SCIENCE OF SUCCESSFUL THRESHING 



THUMB NUT 



SPRING 



PLUNGER 



BODY 



SHANK 



REGULATING 

 SCREW 



ing the thumb nut will cause the spring to force some of 

 the grease down to the journal. The size of the hole 

 through the shank can be adjusted by the regulating screw, 



to feed the required 

 amount of grease. The 

 hole in the screw is in line 

 with the slot in its head. 

 If it be desired to stop the 

 flow of grease, turn the 

 thumb nut down to the cap 

 which will relieve the 

 spring of tension. If the 

 plunger turns when screw- 

 ing the thumb nut, it may 

 be held by the knurled 

 head of the screw. 

 To Attach Oil Pump to "Case" Engines. The body 

 of the pump is attached to the steam chest by a stud bolt, 

 which is located one inch from the top of the chest, and one 

 and three-quarter inches from the face of the chest cover 

 flange. When the hole for the stud bolt is drilled it must 

 be tapped so that the five-eighth inch stud bolt will screw 

 in steam-tight. The rod for operating the ratchet may be 

 attached to the rocker-arm of any "Case" simple engine. 

 To locate the hole for the shoulder-bolt in the rocker-arm, 

 measure five inches below the center of rocker-arm bearing, 

 and one-half inch from the edge of the arm. This hole 



FIG. II. SECTIONAL VIEW OF 

 "IDEAL" CUP. 



