Yard-Man AutoDrive 604 Operator's Manual download pdf (Page 22)

• Removethe two hex bolts (from both sides of

the tractor) that affix the PTO actuator bracket

to the tractor frame. See Figure 19.

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 shownfromabove 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

Return

Bracket

lips

AutoDdve- Pedal

Return Spring

Speed Control

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 belPs,

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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Yard-Man AutoDrive 604 Operator's Manual Page 22

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