Hayter Mowers Condor hydrostatic Drive 510D - Manual (Page 41)

1.41 1.41 MAINTENANCE
Verge Attachment continued
Cutterhead grinding continued: When grinding
operations are necessary it is essential that both
cylinder and bottom blade are ground at the same
time. The only exception to this rule is when a new
cylinder is fitted in which case it is only neces-
sary to grind the bottom blade. All such grinding
operations should be carried out by your dealer on
a quality, well maintained cylinder / bottom blade
grinding machine.
Cutterhead bottom blade replacement: Remove
the bottom blade holder by removing the three
fixing bolts at each end and withdrawing from the
cutterhead. Remove the worn bottom blade and
discard the countersunk retaining screws. Fit the
new blade to the holder and loosely assemble with
new retaining screws. Tighten the centre retaining
screws to a torque of 54 Nm (40 lbs ft). Continue
by tightening the remaining fasteners to the same
torque by working from the centre out towards the
blade ends.
The new bottom blade must be ground on its hold-
er prior to refitting to the cutterhead.
Adjust the cutting cylinder position to give ade-
quate clearance for fitting the new bottom blade
holder. Refit the bottom blade holder assembly
using new fixing bolts and tighten securely. Finally
adjust the cylinder to the bottom blade, refer to
CUTTERHEAD CYLINDER TO BOTTOM
BLADE ADJUSTMENT.
Rotary Attachment
WARNING: PREVENT ACCIDENTS - NEVER
work on the cutterblades unless the spark plug
lead has been removed. The cutterblades have
sharp edges. ALWAYS wear strong gloves to
protect your hands when working on the cutter-
blades. DO NOT operate tools towards the cut-
ting edges to avoid the risk of injury should the
tool slip. ALWAYS use genuine Hayter replace-
ment parts.
WARNING: PREVENT ACCIDENTS -
ALWAYS renew both cutterblades on each bot-
tom plate to ensure the cutting mechanism is
balanced, NEVER replace cutterblades individ-
ually. ALWAYS use new bolts, nuts and washers
when fitting new cutterblades.