Troy-Bilt TB590BC manual 5

Fig. 8

ASSEMBLY INSTRUCTIONS

WARNING: The gear housing gets hot with use. It can result in injury to the operator. The housing remains hot for a short time even after the unit is turned off. Do not touch the gear housing until it has cooled.

• Without a torque wrench, use a

13 mm 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

Pilot Step

Remove the Cutting Attachment

1. Align the shaft	Shaft Bushing
bushing hole
	Hole
with the locking
rod slot and	Locking
insert the locking
rod into the shaft	Rod Slot
bushing hole	Locking
(Fig. 8).	Rod

2.Hold the locking

rod in place by

Output Shaft

Output

Shaft

Bushing

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.

Fig. 12

Fig. 13

grasping it next to the boom of the unit (Fig. 9).

3.While holding the locking rod, remove the cutting attachment by turning it clockwise off of the output shaft (Fig. 10). Store the cutting attachment for future use.

NOTE: The blade retainer under the cutting attachment will be used when installing the cutting

Fig. 9

blade.

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

Cutting

Attachment

Locking

Rod

Locking

Rod Slot

Fig. 10

WARNING: To avoid serious personal injury, always wear gloves while handling or installing the blade.

Install the Cutting		Blade	Nut
Blade		Retainer	Cutting
4.	Place the	Pilot
			Blade
	cutting blade	Hole	Shield
	on the output
	shaft bushing	Output	Mount
	(Fig. 11).	Shaft
5.	Make sure that	Bushing
	the cutting	Locking
	blade is	Rod
	centered on the		Fig. 11
	pilot step and

sitting flat against the output shaft bushing (Fig. 11).

6.Align the shaft bushing hole with the locking rod slot and insert the locking rod into the bushing hole (Fig. 8).

WARNING: If the cutting blade is off-center, the unit will vibrate and the blade may fly off, causing possible serious personal injury.

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 a 13 mm socket tighten to: 325 - 335 in•lb, 27 - 28 ft.•lb, 37 - 38 N•m.

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	Clockwise
	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	Fig. 14
	blade by turning it clockwise
	with a 13 mm 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).

Place the blade	Cutting Attachment
retainer on the
output shaft with the	Blade
flat surface against
	Retainer
the output shaft
	Output
bushing (Fig. 15).
Screw the cutting	Shaft
attachment	Bushing
counterclockwise	Locking
onto the output	Rod
shaft. Tighten
securely.	Fig. 15

NOTE: The blade retainer must be installed on the output shaft in the position shown for the cutting attachment to work correctly.

6.Remove the locking rod.

7.Install the cutting attachment shield. Refer to Remove and Install the Cutting Attachment Shield.

5