Operating Instructions; Maintenance And Repair Instructions - Troy-Bilt TB4HB EC Manual Del Operador

STARTING/STOPPING INSTRUCTIONS
IF USING THE OPTIONAL ELECTRIC STARTER OR POWER START BIT™ ACCESSORY
IF... the engine does not start, go back to step 3.
IF... the engine fails to start after a few attempts, move the choke lever to Position 3 and
squeeze the throttle control. Press and hold the electric starter or drill ON (I) button for
2-second intervals until the unit starts.
IF WARM... If the engine is already warm, go back to step 7.
STOPPING INSTRUCTIONS
1. Release your hand from the trigger. Allow the engine to cool down by idling.
2. Press and hold the On/Off switch in the OFF (O) position until the unit comes to a complete stop
(Fig. 8).

OPERATING INSTRUCTIONS

HOLDING THE BLOWER
Before operating the unit, stand in the operating position and
check for the following:
The unit in the right hand and on the right side of the body. Do
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not block the air intake which will affect the unit's performance
(Fig. 11).
If the conditions are dusty, the operator is wearing a dust
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mask or face mask
The unit is in good working condition
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The tubes are in place and secure
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OPERATING TIPS
Using the Variable Speed Cruise Control
For longer periods of operation and to eliminate possible fi nger fatigue.
1. Move the variable speed cruise control toward the
FAST position to incrementally increase or maintain the unit's
engine speed (Fig. 12). When the variable speed cruise
control is pressed, the trigger will recede into the handle.
2. To decrease engine speed, move the variable speed cruise
control to the SLOW position and the trigger will return to idle
(Fig. 12).
Other Tips
Always use a fi rm grip when holding the unit.
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To reduce the risk of hearing loss, hearing protection is required.
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Operate power equipment only at reasonable hours
•
when people might not be disturbed. Comply with times listed in local ordinances. Usual
recommendations are 9:00 am to 5:00 pm, Monday through Saturday.
To reduce noise levels, operate the unit at the lowest possible speed to do the job.
•
Use rakes and brooms to loosen debris before blowing.
•
Watch for bystanders, open windows or cars; blow debris safely away.
•
Use the curved tube extension so the unit can work closer to the ground.
•
Clean up after using blowers and other equipment. Dispose of debris appropriately.
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MAINTENANCE AND REPAIR INSTRUCTIONS

MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the frequency stated in the table. These
procedures should also be a part of any seasonal tune-up.
NOTE: Some maintenance procedures may require special tools or skills. If you are unsure about
these procedures, take your unit to a Troy-Bilt or other qualifi ed service dealer.
NOTE: Maintenance, replacement, or repair of the emission control devices and system may be
performed by a Troy-Bilt or other qualifi ed service dealer.
NOTE: Please read the California/EPA statement that came with the unit for a complete listing of
terms and coverage for the emissions control devices, such as the spark arrestor, muffl er,
carburetor, etc.
FREQUENCY MAINTENANCE REQUIRED
Every 10 hours Clean and oil air fi lter
After 1st 10 Change oil
hours
Check rocker arm to valve clearance and adjust
Every 40 hours Change oil
Check rocker arm to valve clearance and adjust
Check spark plug condition and gap
CHECKING THE OIL LEVEL
The importance of checking and maintaining the proper oil level in
the crankcase cannot be overemphasized. Check oil before each
use:
1. Stop the engine and allow oil to drain into the crankcase.
2. Place the engine on a level surface.
3. Clean the area around the oil plug before removing it. Keep
dirt, grass clippings, and other debris out of the engine.
4. Remove the oil plug (Fig. 14).
5. Look into the oil fi ll hole (use a fl ashlight if needed). The oil
should be just touching the innermost thread (Fig. 13).
6. If the oil level is not touching the innermost thread on the oil fi ll
hole, add a small amount of oil to the oil fi ll hole and recheck
(Fig. 13). Repeat this procedure until the oil level reaches the
innermost thread on the oil fi ll hole.
NOTE: Do not overfi ll the unit.
NOTE: Make sure the O-ring is in place on the oil plug when
checking and changing the oil (Fig. 14).
CHANGING THE OIL
Change the oil while the engine is still warm. The oil will fl ow freely
and carry away more impurities.
1. Remove the oil fi ll plug.
2. Pour the oil out of the oil fi ll hole and into a container by
tipping the unit to a vertical position (Fig. 15). Allow ample
time for complete drainage.
3. Wipe up any oil residue on the unit and clean up any oil that
may have spilled. Dispose of the oil according to federal, state
and local regulations.
4. Refi ll the crankcase with 2.03 fl .oz. (60 ml) of SAE 30 SF, SG,
SH oil (Fig. 17).
NOTE: Use the bottle and spout saved from initial use to
measure the correct amount of oil. The fi ll line on the
bottle's label measures approximately 2.03 fl .oz. (60 ml)
(Fig. 16).
5. Check the level. See Checking the Oil Level.
6. Once full, replace the oil plug.
4
AIR FILTER MAINTENANCE
Cleaning the Air Filter
Failure to maintain the air fi lter will VOID the warranty.
1. To open the air fi lter cover, push the tab on the left side of the
2. Remove the air fi lter (Fig. 18).
3. Wash the fi lter in detergent and water. Making sure to rinse the
4. Lightly coat the fi lter with clean SAE 30 motor oil.
5. Squeeze the fi lter to spread and remove excess oil.
6. Replace the fi lter.
NOTE:
7. To reinstall the air fi lter cover, position the hooks on the right
8. Swing the cover to the left and press closed so the air fi lter cover tab snaps into the slot on the
IDLE SPEED ADJUSTMENT
The idle speed of the engine is adjustable. An idle adjustment screw is between the air fi lter cover and
the engine starter housing (Fig. 19).
Fig. 11
NOTE:
If, after checking the fuel and cleaning the air fi lter, the engine still will not idle, adjust the idle speed
screw as follows:
1. Start the engine and warm up according to the Starting/
Cruise
2. Release the trigger and let the engine idle. If the engine stops,
Control
SLOW
FAST
Checking the fuel, cleaning the air fi lter, and adjusting the idle
speed should solve most engine problems. If not and all of the
following are true:
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Fig. 12
•
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take the unit to a qualifi ed service dealer.
ROCKER ARM CLEARANCE
This requires disassembly of the engine. If you feel unsure or
unqualifi ed to perform this, take the unit to a qualifi ed service
dealer.
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•
1. Remove the 8 engine cover screws with the appropriate tool
NOTE:
2. Disconnect the spark plug wire.
3. Clean dirt from around the spark plug and rocker arm cover.
4. Remove the screw holding the rocker arm cover with the
SEE
5. Turn the fl ywheel slowly to bring the piston to the top of its
p. 4
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p. 4
p. 4
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p. 4
If these statements are not true, repeat this step.
p. 4
6. Slide the feeler gauge between the rocker arm and the valve
p. 4
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 (Fig. 22.)
Oil Fill Line
7. If the clearance is not within specifi cation:
a. Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver (Fig. 22).
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Fig. 13
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b. Recheck both clearances, and adjust as necessary.
Oil Plug
8. Reinstall the rocker arm cover using a new gasket (Fig. 21). Torque the screw to: 20–30 in•lb
O-Ring
9. Check the spark plug and reinstall. See Replacing the Spark Plug.
10. Reinstall the spark plug wire.
11. Reinstall the engine cover. Check alignment of the cover before tightening the screws. Tighten
Oil Fill Hole
NOTE:
REPLACING THE SPARK PLUG
Fig. 14
Use a replacement part number 753-05784 or Champion® spark
plug #RDZ4H. The correct spark gap is 0.025 in. (0.635 mm).
1. Stop the engine and allow it to cool.
2. Open the spark plug cover (Fig. 23).
3. Grasp the plug wire fi rmly and pull the cap from the spark plug.
4. Clean dirt from around the spark plug. Remove the spark
Fig. 15
5. Replace cracked, fouled or dirty spark plug. Set the spark gap
6. Install a correctly-gapped spark plug in the cylinder head. Turn
Fill Level 7. Reinstall the spark plug cover.
If using a torque wrench, torque to:
110-120 in.•lb. (12.3-13.5 N•m)
Fig. 16
Do not over tighten.
MAINTENANCE AND REPAIR INSTRUCTIONS
WARNING:
To avoid serious personal injury,
always turn the unit off and allow it to cool before
cleaning or maintaining it.
cover inward and pull the air fi lter cover slightly out and to the
right (Fig. 18).
fi lter thoroughly and allow it to dry.
Operating the unit without the air fi lter will VOID the
warranty.
side of the air fi lter cover into the slots at the right side of the
back plate (Fig. 18).
back plate (Fig. 18).
Careless adjustments can seriously damage to the unit. A qualifi ed service dealer should
make carburetor adjustments.
Stopping Instructions.
insert a small Phillips screwdriver in between the air fi lter cover
and the engine cover (Fig. 19). Turn the idle speed screw 1/8
of a turn clockwise at a time until the engine idles smoothly.
the engine will not idle
the engine hesitates or stalls on acceleration
there is a loss of engine power
WARNING:
To avoid serious personal injury, always turn the unit off and allow it to cool
before cleaning or maintaining it.
The engine must be cold when checking or adjusting the
rocker arm clearance.
This task should be performed inside, in a clean, dust free
area.
(Fig. 20), then remove the cover.
Make sure to store the screws so that they can be
reinstalled into their original holes.
Remove the spark plug from the cylinder by turning a 5/8 in.
socket counterclockwise.
appropriate tool (Fig. 21). Remove the rocker arm cover and
gasket.
travel (known as top dead center). Check that:
The piston is at the top of its travel by looking in the spark
plug hole (Fig. 21)
Both rocker arms move freely, and both valves are closed.
return spring. Measure the clearance between the valve stem
and rocker arm (Fig. 22). Measure both the intake and exhaust
valves.
To increase clearance, turn the adjusting nut counterclockwise.
To decrease clearance, turn the adjusting nut clockwise.
(2.2–3.4 N•m).
screws.
Make sure that the screws are reinstalled into their original holes (Fig. 20).
plug from the cylinder head by turning a 5/8 in. socket
counterclockwise.
WARNING:
Do not sand blast, scrape or clean spark plug electrodes. Grit in the engine
could damage the cylinder.
at 0.025 in. (0.635 mm) using a feeler gauge (Fig. 24).
the 5/8 in. socket clockwise until snug.
Fig. 17
Slot
Tab
Air Filter Air Filter Cover
Fig. 18
Idle Adjustment
Screw
Fig. 19
Screws
Screws
Fig. 20
Rocker
Arm
Cover
Screw
Spark
Plug
Hole
Fig. 21
Adjustment Nut Rocker Arm
0.003–0.006 in.
(0.076–0.152 mm)
Valve
Feeler Gauge
Stem
Fig. 22
Fig. 23
0.025 in.
(0.635 mm)
Fig. 24