Bernhard ED3000 - Understanding the Express Dual; General Operating Principles; Basic Grinding Requirements

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EXPRESS DUAL • ED3000
© Bernhard and Company Limited
5. Understanding the Machine
5.1 General Principles
The EXPRESS DUAL is designed to grind reels completely assembled, or as a separate
“loose” reel. A Loose Reel Kit (Available as an optional extra, at additional cost) is required
for this operation.
The basic principle of the EXPRESS DUAL is to grind mowers in exactly the same
conditions that they mow in. The grinding wheel takes the place of the grass, striking the
reel in relatively close proximity to that found in the mowing position.
5.2 Basic Requirements
It is important that grinding the cutting unit, when it remains completely assembled, takes
place under the following conditions:
5.2.1 The reel bearings MUST be in good condition, adjusted correctly and if the roller is to be
located on the roller mounting brackets or the multix brackets, the roller bearings MUST
also be in good condition.
5.2.2 The bedknife must be ground separately on a machine, such as the ANGLEMASTER
bedknife grinder which can guarantee that the blade will be perfectly STRAIGHT and at
whilst mounted on the bedbar.
During the reel grinding process, it is advisable that the bedknife/bedbar assembly is
replaced in the unit after having been ground. On many units the bedknife/bedbar is an
integral part of the frame and contributes to its strength and rigidity.
5.2.3 The reel or bedknife must be adjusted away from one another to allow free rotation (There
should be no reel to bedknife contact!).
5.2.4 It is essential that all work to be carried out on the mowing unit (all mower repairs
– bearings, seals, roller work, etc.) has been completed prior to grinding the reel. The last
operation of all, apart from nal setting reel to bedknife, is the actual grinding of the reel
in-frame.
It is essential that the unit is held totally rm during the grinding process. When in frame
grinding, the front of the unit must be held rmly in the multix brackets or on the front
roller brackets.
5.2.5 It is essential that the unit is held totally rm during the grinding process. When in frame
grinding, the front of the unit must be held rmly in the multix brackets or on the front
roller brackets.
The rear of the unit will be held by the radiused pressure bar at the rear of the grinder.