Scag Power Equipment STT-31BSG - Manual (Page 35)

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Section 7
WARNING:
BATTERIES PRODUCE EXPLOSIVE GASES.
Charge the battery in a well ventilated space
so gases produced while charging can
dissipate.
Charging rates between 3 and 50 amperes are satisfactory
if excessive gassing or spewing of electrolyte does not
occur or the battery does not feel excessively hot (over
125°F). If spewing or gassing occurs or the temperature
exceeds 125°F, the charging rate must be reduced or
temporarily stopped to permit cooling.
C. Jump Starting
1. The booster battery must be a 12 volt type. If a
vehicle is used for jump starting, it must have a
negative ground system.
2. When connecting the jumper cables, connect the
positive cable to the positive battery post, then
connect the negative cable to the negative battery
post.
WARNING:
Always wear proper hand and eye protection
when working with cutter blades.
7.8 DRIVE BELTS
All drive belts are spring loaded and self-tensioning,
however after the first 2, 4, 8 and 10 hours of operation,
the belts should be checked for proper alignment and
wear. Thereafter, check the belts after every 40 hours of
operation or weekly, whichever occurs first.
-NOTE-
If you experience frequent belt wear or breakage,
see your authorized Scag service center for belt
adjustment.
7.9 CUTTER BLADES
A. Blade Inspection
1. Remove the ignition key before servicing the blades.
2. Raise the mower deck to the highest position. Place
the lanyard pin in the highest cutting height positon to
prevent the cutter deck from falling.
WARNING:
4. If a blade cutting edge is dull or nicked, it should be
sharpened. Remove the blades for sharpening. See
"Blade Replacement."
-NOTE-
Keep the blades sharp. Cutting with dull
blades not only yields a poor mowing job,
but slows the cutting speed of the mower
and causes extra wear on the engine and
the blade drive by pulling hard.
Do not attempt to straighten a bent blade, and
never weld a broken or cracked blade. Always
replace it with a new blade to assure safety.
B. Blade Sharpening
-NOTE-
If possible, use a file to sharpen the blade.
Using a wheel grinder may burn the blade.
-NOTE-
DO NOT sharpen the blades beyond 1/3 of the
width of the blade.
1. Sharpen the cutting edge at the same bevel as the
original. See Figure 7-9. Sharpen only the top of the
cutting edge to maintain sharpness.
3. Check the cutter blades for straightness. If the cutter
blades appear bent, they will need to be replaced.