Poulan 438371 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 the on/off switch is in the OFF 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 come in contact with 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 shear bolt and hex nut. Should a foreign ob- ject 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" shear bolt. 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:

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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

 

 

SHAFT

 

 

 

AUGER

 

 

HUB

1/4-20

 

 

LOCKNUT

AUGER HUB

AUGER SHAFT

FIG. 19

TO REMOVE BELT COVER (See Fig. 20)

1.Remove the two (2) screws securing belt cover to frame.

2.Remove belt cover.

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

BELT

COVER

FRAME

SCREWS

FIG. 20

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Contents Model Number Snow ThrowerSafe Operation Practices for Walk-Behind Snow Throwers Table of Contents Assembly / PRE-OPERATION HOW to SET UP Your Snow ThrowerParts Packed Separately in Carton Remove Snow Thrower from CartonInstall Traction Drive Control ROD See Figs Install Speed Control ROD See FigsUnfold Upper Handle Install Auger Control ROD See Figs Install Discharge Chute / Chute Rotater Head See FigInstall Chute Deflector Remote Control See Figs Check Tire PressureOperation Know Your Snow ThrowerPrimer Ignition KEYMeets A.N.S.I. Safety Requirements Recoil auxiliary starter handle used for starting the engineHOW to USE Your Snow Thrower StoppingTo USE Choke Control See Fig To Control Snow Discharge See FigUsing the CLEAN-OUT Tool See Fig Power Steering Operation See FigTo Throw Snow See Fig To Move Forward and Backward See FigTo Adjust Skid Plates See Fig Before Starting the EngineScraper BAR See Fig Check Engine OIL Level See FigSnow Throwing Tips To Start EngineBefore Stopping If Recoil Starter has FrozenMaintenance General RecommendationsBefore Each USE LubricationCleaning EngineService and Adjustments To Adjust Snow Thrower HeightChute Deflector Shear Bolts See FigTo Replace Belts See Fig To Adjust Cable Tension See Fig To Remove Wheels See FigCarburetor Engine SpeedStorage OtherFuel System Engine OILTroubleshooting Service Notes Exploded KEY Part Description Auger Housing Scraper BARAuger Bearing Bearing PlugAuger 27 LH Auger 27 RHSkid Plate LH Skid Plate RHDeflector Seal Knob BlackPOP Rivet Chute Snow Shield 419822X431 Shield Retainer StrapKEY Part Loop Handle LH Loop Handle RH419797X431 Lower HandleSpacer RetainerKnob RED Handle KnobCarriage Bolt 5/16-18 X 155377 NUT 5/16-18 169675 Wire Harness Console PanelHeadlight Bezel Flood HeadlightRepair Parts Snow Thrower - Model Number PR8P27ES Drive Speed Selector Assembly Drive Plate AssemblyWheel HUB END PlateAxle Shaft SprocketENGINE, B&S Frame436146X421 Engine Mounting Plate428684 Cover Wheel DriverWheel Lobe Clutch SlideCable Bracket LH Wheel Assembly LHCable Bracket RH Safety Ignition KEY 193071DECAL, Danger 181037DECAL, DANGER, Deflector Service Notes Service Notes Service Notes Limited Warranty
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