LTJ2124 LTJ1821 the articulated static roller is designed as: short fuselage structure, the cab located at the central part which brings good vision for the driver, hydraulic steering, and the cab with anti-UV glass with air-conditioning device for option. Engine: using Yuchai YC6108G DI water-cooled diesel engine. Clutch: using Steyr automobile clutch, air power assistance, effortless manipulation. Gearbox: using the special roller gearbox made by the company, with three gears of forward and reverse respectively. Rear Axle: the rear axle with final planetary redactor specifically for rollers, which is made by the company. Braking System: with the hand brake for parking and the foot brake for moving; hand brake using the drum brake, the foot brake using disc brake with gas pushed oil assistance, which is safe and effortless. Sprinkler System: sprinklers and mud scrapers are installed in both and rear wheels, with large-capacity glass steel water tanks, using electric sprinkler.