17PN-52886 (4/97)
RD6000 (SN 793924 and after)
RD7200 and RD8400 (Figure 12)
Remove cap screws (3) and nuts (4).
CD5060
1
2
3
4
1. Spindle assembly
2. Blade
3. 1/2 NC x 1-1/2” Hex head cap screw GR5
4. 1/2 NC Hex flange locknut
Figure 12. Blade Installation for
RD6000 (SN 793924 and after),
RD7200, and RD8400
Blade Installation
CAUTION
! Your dealer can supply g enuine re-
placement blades. Substitute blades may
not meet original equipment specifica-
tions and may be dangerous.
RD6000 Only
(Figure 11)
Install spindle lock wrench (1) onto spindle pulley as
shown. Install shoulder washer (3) (if removed), small
end up. Make sure blade cutting edge is positioned to
lead in clockwise rotation, as viewed from top of mower .
Excessive blade slipping can cause cup washer to
burn and lose its clamping force. Inspect cup washer
to determine if it is burned or has lost its clamping
force. Replace as necessary.
Install cup washer on cap screw with crown next to
cap screw head, then place blade on cap screw.
Install cap screw and blade assembly into spindle.
Torque cap screw to 125 lbs.-ft. Remove blade
wrench from pulley. Replace belt shields.
RD7200 and RD8400 (Figure 12)
Place cap screws (3) through outer holes in blade and
spindle shaft. Make sure blade cutting edge is
positioned to lead in clockwise rotation, as viewed
from top of mower. Place locknuts (4) on screws and
torque to 85 lbs.-ft.
Blade Sharpening (Figure 13)
Remove blades.
Always sharpen both ends at the same time to
maintain balance. Follow original sharpening pattern.
Do not sharpen blade to a razor edge. Leave from
1/32” to 1/16” blunt edge. Do not sharpen back side.
IMPORTANT
! When sharpening blades, be sure to
balance them. Unbalanced blades will
cause excessive vibration which can dam-
age blade spindle bearings. Vibration may
also cause structural cracks in mower
components.
MAINTAIN CORNER
FOLLOW ORIGINAL
PATTERN
1/32″
CD3627
Figure 13. Blade Sharpening
CHAIN SHIELDING
DANGER
! When this equipment is operated in
populated areas or other areas where
thrown objects could injure persons or
property, full chain or rubber shielding
(which is designed to reduce the possibil-
ity of thrown objects) must be installed. If
this machine is not equipped with full
chain or rubber shielding, operation must
be stopped when anyone comes within
several hundred feet.
Check that chain shielding is in good condition and
replace any damaged chain links.
(Rev. 8/23/01)
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