The cover is fully removable but it also has a hinge along the top to allow the front to lift up.  I would think the chorehorse could run either with or without the big cover. 
 
That picture was as good as I could get the original. 
 
Here is another picture.  This one shows the actual metal cover removed and placed on the ground.  The picture is taken from the book, Canada's Fighting Vehicles.
		 
		
		
		
			
		
		
		
		
		
		
			
				__________________ 
				Jordan Baker 
RHLI Museum, 
Otter LRC 
C15A-Wire3, 1944 
Willys MB, 1942 
10cwt Canadian trailer
			 
		
		
		
		
		
	
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