are you talking about the engine compartment cowling, the part to which the seat is mounted? or are you talking about some other engine cover? if you operate a truck as a rough terrain truck because it is diesel powered and has pneumatic tires, then you should expect some failures, if you purchase a rough terrain truck you might not see those same failures, besides, the trucks are warrantied for so long because that is how long you can be sure they will last....
if you want to go "baja" buy a bobcat, in my humble opinion...

maybe your operators need to loose some weight?