LINK AS 2308123 - Caterpillar

Table 1
Effective Machines that Utilize the 7W-7765 Electric Starting Motor Gp    
Sales Model     Serial Number Range    
621G     S/N:DBB665-UP    
623G     S/N:DBC509-UP    
627G     S/N:DBD914-UP    
657G     S/N:W1E320-UP    
657G     S/N:W1F167-UP    
657G (1)     S/N:W1B141-UP    
657G (1)     S/N:W1C284-UP    
( 1 ) These serial numbers for the wheel tractors correlate with the wheel tractor-scrapers that are listed above. The serial numbers for the wheel tractors are provided for reference only.
Table 2
Effective Machines that Utilize the 171-5288 Electric Starting Motor Gp    
Sales Model     Serial Number Range    
627G     S/N:DBZ924-UP    
637G     S/N:DEX394-UP    
637G     S/N:DEY228-UP    
627G (1)     S/N:DBD922-UP    
637G (1)     S/N:DFJ413-UP    
( 1 ) These serial numbers for the wheel tractors correlate with the wheel tractor-scrapers that are listed above. The serial numbers for the wheel tractors are provided for reference only.