Zontes ZT310M 2022, Руководство по обслуживанию

Страница: 22 / 88

Cylinder head parts inspection:
1. Intake and exhaust rocker shaft
a. There is no abnormal wear on the inlet and exhaust rocker arm shafts.
Item Standard value Repair limit value
Intake and exhaust rocker
shaft
diameter
（
a
）
11.973-11.988 mm
（
0.4714-0.4720 in
）
11.942 mm
（
0.4702 in
）
2. Intake rocker arm, exhaust rocker arm
a. The intake rocker arm (mark I) and exhaust rocker arm (mark E) have no abnormal wear.
b. The inlet and exhaust rocker arm rollers rotate smoothly without any abnormal noise.
Item Standard value Repair limit value
Intake rocker arm sub-components inside diameter
（
a
）
12-12.018 mm
（
0.4724-0.4731 in
）
12.033 mm
（
0.4737 in
）
Exhaust rocker arm sub-components inside diameter
（
b
）
12-12.018 mm
（
0.4724-0.4731 in
）
12.033 mm
（
0.4737 in
）
Matching clearance between intake
and exhaust rocker arm and intake
and exhaust rocker arm shaft
Fit clearance
0.012-0.045 mm
（
0.0005-0.0018 in
）
0.08 mm
（
0.0032 in
）
(
Note: The clearance between the inlet and exhaust rocker arm components and the inlet and exhaust rocker
arm shafts is the value obtained by subtracting the outer diameter of the inlet and exhaust rocker arm shafts
from the inner diameter of the inlet and exhaust rocker arm shafts.
)
3. Intake and exhaust valve springs
a. The intake and exhaust springs have no cracks and abnormal wear.
Item Standard value Repair limit value
Intake and exhaust
valve spring
Free length
（
a
）
35.5-36.5 mm
（
1.3976-1.4370 in
）
33.7 mm
（
1.3268 in
）
Exhaust rocker arm
identification
Intake rocker
arm identification
a
a
a
b