Snapper HZT21481BV Adjustments & Repair, Traction Belt Tension, 5.4TRACTION BELT REPLACEMENT

Section 5 - ADJUSTMENTS & REPAIR

! WARNING !

DO NOT attempt any maintenance, adjustments or service with engine running. STOP engine. STOP blades. Set brake. Remove key. Remove spark plug wires and secure away from spark plugs. Engine and components are HOT. Avoid serious burns; allow suf- ficient time for all parts to cool.

5.3 TRACTION BELT TENSION

The traction drive belt tension does not require adjustment. If the belt is slipping, it will have to be replaced.

5.4TRACTION BELT REPLACEMENT

1.Remove mower drive belt from around clutch pul- ley. See Figure 5.10. Refer to Section "MOWER DRIVE BELT REPLACEMENT AND ADJUSTMENT".

2.Turn lock nut out to the end of eyebolt, reducing spring tension. Unhook traction idler spring from bolt in frame. See Figure 5.10.

3.Remove anti-rotation bracket. See Figure 5.10.

4.Disconnect the electric clutch from main wire har- ness.

5.Remove traction belt from around engine pulley and hydro pumps.

6.Install new belt and route around engine pulley and hydro pump pulleys.

7.Reconnect electric clutch to main wire harness.

8.Reinstall anti-rotation bracket and tighten nuts securely.

9.Reattach traction idler spring. Run lock nut all the way to the end of the threads on the eyebolt. See Figure 5.10.

10.Reinstall mower drive belt onto clutch pulley. Refer to Section "MOWER DRIVE BELT REPLACE-

MENT AND ADJUSTMENT".

UNHOOK TRACTION	REMOVE ANTI-ROTATION
DRIVE IDLER SPRING	BRACKET

EYEBOLT

LOOSEN

LOCK NUT

REMOVE MOWER DRIVE BELT

FROM AROUND CLUTCH PULLEY

FIGURE 5.10

5.5BLADE BRAKE/ELECTRIC CLUTCH ADJUSTMENT The blade switch engages the electric clutch when pulled out to the "ON" position. When the blade switch is in the "ON" position the cutting blade(s) are engaged. The blade switch disengages the electric clutch when the blade switch is pushed in to the "OFF" position. When the blade switch is in the "OFF" posi- tion the cutting blade(s) are disengaged. The electric clutch is adjustable. The blades should stop rotation in 5 seconds or less. If the electric clutch fails to stop the blades rotation in 5 seconds, adjustment is necessary.

1.Insert a feeler gauge into the three slots on the electric clutch.

2.Check gap through all three slots in the side of the clutch. The gap should be set at .015.

3.If gap is incorrect rotate nuts in or out to achieve the correct gap. See Figure 5.11.

NOTE: Electric Clutch is shown removed from the machine. Removal is not necessary for adjustment.

INSERT FEELER GAUGE.

GAP SHOULD BE .015

ROTATE NUTS IN OR

OUT TO ACHIEVE

CORRECT GAP

FIGURE 5.11

5.6TRACKING ADJUSTMENT

If the machine does not track straight when the Motion Control Levers are in the maximum forward speed position, perform the following adjustment. Rear tire pressure must be set to 12 PSI before making this adjustment.

1.Loosen bolts that secure adjustment plates and slide plates all the way forward. Retighten bolts. See Figure 5.12.

2.Start machine and drive in smooth flat open area at maximum forward speed.

3.If machine tracks to the right, loosen bolts that secure the left adjustment plate. Move plate rearward to slow the left wheel. Retighten bolts.

4.If machine tracks to the left, loosen bolts that secure the right adjustment plate. Move plate rearward to slow the right wheel down. Retighten bolts. See Figure 5.12.

5.Drive machine again. Repeat adjustment as neces- sary until machine tracks straight.

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