Drive Belts; Cutter Blades - Scag Power Equipment STT52A-27CH Operator's Manual

Section 7

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.

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:
Always wear proper hand and eye protection
when working with cutter blades.
3. Check the cutter blades for straightness. If the
cutter blades appear bent, they will need to be
replaced.
WARNING:
Do not attempt to straighten a bent blade, and
never weld a broken or cracked blade. Always
replace it with an original Scag cutter blade to
assure safety.
4. If a blade cutting edge is dull or nicked, it should be
sharpened. Remove the blades for sharpening. See
"Blade Replacement."
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.
-NOTE-
B. Blade Sharpening
If possible, use a file to sharpen the blade.
Using a wheel grinder may burn the blade.
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 7-7. Sharpen only the top of the
cutting edge to maintain sharpness.
Do Not Cut In
30
Figure 7-7 Blade Sharpening
2. Check the balance of the blade. If the blades are out
of balance, vibration and premature wear can occur.
See your authorized Scag dealer for blade balancing
or special tools, if you choose to balance your own
blades.
C. Blade Replacement
WARNING:
Always wear proper hand and eye protection
when working with cutter blades.
1. Remove the ignition key before replacing 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.
35
-NOTE-
-NOTE-
Angle Blade Back
X Must NOT Exceed
1/3 Blade Width
SGB033