Singer 591 - The Oil Pump

THE OIL PUMP
TO LOOSEN
n
Fig. 18
TO REMOVE
1. Loosen the two oil pipe clamping sleeve nuts A2, Fig. 18.
2. Remove the three screws B2, Fig. 17.
3. Remove the screen frame, screen and oil pump cover C2, Fig, 17.
4. Remove the locking screw D2, Fig. 18.
5. Remove the impeller E2, by turning it overtoward the RIGHT(clockwise) to loosen it, asinstructed in Fig. 18.
CAUTION: The impeller E2 is designed to be screwed to the shaft by means of a LEFT-HAND THREAD and
must be turned over toward the right to be loosened. Avoid damage to this impeller, as the efficient automatic
lubrication of the machine is dependent upon it.
6. Remove the three screws F2.
7. Carefully pull the oil pump body off the lowerend of the upright arm shaft.
TO REPLACE
1. Place oil pump body on underside of machine bed,so that position pins 02, slip into proper holes in machine
casting, as shown above.
2. Replaceand securelytighten the three screwsF2. Makecertain that machineturns freelyas screwsare tightened.
3. Carefully replace impeller E2, turning it over toward the LEFT to screw it on armshaft (see CAUTION above).
4. Make certain that impeller E2 is not so tight that it will bind arm shaft. Make certain also that impeller clears
both top and bottom of interiorof oilpumpbody,then lockit in position by means of locking screw D2.
5.
Replace pump cover, screen and frame C2and three screws B2,Fig.17. Securely tighten screws B2.
6. Replace two oil pipesin oil pumpbody, asshownabove,andsecurely tighten sleeve nuts A2.
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From the library of: Superior Sewing Machine & Supply LLC