Maintenance - Black Box BM21HWAS Operator's Manual

Normal maintenance, replacement or repair of emission con-
trol devices and systems may be performed by any qualified
repair establishment or individual with original or equivalent
parts. Warranty and recall repairs must be performed by an
authorized service center; please contact customer service
for assistance.
WARNING:
Before inspecting, cleaning, or servicing the machine,
shut off engine, wait for all moving parts to stop, and
disconnect spark plug wire and move it away from spark
plug. Failure to follow these instructions can result in
serious personal injury or property damage.
WARNING:
Always wear eye protection with side shields marked to
comply with ANSI Z87.1, along with hearing protection.
Failure to do so could result in objects being thrown into
your eyes and other possible serious injuries.
WARNING:
When servicing, use only qualified replacement parts.
Use of any other parts can create a hazard or cause
product damage.
NOTICE:
Periodically inspect the entire product for damaged,
missing, or loose parts such as screws, nuts, bolts, caps,
etc. Tighten securely all fasteners and caps and do not
operate this product until all missing or damaged parts
are replaced. Please contact customer service or a quali-
fied service center for assistance.
GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use. Use
clean cloths to remove dirt, dust, oil, grease, etc.
WARNING:
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating oils, etc., come in contact
with plastic parts. Chemicals can damage, weaken, or
destroy plastic which can result in serious personal injury.
Remove any build-up of grass and leaves on or around the
engine cover. Wipe the mower clean with a dry cloth oc-
casionally. Do not use water.

MAINTENANCE

LUBRICATION
All of the bearings in this product are lubricated with a suf-
ficient amount of high grade lubricant for the life of the unit
under normal operating conditions. Therefore, no further
bearing lubrication is required.
REPLACING THE CUTTING BLADE
See Figures 14 - 15.
NOTE: Only use manufacturer's recommended or equivalent
replacement blades.
Always protect hands by wearing heavy gloves and/or
wrapping the cutting edges of the blade with rags and
other material when performing blade maintenance. Con-
tact with the blade could result in serious personal injury.
 Stop the engine and allow blade to come to a complete
stop.
 Disconnect the spark plug wire.
 Raise the mower 90° to rest on its rear support.
 Wedge a block of wood between the blade and mower
deck to prevent the blade from turning.
 Loosen the blade bolt by turning it counterclockwise (as
viewed from bottom of mower) using a 9/16 in. wrench
or socket (not provided).
 Remove the blade bolt, flat washer, and blade.
 Place the new blade on the shaft. Ensure blade is properly
seated with shaft going through center blade hole and
the two blade posts inserted into their respective holes
on the blade. Make sure the blade is installed with the
curved ends pointing up toward the mower deck and not
down toward the ground.
 Replace the flat washer and blade bolt. Finger tighten the
bolt.
NOTE: Make certain all parts are replaced in the exact
order in which they were removed.
 Torque the blade bolt down clockwise using a torque
wrench (not provided) to ensure the bolt is properly
tightened. The recommended torque for the blade bolt
is 35-40 ft. lbs.
Ensure blade is properly seated and the blade bolt is
tightened to the torque specifications above. Failure to
properly attach the blade could cause it to come loose
and result in possible serious personal injury.
Page 12 — English
WARNING:
WARNING: