I just bought a home with an approximately 10-11 year old Canyon Country series 310.  The secondary burn tubes (4) were shot so I ordered a new set along with new baffle board and blanket.  Even though two were rusted through and the other two looked pretty bad, I had to cut them out.  I am having great difficulty putting in the new tubes even though the directions act like it’s simple to just put them in.  I was able to put the back one in with just a little pounding but no luck with the rest.
Has anyone changed these out before? Is there some trick I’m missing? Should I just pound the rest in or am I risking damaging the fire box?
	
		
			
		
		
	
				
			Has anyone changed these out before? Is there some trick I’m missing? Should I just pound the rest in or am I risking damaging the fire box?
 
	 
	 
 
		![[Hearth.com] Secondary Burn Tube Replacement](/talk/data/attachments/246/246910-b8263eb66d1af7334e62b1f20776ede1.jpg?hash=CjzPueeQqW) 
			![[Hearth.com] Secondary Burn Tube Replacement](/talk/data/attachments/246/246911-75c32355abdd2699fae8ee570151aa62.jpg?hash=CGbMmP3Oop) 
			 
 
		 
 
		