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

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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.

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Contents Snow Thrower Model NumberSafe Operation Practices for Walk-Behind Snow Throwers Table of Contents Parts Packed Separately in Carton Assembly / PRE-OPERATION HOW to SET UP Your Snow ThrowerRemove Snow Thrower from Carton Install Speed Control ROD See Figs Install Traction Drive Control ROD See FigsUnfold Upper Handle Install Auger Control ROD See Figs Install Discharge Chute / Chute Rotator Head See FigCheck Tire Pressure Ignition KEY OperationKnow Your Snow Thrower PrimerRecoil auxiliary starter handle used for starting the engine Meets A.N.S.I. Safety RequirementsStopping HOW to USE Your Snow ThrowerUsing the CLEAN-OUT Tool See Fig To Throw Snow See FigTo Move Forward and Backward See Fig To Start Engine Before Starting the EngineSnow Throwing Tips Before StoppingIf Recoil Starter has Frozen Maintenance Engine CleaningService and Adjustments To Adjust Snow Thrower HeightChute Deflector Frame Auger Assembly Housing Handles Fuel System StorageCarburetor Engine SpeedCylinder OtherTroubleshooting Auger Bearing Auger HousingKEY Part Description Scraper BARSkid Plate RH Auger 27 LHAuger 27 RH Skid Plate LHExploded Impeller Pulley Gearbox Assembly178675X008 Corner Bracket Clean OUT Tool BearingStrap Chute WeldmentDeflector Weldment Deflector SealRotator Pivot Bracket LEVER/CABLE Rotator AssemblyCable Assembly Rotator HeadRepair Parts Snow Thrower - Model NO. PR8527ES Handles Loop Handle RH Loop Handle LHTraction ROD ARM Control PanelControl Lever LH Control Lever RHCarriage Bolt 5/16−18 X 155377 NUT 5/16−18 169675 Repair Parts Snow Thrower - Model NO. PR8527ES Drive Clevis PIN 43 420900 Drive Plate AssemblyEND Plate Control ARMClik PIN Axle ShaftRoll PIN 3/16 SprocketENGINE, TEC FrameEngine Mount Plate Belt Cover Traction BeltImpeller Belt Wheel Assembly LH Repair Parts Snow Thrower - Model NO. PR8527ES WheelsRepair Parts Snow Thrower - Model NO. PR8527ES BAG of Parts Safety Ignition KEY35062 DECAL, DANGER, Deflector Repair Parts Snow Thrower - Model NO. PR8527ES Decals181037 DECAL, DangerService Notes Service Notes Limited Warranty

421028 specifications

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