Troy-Bilt TB514CS Скачать руководство пользователя

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MAINTENANCE AND REPAIR INSTRUCTIONS

Swing the cover down until the tab on the air filter backplate
snaps into place in the slot on the air filter cover (Fig. 37).

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable. An idle adjustment
screw is between the air filter cover and the engine starter
housing (Fig. 38).

NOTE:

Careless adjustments can seriously damage your unit. A
qualified service dealer should make carburetor
adjustments.

Check Fuel

Old fuel is usually the reason for improper unit performance.
Drain and refill the tank with fresh fuel prior to making any
adjustments. Refer to Oil and Fuel Information.

Clean Air Filter

The condition of the air filter is important to the operation of the
unit. A dirty air filter will restrict air flow. This is often mistaken for
an out of adjustment carburetor. Check the condition of the air
filter before adjusting the idle speed screw. Refer to Air Filter
Maintenance.

Adjust Idle Speed Screw

If, after checking the fuel and cleaning the air filter, the engine
still will not idle, adjust the idle speed screw as follows:
1.

Start the engine and let it run at a high idle for a minute to
warm up. Refer to Starting/Stopping Instructions.

Release the throttle trigger and let the engine idle. If the
engine stops, insert a small phillips screwdriver in between
the Air Filter Cover and the Engine Cover (Fig. 38). Turn the
idle speed screw in, clockwise, 1/8 of a turn at a time (as
needed) until the engine idles smoothly.

NOTE:

The cutting attachment should not rotate when the
engine idles.

If the cutting attachment rotates when the engine idles, turn
the idle speed screw counterclockwise 1/8 of a turn at a time
(as needed), until the attachment stops turning.

Checking the fuel, cleaning the air filter, and adjusting the idle speed should solve most engine problems.
If not and all of the following are true:
•

the engine will not idle

•

the engine hesitates or stalls on acceleration

•

there is a loss of engine power

Have the carburetor adjusted by a qualified service dealer.

ROCKER ARM CLEARANCE

This requires disassembly of the engine. If you feel unsure or
unqualified to perform this, take the unit to a qualified service dealer.

NOTE:

Inspect the valve to rocker arm clearance with a feeler
gauge after the first 10 hours of operation and every 25
hours of operation.

•

The engine must be cold when checking or adjusting the
valve clearance.

•

This task should be performed inside, in a clean, dust free area.

Remove the six (6) screws on the back of the engine cover
with a Flat-head or T-25 Torx screwdriver (Fig. 39).

Disconnect the spark plug wire.

Clean dirt from around the spark plug. Remove the spark
plug from the cylinder head by turning a 5/8 in. socket
counterclockwise.

Remove the engine cover (Fig. 39).

Clean dirt from around the rocker arm cover. Remove the
screw holding the rocker arm cover with a large flat blade
screwdriver or Torx T-25 bit (Fig. 40). Remove the rocker arm
cover and gasket.

Pull the starter rope slowly to bring the piston to the top of its
travel, (known as top dead center). Check that:

•

The piston is at the top of its travel while looking in the spark
plug hole (Fig. 41).

•

Both rocker arms move freely, and both valves are closed.

If these statements are not true, repeat this step.
7.

Slide the feeler gauge between the rocker arm and the valve
return spring. Measure the clearance between the valve stem
and rocker arm (Fig. 42). Measure both the intake and
exhaust valves.

The recommended clearance for both intake and exhaust is .003
– .006 in. (.076 – 0.152 mm). Use a standard automotive .005 in.
(0.127 mm) feeler gauge. The feeler gauge should slide between
the rocker arm and valve stem with a slight amount of resistance,
without binding. See Figures 41 and 42.
8.

If the clearance is not within specification:

a. Turn the adjustment nut using a 5/16 inch (8 mm) wrench

or nut driver (Fig. 42).

•

To increase clearance, turn the adjusting nut
counterclockwise.

•

To decrease clearance, turn the adjusting nut clockwise.

b. Recheck both clearances, and adjust as necessary.

Reinstall the rocker arm cover using a new gasket. Torque
the screw to

20–30 in•lb (2.2–3.4 N•m)

10. Check the spark plug and reinstall. See Replacing the Spark

Plug.

11. Replace the spark plug wire.
12. Reinstall the engine cover. Check alignment of the cover

before tightening the screws. Tighten screws.

Fig. 33

Fig. 34

Fig. 35

Fig. 36

Tabs

REPLACING THE SPARK PLUG

Use a replacement part number

753-05255

, Champion spark plug

RDZ19H

, or similar. The correct air gap is

0.025 in. (0.635 mm)

Remove the plug after every 25 hours of operation and check its
condition.
1.

Stop the engine and allow it to cool. Remove the six (6)
screws on the back of the engine cover with a Flat-head or
T-25 Torx screwdriver (Fig. 39).

Grasp the plug wire firmly and pull the cap from the spark plug.

Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a
5/8 in. socket counterclockwise.

Replace cracked, fouled or dirty spark plug. Set the air gap at

0.025 in. (0.635 mm)

using a feeler

gauge (Fig. 43).

Install a correctly-gapped spark plug in the cylinder head. Turn the 5/8 in. socket clockwise until snug.

If using a torque wrench torque to:

110-120 in.•lb. (12.3-13.5 N•m)
Do not over tighten.
SPARK ARRESTOR MAINTENANCE

Remove the rear engine cover. See Rocker Arm Clearance.

With a flat blade screwdriver or Torx T-20 bit and a T-25 bit,
remove the screws attaching the spark arrestor diverter to
the muffler (Fig. 44).

Pull the the spark arrestor diverter out of the muffler. Remove
the spark arrestor diverter.

Remove the spark arrestor screen from the spark arrestor
diverter.

Clean the spark arrestor screen with a wire brush or replace it.

Reinstall the spark arrestor screen, spark arrestor diverter
and screws.

CLEANING

Use a small brush to clean off the outside of the unit. Do not use strong detergents. Household cleaners
that contain aromatic oils such as pine and lemon, and solvents such as kerosene, can damage plastic
housing or handle. Wipe off any moisture with a soft cloth.

STORAGE

•

Never store the unit with fuel in the tank where fumes may reach an open flame or spark.

•

Allow the engine to cool before storing.

•

Lock up the unit to prevent unauthorized use or damage.

•

Store the unit in a dry, well-ventilated area.

•

Store the unit out of the reach of children.

LONG TERM STORAGE

Drain all gasoline from the gas tank into a container. Do not use gas that has been stored for more
than 60 days. Dispose of the old gasoline in accordance to Federal, State, and Local regulations.

Start the engine and allow it to run until it stalls. This ensures that all gasoline has been drained
from the carburetor.

Allow the engine to cool. Remove the spark plug and put 5 drops of high quality motor oil into the
cylinder. Pull the starter rope slowly to distribute the oil. Reinstall the spark plug.

NOTE:

Remove the spark plug and drain all of the oil from the cylinder before attempting to start the
trimmer after storage.

Change the oil, referring to Changing the Oil. Dispose of the old oil in accordance to Federal, State
and Local regulations.

Thoroughly clean the unit and inspect for any loose or damaged parts. Repair or replace damaged
parts and tighten loose screws, nuts or bolts. The unit is ready for storage.

TRANSPORTING

•

Allow the engine to cool before transporting.

•

Secure the unit while transporting.

•

Drain the gas tank before transporting.

•

Tighten gas cap before transporting.

WARNING:

To avoid serious personal injury, always turn your trimmer off and allow it

to cool before you clean or maintain it.