Craftsman professional PYT9000 Manual Del Operador página 23

4. To properly sharpen the cutting blades, remove equal amounts
of metal from both ends of the blades along the cutting edges,
parallel to the trailing edge, at a 25°- 30° angle. Always grind each
cutting blade edge equally to maintain proper blade balance. See
Figure 18.
CAUTION
If the cutting edge of the blade has previously been sharpened, or if
any metal separation is present, replace the blades with new ones.
WARNINg
A poorly balanced blade will cause excessive vibration, may cause
damage to the tractor and/or result in personal injury.
5. Test the blade's balance using a blade balancer. Grind metal from
the heavy side until it balances evenly.
NOTE: When replacing the blade, be sure to install the blade with
the side of the blade marked ''Bottom'' (or with a part number
stamped in it) facing the ground when the mower is in the operat-
ing position.
CAUTION
Use a torque wrench to tighten the blade spindle hex flange nut to
between 70 ft-lbs and 90 ft-lbs.
bATTERY
WARNINg
Battery posts, terminals, and related accessories contain lead and
lead compounds, chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after handling.
CAUTION
If removing the battery, disconnect the NEGATIVE (Black) wire from
its terminal first, followed by the POSITIVE (Red) wire. When reinstall-
ing the battery, always connect the POSITIVE (Red) wire its terminal
first, followed by the NEGATIVE (Black) wire.
SERVICE AND MAINTENANCE
Figure 18
jump Starting
Never jump start a damaged or frozen battery. Be certain the vehicles
do not touch and ignitions are off. Do not allow cable clamps to touch.
1. Connect the positive (
discharged battery.
2. Connect the other end of the cable to the positive (
jumper battery.
3. Connect the negative (
jumper battery.
4. Make the final connection on the engine block of the tractor, away
from the battery. Attach to an unpainted part to assure a good
connection.
If the jumper battery is installed on a vehicle (i.e. car, truck), do NOT
start the vehicle's engine when jump starting your tractor.
5. Start the tractor (as instructed in the Operation section of this
manual).
6. Set the tractor's parking brake before removing the jumper cables.
Remove cables in reverse order of connection.
Charging
Batteries give off an explosive gas while charging. Charge the battery
in a well ventilated area and keep away from an open flame or pilot
light as on a water heater, space heater, furnace, clothes dryer or
other gas appliances.
When charging your tractor's battery, use only a charger designed for
12V lead-acid batteries. Read your battery charger's Owner's Manual
prior to charging your tractor's battery. Always follow its instructions
and heed its warnings.
If your tractor has not been put into use for an extended period of time,
charge the battery as follows:
1. Set your battery charger to deliver a max of 10 amperes.
2. If your battery charger is automatic, charge the battery until the
charger indicates that charging is complete. If the charger is not
automatic, charge for no fewer than eight hours.
23
WARNINg
) cable to positive ( ) post of your tractor's
+ +
+
) cable to the negative ( ) post of the
– –
CAUTION
WARNINg
CAUTION
) post of the