Great Wall GW491QE, Service Manual

Page: 146 / 222

EM.1-23
5.฀Installation฀of฀flywheel
When฀flywheel฀has฀been฀installed฀to฀a฀place฀behind฀the฀crankshaft,฀manually
rotate฀the฀flywheel฀to฀make฀it฀facing฀exactly฀the฀assembly฀mark฀made฀on฀the
rear฀end฀surface฀of฀crankshaft,฀then฀six฀flywheel฀bolts฀will฀be฀used฀to฀fix฀the
flywheel฀onto฀the฀rear฀end฀of฀crankshaft:฀the฀bolts฀shall฀be฀subject฀to฀a฀pre-
tightening฀made฀by฀a฀pneumatic฀wrench,฀and฀a฀re-tightening฀diagonally฀to฀the
specified฀moment฀made฀by฀a฀stud฀bolt฀tightener.
฀ Tightening฀ moment (85 3)N m
6.฀Installation฀of฀camshaft฀component
(a)Installation฀of฀camshaft
-Appropriate฀amount฀of฀clean฀oil฀shall฀be฀applied฀to฀five฀main฀neck-journal s
on฀camshaft,฀and฀to฀gears฀which฀connects฀with฀the฀transmission฀shaft฀of฀oil
pump.
-Hold฀the฀front฀side฀of฀camshaft฀by฀right฀hand,฀and฀hold฀the฀middle฀position
of฀camshaft฀by฀left฀hand,฀and฀slowly฀install฀camshaft฀into฀its฀installation฀hole.
During฀installation,฀the฀camshaft฀may฀be฀drawn฀manually฀via฀original฀installation
hole฀for฀petrol฀pump฀on฀the฀engine฀body,฀and฀will฀be฀pushed฀to฀the฀end฀afte r
each฀neck-journal฀is฀installed฀onto฀respective฀camshaft฀lining.
-The฀ thrust฀ collar฀ of฀ camshaft฀ shall฀ be฀ fixed฀ onto฀ engine฀ body฀ at฀ the
camshaft฀ hole฀ using฀ two฀ M8
16฀ bolts with฀ flat฀ washer฀ and
standardspring฀washer .
Tightening฀ moment (18 3)N m
R emark T he฀thrust฀collar฀of฀camshaft฀shall฀make฀the฀side฀having฀‘ pit’ mark
face฀outward.
(b)Manually฀rotate฀the฀camshaft,฀and฀its฀rotation฀shall฀be฀flexible.฀T henthe
woodruff฀key฀of฀camshaft฀must฀be฀turned฀to฀an฀upward฀position.
(c)Assembly฀of฀chain฀shock-absorber Using฀brush,฀a฀layer฀of฀clean฀oil฀may
be฀applied฀to฀the฀rubber฀surface฀of฀chain฀shock-absorber,฀which฀will฀be฀fixed฀to
an฀appropriate฀position฀inside฀chainwheel฀chamber฀using฀two฀M8
16฀bolt
with฀standard฀spring฀washer and฀be฀tightened฀to฀the฀specified฀moment
using฀a฀fixed-torque฀wrench.
Tightening฀ moment (18 3)N m
(d)Installation฀ of฀ tappet฀ component Prior฀ to฀ the฀ assembly,฀ tappet
component฀shall฀be฀soaked฀in฀clean฀oil฀to฀provide฀a฀preliminary฀lubrication
between฀tappet฀and฀tappet฀hole฀or฀between฀tappet฀and฀the฀cam฀of฀camshaft,
followed฀by฀an฀manual฀installation฀of฀eight฀hydraulic฀tappets฀successively
into฀tappet฀holes.
฀ ฀ ฀ ฀ ฀Precautions
฀฀฀฀฀ ฀-A lways฀keep฀it฀clean฀and฀avoid฀pollution฀dur ing฀the฀whole฀cour se฀of
฀฀฀฀฀฀฀assembly.
฀฀฀฀฀-Pr event฀camshaft฀fr om฀touching฀or ฀str iking฀its฀lining฀dur ing฀the
฀฀฀฀฀฀installation.
฀฀฀฀฀-Woodr uff฀key฀shall฀be฀installed฀to฀place฀to฀have฀its฀upper ฀plane฀par allel
฀฀฀฀฀฀to฀the฀neck-jour nal฀of฀camshaft.
Preparations฀before฀and฀key฀points฀to฀the฀disassembly฀of฀engine฀body
ProCarManuals.com