Cleaning And Storage - Cub Cadet BC5090 Manual De Operación

MAINTENANCE AND REPAIR INSTRUCTIONS
CHECKING THE OIL LEVEL
WARNING:
To prevent extensive engine wear and damage to the unit, always maintain the proper oil
level in the crankcase. Never operate the unit with a low 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 flat, level surface with the
cutting head shield hanging off a work bench or
table to get a proper oil level reading (Fig. 35).
3. Keep dirt, grass clippings and other debris out
of the engine. Clean the area around the
dipstick before removing it.
4. Remove the oil fill plug.
5. Look into the oil fill hole, use a flashlight if needed. The oil should be just touching
the inner most thread (Fig. 36).
6. If the oil level is not touching the inner most thread on the oil fill hole, add a small
amount of oil to the oil fill hole and recheck (Fig. 37). Repeat this procedure until
the oil level reaches the inner most thread on the oil fill hole.
NOTE: Do not overfill the unit.
NOTE: Make sure the O-ring is in place on the oil fill plug when checking and
changing the oil (Fig. 37).
CHANGING THE OIL
CAUTION:
Wear gloves to prevent injury when handling the unit.
Change the oil while the engine is still warm. The oil will flow freely and carry away
more impurities.
1. Remove the oil fill plug.
2. Pour the oil out of the oil fill hole and into a container by tipping the unit to a
vertical position (Fig. 38). 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. Refill the crankcase with 3.04 fluid ounce (90 ml) of SAE 30 SF, SG, SH oil. (Fig. 39)
NOTE: Use the bottle and spout saved from initial use to measure the correct
amount of oil. The top of the label on
the bottle measures approximately 3.04
ounces (90 ml) (Fig. 40). Check the
level. See Checking the Oil Level. If the
level is low, add a small amount of oil
and recheck. Do not overfill (Fig. 39).
5. Replace the oil fill plug.
AIR FILTER MAINTENANCE
Cleaning the Air Filter
Failure to maintain your air filter properly can result
in poor performance or can cause permanent damage to your engine.
1. Open the air filter cover. Push the tab on the under side of the cover inward. Then
pull the air filter cover out and up. (Fig. 41).
2. Remove the air filter (Fig. 41).
3. Wash the filter in detergent and water. Rinse the filter thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly coat the filter.
5. Squeeze the filter to spread and remove excess oil.
6. Replace the filter (Fig. 42).
NOTE: If the unit is operated without the air filter, you will VOID the warranty.
7. Reinstall the air filter cover. Position the slots on the top of the air filter cover onto
the tabs at the top of the back plate (Fig. 42).
8. Swing the cover down until the tab on the air filter backplate snaps into place in
the slot on the air filter cover (Fig. 41).
IDLE SPEED ADJUSTMENT
WARNING:
The cutting attachment may spin during idle speed
adjustments. Wear protective clothing and observe all safety
instructions to prevent serious personal injury.
The idle speed of the engine is adjustable. An idle adjustment screw is between the
air filter cover and the engine starter housing (Fig. 43).
NOTE: Careless adjustments can seriously damage your unit. An authorized
service dealer should make carburetor adjustments.
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.
2. 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.
43). 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.
3. 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), to reduce idle speed.
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 an authorized service dealer.
ROCKER ARM CLEARANCE
This service requires disassembly of the engine. If
feeling unsure or unqualified to perform this service,
take the unit to an authorized service center.
• The engine must be cold when checking or
adjusting the valve clearance.
• This task should be performed inside, in a clean,
dust free area.
1. Remove the six (6) screws on the back of the
engine cover with a Flat-head or T-25 Torx
screwdriver (Fig. 44).
2. Disconnect the spark plug wire.
3. Clean dirt from around the spark plug. Remove
the spark plug from the cylinder head by
turning a 5/8 in. socket counterclockwise.
4. Remove the engine cover (Fig. 44).
5. 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. 45). Remove the rocker arm cover
and gasket.
6. 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. 45).
• 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. 46). 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 46 and 47.
8. If the clearance is not within specification:
a. Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver (Fig. 46).
• To increase clearance, turn the adjusting nut counterclockwise.
• To decrease clearance, turn the adjusting nut clockwise.
b. Recheck both clearances and adjust as necessary.
9. 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.
Max Oil Fill Line
Fig. 35
Oil Fill
Plug
O-Ring
Oil Fill
Hole
Fill Line
Fig. 39
Back Plate
Air
Filter
Idle Adjustment Screw
View Of The Rear Engine Cover
Rocker Arm
Cover
Screws Screws
Spark
Plug Hole
Fig. 44
Adjustment
Nuts
Rocker Intake
Arms
Exhaust
Fig. 46
REPLACING THE SPARK PLUG
Use a replacement part number 753-05255 or Champion
mm).
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. 44).
2. Grasp the plug wire firmly and pull the cap from the spark plug.
3. Clean dirt from around the spark plug. Remove the spark plug from the cylinder
WARNING: Do not sand blast, scrape or clean electrodes. Grit in the
engine could damage the cylinder.
head by turning a 5/8 in. socket counterclockwise.
4. Replace cracked, fouled or dirty spark plug. Set the air gap at 0.025 in. (0.635 mm.)
Fig. 36
using a feeler gauge (Fig. 48).
5. 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.
CLEANING
WARNING:
cleaning or servicing it.
Fig. 37
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.
Short Term Storage (1-2 weeks)
1. Store the unit in a horizontal position. If this is not possible, store the unit vertically with the engine at the top.
Long Term Storage
1. Drain all gasoline from the gas tank into a container. Do not use gas that has been stored for more than 30 days.
Fig. 38
Dispose of the old gasoline in accordance with federal, state and local regulations.
2. Start the engine and allow it to run until it stalls. This ensures that all gasoline has been drained from the carburetor.
3. 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.
4. Change the oil, referring to Changing the Oil. Dispose of the old oil in accordance with federal, state and local
regulations.
5. Thoroughly clean the unit and inspect for any loose or damaged parts. Repair or replace damaged parts and
Fig. 40 tighten loose screws, nuts or bolts. The unit is ready for storage.
Air Filter
Cover
Air
Filter
Tab
Fig. 41
Tabs
Locking Tab
Fig. 42
Fig. 43
Fig. 45
Valve Stem
Fig. 47
MAINTENANCE AND REPAIR INSTRUCTIONS
® #RDZ19H spark plug. The correct air gap is 0.025 in. (0.635
To avoid serious personal injury, always turn the unit off and allow it to cool before
0.025 in.
(0.635 mm.)
Fig. 48
5