Jacobsen Bunton 630024, Setup, Parts & Maintenance

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13
Gear
Drive
Midsize
MAINTENANCE
Blade Sharpening
Blades may be sharpened by filing or grinding, but with either method the balance of the blades must be
maintained at 5/8 oz/in or less. Failure to maintain balance causes excess vibration, wear and shortened life
of not only the blades, but most all components of the machine. To balance a blade after sharpening: attach
1/8 oz of weight 5" from center on the light end. This should make the light end the heavy end. If it does not:
File or grind the heavy end until the addition of weight makes the light end the heavy end.
Cutterdeck Pulley Assembly
SPARK PLUG
Remove plug and check condition.
Good operating conditions are indicated if the plug has a light grey or tan deposit. A white blistered
coating may indicate overheating. A black coating usually means an “over rich” fuel mixture caused by a
clogged air cleaner or improper carburetor adjustment. Do not sandblast, wire brush or otherwise try to
clean a dirty plug. Best results are obtained with a new plug.
See engine manufacturers manual for proper spark plug gap.
NOTE:
Do not overheat or weaken the blades.
Do not straighten bent blades. Replace with new
Bunton blades.
If lift portion of blade is worn thin replace with a
new Bunton blade.
Replace cracked or bent blades.
ALWAYS replace with Bunton blades—do not
use another manufacturer’s blades as this could
be dangerous.
BLADE REMOVAL
NOTE: To prevent blade from turning, place
block of wood at A, with grain perpendicular to
blade. Follow these instructions to prevent injury
when bolt releases.
1. Use a box wrench or socket with a long breaker
bar to remove spindle bolt under cutterdeck.
2. Slip tube over breaker bar or wrench if
necessary to gain leverage.
3. Keep hands clear as blades may rotate when
bolt releases.
4. When changing blades, wear thickly padded
gloves.
5. Block blades from turning by using a piece of
wood.
BLADE RE-INSTALLATION
1.
Place the desired number of spacers (no more than 2) on the spindle bolt below the cutterdeck between
the blade and spindle shaft.
2. Insert the cutter spindle bolt (from bottom) complete with washer, blade and spacers.
3. Place remaining spacer(s) on the spindle bolt above the cutterdeck between the conical washer and nut
(as shown). Replace nut and tighten to 70 ft-lbs.