This document provides instructions and information for service technicians working on ProCore 434 and 678 aerators. It includes safety warnings and instructions, maintenance procedures, and part numbers. The Toro Company reserves the right to change product specifications without notice. Technicians are advised to carefully read all instructions to prevent damage to systems or components on the machines.

1. 
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   
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
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    
 
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  

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
       

The Toro Company − 2007

2. 

Chapter 1 − Safety
Safety Instructions 1 − 2
Safety and Instruction Decals 1 − 4
Chapter 2 − Product Records and Maintenance
Product Records 2 − 1
Maintenance 2 − 1
Equivalents and Conversions 2 − 2
Torque Specifications 2 − 3
Chapter 3 − Chassis
Service and Repairs 3 − 2
Chapter 4 − Coring Head
Specifications 4 − 2
General Information 4 − 4
Special Tools 4 − 9
Service and Repairs 4 − 10

3.  Page 1 − 1 Safety
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 
 
 
 
 

4. Page 1 − 2
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
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


     
        






 








Bloomington, Minnesota 55420−1196
 



 


 

 

 


5.  Page 1 − 3 Safety

 


 
 
 

 

 
     

    
      


 
       



     

 


 
 

 




 




 

        

 

      


 


 





        

 


6. Page 1 − 4








7.  Page 2 − 1 Product Records and Maintenance



 
 
 
 
 
 
 

 

 
 
 

    


 








8. 
Page 2 − 2


9.  Page 2 − 3 Product Records and Maintenance


 



      
 











       

      








  


 


10. Page 2 − 4














in−lb in−lb N−cm in−lb N−cm in−lb N−cm
# 6 − 32 UNC
  
   
# 6 − 40 UNF
  
   
# 8 − 32 UNC
  
   
# 8 − 36 UNF
  
   
# 10 − 24 UNC
  
   
# 10 − 32 UNF
  
   
1/4 − 20 UNC       
1/4 − 28 UNF       
5/16 − 18 UNC       
5/16 − 24 UNF       
ft−lb ft−lb N−m ft−lb N−m ft−lb N−m
3/8 − 16 UNC       
3/8 − 24 UNF       
7/16 − 14 UNC       
7/16 − 20 UNF       
1/2 − 13 UNC       
1/2 − 20 UNF       
5/8 − 11 UNC       
5/8 − 18 UNF       
3/4 − 10 UNC       
3/4 − 16 UNF       
7/8 − 9 UNC       
7/8 − 14 UNF       
 



 


       

       





11.  Page 2 − 5 Product Records and Maintenance





 



  5 in−lb  60 N−cm  7 in−lb  80 N−cm
  9 in−lb  100 N−cm  13 in−lb  150 N−cm
  2 ft−lb  3 N−m  2 ft−lb  3 N−m
  4 ft−lb  5 N−m  5 ft−lb  7 N−m
  7 ft−lb  10 N−m   9 ft−lb   12 N−m
   15 ft−lb  20 N−m  22 ft−lb  30 N−m
  33 ft−lb  45 N−m  37 ft−lb  50 N−m
 



 


       

       




12. Page 2 − 6





 
1/4 − 20 UNC  20 in−lb  12 in−lb
5/16 − 18 UNC  35 in−lb  20 in−lb
3/8 − 16 UNC  10 ft−lb  3 ft−lb
1/2 − 13 UNC  15 ft−lb  10 ft−lb



 
No. 6 − 32 UNC  5 in−lb
No. 8 − 32 UNC  5 in−lb
No. 10 − 24 UNC  7 in−lb
1/4 − 20 UNC  15 in−lb
5/16 − 18 UNC  20 in−lb
3/8 − 16 UNC  100 in−lb

 
7/16 − 20 UNF

 10 ft−lb  14 N−m
1/2 − 20 UNF

 10 ft−lb  14 N−m


 10 ft−lb  14 N−m


 10 ft−lb  14 N−m
** For steel wheels and non−lubricated fasteners.






 

    5 in−lb
    5 in−lb
    7 in−lb
    15 in−lb


values. All torque values are based on non−lubricated


in−lb X 11.2985 = N−cm N−cm X 0.08851 = in−lb
ft−lb X 1.3558 = N−m N−m X 0.7376 = ft−lb

13.  Page 3 − 1 Chassis



 
 
 
 
 
 

14. Page 3 − 2


 
 
 
 
 
 
 
 
 

 







 





















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16.  Page 3 − 3 Chassis

 



 
 
 

 



 

        






    

 

 

 







 

 

 



 

 




       



 

17. Page 3 − 4
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
 
 
 
 
 
 
 
 
 

 

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
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
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
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