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Allett C20 Operator's & Parts Manual

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C20" & C24"
OPERATOR & PARTS MANUAL
(AM81592 Issue I Jan 2019)
English version
Allett Limited
Regal House, Airfield Industrial Estate, Hixon, Stafford, ST18 0PF, United Kingdom
Tel: +44 (0) 1889 271503
Fax: +44 (0) 1889 271321
For Allett spare parts
Tel: +44 (0) 1889 272092 or 272093
Fax: +44 (0) 1889 272084
sales@allett.co.uk
www.allett.co.uk
42

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  • Page 1 C20” & C24” OPERATOR & PARTS MANUAL (AM81592 Issue I Jan 2019) English version Allett Limited Regal House, Airfield Industrial Estate, Hixon, Stafford, ST18 0PF, United Kingdom Tel: +44 (0) 1889 271503 Fax: +44 (0) 1889 271321 For Allett spare parts...
  • Page 2 READ THIS MANUAL BEFORE USING AN ALLETT C20 OR C24 CYLINDER MOWER. YOUR SAFETY IS INVOLVED IT IS ESSENTIAL THAT OPERATORS STUDY THIS DOCUMENT FOR THEIR OWN SAFETY.

  • Page 3: Table Of Contents

    Contents 1.0 Introduction 1.1 Model type and serial number 2.0 Pictograms and Decals 3.0 Safety notes 4.0 Assembly 5.0 Operating controls 6.0 Using your mower 6.1 Starting 6.2 Stopping 6.3 Adjusting the bottom blade - setting “on cut” 6.4 Height of cut adjustment 6.5 Groomer height adjustment 6.6 Click height adjusters 6.7 Engaging drive to the cylinder/cartridge...

  • Page 4: Introduction

    Power is transferred to the cartridge by a toothed coupling and belt drive. The C20 & C24 mower is designed for the management of high quality turf. Use in any way other than that stated is considered contrary to the intended use. Compliance and strict adherence to the conditions of operation, service and repair as specified in this manual also constitute essential elements of the intended use.

  • Page 5: Pictograms And Decals

    2.0 Pictograms and Decals Refer to manual before carrying out maintenance, Engine On/Off switch, Read manual before starting Guaranteed Sound power level emitted by the mower Bottom blade to cylinder adjustment Flying debris, keep bystanders away. Warning, sharp blades, blades continue to rotate after the mower is switched off Cut height, Turning anticlockwise increases cut height (+), turning clockwise decreases cut height (-).
  • Page 6 Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people or their property. Whilst mowing, always wear substantial footwear and long trousers. Do not operate the equipment when barefoot or wearing open sandals. Wear appropriate protective clothing and equipment when you are operating the lawnmower, such as safety glasses, long trousers, substantial footwear and ear protection.

  • Page 7: Assembly

    - Whenever you leave the machine - Before refuelling - Before checking blockages Reduce the throttle setting during engine shut-down and turn the fuel off at the conclusion of mowing. Keep all nuts, bolts and screws tight to be sure that the lawnmower is in safe working condition. Never store the lawnmower with petrol in the tank inside a building where fumes may reach an open flame or spark.

  • Page 8: Operating Controls

    5.0 Operating controls...
  • Page 9 1) Handle bar ON/OFF switch 14) Choke lever 2) Throttle 15) Oil dipstick 3) Cutting cylinder engagement 16) Spark plug 4) Land roll engagement 17) Air filter 5) Park brake 18) Fuel tank 6) Top handle bar 19) Bottom blade adjuster 7) Cable adjuster 20) Cartridge drive coupling 8) Bottom handle bar...

  • Page 10: Using Your Mower

    6.0 Using your mower 6.1 Starting 1) Move the fuel valve lever to the ON position 2) For a cold  start move the choke lever to the CLOSED position |\| To restart a warm  engine leave the choke lever in the OPEN position 3) Set the throttle to 1/3 position 1/3 position...

  • Page 11: Stopping

    6) Pull the starter grip lightly grip until you feel resistance, then pull briskly. Return the starter grip gently 7) If the choke lever was moved to the CLOSED position |\| to start the engine, gradually move it to the OPEN position |||as the engine warms up 6.2 Stopping 1) Move the throttle lever to MIN position...
  • Page 12 Bottom blade adjustment decal Do not over tighten the bottom blade – the cylinder should be able to spin freely If you are still unable to cleanly cut paper, inspect the bottom blade and cylinder. If they appear, rounded, damaged or excessively worn they may need to be reground or replaced. New bottom blades should always be reground attached to the bottom blade carrier.

  • Page 13: Height Of Cut Adjustment

    6.4 Height of cut adjustment The height of cut is set by altering the position of the front roller. WARNING - blades are sharp, always wear gloves WARNING – Stop the engine and remove the spark plug cap For a cutting cylinder cartridge: 1) Set “on cut”...

  • Page 14: Groomer Height Adjustment

    6.5 Groomer height adjustment The groomer work adjustment knob can be used to raise the groomer out of work if it is not needed Groomer Groomer work adjuster knob adjustment knob Groomer “Out of work” position assembly “Work” position For a cutting cylinder cartridge with optional groomer, set the groomer depth as follows: 1) Adjust and lock the screw on the height setting bar to your desired grooming height (Y), this is normally 2-3mm less than the height of cut.

  • Page 15: Engaging Drive To The Cylinder/Cartridge

    6.7 Engaging drive to the cylinder/cartridge 1) Gradually squeeze the cylinder/cartridge bail bar towards the top handle – see section 5.0 2) Release the bail bar to stop the cylinder/cartridge 6.8 Engaging drive to the land roll 1) Gradually squeeze the drive bail bar towards the top handle – see section 5.0 2) Release the bail bar to stop forward movement 6.9 Park brake To engage the park brake:...

  • Page 16: Maintenance

    If the mower should happen to fail despite the care taken in manufacture and testing, repairs should be carried out by an authorised Allett dealer. 7.1 Adjusting land drive and cylinder cables If the mower or cylinder doesn’t drive adequately it may be necessary to adjust the drive cable as follows:...

  • Page 17: General Engine Maintenance

    1) With the mower standing on level ground, unscrew and remove the engine oil filler dipstick (15) 2) Wipe the oil filler dipstick clean: insert the oil dipstick, then remove it again. Do not screw it in. 3) Check the oil level 4) Add a good quality SAE 10W-30 oil in small quantities at a time, allowing it to settle.

  • Page 18: Grease Points

    7.6 Bottom blade grinding angles For cylinder cutting cartridges only. The cutting performance of the C20 and C24 is highly dependent on the condition of both the cylinder and bottom blade. Poorly maintained parts will lead to a poor quality of cut.

  • Page 19: Maintenance Schedule

    7.8 Maintenance schedule Activity Task Daily Weekly Monthly Yearly Check ● Engine oil level ● Fuel level ● Air cleaner condition ● Guards in place ● Cutting cylinder/cartridge ● Fasteners ● Chain and belt tension ● Spark plug Clean ● Debris/grass from mower ●...

  • Page 20: Floating Handle Bars

    8.2 Floating handle bars The upper and lower handle bars are isolated with rubber vibration mounts. The lower handle bar is also suspended via springs. The sprung lower handle bar is designed to “float” off the rubber stops when in use. The spring tension can be adjusted by rotating the spring anchor.

  • Page 21: Noise Reduction

    10.0 Noise reduction Best practices for reducing noise emission: This mower is designed to operate at low engine speeds. Adequate performance can be achieved at little over idle speed. Setting minimal contact between the cylinder and bottom blade will also help reduce noise emissions.

  • Page 22: Declaration Of Conformity

    Vibration test code BS EN ISO 5395-1 Annex G, 2.95 m/s/s 1.5 m/s/s uncertainty Notified body: AVT Reliability, Warrington, Cheshire Technical construction file is kept by: Allett Ltd, Regal House, Airfield Industrial Estate, Hixon, Staffordshire, 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.

  • Page 23: Fault Finding When Mowing

    12.0 Fault finding when mowing Problem Possible cause Remedy Occasional blades of uncut Ground speed too fast. Reduce forward travel speed. grass. Height of cut too high Reduce height of cut. Poorly adjusted bottom blade. Re-adjust bottom blade. Blunt cutting cylinder/bottom blade. Grind/recondition as necessary.

  • Page 24: Specification

    13.0 Specification 13.1 Base machine specification Model name 610mm (24”) Cutting width 508mm (20”) Engine Honda GX160 Honda GX160 Weight 88.5kg 94kg Dimensions (W x L x H) 750mm x 1500mm x 1010mm 920mm x 1500 x 1010 Engine fuel/oil capacity 3.1L Unleaded fuel, 0.6L oil SAE 10W-30 Power output (Net) 3.61kW (4.8hp) @ 3,600rpm...

  • Page 25: Guarantee

    Always insist on genuine Allett spares or parts. Any damage caused to the product through the fitting of parts not made or approved by Allett is not covered by the guarantee.

  • Page 26: Parts Section

    15.0 PARTS SECTION C20/5 and C24/5 PARTS SECTION For C20/5-09-001 ONWARDS For C24/5-09-001 ONWARDS...
  • Page 27 MODEL C20 & C24:- Assembly Sections HANDLE BAR ASS’Y LOWER HANDLE BAR ASS’Y KICKSTAND COUNTERSHAFT ASS’Y ENGINE SIDE ASS’Y HONDA ENGINE GX160 MAINFRAME ASS’Y COUNTERSHAFT BRAKE SIDE ASS’Y FRONT ROLLER ASS’Y REAR ROLLER ASS’Y GRASSBOX ASS’Y...
  • Page 28 MODEL C20 & C24:- Main Frame Assembly (FIG 1) FIG 1...
  • Page 29 MODEL C20 & C24:- Main Frame Assembly BOM (FIG 1) ITEM NO. DESCRIPTION PARTS 20" PARTS 24" USED RH QUICK HEIGHT ADJUSTER C030 LH QUICK HEIGHT ADJUSTER C029 C20 CHASSIS FAB C241 C242 MACHINED 3/8 x 3/4 SCREW C1091 NUT 3/8 NYLOC...
  • Page 30 CSK TOP HAT SPACER C1143 SET SCREW M8 x 20 SM820 GRASSBOX ARM C1173 C1088 GRASSBOX ARM C1174 C1088 3/8 x ¾ SCREW S11011 GROOVED ROLLER ASSY C031 C032...
  • Page 31 MODEL C20 & C24:- Rear Roller Assembly (FIG 1A) FIG 1A...
  • Page 32 MODEL C20 & C24:- Rear Roller Assembly BOM (FIG 1A) ITEM NO. DESCRIPTION PART 20" PART 24" USED REAR ROLLER SHAFT C1024 C1025 DIFFERENTIAL CARRIER BSG024 KEY 1/4" x 1.1/4" Form A AM92888 PINION GEAR STEEL BSG049 OILITE BUSH BSG1102...
  • Page 33 ODEL C20 & C24:- Front Roller Assembly (FIG 1B) FIG 1B...
  • Page 34 MODEL C20 & C24:- Front Roller Assembly BOM (FIG 1B) ITEM NO. DESCRIPTION PART 20" PART 24" USED GROOVED FRONT ROLLER TUBE BSG1262 BSG1263 BEARING 20mm 6004 2RS AM81007 OIL SEAL 42 OD,26 ID, 7 THK AM81524 SEAL SLEEVE AM81523...
  • Page 35 MODEL C20 & C24:- Countershaft Assembly BOM (FIG 2)
  • Page 36 MODEL C20 & C24:- Countershaft Assembly BOM (FIG 2) ITEM NO. DESCRIPTION PART 20" PART 24" USED NUT M6 NYLOC NNM6 WASHER M6 SPRING WASHER M6 SWM6 M6 x 20 SET SCREW SM620 3/8 X 1 UNF CSK SLOTTED S11010...
  • Page 37 MODEL C20 & C24:- Kickstand Assembly (FIG 3)
  • Page 38 MODEL C20 & C24:- Kickstand Assembly BOM (FIG 3) ITEM NO. DESCRIPTION PART 20" PART 24" USED HANDWHEEL FAB C217 LOCATING BOSS C238 CHASSIS FAB C241 C242 SUPPORT PIN C1015 SUPPORT PIN C1018 SET SCREW M6 x 20 SM620 WASHER M6 FORM A...
  • Page 39 MODEL C20 & C24:- Handle Bar Assembly (FIG 4) FIG 4...
  • Page 40 MODEL C20 & C24:- Handle Bar Assembly BOM (FIG 4) ITEM NO. PART NUMBER DESCRIPTION USED WASHER M6 BSG035 ON-OFF SWITCH HARNESS ASSEM BSG1077 CABLE CUTTER CLUTCH BSG1078 CABLE ROLLER DRIVE BSG1077 BRAKE CABLE SM620 HEX SET SCREW SM612 M6 x 12 SET SCREW AM81640 SHAKEPROOF WSH 8.4x15x0.8...
  • Page 41 MODEL C20 & C24:- Lower Handle Bar Assembly (FIG 5) FIG 5...
  • Page 42 MODEL C20 & C24:- Lower Handle Bar Assembly BOM (FIG 5) PART 20” PART 24” ITEM NO. DESCRIPTION USED WASHER M10 FORM Z/C WM10 SET SCREW M10 x 20 SM1025 M10 NYLOC NUT NNM10 SET SCREW M8 x 20 ZC...
  • Page 43 MODEL C20 & C24:- Final Assembly BOM (FIG 6) ITEM NO. DESCRIPTION PART 20" PART 24" USED TUNNEL GUARD 20 BSG1125 BSG1126 CHAINCASE COVER AS045 GRASSBOX ASSEMBLY SG007 SG009 GROMMET PVC AM81264 ALLETT C** DECAL AM81624 AM81625 DECAL - UNION FLAG...
  • Page 44 MODEL C20 & C24:- Grassbox Assembly BOM (FIG 7) ITEM NO. DESCRIPTION PART 20" PART 24" USED GRASSBOX AM89511 AM92510 GRASSBOX PLATE BSG1029 WASHER SPRING M10 SWM10 SET SCREW M10 x 20 M1020 GRASSBOX SWIVEL BUSH BSG1050 GRASSBOX SWIVEL BSG013...
  • Page 45 MODEL CC20G & CC24G:- Cylinder & Groomer Cartridge Assembly (FIG 8) FIG 8 See FIG 6.1 for Cylinder & Groomer Parts...
  • Page 46 MODEL CC20G & CC24G: Cylinder & Groomer Cartridge BOM (FIG 8) PART 20” PART 24” ITEM DESCRIPTION USED DRIVE SIDE PLATE C213 NUMBER NON DRIVE SIDE PLATE C214 CE PLATE T000333 SPRING WASHER M12 SWM12 M12 x 25 SET SCREW SM1225 WASHER M12 WM12...
  • Page 47 MODEL CC20G & CC24G: Cylinder & Groomer Cartridge BOM (FIG 8.1) PART 20” PART 24” ITEM DESCRIPTION USED NUMBER 3/8 x ¾ BOLT S1101 SPRING WASHER 3/8 SW3-8 BEARING 20MM FLANGED AM81008 LFTCB11010 10 BLADED CYLINDER C206 C207 DRIVEN PLATE C1040 ROLLER ADJUSTER KNOB AM81261...
  • Page 48 MODEL CC206:- Cartridge Unit & 6 Blade Cylinder (Fig 9) FIG 9...
  • Page 49 MODEL CC206 & CC246: Cartridge Unit & 6 Blade Cylinder BOM (FIG 9) PART 20” PART 24” ITEM DESCRIPTION USED CYLINDER DRIVE SIDE PLATE C211 NUMBER CYLINDER NON DRIVE SIDE PLATE C212 TIE BAR C1022 C1023 LIFT BAR FAB C204 C205 BOTTOM BLADE CARRIER AZ071...
  • Page 50 MODEL CC2010:- Cartridge Unit & 10 Blade Cylinder (Fig 10) FIG 10...
  • Page 51 MODEL CC2010 & CC2410: Cartridge Unit & 10 Blade Cylinder BOM (FIG 10) PART 20” ITEM DESCRIPTION PART 24” USED NUMBER CYLINDER DRIVE SIDE PLATE C211 CYLINDER NON DRIVE SIDE PLATE C212 TIE BAR C1022 C1023 LIFT BAR FAB C204 C205 BOTTOM BLADE CARRIER AZ071...
  • Page 52 MODEL C20B:- Brush Cartridge Assembly (Fig 11) FIG 11...
  • Page 53 MODEL C20: Brush Cartridge BOM (FIG 11) PART 20” PART 24” ITEM DESCRIPTION USED NUMBER DRIVE SIDE PLATE C215 NON DRIVE SIDE PLATE C216 TIE BAR C1022 C1023 LIFT BAR FAB C204 C205 BRUSH ASSEMBLY C230 SCARIFIER DEFLECTOR C1030 C1031...
  • Page 54 MODEL C20B:- Verticutter Cartridge Assembly (Fig 12) FIG 12...
  • Page 55 MODEL C20: VERTI-CUTTER CARTRIDGE BOM (FIG 12) PART 20” PART 24” ITEM DESCRIPTION USED NUMBER DRIVE SIDE PLATE C215 NON DRIVE SIDE PLATE C216 TIE BAR C1022 C1023 TIE BAR FAB C204 C205 VERTI-CUTTER ASSEMBLY C013 C014 VERTI-CUTTER BLADE C1182...
  • Page 56 MODEL C20SC:- Scarifier Cartridge Assembly (Fig 13) FIG 13...
  • Page 57 MODEL C20: SCARIFIER CARTRIDGE BOM (FIG 13) PART 20” PART 24” ITEM DESCRIPTION USED NUMBER DRIVE SIDE PLATE C215 NON DRIVE SIDE PLATE C216 TIE BAR C1022 C1023 TIE BAR FAB C204 C205 SCARIFIER ASSEMBLY C013 C012 SCARIFIER BLADE C1027...
  • Page 58 MODEL C20: Sorrel Cartridge Assembly (Fig 14) FIG 14...
  • Page 59 MODEL C20: SORREL CARTRIDGE BOM (FIG 14) PART 20” PART 24” ITEM DESCRIPTION USED NUMBER DRIVE SIDE PLATE C215 NON DRIVE SIDE PLATE C216 TIE BAR C1022 C1023 TIE BAR FAB C204 C205 SORREL ASSEMBLY C017 C018 SOLID TINE C1125...
  • Page 60 MODEL C20/24: Turf Rake Cartridge Assembly (Fig 15) FIG 15...
  • Page 61 MODEL C20/24: TURF RAKE CARTRIDGE BOM (FIG 15) ITEM NO. DESCRIPTION C20TR PART No USED C24TR PART No USED LIFT BAR FAB - 20" C204 C205 ACCESSORY DRIVE SIDE PLATE FAB C346 C346 NON DRIVE SIDE PLATE FAB C345 C345 TIE BAR 20"...
  • Page 62 HEIGHT OF CUT BAR BOM (FIG 16) ITEM DESCRIPTION PART N0 PART N0 USED NUMBER SETTING BAR BSG1108 BSG1108 M6 FULL NUT SET PIN M6 X 60 SM630 SM630 SET PIN M6 X 30 SM660 SM660 MODEL C20: HEIGHT OF CUT BAR (Fig 16)
  • Page 63 Notes...

This manual is also suitable for:

C24

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