LUBRICATION AND ADJUSTMENT OF BEARINGS 47 



should be three-eighths inch in diameter. Compounded 

 engines (excepting the 75 H. P.), have a slide in place of 

 the rocker-arm, and on these engines the ratchet-rod is at- 

 tached to the eccentric- 

 rod by means of a clamp 

 provided for this pur- 

 pose. On portable en- 

 gines, the ratchet-rod 

 must be attached to the 

 valve slide, the three- 

 eighth inch hole for the 

 shoulder bolt being lo- 

 cated two and one-half 



FIG. 12. OIL PUMP ATTACHED. 



inches from the top and 



seven-eighths inch from the front edge of the slide. After 

 the pump body is attached, the ratchet-rod may be placed 

 in position, one end being 1 on the shoulder bolt of the 

 rocker-arm or clamp, and the other passing through the 

 knuckle-joint on the sliding ratchet-arm. Having con- 

 nected the ratchet-rod, screw the gravity check valve into 

 the hole in the throttle, using a bushing to bring it to the 

 right size. The soft one-quarter-inch tubing may be bent 

 to bring its ends in proper position in order to make the 

 connections at the unions. 



Instead of placing the oil pump on the steam chest, it 

 may be attached to the cylinder flange of the engine frame. 

 To do this, one of the studs must be replaced by another of 



