Maintaining Your Riding Mower - Yard-Man 320 Series Operator's Manual

Using a 9/16" socket, remove bolt, spacer and the
flat washer from the variable speed pulley. See
Figure 17.
Variable Speed Pulley
Spring
Spring Loaded
Idler
• Drop the pulley down and remove the belt.
• Replace new belt and reassemble.
• Make sure that the belt is routed inside of belt
keeper, and the belt keeper is reassembled in the
same location from where it was removed.
Upper Variable SpeedBelt
• Remove the engine pulley using a 5/8" socket
wrench with a 6" extension. The engine pulley is
located in front of the transmission.
• Drop the engine pulley down and remove the belt
from around it.
• Push the idler bracket to the right and remove the
belt. See Figure 17.
• Replace belt and reassemble.
Transmission
Pulley
Engine Pulley
Figure 17
SECTION 8: MAINTAINING YOUR RIDING MOWER
GeneralRecommendations
• Always observe safety rules when performing any
maintenance.
• The warranty on this riding mower does not cover
items that have been subjected to operator abuse
or negligence. To receive full value from the
warranty, operator must maintain the riding mower
as instructed in this manual.
• We do not recommend the use of pressure
washers or garden hose to clean your unit. These
may cause damage to electrical components,
spindles, pulleys, bearings or the engine. The use
of water may shorten life of your riding mower and
reduce its serviceability.
,_ WARNING:
Always stop engine and
disconnect spark plug wire before any
maintenance or adjustments.
Cutting Blade
,i_ WARNING:
Protect your hands by wearing
heavy gloves or using a rag to grasp the cutting
blade. Avoid personal injury.
Removal
• Remove the 5/8" hex flange nut which holds the
blade to the blade spindle.
Remove blade from the spindle. See Figure 18.
De
Spindle
Blade
Figure 18
Sharpening
• When sharpening the blade, follow the original
angle of grind as a guide. It is extremely important
that each cutting edge receives an equal amount of
grinding to prevent an unbalanced blade. An
unbalanced blade will cause excessive vibration
when rotating at high speeds, may cause damage
to the mower and/or cause personal injury.
17