PROJECTS IN FARM MACHINERY REPAIR 303 



273. Repair of Peg-Toothed Harrow. (Fig. 317.) 



1) Frames Straighten all bent parts and tighten bolts. 



2) Teeth Adjust to uniform depth. Re-sharpen worn 

 teeth, and renew lost ones. 



3) Levers Straighten all levers, renew worn parts and 

 tighten connections 



Tilting Lever 



Rocker Arm Adjusting Quadrant 

 Draft Hook 



-Tooth Bar 

 'Tooth Fastener 

 Frame' ~~~"~- Tooth 



FIG. 317. Peg-toothed harrow. 



4)' Draft Connections Renew if badly worn. Straighten if 

 bent. 



274. Repairing a Disc Harrow. (Figs. 318 and 318-a.) 



1) Frame See that all bolts are tight and all braces are 

 straight and rigid. 



2) Bearings Clean out bearings by washing with kerosene. 

 Replace if worn, pack grease cups and see that grease 

 gets to bearings. 



3) Discs Sharpen discs on regular sharpener or on emery. 



4) Gang Bolts See that gang bolts are straight and the 

 discs are tight on bolts so they will not wobble. 



5) Bumpers Adjust so they carry end thrust. 



