Great Wall GW491QE, Руководство по обслуживанию

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EM.2-12
16.฀Inspection฀on฀inlet฀/outlet฀manifold
(a) Precise฀ruler฀and฀feeler฀gage฀may฀be฀used฀to฀check฀whether฀the฀surface
contacting฀cylinder฀head฀has฀any฀flexual฀deformation.
Max.฀flexure฀ 0.2฀mm฀for฀inlet฀manifold;฀0.7mm฀for฀outlet฀manifoldThe
manifold฀shall฀be฀changed฀if฀the฀flexure฀is฀greater฀than฀Max.฀value.
(b)฀The฀planeness฀on฀the฀surface฀where฀the฀inlet฀&outletmanifold฀are
connected฀with฀cylinder฀head฀shall฀not฀be฀greater฀than฀0.4mm.฀If฀the
actual฀planeness฀is฀greater฀than฀04mm,inlet฀&outlet฀manifold฀shall฀be
changed,฀or฀the฀connection฀surface฀shall฀be฀cut฀by฀milling฀machine฀to฀a
smooth฀degree,with฀Max฀milling฀amount฀as฀0.5mm.
-During฀a฀settlement฀test฀aimed฀at฀an฀inspection฀on฀the฀hydraulic฀tappet,
a฀sealing฀settlement฀tester฀may฀be฀used฀to฀apply฀a฀196N฀force฀onto฀the
plunger฀piston.฀And฀measure฀the฀time฀it฀takes฀to฀drop฀for฀1mm฀after฀it
has฀dropped฀for฀about฀2mm.
-Sealing฀&settlement฀time when฀at฀20
if฀the฀timeto฀drop฀for
1mm฀can฀not฀reach฀(7 50)seconds,฀the฀hydraulic฀tappet฀shall฀be฀changed.
(b)Inspection฀on฀push฀rod
-Max.฀radial฀runout฀at฀the฀middle฀of฀push฀rod shall฀ be฀ checked฀ as
indicated฀in฀the฀figure,฀and฀the฀push฀rod฀shall฀be฀changed฀if฀the฀actual
runout฀is฀greater฀than฀030mm.
-Check฀whether฀the฀oil฀hole฀on฀push฀rod฀has฀been฀blocked,if฀so,
compressive฀air฀may฀be฀applied฀to฀blow฀off฀any฀blocked฀material.
-
When฀hydraulic฀tappet฀is฀submerged฀in฀light฀oil,฀push฀the฀plunger฀piston
for฀several฀times฀to฀discharge฀air฀insidethe฀hydraulic฀tappet.
SST฀฀09276-71010
Assembly฀of฀cylinder฀head
Assembly฀of฀cylinder฀head
1.฀Check After฀a฀washing,฀the฀cylinder฀head,฀air฀inlet฀/outlet฀duct
and฀the฀combustion฀chamber฀shall฀be฀clean,฀and฀without฀any฀scratched,
knocked,฀or฀damaged฀trace฀on฀fabricated฀surface;฀and฀without฀any฀casting
defect฀on฀the฀surface฀of฀cylinder฀head.
Note:
1.฀The฀thickness฀of฀cylinder฀head฀conforming฀to฀Class฀ ฀E ur opean
standar d฀shall฀be฀0.5mm฀smaller ฀than฀that฀confor ming฀to฀C lass
E ur opean฀standar d; ฀And฀there’ s฀a฀mar k E 3 ฀made฀on฀the฀r ight
side฀of฀cylinder ฀head฀confor ming฀to฀C lass฀
฀E ur opean฀standar d,
and฀the฀other ฀one฀does฀not฀have฀this฀mar k.
2.฀A ny฀mis-installation฀across฀the฀E uropean-
฀cylinder฀head฀and
the฀E ur opean- cylinder ฀head฀is฀unallowable.฀I f฀ E ur opean-
cylinder ฀head฀was฀installed฀onto฀E ur opean-I I ฀device฀by฀mistake,฀it
might฀make฀the฀valve฀touch฀the฀piston I f฀E ur opean-
cylinder
head฀ was฀ installed฀ onto฀ E ur opean- ฀ device฀ by฀ mistak e,฀ the
per for mance฀of฀engine฀might฀be฀degr aded,฀and฀other ฀failur es฀might
occur฀accor dingly.
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