| 
                        O-Rings Guide Sleeve & Bit Ret. (3) DTH-RH550w-8in                     | 
                                                    
                            
                                             | In Seal Kit 3DTH-RH550w-8in | 
                                
                | 
                        O-Ring Top Sub ID (2) DTH-RH550w-8in                     | 
                                                    
                            
                                             | In Seal Kit 2DTH-RH550w-8in | 
                                
                | 
                        Seal Kit  DTH-RH550w-8in                     | 
                                                    
                            
                                             | 38-88056 | 
                                
                | 
                        Guide Sleeve with 2 O-Rings (14) DTH-RH550w-8in                     | 
                                                    
                            
                                             | 26-88J10A | 
                                
                | 
                        Feed Tube Retainer Pin DTH-RH550w-8in                     | 
                                                    
                            
                                             | 12-99016 | 
                                
                | 
                        Choke Set, Blank  DTH-RH550w-8in                     | 
                                                    
                            
                                             | 29-68017A | 
                                
                | 
                        Rebuild Kit  & Seal Kit  DTH-RH550w-8in                     | 
                                                    
                            
                                             | 38-88302-19 | 
                                
                | 
                        Feed Tube With Retainer Pin and Blank Choke DTH-RH550w-8in                     | 
                                                    
                            
                                             | 37-88301A | 
                                
                | 
                        Top Subs with 3 O-Rings 4 1/2"  DTH-RH550w-8in                     | 
                                                    
                            
                                             | 33-88302-19A | 
                                
                | 
                        Bit Retainer Ring w/O-Ring (14) DTH-RH550w-8in                     | 
                                                    
                            
                                             | 27-88006A | 
                                
                | 
                        Piston DTH-RH550w-8in                     | 
                                                    
                            
                                             | 36-88J81 | 
                                
                | 
                        Check Valve Spring DTH-RH550w-8in                     | 
                                                    
                            
                                             | 38-1-1235-073 | 
                                
                | 
                        Piston Case with Retainer Ring DTH-RH550w-8in                     | 
                                                    
                            
                                             | 35-88302A | 
                                
                | 
                        O-Ring Top Sub OD (1) DTH-RH550w-8in                     | 
                                                    
                            
                                             | In Seal Kit 1DTH-RH550w-8in | 
                                
                | 
                        Driver Sub DTH-RH550w-8in                     | 
                                                    
                            
                                             | 34-88007 | 
                                
                | 
                        Piston Retainer Ring DTH-RH550w-8in                     | 
                                                    
                            
                                             | 23-99030 | 
                                
                | 
                        Check Valve Guide DTH-RH550w-8in                     | 
                                                    
                            
                                             | 39-88001 |