Scag Power Equipment STT-28CAT manual Tires, Blade Sharpening, Blade Replacement

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Section 7

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. See Figure 7-6.

1.Sharpen the cutting edge at the same bevel as the original. See Figure 7-6. Sharpen only the top of the cutting edge to maintain sharpness.

Angle Blade Back

Do Not Cut In

	X Must NOT Exceed
30	1/3 Blade Width
	SGB033

Figure 7-6. 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.

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 7-7)

- 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.

HEx NUT-TORqUE

TO 75 LB-FT

SPINDLE	CUTTER
SHAFT
	DECk

HEx HEAD

BOLT / NUT

SPINDLE

ASSEMBLY

CUTTER BLADE

SPACER

CUTTER

BLADE

WASHER HEx HEAD BOLT 390S0160

Figure 7-7. Blade Replacement

- 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 7-7)

7.10 TIRES

Check the tire pressures after every 8 hours of operation or daily.

Caster Wheels	Flat Free
Drive Wheels	12 PSI

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