left track idler 左履带托链轮

track idler cap 履带引导轮罩盖

front track idler 前履带引导轮

track idler shaft 履带引导轮轴

track idler group 履带引导轮组

track idler assembly 履带引导轮总成

track idler cap bolt 履带引导轮罩盖螺栓

track idler cap group 履带引导轮罩盖组

track idler bearing lock 履带引导轮轴承锁