Troy-Bilt TB590 EC Operator'S Manual Download Page 5

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OPERATING THE EZ-LINK® SYSTEM

The EZ-LINK® system enables the use of these optional Add-Ons:
Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AF720
Hedge Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  AH720
Brushcutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BC720*
Cultivator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  GC720
Edger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LE720
Pole Saw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  PS720
Straight Shaft Trimmer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  SS725
Turbo Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  TB720
*Do NOT use this attachment with an electric powered unit.

Installing the Cutting Attachment or Add-On

NOTE:

Place the unit on the ground or on a work

bench to make add-on installation or removal
easier.

1. Turn knob counterclockwise to loosen (Fig. 14).
2. While firmly holding the add-on, push it straight into the EZ-LINK® coupler (Fig. 13).

NOTE:

Aligning the release button with the guide recess will help installation (Fig. 12).

3. Turn the knob clockwise to tighten (Fig. 14).

For edging (when using the line head cutting
attachment with EZ-LINK® models), lock the
release button of the cutting attachment into
the 90° edging hole (Fig. 14).

Removing the Cutting Attachment or Add-On

1. Turn the knob counterclockwise to loosen

(Fig. 14).

2. Press and hold the release button (Fig. 12).
3. While firmly holding the upper shaft housing, pull the cutting attachment or

add-on straight out of the EZ-LINK® coupler (Fig. 13).

WARNING:

OVERFILLING OIL CRANKCASE MAY CAUSE

SERIOUS PERSONAL INJURY. Check and maintain the proper oil level
in the crank case; it is important and cannot be overemphasized. Check
the oil before each use and change it as needed. See Changing the Oil.

RECOMMENDED OIL TYPE

Using the proper type and weight of oil in
the crankcase is extremely important.

Check the oil before each use and change the oil
regularly. Failure to use the correct oil, or using
dirty oil, can cause premature engine wear and
failure.
Use a high-quality SAE 30 weight oil of API (American
Petroleum Institute) service class SF, SG, SH.

ADDING OIL TO CRANKCASE: INITIAL USE
NOTE:

This unit is shipped without oil. In order

to avoid damage to the unit, put oil in the
crankcase before you attempt to start the
unit.

Your unit is supplied with one 3.04 fluid oz. (90
ml.) bottle of SAE 30 SF, SG, SH oil (Fig. 15).

NOTE:

Save the bottle of oil. It can be used to

measure the correct amount during future oil
changes. See Changing the Oil.

1. Unscrew the top of the bottle of oil and

remove the paper seal covering the opening.
Replace the top. Next, cut the tip off the
funnel spout (Fig. 15).

2. Tip unit so that the back of the engine is

facing up in a vertical position.

3. Remove the oil fill plug from the crankcase (Fig. 17).
4. Pour the entire bottle of oil into the oil fill hole (Fig. 16).

NOTE:

Never add oil to the fuel or fuel tank.

5. Wipe up any oil that may have spilled and reinstall the oil fill plug.
Check oil before each use and change as needed. Refer to Checking the Oil Level.

RECOMMENDED FUEL TYPE

Old fuel is the primary reason for improper unit performance. Be sure to use
fresh, clean, unleaded gasoline.

NOTE:

This is a four cycle engine. In order to avoid damage to the unit, do not

mix oil with gasoline.

Definition of Blended Fuels

Today's fuels are often a blend of gasoline and oxygenates such as ethanol,
methanol or MTBE (ether). Alcohol-blended fuel absorbs water. As little as 1%
water in the fuel can make fuel and oil separate or form acids when stored.
Use fresh fuel (less than 60 days old), when using alcohol-blended fuel.

Using Blended Fuels

If you choose to use a blended fuel, or its use is unavoidable, follow
recommended precautions:
• Always use fresh unleaded gasoline
• Use the fuel additive STA-BIL® or an equivalent
• Drain tank and run the engine dry before storing unit

Using Fuel Additives

The use of fuel additives, such as STA-BIL® Gas Stabilizer or an equivalent,
will inhibit corrosion and minimize the formation of gum deposits. Using a fuel
additive can keep fuel from forming harmful deposits in the carburetor for up
to six (6) months. Add 0.8 oz. (23 ml.) of fuel additive per gallon of fuel
according to the instructions on the container. NEVER add fuel additives
directly to the unit's gas tank.

FUELING THE UNIT

1. Remove the fuel cap (Fig. 18).

2. Place the gas container’s spout into the fill

hole on the fuel tank (Fig. 18) and fill the tank.

NOTE:

Do not overfill the tank.

OIL AND FUEL INFORMATION

Funnel

Spout

Fig. 15

WARNING:

Remove fuel cap slowly

to avoid injury from fuel spray. Never
operate the unit without the fuel cap
securely in place.

WARNING:

Add fuel in a clean, well ventilated outdoor area. Wipe

up any spilled fuel immediately. Avoid creating a source of ignition for
spilt fuel. Do not start the engine until fuel vapors dissipate.

WARNING:

Gasoline is extremely flammable. Ignited vapors may

explode. Always stop the engine and allow it to cool before filling the
fuel tank. Do not smoke while filling the tank. Keep sparks and open
flames at a distance from the area.

CAUTION:

Add-ons are to be used

in the primary hole only. Using the wrong
hole could lead to personal injury or
damage to the unit.

Upper Shaft

Housing

Fig. 13

Lower Shaft

Housing

Primary Hole

Knob

Fig. 14

90˚ Edging Hole

(Trimmer Only)

Fig. 17

Oil Fill Plug

O-Ring

Oil Fill Hole

Fig. 16

REMOVE THE CUTTING BLADE AND INSTALL THE CUTTING ATTACHMENT
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. 6).

2. Hold the locking rod in place by grasping it next

to the boom of the unit (Fig. 7).

3. While holding the locking rod, loosen the nut

on the blade by turning it clockwise with a 13
mm closed-end or socket wrench (Fig. 10).

4. Remove the nut, blade retainer and blade

(Fig. 9). 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. 6). Place the blade
retainer on the output shaft with the flat
surface against the output shaft bushing
(Fig. 11). 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 (Fig. 11).

6. Remove the locking rod.
7. Install the cutting attachment shield.

Refer to Remove and Install the

Cutting Attachment Shield.

ASSEMBLY INSTRUCTIONS

Fig. 10

Tighten

Loosen

Top View

Cutting Attachment