Cub Cadet 421R manual Shave Plate, Belt Tension, Carburetor

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SECTION 5: MAKING ADJUSTMENTS

WARNING: NEVER attempt to make any adjustments while the engine is running, except where specified in the operator’s manual.

Shave Plate

To check the adjustment of the shave plate, place the unit on a level surface. See Figure 12. The wheels, shave plate and augers should all contact level surface. Note that if the shave plate is adjusted too high, snow may blow under the housing. If the shave plate wears out excessively, or the unit will not self-propel, the shave plate may be adjusted too low.

NOTE: On new units or units with a new shave plate installed, the augers may be slightly off the ground.

Belt Tension

Periodic adjustment of the belt tension may be required due to normal stretch and wear on the belt. If augers hesitate while turning although engine maintains same speed, adjust tension following instructions below.

The upper hole in the control handle provides adjustment for belt tension. To adjust, disconnect the “Z” end of control cable from the bottom hole in the control handle. See Figure 14 . Hook the cable into the upper hole in control handle as shown here.

Upper

Hole

Clutch

Cable

Control

Housing

Augers

Shave Plate

Wheels

Figure 12

• To adjust, tip the snow thrower back so that it rests

Figure 14

If additional adjustment is required, follow steps below.

Remove the belt cover by removing five hex screws that hold it in place. See Figure 16.

There are three adjustment holes provided in the idler bracket assembly. See Figure 15. To adjust, move the extension spring on the end of the clutch cable to the next higher adjustment position on the idler bracket assembly. Reassemble belt cover.

High Position

on the handle. Loosen the lock nuts and bolts which

Idler

Middle Position

secure the shave plate to the housing. See Figure

13. Move the shave plate to desired position and

retighten the nuts and bolts. Make certain all nuts

and bolts are tightened securely.

Bracket

Low Position

Spring on

End of Clutch

Auger Cable

Pulley

Nuts & Bolts

Figure 13

Figure 15

Carburetor

WARNING: If any adjustments need to be made to the engine while the engine is running (e.g. carburetor), keep clear of all moving parts. Be careful of muffler, engine and other surrounding heated surfaces.

Refer to the separate engine manual, packed with your unit, for carburetor adjustment information.

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Contents Operator’s Manual Table of Contents Training Important Safe Operation PracticesMaintenance And Storage Assembling Your Snow Thrower Assembling Discharge Chute Installing Chute CrankStopping Engine Know Your Snow ThrowerOperating Your Snow Thrower Shave Plate Belt TensionCarburetor General Recommendations Maintaining Your Snow ThrowerReplacing Belt Replacing Shave PlateEngine LubricationProblem Cause Remedy Troubleshooting GuideRef. No Description Parts List for Model 421RModel 421R Ref. No Description Model 421R Ref. No Part Description Ref. No Description Model 421R MANUFACTURER’S Limited Warranty for