Scag Power Equipment STT-31BSG - Manual (Page 36)

Section 7
31
Figure 7-9 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
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.
3. Secure the cutter blades to prevent them from
rotating, (Use the optional Blade Buddy tool, P/N
9212, to assist in securing the cutter blades), remove
the nut from the blade attaching bolt. Remove the
cutter blade, bolt and spacer from the spindle shaft.
(Figure 7-10).
-NOTE-
The front of the machine will have to be raised
slightly to remove the blade bolt from the cutter
spindle.
4. To install the new cutter blade, put the flat washer
onto the blade bolt and slide the bolt into the hole in
the cutter blade.
Figure 7-10 Blade Replacement
390S0139
ANGLE BLADE BACK
DO NOT CUT IN
X MUST NOT EXCEED
1/3 BLADE WIDTH
X
30
WARNING:
Always wear proper hand and eye protection
when working with cutter blades.
-NOTE-
Be sure that the blade is installed with the lift
wing toward the top.
5. Install the spacer onto the blade bolt and insert the
bolt into the cutter spindle shaft.
6. Install the hex nut to the blade bolt at the top of the
cutter spindle. Secure the blades from rotating and
torque to 75 ft-lbs. (See Figure 7-10)
7.10 TIRES
Check the tire pressures after every 8 hours of operation
or daily.
Caster Wheels ........................................ 25 PSI
Drive Wheels ......................................... 12 PSI
390S0160
CUTTER
DECK
HEX NUT-TORQUE
TO 75 LB-FT
SPINDLE
SHAFT
SPINDLE
ASSEMBLY
WASHER HEX HEAD BOLT
CUTTER
BLADE
HEX HEAD
BOLT / NUT
CUTTER BLADE
SPACER