... *28*68,34*28*78,34*30*78...The spring pin bush is bi-metal bushing, resist against tiredness.. Specification:30 ... *28*68,34*28*78,34*30*78...The spring pin bush is bi-metal bushing,resist against tiredness, abrasion, heat ... with the connecting rod clevel, rocker, gear case, cranking motor, trig chasis, and motor gear case ,redirector, hydraulic pressure oil pump, engineer ...