Troy-Bilt TB90BC - Manual (Page 10)

10
ASSEMBLY INSTRUCTIONS
Shield
Mount
Locking Rod
Cutting
Blade
Blade Retainer Nut
Output Shaft
Bushing
Pilot Hole
Fig. 12
Fig. 11
Pilot Step
Install the Cutting Blade
WARNING: To avoid serious personal injury,
always wear gloves while handling or
installing the blade.
4. Place the cutting blade on the output shaft bushing
(Fig. 11).
5. Make sure that the cutting blade is centered on the
pilot step and sitting flat against the output shaft
bushing (Fig. 12).
WARNING: If the cutting blade is off-center,
the unit will vibrate, and the blade may fly
off, which can cause serious personal injury.
Fig. 13
1/4-1/2 turn
Counterclockwise
6. Align the shaft bushing hole with the locking rod
slot and insert the locking rod into the bushing hole
(Fig. 8, Pg. 9).
7. Put the blade retainer and nut on the output shaft.
Make sure that the blade is installed correctly.
8. Tighten nut counterclockwise against the blade while
holding the locking rod;
• If using a torque wrench and an 5/8 inch socket tighten
to: 325 - 335 in•lb, 27 - 28 ft.•lb, 37 - 38 N•m.
• Without a torque wrench, use a 5/8 inch closed-end or
socket wrench, turning the nut until the blade retainer
is snug against the shaft bushing. Make sure that the
blade is installed correctly, then rotate the nut an
additional 1/4 to 1/2 turn counterclockwise (Fig. 13).
9. Remove the locking rod from the locking rod slot.
WARNING: To avoid serious personal injury
or damage to the unit, do not start or
operate this unit with the locking rod in the
locking rod slot.
WARNING: Do not sharpen the cutting blade.
Sharpening the blade can cause the blade tip
to break off while in use. This can result in
severe personal injury. Replace the blade.
REMOVE THE CUTTING BLADE AND INSTALL
THE CUTTING ATTACHMENT
Remove the Cutting Blade
WARNING: To avoid serious personal injury,
always wear gloves while handling or
installing the blade.
1. Align the shaft bushing hole with the locking rod
slot and insert the locking rod into the bushing hole
(Fig. 8, Pg. 9).
2. Hold the locking rod in place by grasping it next to
the boom of the unit (Fig. 14).
Clockwise
Fig. 14