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New Holland 918H - User Manual

New Holland 918H
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New Holland
Flail Mower Specifications
918H 918L
Page 1 of 1
MODEL 918H 918H 918H
S
IZE 60-inch 71-inch 91-inch
PTO hp rating............................................................................................................................................................70...............................................................................................
Rated speed (rpm)...................................................................................................................................................540..............................................................................................
Nominal cutting width, in. (mm) 60 (1524.0) 71 (1803.4) 88 (2235.2)
Offset adjustment to right, in. (mm) 28 (711.2) 28 (711.2) 24 (609.6)
Offset adjustment to left, in. (mm) n/a 46
Cutting height range, in. (mm) 0.5 to 5 (13 to 127) 0.5 to 5 (13 to 127) 0.8 to 5 (19 to 127)
Cutting height adjustment increments, in. (mm).................................................................................................1 (25.4) ..........................................................................................
Rotor diameter, tip-to-tip, in. (mm) 15.8 (401.32) 15.8 (401.32) 16.50 (419.1)
Rotor rotation.................................................................................................................................................forward/reverse ....................................................................................
Guage roller diameter, in. (mm) ........................................................................................................................5.2 (132.1)........................................................................................
Blade mounting .................................................................................................................................................single hinge.......................................................................................
Blade type ............................................................................................................................................................standard..........................................................................................
Number of blades 80 96 128
Blade tip speed (fpm) 9237 9237 9659
Rotor shaft speed (rpm).........................................................................................................................................2236.............................................................................................
Thickness of flail deck, in. (mm) ........................................................................................................................0.16 (4.0).........................................................................................
Thickness of flail ends, in. (mm) ........................................................................................................................0.24 (6.0).........................................................................................
Lift linkage.............................................................................................................................................................flexible...........................................................................................
Three-point hitch category .....................................................................................................................................I or II ............................................................................................
Weight, lbs. (kg) 697 (316.2) 792 (359.3) 957 (434.1)
MODEL 918L 918L
SIZE 50-inch 60-inch
PTO hp rating ...........................................................................................................................30...............................................................................................................................
Rated speed (rpm) ..................................................................................................................540..............................................................................................................................
Nominal cutting width, in. (mm) 50 (1270) 60 (1524)
Offset adjustment to right, in. (mm) 10 (254) 20 (508)
Offset adjustment to left, in. (mm) ..........................................................................................n/a...............................................................................................................................
Cutting height range, in. (mm)...................................................................................0.75 to 3 (19 to 76) .................................................................................................................
Cutting height adjustment increments, in. (mm)..............................................................0.75 (19.1) ........................................................................................................................
Rotor diameter, tip-to-tip, in. (mm) .................................................................................13.5 (342.9).......................................................................................................................
Rotor rotation .......................................................................................................................reverse ...........................................................................................................................
Guage roller diameter, in. (mm).........................................................................................3.5 (88.9) .........................................................................................................................
Blade mounting.................................................................................................................single hinge .......................................................................................................................
Blade type................................................................................................................................fine ..............................................................................................................................
Number of blades 80 96
Blade tip speed (fpm) ............................................................................................................7,522.............................................................................................................................
Rotor shaft speed (rpm)........................................................................................................2,137.............................................................................................................................
Thickness of flail deck, in. (mm).........................................................................................0.1 (2.5)..........................................................................................................................
Thickness of flail ends, in. (mm).........................................................................................0.2 (5.0)..........................................................................................................................
Lift linkage ..............................................................................................................................fixed .............................................................................................................................
Three-point hitch category........................................................................................................ I ................................................................................................................................
Weight, lbs. (kg) 348 (157.9) 383 (173.7)
Safety begins with a thorough understanding of
the equipment. Always make sure you and
your operators read the Operator’s Manual
before using the equipment. Pay close
attention to all safety and operating
decals and never operate machinery
without all shields, protective devices
and structures in place.
Design, materials and/or specifications are subject to
change without notice and without liability therefor.
Specifications are applicable to units sold in Canada, the
United States, its territories and possessions, and may
var y outside these areas.
© 2008 CNH America LLC
New Holland is a registered trademark of CNH America LLC.
Visit our Web site at www.newholland.com/na. Or, call toll-free 866-NEW-HLND (866-639-4563).
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Overview

The New Holland Flail Mower, available in 918H and 918L series, is an agricultural implement designed for cutting and mulching various types of vegetation. These mowers are characterized by their robust construction and a range of specifications tailored to different operational needs and tractor capabilities.

Function Description:

The primary function of the New Holland Flail Mower is to efficiently cut and shred plant material, leaving a fine mulch. This is achieved through a rotating shaft equipped with numerous flails (blades) that strike and pulverize the vegetation. The flail design allows for effective cutting of diverse materials, from grass and weeds to brush and crop residue, while minimizing the risk of damage from obstacles. The mulching action helps return organic matter to the soil, improving soil health and suppressing weed growth. The adjustable cutting height and offset capabilities provide versatility for various field conditions and tasks, such as maintaining pastures, clearing overgrown areas, or preparing seedbeds.

Important Technical Specifications:

918H Series:

  • Models: 60-inch, 71-inch, 91-inch
  • PTO hp rating:
    • 60-inch: Not specified (implied to be within a certain range for the series)
    • 71-inch: 70 hp
    • 91-inch: Not specified
  • Rated speed (rpm):
    • 60-inch: Not specified
    • 71-inch: 540 rpm
    • 91-inch: Not specified
  • Nominal cutting width, in. (mm):
    • 60-inch: 60 (1524.0)
    • 71-inch: 71 (1803.4)
    • 91-inch: 88 (2235.2)
  • Offset adjustment to right, in. (mm):
    • 60-inch: 28 (711.2)
    • 71-inch: 28 (711.2)
    • 91-inch: 24 (609.6)
  • Offset adjustment to left, in. (mm):
    • 60-inch: n/a
    • 71-inch: 4
    • 91-inch: 6
  • Cutting height range, in. (mm):
    • 60-inch: 0.5 to 5 (13 to 127)
    • 71-inch: 0.5 to 5 (13 to 127)
    • 91-inch: 0.8 to 5 (19 to 127)
  • Cutting height adjustment increments, in. (mm):
    • 60-inch: Not specified
    • 71-inch: 1 (25.4)
    • 91-inch: Not specified
  • Rotor diameter, tip-to-tip, in. (mm):
    • 60-inch: 15.8 (401.32)
    • 71-inch: 15.8 (401.32)
    • 91-inch: 16.50 (419.1)
  • Rotor rotation:
    • 60-inch: Not specified
    • 71-inch: forward/reverse
    • 91-inch: Not specified
  • Guage roller diameter, in. (mm):
    • 60-inch: Not specified
    • 71-inch: 5.2 (132.1)
    • 91-inch: Not specified
  • Blade mounting:
    • 60-inch: single hinge
    • 71-inch: single hinge
    • 91-inch: Not specified
  • Blade type:
    • 60-inch: standard
    • 71-inch: standard
    • 91-inch: Not specified
  • Number of blades:
    • 60-inch: 80
    • 71-inch: 96
    • 91-inch: 128
  • Blade tip speed (fpm):
    • 60-inch: 9237
    • 71-inch: 9237
    • 91-inch: 9659
  • Rotor shaft speed (rpm):
    • 60-inch: Not specified
    • 71-inch: 2236
    • 91-inch: Not specified
  • Thickness of flail deck, in. (mm):
    • 60-inch: Not specified
    • 71-inch: 0.16 (4.0)
    • 91-inch: Not specified
  • Thickness of flail ends, in. (mm):
    • 60-inch: Not specified
    • 71-inch: 0.24 (6.0)
    • 91-inch: Not specified
  • Lift linkage:
    • 60-inch: Not specified
    • 71-inch: flexible
    • 91-inch: Not specified
  • Three-point hitch category:
    • 60-inch: Not specified
    • 71-inch: I or II
    • 91-inch: Not specified
  • Weight, lbs. (kg):
    • 60-inch: 697 (316.2)
    • 71-inch: 792 (359.3)
    • 91-inch: 957 (434.1)

918L Series:

  • Models: 50-inch, 60-inch
  • PTO hp rating:
    • 50-inch: 30 hp
    • 60-inch: Not specified
  • Rated speed (rpm):
    • 50-inch: 540 rpm
    • 60-inch: Not specified
  • Nominal cutting width, in. (mm):
    • 50-inch: 50 (1270)
    • 60-inch: 60 (1524)
  • Offset adjustment to right, in. (mm):
    • 50-inch: 10 (254)
    • 60-inch: 20 (508)
  • Offset adjustment to left, in. (mm):
    • 50-inch: n/a
    • 60-inch: Not specified
  • Cutting height range, in. (mm):
    • 50-inch: 0.75 to 3 (19 to 76)
    • 60-inch: Not specified
  • Cutting height adjustment increments, in. (mm):
    • 50-inch: 0.75 (19.1)
    • 60-inch: Not specified
  • Rotor diameter, tip-to-tip, in. (mm):
    • 50-inch: 13.5 (342.9)
    • 60-inch: Not specified
  • Rotor rotation:
    • 50-inch: reverse
    • 60-inch: Not specified
  • Guage roller diameter, in. (mm):
    • 50-inch: 3.5 (88.9)
    • 60-inch: Not specified
  • Blade mounting:
    • 50-inch: single hinge
    • 60-inch: Not specified
  • Blade type:
    • 50-inch: fine
    • 60-inch: Not specified
  • Number of blades:
    • 50-inch: 80
    • 60-inch: 96
  • Blade tip speed (fpm):
    • 50-inch: 7,522
    • 60-inch: Not specified
  • Rotor shaft speed (rpm):
    • 50-inch: 2,137
    • 60-inch: Not specified
  • Thickness of flail deck, in. (mm):
    • 50-inch: 0.1 (2.5)
    • 60-inch: Not specified
  • Thickness of flail ends, in. (mm):
    • 50-inch: 0.2 (5.0)
    • 60-inch: Not specified
  • Lift linkage:
    • 50-inch: fixed
    • 60-inch: Not specified
  • Three-point hitch category:
    • 50-inch: I
    • 60-inch: Not specified
  • Weight, lbs. (kg):
    • 50-inch: 348 (157.9)
    • 60-inch: 383 (173.7)

Usage Features:

The New Holland Flail Mowers offer several features that enhance their usability and adaptability. The different models within both the 918H and 918L series provide a range of cutting widths, allowing users to select a mower that best suits their tractor's horsepower and the size of the area to be maintained. The offset adjustment capability, present in both series, is crucial for working close to fences, trees, or other obstacles without requiring the tractor to drive directly over them, thus improving maneuverability and safety.

The adjustable cutting height, with specified ranges and increments, enables precise control over the finished cut, whether for fine turf maintenance or rough brush clearing. The rotor rotation direction (forward/reverse on some 918H models, reverse on 918L) can influence the cutting action and material distribution, offering flexibility for different conditions. The "single hinge" blade mounting system, common across models, suggests a robust and potentially easy-to-maintain blade attachment. The "standard" and "fine" blade types indicate options for different mulching requirements, with "fine" blades likely providing a more thorough shredding action.

The three-point hitch category (Category I or II for 918H, Category I for 918L) ensures compatibility with a wide range of agricultural tractors. The flexible lift linkage on some 918H models allows for better ground contour following, while the fixed linkage on 918L models suggests a simpler, more rigid attachment. The varying PTO horsepower ratings and weights across the models help users match the mower to their tractor's capabilities, ensuring optimal performance and preventing overload. The high blade tip speeds (e.g., 9237 fpm for 918H 60-inch and 71-inch, 7522 fpm for 918L 50-inch) indicate efficient cutting and mulching power.

Maintenance Features:

While specific maintenance features are not extensively detailed in the provided specifications, the design of flail mowers generally facilitates straightforward maintenance. The "single hinge" blade mounting implies that individual flails can be replaced relatively easily if damaged or worn. Regular inspection of the blades, rotor shaft, gauge roller, and PTO driveline is essential for safe and efficient operation. The specified thicknesses of the flail deck and flail ends (e.g., 0.16 in. / 4.0 mm and 0.24 in. / 6.0 mm for 918H 71-inch, 0.1 in. / 2.5 mm and 0.2 in. / 5.0 mm for 918L 50-inch) indicate the structural integrity of critical components, suggesting durability under typical operating conditions.

The availability of a comprehensive Operator's Manual is highlighted as crucial for safety and proper operation, emphasizing the importance of understanding the equipment's maintenance schedule, lubrication points, and adjustment procedures. The "Think Safety" message underscores the need for operators to be familiar with all safety decals and to ensure all shields and protective devices are in place before operating the machinery. This commitment to safety is an indirect maintenance feature, as it promotes practices that prevent damage to both the equipment and the operator. Regular cleaning to prevent buildup of debris, especially around the rotor and gauge roller, would also contribute to the longevity and performance of the mower.

New Holland 918H Specifications

General IconGeneral
BrandNew Holland
Model918H
CategoryLawn Mower
LanguageEnglish

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