A railroad may not place or continue in service a car, if the car has—
    
    
        
        (a) 
         A side frame or bolster that—
     
    
    
        
        (2) 
         Has a crack of  1/4 of an inch or more in the transverse direction on a tension member;
     
    
        
        (b) 
         A truck equipped with a snubbing device that is ineffective, as evidenced by—
     
    
        
        (1) 
         A snubbing friction element that is worn beyond a wear indicator;
     
    
        
        (2) 
         A snubber wear plate that is loose, missing (except by design), or worn through;
     
    
        
        (3) 
         A broken or missing snubber activating spring; or
     
    
        
            Code of Federal Regulations
        
        
            
		
      [Please see PDF for image:
 EC01AP91.002
] 
    
        
    
    
        
        (4) 
         Snubber unit that is broken, or in the case of hydraulic units, is broken or leaking clearly formed droplets of oil or other fluid.
     
    
        
        (c) 
         A side bearing in any of the following conditions:
     
    
        
        (1) 
         Part of the side bearing assembly is missing or broken;
     
    
        
        (2) 
         The bearings at one end of the car, on both sides, are in contact with the body bolster (except by design);
     
    
        
        (3) 
         The bearings at one end of the car have a total clearance from the body bolster of more than  3/4 of an inch; or
     
    
        
        (4) 
         At diagonally opposite sides of the car, the bearings have a total clearance from the body bolsters of more than  3/4 of an inch;
     
    
    
        
        (1) 
         That do not maintain travel or load;
     
    
        
        (2) 
         That are compressed solid; or
     
    
        
        (3) 
         More than one outer spring of which is broken, or missing, in any spring cluster;
     
    
        
        (e) 
         Interference between the truck bolster and the center plate that prevents proper truck rotations; or
     
    
        
        (f) 
         Brake beam shelf support worn so excessively that it does not support the brake beam.