Ye trally khet me fail hai. Loaded trolly me Jab sabse aage wale tire k aage chadai aaygi to ye trolly aage se ekdum halki ho jaayegi jisse tractor k tire pe weight nhi rehega aa vo slip karega .aur jab is fully loaded trolly ko dhalaan se neeche utaare hue k sabse pichle wale tyre pe weight aayega to ye aage tractor pe achanak se weight degi jisse hitch ya tractor k excel tak k tootne k chance hai. Ye problem double excel trolly me bhi hai aur ye to triple excel hai isme to usse kafi jada aane wali hai ye dikkat. Is trolly me jhula system dena chaiye jaise zandu sirhind walo ne diya hai aur jaise trucks me aata hai