TE450 SM service manual.pdf - Hyosung

ENGINE 3-24▣ VALVE STEM RUNOUTCheck the valve stem for abnormal wear or bend.Support the valve using a V-blocks and measure thevalve stem runout using the dial gauge, as shown.If the service limit is exceeded or abnormal conditionexists, replace the valve with a new one.Cylinder headValve stem runoutdistortionService limit0.05 mm (0.002 in)Dial gauge : 09900-20606Magnetic stand : 09900-20701V-block : 09900-21304▣ TAPPET & SHIM WEARWhen measuring the valve clearance, the clearanceshould be within the standard range.Valve clearanceIntake valveExhaust valveStandard (When cold)0.1 ~ 0.2 mm(0.004 ~ 0.008 in)0.2 ~ 0.3 mm(0.008 ~ 0.012 in)● Inspect the tappet for wear and scratch.If modification or scratch is present, replace thetappet.● When you checked the valve clearance, if thevalve clearance is wide please replace the presentshim into thick one, if the valve clearance is narrowplease replace the present shim into thinshim. (Refer to page 8-33∙34)▣ SHIM KINDThere are 49 kinds of shim which thickness is increasedby each 0.025 mm from 2.30 mm to 3.50 mm.