Why does the diesel engine of a rough terrain forklift frequently blow cylinder head gaskets?

When the cylinder head gasket of a rough terrain forklift is burned out by the high-temperature gas inside the cylinder, it is called "blown head gasket," also known as "burned head gasket." The rise in oil level in the diesel engine oil pan of a rough terrain forklift is caused by diesel fuel or water entering the oil pan. For some diesel engines that are not equipped with a crankshaft rear skeleton oil seal, the oil level rise may also be due to hydraulic transmission oil entering the oil pan.