FAQs

Dennis machines are used across football pitches, rugby pitches, cricket squares, bowling greens, golf environments and other professionally maintained sports turf surfaces. For larger open areas such as polo fields, Estates and golf fairways Dennis gang mowers provide efficient wide-area coverage while maintaining a consistently high-quality finish.

Dennis machines are designed to deliver reliable performance, consistent results and operational flexibility. Combined with long-term product support and customer care, they help grounds teams maintain high-quality sports surfaces throughout the year.

Regular cleaning, inspection, lubrication and routine servicing help maintain machine performance, reliability and longevity. Following the recommended maintenance schedule within your operator manual will support consistent operation throughout the machine's working life.

New Dennis machines are supplied with a 2 year manufacturer warranty. Full warranty details are available from the Dennis sales and support team or your authorised dealer.

Yes. Genuine Dennis replacement parts are available to support ongoing machine maintenance and minimise downtime. you can find the part you need within our Spares shop.

Pedestrian mowers provide precise control and excellent quality of finish, making them ideal for professional sports surfaces such as cricket squares, bowling greens and stadium environments where presentation and consistency are critical.

A cassette mower is a turf maintenance machine that allows different interchangeable cassettes (also known as reels or cylinders) to be fitted to a single power unit. This enables mowing, scarifying, verticutting, brushing and aeration tasks to be completed using one machine.

Interchangeable cassette systems increase operational flexibility and reduce the need for multiple dedicated machines. Grounds teams can carry out a range of maintenance operations while simplifying storage, servicing and equipment management. With 16 types of cassette, the Dennis cassette system provides maximum versatility from a single machine delivering professional-level cutting, scarifying, brushing, vertical-cutting, sorrel rolling, slitting and raking.

Verticutting removes lateral growth and organic material from the turf surface. Regular verticutting supports healthier turf conditions by reducing thatch accumulation and encouraging stronger, finer grass species to dominate. This results in a denser, more uniform playing surface with improved resilience and visual quality. Opting for either a dedicated verticutting machine such as the Dennis Verticutt TT or an interchangeable cassette system mower with verticuttng option will provide effective thatch removal and surface refinement to improve overall turf health and playing performance.

Scarifying removes thatch and organic matter from the surface, improving air movement, water infiltration and turf health while supporting consistent playing conditions. The Dennis cassette range includes: 1 mm, 2 mm or 2 mm tungsten tipped scarifier options which can be used in the following Dennis ranges:

• FT Range
• G660, G760 & G860
• Super Six Range
• ES-510 & ES-610
• ES-760 & ES-860

Regular mowing, verticutting, scarifying and aeration are essential to maintaining surface quality. Consistent maintenance programmes help improve presentation, playability and turf performance throughout the season.

Consistent mowing helps maintain uniform playing characteristics, supports turf health and delivers the presentation standards expected on professional sports surfaces.

Pedestrian mowers provide maximum control and precision for fine turf areas, while gang mowers are designed to cover larger areas efficiently while maintaining a consistent finish.

The parts price list is available in a pdf format, please contact your nearest Dealer.

The new instruction manuals which detail operating instructions as well as parts numbers are in pdf format and can be printed off by visiting the 'Operator Manuals’ section on this website.

They are the same model ( 20 stands for 20” & 510 stands for 510mm). It is the same for the FT610 & FT24

The roller is in 4 sections and the middle part is 2 sections with a shaft coming out of each side. The “outer’s” contain sprung loaded plungers and they have probably stuck and require cleaning and regreasing.

• 17” models (FT &Supersix) = 8 screws
• 20” models (FT, S6, Simplex) = 10 screws
• 24” models (FT, S6, Simplex) = 12 screws
• 22” models (Sport,Sport Ultra G560,Razor Ultra 560) = 8 screws
• 26” model (G660) = 9 screws
• 27” model(G680) = 10 screws
• 30” models (Premier & G760) = 10 screws
• 34” model (G860) = 12 screws
• 36” Model (Premier) = 12 screws
• Gang Mower (single unit) = 8 screws

Shaver Blades on an FT or Supersix model with a 10w bladed cylinder are ‘Shaver Std’ (90 thou)or‘Shaver Thin’ (60 thou)- FT or Supersix models with 5 Bladed Cylinders are ‘Lipped blades’

J20113

• Male coupling(on the machine) = J20221
• Female Coupling (on a Cassette) = J20041
• Buffer Between above = J20222

No, they are now 4 jaw couplings

• 7/8 bore (FT & Supersix models only) = 228102
• Element (All models) = 228103
• ¾ bore (All models) = 228011
  *Please check Shaft Size before ordering

Part A – If you have the old style front roller (with black plastic end caps) the bearings cannot be changed and a complete front roller is required:

• Part number for 20” front roller is 800502
• Part number for 24” front roller is 800503

Part B – If you have the newer style front roller (with a nut through an oil Seal) then the bearings can be changed:

• Part number for the bearing is J209105
• Part number for the oil seal is J209071

• FT Range = 3mm
• Razor Ultra 560 = 3mm
• Simplex Range = 6mm
• G560 & G680 = 6mm
• Supersix Range = 6mm
• G660/G760/G860 = 6mm
• Premier = 6mm
• Gang Mowers = 6mm
• E-Series = 9mm

If you have a question which has not been answered by the above, please email spares@howardsongroup.com with your question and we will reply with an answer as soon as possible.