Weifang 495 - Inspecting and Lapping Valve; Adjusting Valve Lash

inSert the.feeler gatlge in tUrn -between "the stemend'and tht r(Jeker
arm head of eac11 valve mentioned, and turn the adjustin·gscrew
until-the' gallge feels' rtip'ped very slig·htly, then hold' the· adjusting
screw with a screwdriver and tighten the locking nut ;one after an-
·other.·Slide the-feeler gauge \slowly toche~.k the lashes again until
the' requirement is fulfilled. ·After this· ,turn the flywheel for' Just
once revolution to· keep the,piston of· the··fourth cylinder' being at
,the top d~ead centre in" its compression stroke· :an'dadjust the· valve
la,shes oft the ,exh,a.ust valve on the' second cylinder ".of the~,irrtake
valve on the third cylinder and of both, tbe intake' a:ndexhaust
valves' on' the fourth cylinder \vith the same method me:ntioned
a,boveas .sh·o,\vn in Fig. 6.
. F:ig;' 6"·'Adjustin.gv,,lvelas;h
-.~ "'. '\ '-',
(!:) Inspecting,a.}:let.L,?-PPIPg, .VaJ v~:
During the £Otlrth orcler mairl tenCince of the diesel engln'e or
when the \'alve lea'kage 11as been discovered, the valves shoLlld be
dismc)UI1.ted to remov'e the, carbon depo,sits'arld to check their air