Poulan 421892 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.Disconnect spark plug wire from spark plug and 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. 17)

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 spark 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.Insert safety ignition key and reconnect spark plug wire to spark plug.

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 spark 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.Insert safety ignition key and reconnect spark plug wire to spark plug.

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. 17

TO REMOVE BELT COVER (See Fig. 18)

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. 18

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Contents Model Number Snow ThrowerSafe Operation Practices for Walk-Behind Snow Throwers Table of Contents Parts Packed Separately in Carton EXT RA Shear Bolts and NutsRotator Head Mounting Chute Deflecto R Remote Cont ROLAssembly / PRE-OPERATION HOW to SET UP Your Snow ThrowerRemove Snow Thrower from Carton Unfold Upper HandleInstall Traction Drive Control ROD See Figs Install Auger Control ROD See FigsHead See Fig Install Discharge Chute / Chute RotatorCheck Tire Pressure Operation Know Your Snow ThrowerPrimer Ignition KEYDeflector remote control lever used to change Meets A.N.S.I. Safety RequirementsDischarge chute control lever used to change the di HOW to USE Your Snow Thrower StoppingUsing the CLEAN-OUT Tool See Fig To Move Forward and Backward See FigTo Adjust Skid Plates See Fig Before Starting the EngineCheck Engine OIL Level See Fig ADD Gasoline See FigSnow Throwing Tips To Start EngineBefore Stopping If Recoil Starter has FrozenMaintenance Cleaning EngineService and Adjustments To Adjust Snow Thrower HeightChute Deflector Shear Bolts See FigTo Replace Belts See Fig Storage Troubleshooting OtherExploded KEY Part Description Auger Housing Auger Assembly LHAuger Assembly RH Scrapper BARAuger Bearing Bearing PlugKnob Black POP RivetWasher Plastic WasherLEVER/CABLE Rotator Assembly Cable AssemblyRotator Head Rotator Pivot BracketSpacer RetainerKnob RED Handle KnobPanel Bracket LH Panel Bracket RH Handle GripLower Tube Pivot SupportImpeller ROD Assembly Traction ROD AssemblyShifter ROD TOP Shifter ROD Bottom183352 Console PanelDrive Speed Selector Assembly Drive Plate AssemblyShoulder Screw END PlateAxle Shaft Roll PIN 3/16Sprocket Clik PINTecumseh Engine Model FrameEngine Mount Plate Belt CoverWheel Assembly LH Safety Ignition KEY187831X421 187866X421DECAL, Danger DECAL, Poulan PRO, HP/24DECAL, DANGER, Deflector DECAL, Poulan PROLimited Warranty