Ryobi 750r Manuel De L'opérateur page 10

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, causing possible serious
personal injury.
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 clockwise against the blade while holding
the locking rod:
• If using a torque wrench and an 11/16 inch socket
tighten to: 325 - 335 in•lb, 27 - 28 ft.•lb, 37 - 38 N•m.
• In the absence of a torque wrench, use a 11/16 inch
closed-end or socket wrench. Turn 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 clockwise (Fig. 13).
1/4-1/2 turn
Clockwise
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.
10
ASSEMBLY INSTRUCTIONS
Pilot Step
Fig. 12
Fig. 13
REMOVE THE CUTTING BLADE AND
INSTALL THE CUTTING ATTACHMENT
WARNING: To avoid serious personal
injury, always wear gloves while handling or
installing the blade.
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. Hold the locking rod in place by grasping it next to
the boom of the unit (Fig. 14).
3. While holding the locking rod, loosen the nut on
the blade by turning it counterclockwise with a 11/16
inch closed-end or socket wrench (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). Screw the cutting attachment clockwise onto
the output shaft. Tighten securely.
Output Shaft
Bushing
6. Remove the locking rod.
7. Install the cutting attachment shield. Refer to Remove
and Install the Cutting Attachment Shield.
WARNING: T o avoid serious personal injury,
the cutting head guard MUST be in place at
all times while operating the unit as a trimmer.
Counterclockwise
Fig. 14
Cutting
Attachment
Locking Rod
Fig. 15