JAC HFC4DA1-2C, Руководство по обслуживанию

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Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
13
Section VI Main Fitting Clearances and Allowable Wear Limits of Engine
No. Name Standard Size (mm)
Fitting
nature
Assembly
Clearance for
New Engine
(mm)
Wear Limit
(mm)
1
Contact width between
valve and seat ring
Intake valve 1.7 2.2
Exhaust valve 2 2.5
2
Valve sinkage
Intake valve 0.73 1.28
Exhaust valve 0.71 1.2
3 Backlash 0.05-0.13 0.3
4
Axial run-out clearance of
idler gear A
0.07 0.2
5
Outside diameter of tappet
010 . 0
028 . 0
13
−
−
Φ
Clearance 0.01
～
0.046 0.10
Tappet bore
018 . 0
0
13
+
Φ
6 Radial run-out of push rod 0.3
7 Deflection of rockshaft 0.3
8
Outside diameter of
rockshaft
0
02 . 0
19
−
Φ
Clearance 0.01
～
0.05 0.20
Rocker arm bore
03 . 0
01 . 0
19
+
+
Φ
9
Rod diameter of intake
valve
039 . 0
054 . 0
8
−
−
Φ
Clearance 0.039 ～ 0.071 0.20
Valve guide bore
017 . 0
0
8
+
Φ
10
Rod diameter of exhaust
valve
064 . 0
079 . 0
8
−
−
Φ
Clearance 0.064
～
0.096 0.25
Valve guide bore
017 . 0
0
8
+
Φ
11
Free height of valve spring 48
Perpendicularity of valve
spring
Φ 1.4
12
Outside diameter of idler
gear A shaft
025 . 0
055 . 0
55
−
−
Φ
Clearance 0.025
～
0.080 0.2
Inside diameter of idler gear
A bearing
03 . 0
0
55
+
Φ
13 Cylinder sleeve bore
065 . 0
020 . 0
93
+
+
Φ