Allett UltraChange Series Product manual

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UltraChange™Lawn Care Cartridge Range for
Stirling 43 and Stirling 51 Cylinder Lawnmowers
OPERATOR AND PARTS MANUAL
Original instructions: English version
Allett Limited, Regal House, Airfield Industrial Estate, Hixon, Stafford, ST18 0PF, United Kingdom
Tel: [phone] [e-mail] www.allett.co.uk
For Allett spare parts tel: [phone]

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READ THIS MANUAL BEFORE USING AN ALLETT STIRLING 43 OR 51 CYLINDER MOWER
YOUR SAFETY IS INVOLVED
IT IS ESSENTIAL THAT OPERATORS STUDY THIS DOCUMENT FOR THEIR OWN SAFETY

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AERATOR CARTRIDGE
LAWN BRUSH CARTRIDGE
DETHATCHER CARTRIDGE
VERTICUTTER CARTRIDGE
SCARIFIER CARTRIDGE

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1
1
1
2
1
A
B
C
D

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INTRODUCTION
Thank you for buying one of our UltraChange™ (UC) lawn care cartridges
This manual gives instructions on the correct assembly and safe use of the product when fitted to your mower.
For best results, the lawn care cartridges need precise control of the working depth. It is recommended that you
only use your cartridge in an Allett Stirling mower fitted with a HiteRite™ height of cut control. See A-1.
Using any of the cartridges covered in this manual in a dial adjustment model with 5 pre-set heights will invalidate
the mowers guarantee.
Please check our specification information on our website for further details- www.allett.co.uk
Please follow the appropriate instructions and diagrams.
DELIVERED ITEMS
Carefully remove the UC cartridge from its packaging and check for missing or damaged parts.
If parts are missing or damaged, please contact your dealer for assistance.
You may also contact your dealer for service and advice both within and outside the period of guarantee.

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SAFETY DECALS
Cartridge securing lever lock Height of cut / depth of cultivation
Beware of thrown or flying objects
Keep bystanders at a safe distance from machine
General hazard safety alert
Sharp blade(s). Beware of severing toes or fingers.
Sharp blade(s). Beware of severing toes or fingers.
Stay clear of rotating parts

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CHANGING A UC LAWN CARE CARTRIDGE
To remove a cartridge:
1. Remove the grass bag and battery
2. Pivot the two cartridge clamps (C1) upwards away from the machine
3. Press the release lever on the cartridge securing lever (B1), then pivot it towards the rear of the machine
until the latch pin locates in upper slot.
4. Pull the cartridge unit out using the handle (D1)
To insert a cartridge:
1. Make sure the cartridge clamps are pivoted upwards (C1) and cartridge securing lever (B1) is pivoted
towards the rear of the machine
2. Hold the cartridge unit by the handle and slide it into the mower. There are a pair of guides either side of
the chassis to help locate it correctly
3. Pivot the cartridge clamps (C1) downwards towards the machine
4. Press the release lever on the cartridge securing lever (B1) then pivot towards the front of the machine
until the latch pin locates in lower slot. This is tensioning the belt so needs to be done quite firmly
USING THE MOWER WITH A UC LAWN CARE CARTRIDGE
See “Setting the Height of Cut” in the mower instructions, then adjust the machine to achieve the required level of
aggressiveness and to suit the ground conditions.
Height settings range table:
Cartridge
Height of cut range
Recommended setting
SUREBLADE™ 6-BLADE
CYLINDER / REEL
5 mm to 50 mm
25 mm
SUREBLADE™ 10-BLADE
CYLINDER / REEL
4 mm to 20 mm
< 20 mm
UC SCARIFIER
0 mm to -10 mm
0 mm to -6 mm
UC VERTICUT
0 mm to -10 mm
0 mm
UC AERATOR
0 mm to -14 mm
-14 mm
UC LAWN BRUSH
0 mm to 10 mm
0 mm
UC DETHATCHER
0 mm to -14 mm
-6 mm to -8 mm

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When engaging drive to each lawn care cartridge, tilt the mower back slightly so the blades are just clear of the
ground. This will reduce wear on the belts and sprockets. When tilting the mower back stand in the operating
position at the rear of the machine and hold the handlebars with both hands. With the cartridge rotating, slowly
lower it into work.
Only use the lawn care cartridges in straight lines, turning whilst the blades are engaged may damage your lawn
and your mower.
It is recommended that the first pass is shallow - successive passes can be made deeper. If the mower struggles
for power or the engine stalls, reduce the working depth by raising the height of cut.
Follow the safety rules and operating information given in the mower instructions.
GENERAL ADVICE ON USING THE UC LAWN CARE CARTRIDGES
It is recommended to make successive passes at an angle of 15-20° to the previous one. Use the cartridges little
and often, rather than infrequent deep passes.
If passes are made at right angles the turf can be damaged as it opens and separates into cubes.
Debris should be removed from the lawn surface; the Lawn Brush cartridge is useful for collecting any debris that
has been missed.
During dry spells or drought stop using the lawn care cartridges to reduce turf stress.
For maximum effectiveness replace worn or rounded blades.
Aerator Cartridge
Slits soil to ease air and water movement. Has the added benefit of pruning the roots causing vigorous growth and
activity.
This cartridge is not powered. Set to full depth, a bag of lawn seed in the grass box will help penetration.
Lawn Brush Cartridge
This is the most gentle lawn treatment. It is ideal for clearing worm casts and collecting general surface debris.
The lawn brush is useful for covering renovating seed material or to work in top dressing. Top dressing is a
predominantly sand and silt/clay mix used for levelling lawns, improving drainage, and stimulating new grass
growth.
For general debris collection, set height to 12mm. To remove worm casts, a lower height may be necessary.
Dethatcher Cartridge
This is the most aggressive treatment and therefore uses the thickest tine.
Dethatching is an intense operation that lifts plant litter and helps remove the densest layers of thatch. This is a
destructive operation so it will remove a lot of material. After this treatment the lawn may need top dressing and
partial re-seeding. Autumn scarification is generally deeper involving more passes than Spring treatments.
In Spring, a single shallow pass is ideal to remove moss which has been killed with a proprietary moss killer. Also,
a shallow Spring pass is useful to prepare the turf for a light top dressing. Optimum conditions for using the
dethatcher are when the grass is short [15-20mm] and the soil is slightly damp, but not dry and hard.
Dethatching when the ground is waterlogged may damage the lawn and result in poor collection performance.

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Verticutter Cartridge
Verticutting can be thought of as “Vertical mowing” where thin and closely spaced tines remove lateral growth and
moss. This encourages grass to tiller and creates a denser, more regimented sward. The resulting lines left by the
action of the blades should grow out within two or three days in the growing season, if not raise the height of cut.
Regular (up to weekly) and shallow in-season verticutting will prevent excessive thatch build up.
Scarifier Cartridge
The Scarifier cartridge is Allett’s most popular cultivation cartridge and is designed to remove thatch, surface debris
and dead moss. This cartridge also helps lift lateral growth upright before mowing.
The scarifier has a custom design which helps to keep your lawn surface healthy and disease-free, by allowing air
and water to penetrate the soil surface. The machine is designed with rotating tines that pull out the dead grass
and moss to enable the passage of nutrients into the soil.
The rotating spring tines are relatively gentle on the lawn and this cartridge can be used most of the year without
fear of damage to keep on top of thatch levels as well as being useful to collect up leaves during the autumn. The
use of the spring tine allows for safe cultivation where tree roots may be close to the surface. This is the best
cartridge for beginners to turf cultivation as it is unlikely to cause damage if set too deeply but will give great results
if used regularly.
We suggest scarifying once a month during the mowing season to keep on top of thatch levels.
UC 10-BLADE CUTTING CYLINDER
UC 10-bladed cutting cylinder (reel) cartridges are also available where the precision finish of a golf or bowling
green is required. These are available in 43 & 51 cm widths. This allows mowing at shorter grass heights as low
as 4mm but requires regular mowing of 2 or more times per week.
SETTING CYLINDER / REEL BLADES ON CUT
The blades are correctly set when the cutting cylinder (reel) lightly brushes the bottom blade (bed knife) across the
full width as the cylinder (reel) is turned. The blades act like a pair of scissors. As a test, correctly adjusted blades
will cut a piece of good quality writing paper (80g/m2) across the width of the blade.
The cutting cylinder (reel) should only be adjusted if the grass is not cut cleanly and evenly.
To set blades correctly on cut:
1. Remove battery from machine.
2. Tilt the mower back and wedge securely.
3. Remove the grass bag.
4. Check the cleanness of cut with paper across the cutting width. Always wear gloves.
5. Turn the adjuster screws clockwise with a flat bladed screwdriver a little at a time and check the cleanness
of cut with a piece of paper as you go along. It may be necessary to only adjust one side to get a nice
scissor action.
Note: setting the blades with heavy contact can cause damage to your mower!
STORAGE
If the mower is to be left standing for long periods, adjust the height of cut so that the tines are clear of the ground.
Before storage remove all the debris from the mower and cartridge with a brush and apply a light coating of oil.
A storage stand is available to store up to 3 cartridges, please contact your local dealer for information.

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LAWN CARE CALENDAR
Aerator
Lawn Brush
Dethatcher
Verticutter
Scarifier
January
Remove leaves
February
Aerate to improve
surface drainage
and Oxygen uptake
Break up and
disperse worm casts
Remove thatch
layer before
increasing plant
density with new
lawn seed
March
Aerate to improve
surface drainage
and Oxygen uptake
Remove leaves and
worm casts, lightly
cover newly planted
seeds
Remove thatch
layer before
increasing plant
density with new
lawn seed
April
Aerate to improve
surface drainage
and Oxygen uptake
Remove lateral
growth and
encourage grass to
tiller
Scarify once a
month to remove
thatch, debris and
moss
May
Aerate to improve
surface drainage
and Oxygen uptake
Remove leaves and
worm casts, lightly
cover newly planted
seeds
Remove lateral
growth and
encourage grass to
tiller
Scarify once a
month to remove
thatch, debris and
moss
June
Aerate regularly
except in dry
conditions
Add top dressing to
low spots and brush
in to create a
uniform surface
Compliment normal
horizontal cylinder
mowing with vertical
verticutting
Scarify once a
month to remove
thatch, debris and
moss
July
Aerate regularly
except in dry
conditions
Compliment normal
horizontal cylinder
mowing with vertical
verticutting
Scarify once a
month to remove
thatch, debris and
moss
August
Aerate regularly
except in dry
conditions
Top dress as
needed and brush
in to create a
uniform surface
Regular verticutting
will help reduce the
thatch layer
Scarify once a
month to remove
thatch, debris and
moss
September
Aerate regularly
except in dry
conditions
Remove thatch
layer before
increasing plant
density with new
lawn seed
Regular verticutting
will help reduce the
thatch layer
Scarify once a
month to remove
thatch, debris and
moss
October
If not too wet aerate
regularly to help
water percolate
Remove leaves and
worm casts
Remove thatch
layer before
increasing plant
density with new
lawn seed
Compliment normal
horizontal cylinder
mowing with vertical
verticutting
Scarify once a
month to remove
thatch, debris and
moss
November
If not too wet aerate
regularly to help
water percolate
Remove leaves and
worm casts
Scarify once a
month to remove
thatch, debris and
moss
December

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4
NOTE: CARTRIDGE PULLEY CONTAINS A LEFT-HANDED THREAD
UC CUTTING CYLINDER / REEL –WEARING PARTS DIAGRAM
ITEM NO.
43 CYL PART NUMBER
51 CYL PART NUMBER
DESCRIPTION
QTY
1
F016A58820
F016A58821
CYLINDER / REEL
1
2
F016J11745
F016J11750
BOTTOM BLADE / BED KNIFE ASSEMBLY
1
3
F016A58741
F016A58741
BALL BEARING
2
4
F016J13223
F016J13223
CARTRIDGE PULLEY
1
1
2
3

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1
2
3
4
UC ACCESSORY CARTRIDGE PARTS DIAGRAM –WEARING PARTS
ITEM NO.
PART NUMBER
DESCRIPTION
QTY PER 43 UC CART
QTY PER 51 UC CART
1
F016J10246
AERATOR BLADE
7
8
2
F016J10245
DETHATCHER BLADE
7
8
3
F016J10243
VERTICUTTER BLADE
13
15
4
F016T47920
SPRING TINE
44
52

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EU Declaration of Conformity
UltraChangeTM Lawn care cartridge range
This Declaration is issued under the sole responsibility of the manufacturer
We: Allett Ltd
Of: Regal House, Airfield Industrial Estate, Hixon, Staffordshire, ST18 0PF, UK
Declare that the below interchangeable cartridges:
Model name
Machine type
Cutting
width
Serial No.
Stirling 43 Aerator Cartridge
UC43A/1
43cm
00001-99999
Stirling 43 Dethatcher cartridge
UC43D/1
43cm
00001-99999
Stirling 43 Lawn Brush cartridge
UC43LB/1
43cm
00001-99999
Stirling 43 Scarifier cartridge
UC43SC/1
43cm
00001-99999
Stirling 43 Verticutter cartridge
UC43V/1
43cm
00001-99999
Stirling 43 10-blade mowing cartridge
UCC4310/1
43cm
00001-99999
Stirling 51 Aerator Cartridge
UC51A/1
51cm
00001-99999
Stirling 51 Dethatcher cartridge
UC51D/1
51cm
00001-99999
Stirling 51 Lawn Brush cartridge
UC51LB/1
51cm
00001-99999
Stirling 51 Scarifier cartridge
UC51SC/1
51cm
00001-99999
Stirling 51 Verticutter cartridge
UC51V/1
51cm
00001-99999
Stirling 51 10-blade mowing cartridge
UCC5110/1
51cm
00001-99999
Conform to the essential requirements of the following Directives and their amendments:
2006/42/EC and have been designed and manufactured to the following standards and their annexes: BS EN
60335-2-77:2010, BS EN ISO 5395-1:2013+A2:2018 and BS EN ISO 5395-2:2013+A2:2017
Technical file compiler: Allett Ltd, Regal House, ST18 0PF
I hereby declare that the equipment named above has been tested and found to comply with the relevant sections
of the above referenced specifications. The unit complies with all essential requirements of the Directives.
Place: Stafford, 28/01/2022
Signature:
Austin Jarrett
Position: Managing Director

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Allett Domestic Warranty Terms & Conditions
Allett Ltd guarantees this product against manufacturing defects. We will repair (or replace at our option) if a
manufacturing defect occurs within the guarantee period as long as it has not been subjected to rental/hire use.
The guarantee period for domestic use is: 1-year parts and labour
For commercial or non-domestic use, the guarantee period is 60 days.
For the purpose of this guarantee:
Non-domestic use means all other uses including, commercial, income producing, but excluding rental/hire use.
To obtain a repair under this guarantee:
You must contact the place of purchase and report the problem to them. You need to have your proof of purchase
and guarantee. If the dealer cannot assist in finding a solution to the problem reported, please contact Allett to
report any unresolved issues.
This guarantee does not apply if:
1. The product has been resold by original purchaser (this does not apply in the Republic of Ireland), or has
been used under hire.
2. The product has been modified to change the manufacturers specifications, or if non genuine replacement
parts have been fitted.
3. If any previous repair was undertaken by anyone other than an Approved Service Agent.
4. The fault is due to maladjustment, abuse, neglect or accidental damage.
5. The fault is due to lack of lubrication or maintenance.
6. Damage to any part, particularly the drive or cutting mechanism has been caused by allowing the product
to strike solid objects.
7. The product develops a fault due to abnormal use.
8. Failure is due to normal wear. The following parts are considered as wearing parts: (their life is dependent
on regular servicing, and they are not therefore, normally covered by the guarantee. Examples of wearing
parts are as follows cutting cylinder & bottom blade, cylinder, roller, drive belts & cables, bearings, chains
& sprockets, plastic drive gears, pulleys, any friction related parts, and other parts what have contact with
the ground Any of the above parts replaced without prior authorisation will be rejected in the first
instance.)
Serviceable parts life is dependent on regular servicing, and they are not therefore normally considered by the
guarantee. The cost of routine maintenance of the product is not covered by the guarantee unless an Allett Service
Contract is undertaken
It is in your best interest to follow the operating instructions for your lawnmower as a properly cared for product
should give many years of excellent service cutting grass.
Always insist on genuine Allett spares or parts. Any non-genuine parts fitted within the Warranty period will result
in your manufacturing Warranty becoming null and void. Any damage caused to the product through the fitting of
parts not made or approved by Allett is not covered by the guarantee.
Any defective part replaced on Allett machines shall not exceed the remainder of the existing warranty period on
any Allett product. Unless agreed in writing by Allett After Sales Manager or Allett Sales Manager.
Travelling costs must have prior authorisation from Allett After Sales Manager/Allett Sales Manager for any claims
to be processed. Claims submitted without written prior authorisation will be rejected in first instance. Any mileage
claims will be credited @0.50 pence per mile. With no exceptions
Your statutory rights are not affected by this guarantee.
When the time comes to dispose of this product, please consider the environment and take it to a recognised
recycling facility.