(1) Complete all the contents of 50h technical maintenance;
(2) Replace the lubricant in the diesel engine oil pan.
(3) Clean and maintain the oil basin of the oil-bath air filter.
(4) Clean the hydraulic oil filter of the lifter and replace the filter element if necessary.
(5) Maintain the diesel engine in accordance with the requirements of "Secondary Technical Maintenance" in the "Diesel Engine Operation and Maintenance Manual".