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Engine Maintenance General
Clearances and Wear Limits
엔진
정비
일반사항
간극
및
마모
제한치
Section No.
G09200
Rev.
3B
HYUNDAI HEAVY INDUSTRIES CO., LTD
.
Engine & Machinery Division 06.10/YJH
Section
No.
Part
Schematic drawing
Nominal Size
Clearance
Wear and
Repair Limit
Camshaft
bearing
A=179
a = 0.161~0.245
0.3
M25000 Camshaft
Camshaft thrust
bearing
B=109
b = 0.1~0.15
0.2
Intake/exhaust
rocker arm shaft
and bearing
A=25
a = 0.2~0.7
a’ = 0.2~0.7
M21210
Tappet and
tappet guide
B=50
b = 0.025~0.08
0.2
M23000
Valve
operating
mechanism
and tappet
Tappet roller
shaft and
bearing
C=30
D=45
E=26
F=10
c = 0.020~0.066
d = 0.050~0.091
e = 0.15~0.40
f = 0.025~0.066
0.2
Intake valve
(stem part) and
guide
A=16
a = 0.06~0.143
0.3
M21130
Exhaust valve
(stem part) and
guide
A=16
a = 0.08~0.161
0.3
M21210
Guide pin for
yoke
B=20
b = 0.031~0.065
0.2
Intake valve
(face part)
C=6
R1=30
˚
R1=
-0
˚
5’~ 0
˚
4.5
Intake valve
seat
R2=30
˚
R2=
0
˚
~ 0
˚
5’
Exhaust valve
(face part)
E=6
R3=30
˚
R3=
-0
˚
5’~ 0
˚
4.5
M21200
Intake and
exhaust
valve
Exhaust valve
seat
F=0.38
R4=30
˚
R4=
0
˚
~ 0
˚
5’
A
a
B
b