

- i: 



SERVICE 



3. Lift guide shoes and slide them out of the instrument in 

 opposite longitudinal directions. The guide shoes are mag- 

 netically retained and moderate force is required. 



Note: Guide Shoes cannot be removed with sense head in place. 



4. Insert new guide shoes by reversing the above procedure. 



5. Insert sense head by gently pushing it into the magnet assem- 

 bly. 



6. Secure sense head by tightening two brass srews on bottom of 

 instrument . 



CAUTION: Keep connectors absolutely cleanl 



Sense head, guide shoes and magnet assembly can be 

 cleaned with most cleaning compounds. Iron filings 

 can be removed from magnet assembly by using self- 

 adhesive tape. 



29 



