JOBSHEET PRAKTEK NAMA SEKOLAH
SMK NUSANTARA RANTEPAO
KOMP KOMPET ETEN ENSI SI KEAH KEAHLI LIAN AN
TEKN TEKNIK IK KEND KENDAR ARAA AAN N RINGA RINGAN N
MATA PELAJARAN
OVERHOUL ENGINE
KELAS
XI
NAMA PRAKTEK
PEMERIKSAAN BLOG SELINDER
1. Tujua Tujuan n Khusus Khusus Pembe Pembelaj lajara aran n •
Memeriksa secara visua !"k sii#$er
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Memeriksa keurusa# !a#%aa# u%ama
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Memeriksa saura# "i
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Me#&ukur %a!u#& sii#$er
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Me#&&a#%i %a!u#& sii#$er !asa'
() ALAT DANBAHAN
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AL AT K"%ak aa%
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Mis%ar !a*a
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Pe#&ukur %a!u#&
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Kai# a,
sii#$er
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Pem!ersi'
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+uer Gau&e
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Mis%ar s"r"#&
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Mikr"me%er uar
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Lam,u ker*a
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Pis%" u$ara
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Skra,
BAH AN B"k sii#$er Am,as
3. LANGKAH KERJA Pembersihan •
Bersi'ka# !"k sii#$er $e#&a# ,e#cuci
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Bersi'ka# saura#-saura# "i $e#&a# ,is%" u$ara
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Bersi'ka# ,ermukaa#-,ermukaa# ,ermukaa#-,ermukaa# .a#& !er,aki#& $e#&a# skra, $a# am,eas
Pemeriksaan aal •
Periksa secara visua !"k sii#$er %er'a$a, kere%aka# $a# ke!"c"ra#) Bia air %eri'a% !"c"r ,a$a sum!a%/ sum!a% m!a% 'arus arus $i&a i&a#%i #%i %er$a,a%
kere%aka#
$i,er!aiki0 $i"ver'"u)
$a# *ika *ika 'arus
•
Peri Periks ksa a
seca secara ra
visu visua a
&"re &"resa sa##-
&"resa# ,a$a %a!u#& sii#$er/ !ia &"re &"resa sa# #
%er %era au u
'arus $i"ver'"u)
$aa $aam/ m/
sii sii#$ #$er er
Bl!k silin"er #un$$al% kerin$ K!n#r!l keben$k!kan & 'ermukaan a#as ( Sebab keben$k!kan ) Pa# Pa#as .a#& !ere ere! !i'a# i'a# 1 • 'ea%i#& 2
•
Mis%ar !a*a
+eeer
Ke!e Ke!e#& #&k" k"ka ka# # maks maksim imum um $ii*i#ka# ± 3/45 mm
"ver
.a#& a#&
P!sisi Pen$ukuran
K!n#r!l keben$k!kan & 'ermukaan baah ( •
•
ke!e ke!e#& #&k" k"ka ka# # maks maksim imum um .a#& a#& $ii*i#ka# ± 3/4 mm ke!e ke!e#& #&k" k"ka ka# # .a#& .a#& %er* %er*a$ a$ii a&ak a&ak sui% $i,er!aiki/ %e%a,i !isa $iaksa#aka# ,a$a !e#&ke re,arasi
*en$ukur #abun$ silin"er •
Bersi'ka# kem!ai %a!u#&-%a!u#& sii#$er
•
Ukur $iame%er asi %a!u#& sii#$er $e#&a# mis%ar s"r"#& 6 ,a$a !a&ia# !a7a'0 !a&ia# .a#& %i$ak %erke#a &eseka# ci#ci# %"rak 2
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Pasa#& aa% ,em!aca ,e#&ukur %a!u#& sii#$er ,a$a %a#&kai sam,ai *arum $ia !er&erak ± 3/43 mm) 1i'a% &am!ar !a7a'2)
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Pii' $a# ,asa#&ka# !a%a#& ,e#&ukur0 ci#ci# ,a$a kaki ,e#&ukur $ia/ sesuai $e#&a# !esar $iame%er asi sii#$er) Hasi ,e#&ukura# $e#&a# mis%ar s"r"#& u#%uk ukura# seai# kei,a%a# 5 %am!a'ka# ri#& ,e#am!a' c"#%"'8 U#%uk $iame%er 99 mm &u#aka# !a%a#& 95 mm $i%am!a' ri#& ( mm)
•
Se%ka# $ia i#$ika%"r ,a$a mikr"me%er sesuai $e#&a# $iame%er asi
+N,OR*AS+ •
Pa#*a#& ukura# !a%a#& ,e#&ukur %a!u#& sii#$er .a#& $i,asa#& %i$ak sesuai $e#&a# 'ar&a se'arus#.a/ maka ,eru $ikai!rasi0$ise% a&i 1i'a% &am!ar2)
•
Se% 0 kai!rasi mikr"me%er ,a$a ukura# .a#& sesuai 13/ (5/ 53/ 95/ a%au 433 mm2 $e#&a# memakai aa% ,e#&u!a' .a#& a$a ,a$a k"%ak mikr"me%er)Jika su$a' ,as/ se%e mikr"me%er ,a$a ukura# $iame%er asi 1i'a% &am!ar2/ ,"sisi ,e#&ukur %a!u#& sii#$er $a# mikr"me%er 'arus %e&ak urus 1 su,a.a 'asi akura%2
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Se%0kai!rasi $ia ,e#&ukur %a!u#& sii#$er $e#&a# memu%ar ruma' 1$ari ,as%ik !a&ia# uar2 ,a$a ,"sisi #" 132/ *ika su$a' maka aa% sia, $i&u#aka# u#%uk ,e#&ukura#)
•
Su,a.a Su,a.a 'asi 'asi ,em!ac ,em!acaa aa# # 'asi 'asi ,e#&u ,e#&ukur kura# a# !e#ar !e#ar// 'arus 'arus $i,er' $i,er'a%i a%ika ka# # ara' ara' ,u%ara# *arum/ *ika aa% ,e#&ukur %a!u#& sii#$er $ie,as $ari mikr"me%er/ maka *arum aka# !er&eser $ari ,"sisi #" ke ,"sisi .a#& !aru 1.a#& e!i' !esar #iai#.a2) Pa$a 7ak%u ,e#&ukura# %a!u#& sii#$er ,"sisi aa% ,e#&ukur *u&a 'arus %e&ak urus0a%au &eser-&eser aa% ,e#&ukur $a# $a,a%ka# 'asi .a#& %erkeci)
HAS+L PENG-K-RAN •
Di%e#%uka# e%ak *arum $e#&a# ,"sisi #"/ *ika *arum * arum !er&erak ,a$a ,"sisi se!eum #"0sera%us maka 'asi ,e#&ukura# ,as%i kura#& $ari $iame%er asi/ $a# se!aik#.a)
Pen$ukuran #abun$ silin"er P!sisi 'en$ukuran Y
Y
Ara'
sum!u
,"r"s
e#&k"
1mema#*a#&2
X X
Ara' 633 %er'a$a, sum!u ,"r"s e#&k" 1mei#%a#&2
Ba$ianba$ian 'en$ukuran A7a a#&ka' a#&ka' ci#ci# %"rak
4) ATAS/ se$ik se$iki% i% ke !a7a' !a7a' a7a a7a a#&ka' ci#ci# %"rak
() TENGAH TENGAH// $i %e#&a' %e#&a' a# a#&ka &ka' ' ci#ci# ci#ci# %"rak :) BA;A BA;AH/ H/ se$ik se$iki% i% ke a%as a%as ak'i ak'irr a#&ka' ci#ci# %"rak) Ak'ir a#&ka' ci#ci# ci#ci# %"rak) Diame%er asi)
+N,OR*AS+ Ke%irus Ke%irusa# a# a$aa' a$aa' seisi seisi' ' 'asi 'asi ,e#&uk ,e#&ukura ura# # %er!es %er!esar ar $ikura $ikura#& #&ii 'asi 'asi ,e#&uk ,e#&ukura ura# # %erkeci $ari sa%u ,"sisi ,e#&ukura# X a%au < sa*a) ="#%"'8 X4 > X(/ X( - X:/ X: > X(/ X( > X4) <4 > <(/ <( - <:/ <: > <(/ <( > <4) Ke"#*"#&a#0ke"vaa# a$aa' seisi' ? 'asi ,e#&ukura# $ari ( ,"sisi ,e#&ukura# X $a# < ,a$a : ,"sisi) ="#%"'8 X4 > <4/ X( > <(/ X: > <: a%au se!aik#.a
TABEL HAS+L PENG-K-RAN Sii#$er
P"sisi ,e#&ukura#
N"
X mema#*a#& Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :)
4 ( : 5
< mei#%a#& Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :) Ukura# mis%ar s"r"#& Diame%er asi 8 @@) 4) () :)
Ba%as ke%irusa#0ke"#*"#&a# maks ± 3/3C > 3/43 mm) Ke%irusa# maks
8
mi# 8
Ke"#*"#&a# maks 8
mi# 8
Kesim,ua#8
Pemeriksaa# ara' sem,r"%a# ,a$a saura# "i ,e#$i#&i# %"rak secara visua) N"se saura# "i ,e#$i#&i# 'arus me#&ara' ke !a&ia# a%as %"rak) 1K'usus u#%uk m"%"r $iese2)
/!n#!h keausan De#&a# !er%am!a'#.a umur ,emakaia# sua%u m"%"r aka# me#&aki!a%ka# keausa# ,a$a ,ermukaa# u#cur %a!u#& sii#$er) Se'i#&&a rua#& k"m,resi %i$ak ra,a% a&i) •
Keausa Keausa# # %er*a$ %er*a$ii ,a$a ,a$a aur aur ci#ci# ci#ci#// maki maki# # ke !a7a !a7a' ' keau keausa sa# # maki maki# # keci/ !iasa#.a %er*a$i ,a$a m"%"r ,a$a a#&ka' ,a#*a#&)
•
Keausa#
%er*a$i
,a$a
!i$a#&
%e#&a' .a#& ,ai#& $aam •
Biasa#.a
%er*a$i
a#&ka' ,e#$ek)
,a$a
m"%"r
Sebabsebab keausan se0ara umum •
Geseka# ci#ci# %"rak ,a$a ,ermukaa# u#cur %a!u#& sii#$er
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Keausa# $i'i%u#& ≈ 3/334 > 3/33: mm %ia, 4333 km
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K"#$e#sasi air $i $aam sii#$er kara%a#
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Ti#&ka% ,eumasa#0 *e#is mi#.ak ,eumas .a#& saa'
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Je#is !a'a# !akar 1 a$a !a&ia#-!a&ia# .a#& k"r"si 2)
+n!rmasi #ambahan ) 1. Pemb!n$ka Pemb!n$karan ran ke'ala ke'ala silin"er silin"er 'a"a 'a"a m!#!r m!#!r silin"er silin"er jenis jenis basah. basah. •
Se%ea' !au%-!au% ke,aa sii#$er e,as/ ,u%ar ke,aa sii#$er se'i#&&a ke,aa sii#$er !e!as0 %i$ak meeka% $e#&a# %a!u#& sii#$er)
•
A#&ka% ke,aa sii#$er sii#$er
Pasa#&
•
,a%
,e#&ama#
u#%uk
me#&'i#$arka# %ere,as#.a %a!u#& sii#$er)
•
Bersi' Bersi'ka# ka# ,ermuk ,ermukaa aa# # !"k !"k sii#$ sii#$er er $a# ukura ukura' ' %i#&&i %i#&&i ,ermuk ,ermukaa# aa# %a!u#& %a!u#& sii#$er $e#&a# ,ermukaa# !"k sii#$er
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Jika %i#&&i ,ermukaa# sesuai $e#&a# ke%e#%ua#/ ,asa#& ,aki#& .a#& !aru $a# ke,aa sii#$er)
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Jika %i#&&i ,ermukaa# %i$ak sesuai ke%e#%ua#/ ,er!aiki $u$uka# $ari %a!u#& sii sii#$ #$er er $e#& $e#&a# a# me#a me#am! m!a' a' a%au a%au me#& me#&ur ura# a#&i &i ri#& ri#&0s 0ski kim m 1i' 1i'a% a% 'aa 'aama ma# # !eriku%#.a2
2. Pen$$an#ia Pen$$an#ian n sil % rin$ #abun$ #abun$ silin"er silin"er basah basah •
Keuarka# %a!u#& sii#$er $ari !"k m"%"r/ $e#&a# cara me#$"r"#& $ari !a&ia# !a7a' !"k sii#$er) Kaau %erasa !era%/ ,er&u#aka# aa% ,ee,as %a!u#& sii#$er)
Ta!u#& sii#$er
•
Bersi'ka# %a!u#& sii#$er $a# ukur $iame%er %a!u#& sii#$er
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Bersi'ka# $u$uka# si-si ,a$a %a!u#& sii#$er $a# !"k sii#$er)
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Pasa#& %a!u#& sii#$er ke !"k sii#$er %a#,a si
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Pasa#& ,a% ,e#&ama# $a# keraska# !au% $e#&a# m"me# ,e#&erasa#
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Ukur %i#&&i ,ermukaa# %a!u#& sii#$er $ari ,ermukaa# !"k sii#$er) Pe#&ukura# $iaksa#aka# ,a$a em,a% ,"sisi)
Posisi pengukuran
Blok silinder
Tabung Tabung silinder
Ti#&&i .a#& $ii*i#ka# 3/3C > 3/4( mm Per!e$aa# %i#&&i ,e#&ukura# .a#& $ii*i#ka# 3/3( mm
Ring
•
Le,as a&i %a!u#& sii#$er $ari !"k sii#$er
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Pii' ri#& .a#& sesuai $e#&a# s,esiikasi
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Pasa#& %a!u#& sii#$er $e#&a# ri#& .a#& $i,ii'
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Ukur %i#&&i ,ermukaa# %a!u#& sii#$er
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U#%uk me#$a,a%ka# %i#&&i ,ermukaa# %a!u#& .a#& $ii#&i#ka#/ $iaksa#aka# $e#&a# cara ri#& .a#& sesuai)
12
12
Lu!a#& ,ee,as
Kemun$kinan Perbaikan •
Permukaan a#as bl!k silin"er Per!aika# $iakuka# $e#&a# cara me#&&eri#$a) Te!a ,e#&&eri#$aa# maksimum 3/(3 mm Paka Pakaii ,aki ,aki#& #& sii sii#$ #$er er !aru !aru $e#& $e#&a# a# %a!e %a!e .a#& .a#& sesu sesuai ai a&ar a&ar %i$ak %i$ak meru meru!a !a' ' ,er!a#$i#&a# k"m,resi)
•
Permukaan lun0ur silin"er Per!aika# $iakuka# $e#&a# cara mem!"r ua#&) Ba#.ak#.a s%e, ,er!aika# s%e, Variasi ,em!esara# $iame%er masi#&-masi#& s%e, ,er!aika# a$aa' 3/(5 mm) Pakai %"rak F"versie $e#&a# $iame%er .a#& sesuai u#%uk masi#&-masi#& s%e, ,er!aika# %erse!u%)
•
Ke#eran$an Pa$a Pa$a %a!u#& %a!u#& sii#$ sii#$er er keri#& keri#& !ia !ia keaus keausa# a# mee!i mee!i'i 'i !a%as !a%as maksim maksimum/ um/ %a!u#& %a!u#& sii#$er $i&a#%i !aru $a# ,akai a&i %"rak s%a#$ar%) Pemasa#&a# %a!u#& sii#$er keri#& $e#&a# sis%em ,res/ %eka#a# ,e#&e,resa# (3 > :3 k&)
LE*BAR +N,OR*AS+
*O*EN PENGEN/ANGAN BA-T STANAR 64444>3(3
N"m"r Par% Pa#*a#& !au%8 (3 mm Diame%er $asar $ari uir8 mm Ta#$a ke,aa !au%
Pe#*easa# $ari %a#$a ke,aa !au% $a,a% $ii'a% ,a$a %a!e !eriku%)
*O*EN SPES+,+KAS+ BA-T 4 BA-T STANAR Keas
Diame%er $a $asar
Pi% mm
mm C 43 43 4( 4( 4( 4: 4 4 4 4
4 4/(5 4/(5 4/5 4/(5 1ISO2 4/5 4/95 4/5 4/5 ( 4/5 (
3/ > 3/9 4/3 > 4/ 4/6 > :/4 4/C > :/3 :/5 > 5/5 :/5 > 5/5 :/3 > 5/3 /5 > 9/3 5/3 > C/3 /9 > 9/9 9/5 > 44/3 9/4 > 43/
5T
C 43 43 4( 4( 4( 4: 4 4 4 4
4 4/(5 4/(5 4/5 4/(5 1ISO2 4/5 4/95 4/5 4/5 ( 4/5 (
3/ > 3/6 4/5 > (/( :/3 > /5 (/9 > /( 5/3 > C/3 5/3 > 9/3 /C > /C /5 > 6/3 9/5 > 44/3 9/3 > 43/5 4(/3 > 49/3 44/5 > 4/5
T
C 43
4 4/(5 4/(5
3/ > 3/6 4/5 > (/( :/3 > /5
T
Limi% m"me#
1k&-m2
9T
43 4( 4( 4(
4/5 4/(5 1ISO2 4/5 4/95
(/9 > /( 5/3 > C/3 5/3 > 9/3 /3 > /C
C 43 43 4( 4( 4( 4: 4 4 4 4
4 4/(5 4/(5 4/5 4/(5 1ISO2 4/5 4/95 4/5 4/5 ( 4/5 (
3/C > 4/( (/3 > :/3 /3 > 5/5 :/9 > 5/( 9/5 > 43/5 9/3 > 6/3 /3 > C/5 C/3 > 4(/3 43/3 > 45/3 6/5 > 4/3 45/3 > (:/3 4/3 > ((/3
/a#a#an) S,esiikasi m"me# i#i 'a#.a !eraku u#%uk uir > uir $ari !a'a# !a*a) S,esiikasi m"me# i#i %i$ak !eraku u#%uk uir > uir !a'a# .a#& ai# a%au a,a!ia !a&ia# %em,a% ,e#&e#ca#&a# $i,e#&aru'i ,a#as a%au &e%ara#)
