Maintenance Instructions

REPLACING/REPAIRING/ ADJUSTMENTS

2.Loosen the three (3) nuts and three (3) bolts on lower pulley bearing support and the adjust- ment nut on the lower end of each (2) eyebolts to release belt tension.

3.Loosen the two (2) set screws securing the up- per pulley bearing to the shaft. Unbolt and re- move the upper pulley bearing support.

4.Install the new drive belt and reinstall the upper pulley bearing support. Secure the bearing on the shaft by tightening the two set screws.

5.Adjust the belt tension. Refer to ADJUST- MENTS of Debris Blower Drive Belt Tension in this section. Tighten fasteners securely and reinstall belt guard by reversing the removal procedures.

Upper

Support Bolts

Lower

 

 

Support

 

 

Eyebolt

Bolts

 

 

 

Debris Blower Drive Belt

Debris Blower Rotation Pinions

1.Remove the drive pinion from the rotation han- dle by loosening the set screw and pulling off the pinion.

2.Remove the rotation handle lower stop ring and pull up on the rotation handle. Loosen set screw in upper stop ring. Pull rotation handle up out of work way. Unbolt and remove the driven pinion.

3.Install the new driven pinion and tighten the nut and bolt securely.

4.Lower the rotation handle back into its original position and reinstall the lower stop ring. Posi- tion the new drive pinion flush with the shaft and securely tighten the pinion set screw.

5.Adjust the rotation pinions as instructed in AD- JUSTMENTS of Debris Blower Rotation Pin- ions in this section. Securely tighten the set screw of each stop ring.

Rotation Handle

Upper Stop

Ring

Lower

Stop Ring

Driven Pinion

Drive Pinion

Debris Blower Rotation Pinions

ADJUSTMENTS

WARNING

DO NOT attempt to make any adjustments with the tractor engine running. Disen- gage the PTO clutch, stop the engine, and remove the ignition key. Wait for all move- ment to stop before getting off the seat.

Dozer Blade Skid Shoes

Adjust the skid shoes to allow the required clear- ance under the blade. On level, paved surfaces, adjust the skid shoes to allow approximately 1/4 in. (6 mm) clearance between the cutting edge and the surface. On uneven or gravel surfaces, allow 1/2 to 3/4 in. (13 to 19 mm) clearance, depending on the size of the gravel. Refer to Skid Shoe Height Ad- justment illustration.

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Walker DB6660, SB6670, DB6680, RB6650, IH6620 owner manual Adjustments, Dozer Blade Skid Shoes