Snapper SZT18386BVE Motion Control Adjustments, Neutral Adjustments, Tracking Adjustments

Section 4 - ADJUSTMENTS & REPAIR

WARNING

DO NOT attempt any adjustments, maintenance, service or repairs with the engine running. Stop engine. Stop blade. Engage parking brake. Remove key. Remove spark plug wire from spark plug and secure away from plug. Engine and components are HOT. Avoid serious burns, allow all parts to cool before working on machine. Fuel Filler Cap and Vent must be closed securely to prevent fuel spillage.

4.1 MOTION CONTROL ADJUSTMENTS

4.1.1.Neutral Adjustments

When the machine is on a flat level surface and motion control levers are in their neutral or neutral lock positions, there should be no machine movement. If movement is present, adjustment must be made to left and/or right transmission control rods (located to the left and right of the operator seat, under the control panels):

1.Remove the hair pin and washer securing the rod fitting to the Motion Control Lever pivot bracket. See Figure 4.1. Pull fitting end out from bracket.

2.Turn fitting clockwise one turn if machine moves in reverse, or counterclockwise if machine moves forward.

3.Replace fitting into hole, securing with washer and hair pin.

4.Start the machine. With motion control levers left in their neutral lock positions, disengage the parking brake and check for movement. If movement is still present, repeat steps 1-4 until movement ceases.

5.Repeat for other side if needed.

PIVOT BRACKET (LEVER

MUST BE IN NEUTRAL

LOCK POSITION)

	HAIR PIN
		ROD
		FITTING
TURN CLOCKWISE IF WHEEL
		CONTROL
TURNS IN REVERSE,
COUNTERCLOCKWISE IF		ROD
WHEEL TURNS FORWARD

FIGURE 4.1

(Right side shown; fuel tank removed for clarity)

4.1.2.Neutral Return Spring Adjustments

When the motion control levers are released, return springs assist them back to the neutral position. See Figure 4.1a. To adjust spring tension:

1.If a stronger return is desired, tighten the nyloc nut atop the return spring rod.

2.If a weaker return is desired, loosen the nyloc nut atop the return spring rod.

NOTE: Be sure to adjust left and	return
springs equally.

TENSION

ADJUSTING

NUT

NEUTRAL

RETURN

SPRINGS

FIGURE 4.1a

4.1.4.Motion Control Lever Alignment

Correctly aligned Motion control levers will propel the mower forward in a straight line when levers are equally engaged into drive. See Figure 4.1b. If one transmission engages before another, loosen the lever adjustment screws, and adjust the lever forward or backward until levers are aligned. See Figure 4.1c.

FIGURE 4.1b

=

=

4.1.3.Tracking Adjustments

When both motion control levers are fully engaged in forward drive, the machine should move in a straight line. If the machine tracks (veers) left or right, a tracking adjustment must be made. Each motion control lever is equipped with a tracking adjustment plate. See Figure 4.1b. Moving the plate forward or backward adjusts the machine’s tracking:

1.If mower tracks to the left, loosen the two torx screws on the left adjustment plate, slide plate forward approximately 1/8”, and retighten screws. (If plate is already as far forward as it can go, loosen the right plate and slide back 1/8”.) Check machine tracking and repeat as needed.

2.If mower tracks to the right, loosen the two torx screws on the right adjustment plate, slide plate forward approximately 1/8”, and retighten screws. (If plate is already as far forward as it can go, loosen the left plate and slide back 1/8”.) Check machine tracking and repeat as needed.

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