Remove The Cutting Blade And Install The Cutting Attachment - Troy-Bilt TB490BC Operator's Manual

5. Makesurethatthecuttingbladeis centered onthe
pilot stepandsittingf!atagainst t heoutputshaft
bushing (Fig.12),
I _III_ WARNING: If the Cutting blade is off- I
Allk I center, the unit will vibrate and the blade I
may fly off, causing possible serious
I personal injury. I
Pilot Step
REMOVE THE CUTTING BLADE AND
INSTALL THE CUTTING ATTACHMENT
WARNING: TO avoid serious personal
I Allk l injury, always wear gloves while handling or
l_ l installing the blade. 1
Remove the Cutting Blade
1. Align the shaft bushing hole with the locking rod slot
and insert the locking rod into the bushing hole (Fig. 8).
2.
3.
Hold the locking rod in place by grasping it next to
the boom of the unit (Fig. 14).
While holding the locking rod, loosen the nut on the
blade by turning it clockwise with a 5/8 inch closed-
end or socket wrench (Fig. 14).
Fig. 12
6. Align the shaft bushing hole with the locking rod
slot and insert the locking rod into the bushing hole
(Fig. 8).
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.,Ib, 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).
Clockwise
Fig. 14
4. Remove the nut, blade retainer and blade. Store the
nut and blade together for future use in a secure
place. Store out of children's reach.
Install the Cutting Attachment
5. Align the shaft bushing hole with the locking rod slot and
insert the locking rod into the shaft bushing hole (Fig. 8).
Place the blade retainer on the output shaft with the fiat
surface against the output shaft bushing (Fig. 15). Screw
the cutting attachment counterclockwise onto the output
shaft. Tighten securely.
NOTE: The blade retainer must be installed on the output
shaft in the position shown for the cutting
attachment to work correctly.
Cutting Attachment _
1/4-1/2 turn
Counterclockwise
Blade Retainer.
Fig.
13
9. Remove the locking rod from the locking rod slot.
A I WARNING: TO avoid serious personal I
Allk I injury or damage to the unit, do not start or I
operate this unit with the locking rod in the
I locking rod slot.
WARNING: Do not sharpen the Cutting blade. 1
Sharpening the blade can cause the blade tip I
to break off while in use. This can result in I
severe personal injury, Replace the blade, l
,
7.
Output Shaft
Bushing
Locking Rod
Fig. 15
Remove the locking rod.
Install the cutting attachment shield. Refer to Remove
and Install the Cutting Attachment Shield.
WARNING: To avoid serious personal injuryl I
the cutting head guard MUST be in place at
a t mes wh e operat ng the unt as a tr miner.
9