John Deere ET-3103-J Manuale Utente

22 

 

 

 Cordless Impact Wrench Operator's Manual 

  

1.  Checking the condition of the socket:

 

A worn or deformed hex or a square-holed socket will not give an adequate tightness    

 

to the fitting between the nut or anvil, consequently resulting in loss of tightening  

 

 

torque. Pay attention to wear of a socket holes periodically, and replace with a new    

 

one if needed.

2.  Check the Screws:

 

Loose screws are dangerous. Regularly inspect them and make sure they are tight.

3.  Maintenance of the motor:

 

The motor unit winding is the very “heart” of the power    

 

tool.

 

Exercise due care to ensure the winding does not  

 

 

become damaged and/or wet with oil or water.

4.  Inspecting the carbon brushes (Fig. 19):

 

The motor employs carbon brushes which are  

 

 

consumable parts. Since and excessively worn carbon   

 

brush can result in motor trouble, replace the carbon    

 

brush with new ones when it becomes worn to or near    

 

the “wear limit”. In addition, always keep carbon  

 

 

brushes clean and ensure that they slide freely within    

 

the brush holders.

 

5.  Replacing carbon brushes:

 

Take out the carbon brush by first removing the brush    

 

cap and then hooking the protrusion of the carbon  

 

 

brush with a flat head screw driver, etc., as shown in    

 

Fig. 21.

 

When installing the carbon brush, choose the direction   

 

so that the nail of the carbon brush agrees with the  

 

 

contact portion outside the brush tube. Then push it in    

 

with a finger as illustrated in Fig. 22. Lastly, install the    

 

brush cap.

(Fig. 19)

(Fig. 20)

(Fig. 21)

(Fig. 22)