Troy-Bilt TB27 BC Operator's Manual page 11

CONVERTING THE UNIT FROM A TRIMMER TO A
BRUSHCUTTER
WARNING:
To avoid serious personal injury, always
wear gloves when handling the blade.
WARNING:
To avoid serious personal injury, always stop
the engine and allow the unit to cool before installing or
removing any parts. Never install or remove parts while the
unit is running. Disconnect the spark plug wire to prevent
the unit from starting accidentally.
Removing the Cutting Head
1. Remove the cutting head shield. Refer to Installing and
Removing the Cutting Head Shield.
2. Rotate the cutting head (Fig. 15) until the shaft bushing hole
aligns with the locking rod slot (Fig. 10).
3. Insert the locking rod through the locking rod slot and into the
shaft bushing hole (Fig. 10).
4. Hold the locking rod in place by grasping the other end against
the shaft housing (Fig. 14).
5. While holding the locking rod in place, unscrew the cutting head
by turning it clockwise (Fig. 15).
6. Remove the locking rod (Fig. 15).
7. Remove the blade retainer (Fig. 15).
Installing the Blade
1. Rotate the output shaft bushing until the shaft bushing hole
aligns with the locking rod slot (Fig. 10).
2. Insert the locking rod through the locking rod slot and into the
shaft bushing hole (Fig. 10).
3. Hold the locking rod in place by grasping the other end against
the shaft housing (Fig. 14).
4. While holding the locking rod in place, put the blade on the
output shaft bushing (Fig. 16).
WARNING:
To avoid serious personal injury, make sure
that the pilot hole on the blade is sitting flat against the
output shaft bushing (Fig. 16). The unit will vibrate and the
blade may fly off if the blade is not centered.
5. Place the blade retainer on the output shaft with the flat surface
against the blade (Fig. 16).
6. Screw the nut onto the output shaft (Fig. 16).
7. Tighten the nut counterclockwise with a wrench (Fig. 17):
• If using a torque wrench, torque to: 325 - 335 in•lb, 27 - 28
ft.•lb, 37 - 38 N•m.
• If using a closed-end or socket wrench, turn the nut until the
blade retainer is snug against the blade. Make sure the blade
is installed correctly, then rotate the nut an additional 1/4 to
1/2 turn counterclockwise.
8. Remove the locking rod.
WARNING:
To avoid serious personal injury or damage
to the unit, do not start or operate the unit with the locking
rod inserted into the locking rod slot.
Shaft Housing
Cutting Head
Blade Retainer
Blade Retainer
Output Shaft
Output Shaft
Bushing
11
Fig. 14
Locking Rod
Fig. 15
Nut
Pilot Hole
Blade
Locking Rod
Fig. 16
Fig. 17