Husqvarna YTH18542 Owner's Manual page 16

MAINTENANCE
TRACTOR
Always observe safety rules when performing any main-
tenance,
BRAKE OPERATION
If tractor requires more than five (5) feet to stop at highest
speed in highest gear on a level, dry concrete or paved
surface, then brake must be checked and adjusted, (See
"TO ADJUST BRAKE" in the Service and Adjustments
section of this manual),
TIRES
• Maintain proper air pressure in all tires (See"PRODUCT
SPECIFICATIONS" section of this manual),
• Keep tires free of gasoline, oil, or insect control chemi-
cals which can harm rubber.
• Avoid stumps, stones, deep ruts, sharp objects and
other hazards that may cause tire damage,
NOTE: To seal tire punctures and prevent flat tires due to
slow leaks, tire sealant may be purchased from your local
parts dealer, Tire sealant also prevents tire dry rot and
corrosion.
OPERATOR PRESENCE SYSTEM AND REVERSE OP-
ERATION SYSTEM (ROS)
Be sure operator presence and reverse operation systems
are working properly. If your tractor does not function as
described, repair the problem immediately.
• The engine should not start unless the brake pedal is
fully depressed, and the attachment clutch control is
in the disengaged position.
CHECK OPERATOR PRESENCE SYSTEM
• When the engine is running, any attempt by the operator
to leave the seat without first setting the parking brake
should shut off the engine,
• When the engine is running and the attachment clutch
is engaged, any attempt by the operator to leave the
seat should shut off the engine,
• The attachment clutch should never operate unless
the operator is in the seat,
CHECK REVERSE OPERATION (ROS) SYSTEM
• When the engine is running with the ignition switch in
the engine "ON" position and the attachment clutch
engaged, any attempt by the operator to shift into
reverse should shut off the engine,
• When the engine is running with the ignition switch in
the ROS "ON" position and the attachment clutch en-
gaged, any attempt by the operator to shift into reverse
should NOT shut off the engine,
ROS "ON" POSITION
ENGINE "ON" POSITION
(NORMAL OPERATING)
BLADE CARE
For best results mower blades must be kept sharp. Replace
bent or damaged blades,
CAUTION: Useonlya replacement blade
approved by the manufacturer of your
tractor. Using a blade not approved
by the manufacturer of your tractor is
hazardous, could damage your tractor
and void your warranty.
BLADE REMOVAL (See Fig. 10)
• Raise mower to highest position to allow access to
blades.
• Remove blade bolt, lock washer and flat washer securing
blade.
• Install new or resharpened blade with trailing edge up
towards deck as shown.
IMPORTANT: TO ENSURE PROPER ASSEMBLY, CENTER
HOLE IN BLADE MUST ALIGN WITH STAR ON MANDREL
ASSEMBLY.
• Reassemble blade bolt, lock washer and flat washer
in exact order as shown.
• Tighten blade bolt securely (27-35 Ft. Lbs. torque).
IMPORTANT: BLADE BOLT IS HEATTREATED.IF BOLT NEEDS
REPLACING, REPLACE ONLYWITH APPROVE BOLT SHOWN
IN THE REPAIR PARTS.
TRAILING EDGE UP
=DE
CENTER
HOLE
STAR
FLAT
WASHER
LOCK
WASHER_
(_..._ BLADE BOLT
FIG. 10
MANDREL
ASSEMBLY
TO SHARPEN BLADE (See Fig. 11)
NOTE: We do not recommend sharpening blade - but if
you do, be sure the blade is balanced,
Care should be taken to keep the blade balanced. An un-
balanced blade will cause excessive vibration and eventual
damage to mower and engine,
• The blade can be sharpened with a file or on a grind-
ing wheel, Do not attempt to sharpen while on the
mowe r,
• To check blade balance, you will need a 5/8" diameter
steel bolt, pin, or a cone balancer. (When using a
cone balancer, follow the instructions supplied with
balancer),
NOTE: Do not use a nail for balancing blade. The lobes of
the center hole may appear to be centered, but are not,
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