HART HAC121MB Manual

WARNING!

To reduce the risk of injury, user must read and understand the operator's manual
for their lawn mower and this instruction sheet. Always wear eye protection with
side shields marked to comply with ANSI Z87.1. Ensure compatibility and fit before
using this accessory. Do not use this accessory if a part is damaged or missing. If
you are not comfortable performing any of the functions described in these instruc-
tions, take your unit to a qualified service center.

WARNING:

Always protect hands by wearing heavy gloves and/or wrapping the cutting edges
of the blade with rags and other material when performing blade maintenance.
Contact with the blade could result in serious personal injury.

REPLACING THE CUTTING BLADE

See Figures 1 - 2.
 Stop the motor and remove the start key. Allow the blade to come to a complete
stop.
 Remove the battery pack from the battery port.
 Turn the mower on its side.
 Wedge a block of wood between the blade and mower deck to prevent the blade
from turning.
 Loosen the blade nut by turning it counterclockwise (as viewed from bottom of
mower) using a 15 mm wrench or socket (not provided).
 Remove the blade nut, spacer, blade insulator, and blade. Do not remove the
hub or the adaptor.
WARNING:
If the hub and/or the adaptor have been removed, replace them before placing
blade on the shaft. Failure to do so could cause the blade to detach or become
unbalanced since blade will not tighten properly, which can result in serious per-
sonal injury.
 Place the new blade on the shaft against the blade posts on the hub. Ensure
blade is properly seated with shaft going through center blade hole and the two
blade posts on the hub inserted into their respective holes on the blade. Make
sure it is installed with the curved ends pointing up toward the mower deck and
not down toward the ground. When seated properly, the blade should be flat.
 Replace the blade insulator and spacer, then thread the blade nut on the shaft
and finger tighten.
NOTE: Make certain all parts are replaced in the exact order in which they were
removed.
 Torque the blade nut down clockwise using a torque wrench (not provided) to
ensure the bolt is properly tightened. The recommended torque for the blade nut
is 310 – 360 in.lbs.
WARNING:
Ensure blade is properly seated and the blade nut is tightened to the torque speci-
fications above. Failure to properly attach the blade could cause it to come loose
and result in possible serious personal injury.
Hart Consumer Products, Inc.
LAWN MOWER BLADE
HAC121MB/HAC121MBVNM
For use with HART
21 in. Lawn Mower ONLY
P.O. Box 1348
Anderson, SC 29622, USA
1.800.776.5191
www.HARTtools.com
40 Volt
™
FIG. 1
A
C
A - Blade (lame, hoja)
B - Wrench (clé, llave)
C - Block of wood (pièce de bois, bloque de
madera)
FIG. 2
D
E
F
I
J
A - Shaft (arbre, eje)
B - Hub (moyeu, buje)
C - Blade post (round) [tiges pour lame (ronde),
montantes de cuchilla (redondo)]
D - Blade post (half circle) [tige pour lame (demi-
cercle), puerto de la hoja (semicircular)]
E - Blade (lame, hoja)
F - Blade hole (half circle) [trou pour lame (demi-
cercle), orificio de la hoja (semicircular)]
G - Blade hole (round) [trou pour lame (ronde),
orificio de la hoja (redondo)]
H - Blade insulator (isolant de lame, aislante de
hoja)
I - Spacer (entretoise, separador)
J - Blade nut (écrou de lame, tuerca de la hoja)
9-23-19 (REV:01)
B
A
B
C
G
H
998000043