Poulan 421028 owner manual Service and Adjustments, To Adjust Snow Thrower Height, Chute Deflector

SERVICE AND ADJUSTMENTS

WARNING: To avoid serious injury, before performing any service or adjustments:

1.Be sure throttle is in STOP position.

2.Remove safety ignition key.

3.Make sure the augers and all moving parts have completely stopped.

4.Remove safety ignition key and disconnect spark plug wire from spark plug. Place wire where it cannot contact plug.

SNOW THROWER

TO ADJUST SNOW THROWER HEIGHT

See “TO ADJUST SKID PLATES” and “SCRAPER BAR” in the Operation section of this manual.

CHUTE DEFLECTOR

The chute deflector, attached to the top of the discharge chute, is provided to direct discharging snow away from the operator. If the deflector becomes damaged, it should be replaced.

WARNING: To avoid serious injury, never operate your snow thrower with the deflector removed or damaged.

•To change direction and/or distance snow is discharged, see “TO CONTROL SNOW DISCHARGE” in the Op- eration section of this manual.

SHEAR BOLTS (See Fig. 19)

AUGER SHEAR BOLTS

Both right and left-hand augers are secured to the auger shaft with a shoulder/shear bolt and hex nut. Should a for- eign object or ice become lodged in the augers, the shear bolts are designed to break, preventing damage to any other components. If one or both augers do not turn when auger control lever is engaged, check to see if one or both of the bolts have sheared. To replace the shear bolts:

1.Disengage all controls and move throttle control to STOP position. Wait for all moving parts to stop.

2.Remove safety ignition key and disconnect spark plug wire from spark plug. Place wire where it cannot come in contact with plug.

3.Align hole in auger hub with hole in auger shaft and install a new 1/4-20 x 2" shoulder/shear bolt and spacer. Install 1/4-20 lock nut and tighten securely.

CAUTION: Do not substitute. Use only original equipment shear bolts as supplied with your snow thrower.

4.Connect spark plug wire to spark plug. Replace safety ignition key.

IMPELLER SHEAR BOLTS

The impeller is secured to the impeller shaft with two (2) capscrew/shear bolts and hex nuts. Should a foreign object or ice become lodged in the impeller, the capscrews are designed to break, preventing damage to any other com- ponents. If impeller does not turn when auger control lever is engaged, check to see if the capscrews have sheared. To replace the capscrew/shear bolts:

1.Disengage all controls and move throttle control to STOP position. Wait for all moving parts to stop.

2.Remove safety ignition key and disconnect spark plug wire from spark plug. Place wire where it cannot come in contact with plug.

3.Align holes in impeller hub with holes in impeller shaft and install two (2) new 1/4-20 x 1-5/8" capscrew/shear bolts. Install 1/4-20 locknuts and tighten securely.

CAUTION: Do not substitute. Use only original equipment capscrew/shear bolts as supplied with your snow thrower.

4.Connect spark plug wire to spark plug. Replace safety ignition key.

1/4-20	1/4-20 x 1-5/8	1/4-20 x 2
LOCKNUT	CAPSCREW /	SHOULDER /
	SHEAR BOLT	SHEAR BOLT
	IMPELLER HUB
	IMPELLER	SPACER
	SHAFT
		AUGER
		HUB
1/4-20
LOCKNUT	AUGER HUB	AUGER SHAFT

FIG. 19

TO REMOVE BELT COVER (See Fig. 20)

1.Remove the two screws securing belt cover to frame.

2.Remove belt cover.

•Replace belt cover by installing cover and screws and tighten securely.

FRAME BELT COVER SCREWS

FIG. 20

TO REPLACE BELTS (See Fig. 22)

The auger and traction drive belts are not adjustable. If the belts are damaged or begin to slip from wear, they should be replaced. It is recommended that the belt(s) be replaced by a authorized service centre/department.

NOTE: It is recommended that both the auger and traction drive belt be replaced at the same time.

The V-belts on your snow thrower are of special construction and should be replaced by original equipment manufacturer (OEM) belts available from your nearest authorized service centre/department. Using other than OEM belts can cause

15 personal injury or damage to the snow thrower.