Troy-Bilt 604 manual Cutting Blades, Hole, Front of Tractor

•Remove the two hex bolts (from both sides of the tractor) that affix the PTO actuator bracket to the tractor frame. See Figure 19.

Hex Bolts

PTO Actuator	Deck Stop
Bracket

Figure 19

•Carefully lower the PTO actuator bracket and the engine pulley as an assembly while removing the drive belt from the upper portion of the engine pulley.

•Remove the drive belt by feeding it from both ends toward the front idler pulley on the double-idler bracket. See Figure 16.

•Reassemble by following the above steps in reverse order.

•Reroute the new belt around the pulleys and belt keepers EXACTLY as the old one was routed. Refer to Figure 16.

The AutoDrive™ pedal is properly adjusted when the hole found in the double-idler bracket has approximately 1-3/8" of travel with ten pounds of pressure applied to the AutoDrive™ pedal. See Figure 20.

Double-idler

Bracket

Hole	Idler
	Adj. Rod

Front of Tractor

NOTE: View shown from above tractor.

Figure 20

Adjust the AutoDrive™ pedal after replacing the drive belts on your tractor, if necessary, as follows:

•Locate the speed control assembly on the underside of the steering support bracket. See Figure 21.

Idler	Place Wrenches Here
Adj. Rod

Neutral

Return

Bracket

Pin

Hairpin

Clips

AutoDrive™ Pedal	Speed Control
Return Spring	Assembly

Figure 21

•Remove both hairpin clips from the pin which is fastened to the speed control assembly (be careful not to lose the small flat washers found on the pin). See Figure 21.

•Remove the AutoDrive™ pedal return spring.

•Using two 9/16" wrenches, remove the pin

from the speed control assembly. See Figure 21.

Thread the idler adjustment rod inward or outward to lengthen or shorten the travel of the double-idler bracket until proper adjustment is achieved.

•Reassemble by following the above steps in reverse order.

IMPORTANT: After replacing the drive belts, perform the PTO adjustment as instructed in the ADJUSTMENTS section of this manual prior to operating the tractor.

CUTTING BLADES

WARNING: Cutting blades are sharp. Always protect hands by wearing heavy leather work gloves to grasp blades.

The blades may be removed for sharpening or replacement as follows.

•Remove the deck from beneath the tractor, (refer to DECK REMOVAL earlier in this section for detailed instructions) then gently flip the deck over to expose its underside.

•Place a block of wood between the center deck housing baffle and the cutting blade to act as a stabilizer. See Figure 22.

•Use a 15/16" wrench to remove the hex flange nut that secures the blade to the spindle assembly. See Figure 22.

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