Grass catcher volume[l]300
Full grass collector
indicator
---Buzzer
21
BASIC SPECIFICATIONSUNIT
MOWER MODEL
AJ92 CHALLENGE
Wheel
dimensions
Rear18 x 8,5-8
["]
Fuel tank capacity[l]7
Battery type---12V 24 Ah
Front
Guaranteed acoustic
output level L
WA
[dB]< 100*
Declared noise
emission level at the
operator L
per EN
pAd
[dB]< 90*
ISO 11201
* - For exact values, see the charts on the next page.
CHALLENGE brand AJ92 s elf-prope lled mowers are manufac tured accor ding to applicable European
safety norms. The manufacturer confirms this in the Declaratio n of Complianc e include d at the end
of this manual (10).
If this machine is used properly and according to the manual, it is very safe.
If the user does not adhere to work safety and does not heed the warnings in this
manual, this self-pro pelled lawn mower can sever a hand or a foot, or even hurl
objects, le ading t o se riou s pe r son al injury or de ath, d amage or de s truc t ion of t he
machine, or of some of its parts or accessories.
2.1 SAFETY INSTRUCTIONS
The user bears primary responsibility for his or her own safety and that of other people during operation
of the mower. The machine’s manufactur er bears no r esponsibilit y for pers onal injury, damage to the
machine or ecological damage c aused by use and ope ration not in keeping with all safety ins truc tions
given in this manual.
2.1.1 General safety instructions
! This machine may be operated only by persons 18 years or older who are familiar with this user
manual. The machine must never be operated by unauthorised persons, who hav e not read the user’s
manual and who are not able to correctly and safely control the machine.
! The use r of the machine is responsible f or the safet y of persons pr esent in the machine’s operating
area.
! It is prohibited to perform any technical modifications without prior written consent of the manufacturer .
Unauthorized modifications may lead to hazardous working conditions and void the warranty.
! Adhere to all fire safety regulations (
2.4).
! Do not remove the safet y sticker s and labels from t he machine. Check that they are in their pr oper
locations.
! Do not go near or underneath the machine if it has been raised and is not sufficiently secured against
falling or overturning.
! Subjecting components of the grass catcher to stress can damage them, reduce their function or cause
objects to fall out of the c atc her. Therefore, chec k them r egular ly acc or ding to the re c ommendations
in this manual.
! Always switch off the mowing mechanism and the engine and remove the key from the ignition when:
cleaning the machine
unclogging the mowing mechanism
checking the machine for damage or repairing it after driving over a foreign object
checking for the cause of excessive vibration
repairing the engine or other movable parts (also disconnect the ignition cable)
2.1.2 Before using the machine
! Do not use the machine if it is damaged or missing safety equipment. All protective covers and safety
elements must be in place at all times. Do not remove or disable any safety devices.
! Regularly check that protection devices and safety elements work properly.
! Do not use the machine when under the influence of alcohol, medication or narcotics.
! Do not work with the mac hine if you suff er dizziness or f ainting, or if you are otherwise weakened or
unable to concentrate.
! Before op erating the machine, thoroughly familiarize yourself with all the contr ols and master their
operation so that, if necessary, you can immediately stop the machine or shut off its engine.
! Do not change the settings of the engine regulator or engine speed limiter.
23
! Befo re working with the machine, clear the mowing sur face of all stones, wood, wires, bones, fallen
branches and other foreign objects that the machine may throw during operation.
! Repair all defects bef or e f urther use. Befor e s tarting work, thoroughly inspe ct the V-belt tension, the
sharpness of the mowing blades and the cleanliness of the mowing mechanism cover.
! Before using the machine, visually check that the machine parts are not damaged or missing or visibly
loosened.
! Prior to using the machine check that the brakes work and if necessary have them adjusted or repaired.
2.1.3 While using the machine
! The machine must not be used for work on slopes that have an incline greater than 10° (17%).
! Transporting other people, animals or objects on the machine is prohibited. Objects may be transported
only on a trailer approved by the machine’s manufacturer.
! Even when leaving the machine for a short time, always remove the ignition key.
! If you are driving the machine out side the mowing area, always shut off the mowing mechanism and
raise it to transport position.
! Never mow near dumps, holes or river banks. If a wheel gets too close to th e e dge of a hole or ditc h,
the mower may suddenly overturn.
! While working, keep clear of molehills, concrete supports, tree stumps and the curb stones of gardens
and street s. These may come into co ntact with the blade s and damage the mowing mechanism and
the machine itself.
! If you run into a solid objec t, stop t he mac hine, shut of f the mowing mechanism and the engine, and
check the whole machine, especially the steering mechanism. If necessary, repair any damage before
restarting the machine.
! Where possible, avoid working with the machine on wet grass. Reduced traction may cause skidding.
! Avoid obstacles (e.g., sudden changes in slope, ditches, etc.) that could overturn the machine.
! Do not try to maintain the machine’s stability by stepping on the ground.
! Use the machine only in daylight or under sufficient artificial light.
! Do not drive the machine on public thoroughfares.
! Whe n operating the mac hine, do not wear loose clothing or shor t trous er s; wear strong, closed work
shoes. Never operate the machine barefoot or in sandals.
! Do not leave the engine running in enclosed spaces. Exhaust gases contain poisonous substances that
have no odour but are nonetheless fatal.
! Do not place your hands or feet under the mowing mechanism cover . Never bring any part of your body
near the machine’s rotating or moving parts.
! Do not start the engine without the exhaust pipe.
! The noise that occurs during mowing does not ordinarily exceed the highest acoustic pressure
and volume values shown in this manual (
1.4). However, under some conditions, due to terrain
characteristics, the noise level may briefly exceed specified levels.
! The manufacturer recommends wearing ear protectors while operating the machine. Stress placed on
the auditory organ s by high volume levels or the long-term ef f e cts of noise can per manently damage
hearing.
! Always give your full attention to driving and the other ac tivities involved in using the machine. The
most common ways to lose control over the machine are:
Loss of traction.
Driving too fast; not adapting speed to the surface conditions and characteristics.
Abrupt braking that can lock the wheels.
Using the mower for purposes other than those intended.
2.1.4 After working with the machine
! Always keep the machine and its accessories clean and in good working order.
24
! The rot ating blades are sharp and may cause injur y. When handling the blades, wrap them or wear
protective gloves.
! Regularly check the nuts and bolts that hold the blades, and mak e sure they are tightened to the right
level of torque (
! Pay special attention to the self-locking nuts. Af ter a nut has been removed twice, its self-locking
ability is reduced, and it must be replaced with a new one.
! Regularly check the c o mp onents and, when necessary, replace them ac c o r ding to th e manuf acturer’s
recommendation.
6.3.6).
2.2 SAFETY INSTRUCTIONS FOR WORKING ON SLOPES
Slopes are a main cause of accidents, loss of control and overturning. These can lead to severe injury or
death. Always use extra caution when mowing on slopes. If you are not sure or are unable to mow on a
slope, don’t do it.
! The self-propelled mower can be used on slopes of no more than 10° (17%), when using the 4x4 drive
at a maximum slope of 1 5 ° ( 2 7 %) and only ver tically, i.e., upward or downward. More information
5.5.4.
! Extra caution is necessary when turning. Do not turn around on a slope unless absolutely necessary.
! Beware of holes, roots or uneven ter rain. Uneven terrain may cause your machine to overturn. Tall
grass may conceal dangerous ob stacles. Therefor e, remove all obstacle s from the mowing surface
ahead of time.
! Select a speed that will not require you to stop on a slope.
! Be very careful when attaching the grass catcher or other attachments. They may reduce the machine’s
stability.
! Always move slowly and smoothly on a slope. Do not change speed or direction suddenly.
! Avoid starting or stopping on a slope. If the wheels lose tr action, turn off power to the blades and
slowly drive down the slope.
! Ac c eler ate ver y sl owly and caref ully on slope s, to prevent the machine from lurc hing. Befor e a slop e,
always reduce the engine speed. Especially when driving downward, reduce the speed to the minimum
for using the transmission’s braking effect.
2.3 CHILD SAFETY
If the operator is not alert to the presence of children, a tragic accident may occur. The mower’s
movement attracts their attention. Never assume that children will stay where you saw them last.
! Never leave children unsupervised in mowing areas.
! Never allow children to operate this machine!
! Be alert and ready to stop your machine in case of an emergency.
! Before and and while backing up, look to the rear and at the ground.
! Never transport children on the mower. They can fall and be severely injured or dangerously interfere
with your operation of the mower. Never allow children to operate the machine.
! Take extra care in areas of limited visibility (near trees, bushes, walls, etc.).
2.4 FIRE SAFETY
While using the mower, you must observe all work and fire safety rules relevant to this type of machine.
! Regularly r emove flammable mater ials (dry grass, leaves, etc.) from the ar ea of the engine exhaus t,
battery and anywhere where they might come into contact with petrol or oil, ignite and set the machine
on fire.
! Allow the mower’s engine to cool before storing it in an enclosed space.
! Use extra c aution when working with petrol, oil and other flammable substanc es. These are highly
flammable substances, and their fumes are explosive. Do not smoke while working. Never unscrew the
fuel cap, and never add fuel when the engine is running or is warm, or if the machine is in an enclosed
space.
25
! Check the fuel flow before use; do not fill the tank up to the neck. Engine heat, sun and the expandability
of fuel may lead to overflow and r esult in fire. Use only approved container s for storing flammable
substances. Never stor e th e machine or f uel c ont ainer near any heat sour c e. Use e x tr a c aution when
handling the batter y. Batter y gases ar e highly explosive. Do not smoke or use an open flame when
handling the battery, as this may cause serious injury.
26
3. PREPARING FOR OPERATION
3.1 UNPACKING AND CONTENT INSPECTION
The self-propelled mower is delivered in a fabric cover (1). Some parts of the machine have been
dismantled for transp ort at the factor y, and they must be installe d before operation. The machine is
unpacked and prepared for operation by the dealer as part of pre-sale service.
- Af ter delivery, immediately check to see if the packaged mac hine is damaged. If there is
damage, notify the carrier. If a claim is not made on time, it cannot be honoured.
- Check to see that the machine is the model you ordered. If it is the wrong model machine,
do not unpack it, and immediately alert the supplier.
After r emoving the cover, carefully re move the machine from the pallet. This requires preparation of
ramps (2) to avoid damage to par ts of the machine. Make sure that there is no shipping damage. Also
unpack all dismantled parts and inspect them.
1. Fabric cover
2. Ramps
3. Grass catcher
3.1
The basic package includes:
Mower
Steering wheel (6)
Seat (5)
The grass catcher (3) (is partially disassembled in the cardboard box, with a hitch and joining material.
Documentation (4) (packing list, user manual for mower, engine manual, battery manual and service
book)
4. Documentation
5. Seat
6. Steering wheel
Ramps (2) are not included with the machine.
3.2 DISPOSAL OF PACKAGING
After unpack ing the accessories, make sure you properly dispos e of and recycle
the packaging material.Comply with applicable waste disposal laws in the user’s
country.
Disposal can be entrusted to a specialized company.
3.3 ASSEMBLING PACKED UNITS
Because it is technic al work, your dealer will prepar e the mower for ope ration (according to
the following instructions).
Before starting installation, remove all protective materials, place the mower on a flat surface,
and align the front wheels in forward position.
27
3.3.1 STEERING WHEEL, SEAT AND BATTERY
a) Fasten the seat:
Place the seat in its place on the machine and secure it using four bolts, pre-mounted
in the seat. Before tightening the bolts, set the desired position of the seat to match
your body size.
b) Connect the cable to the safety switch:
Connect the electrical cable to the switch connector at the bottom of the seat.
c) Install the steering wheel:
Place the wheel on the column (1) and turn it so that the holes in the steering wheel
and column meet.
Insert the included peg into the hole (2) and pound it with a hammer.
d) Connect the battery:
Bolts and rubber bat ter y caps are lo cated in the bag with the documentation and
other joining material.
Turn the lever of the storage space c over located under the ste ering wheel to open
the cover and take it out.
Loosen the bolts on the battery’s pole terminals.
Attach the red cable to the battery’s positive (+) pole and secure it with the bolt.
Attach the brown cable to the battery’s negative (–) pole and secure it with the bolt.
Place the rubber caps on to both leads.
Put the storage space cover back and secure with the lever.
3.3.1a
3.3.1b
3.3.1c
3.3.1d
- Connecting the cables backwards can damage the machine.
- When disconnecting the battery, always disconnect the negative (–) terminal first.
- When installing, using and maintaining the battery , follow the instructions described in the
battery manual. At the same time, observe all of the manual’s safety instructions.
3.3.2 GRASS CATCHER
The grass catc her is de livered in a se parate b ox. Some of its parts have been dismantled for transp ort
and must be assembled first. Later chapters give a rough outline on assembling it. The complete process
is shown on the DVD that is included or can be sent upon request.
TOOLS NEEDED
Prepare the following tools for assembling the catcher:
A knife for removing packing
material
UNPACKING
A set of hexagonal socket
wrenches and hex wrenches
Phillips screwdrivers or an
electrical hand screwdriver
Remove the packing material. First take out the lid, frame and sack and then the wr apped individual
parts. Unpack these parts and clearly organize them in an appropriate place.
Screw the grass catcher hinges (9) and hinges (10) on to the rear plate.
- On some machines, the hinges (9) are already pre-mounted on the rear plate.
- Hinge (10) is attached only if a trailer is used.
Insert M5x16 bolts into the top holes in the front frame at tachment brackets at t he top,
and secure in place with a washer and nut and tighten lightly. Pull tight the pre-mounted
bottom bolt s. On to the right side of the fr ont frame tube, into the lower hole, using two
bolts screw on the grass catcher hitch switch.
3.3.2b
3.3.2c
3.3.2d
Screw on the side st r ut s of the gr as s c atc her. The struts ar e attached to the inner side of
the grass catcher using M5x16 bolts and nuts.
Screw the bot tom tube to the f rame. For easier as sembly, we recommend that the grass
catcher is turne d upside down. Attach it to the side braces and to t he front frame tube
using M5x3 bolts and nuts.
Slide the grass catcher s ack on to the frame. Pull the rubber sides of th e sack over the
tubes.
29
3.3.2e
3.3.2f
3.3.2g
Screw on the lower brace from the bottom side of the grass catcher.
Into the openings in the lid insert the handle and slide washer s on to its threade d ends.
Insert the piec e assembled in this way through the openings in the top bracket on the
frame and secure the handle using nuts. Do not tighten them yet!
Bolt the lid to the frame and tighten the bolts.
Insert the emptying lever into the holes in the brace inside the catcher.
Into the lower end of the lever inside, insert a bolt and push its thr eade d portion through
the hole. Secure it from above with a nut and tighten it.
Firmly tighten the nuts sec uring the handle and tighten the nut s se cur ing the top brac ket
of the frame. This completes the installation of the grass catcher.
BALANCING AFTER INSTALLATION
Take hold of the grass catcher and hang it on the hangers on the rear plate of the machine.
Check for the co rr e c t alignment of the gra ss c atc her with the mudguar d us ing the arr ows
pressed in the grass catcher lid and the machine cover. Correct any imbalance by loosening
the bolts in the front tube and/ or the bolts in the side braces, ev ening it up and retightening
the bolts.
3.3.2h
3.3.2i
3.3.2j
3.3.2k
3.3.2l
3.3.2m
On a properly adjusted grass c atcher the spac e bet ween the r ear plate of the machine and
the front frame tube (8) (
If it is not possible to align using the above described me tho d, perform the adjustment by sliding the
3.3.2b) is no greater than 5 mm.
grass catcher hitch on the rear plate or the bolts and brackets on the top side of the hitch.
3.4 INSPECTING BEFORE STARTUP
3.4.1 CHECKING THE ENGINE OIL
Before checking the oil, the tractor must be in a horizontal position. The oil cap can be accessed by lifting
the seat. Unscrew the dipstick, wipe it clean, reinsert it and screw it back in. Then unscrew it again and
read the oil level.
Oil level on dipstick:
(1) - (ADD) oil is low
(2) - (FULL) oil is full
The oil level must be between the t wo marks on the dipstic k. If it is not, add motor oil until it reaches
the “FULL” mark. The oil type is designated in a separate manual from the engine manufacturer.
The oil must be checked before every ride.
3.4.2 BATTERY INSPECTION
Check the battery according to the manual provided by its manufacturer.
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