ENG
3-25
VALVE
1
2
3
4
5
SCF3180
a
VALVE AND VALVE SPRING REMOVAL
1. Remove:
9
Valve cotter
1
9
Valve spring retainer
2
9
Valve spring
3
9
Valve
4
Remove the parts using the valve
spring compressor
5
.
TIP
Do not compress the spring more than neces-
sary.
VALVE AND VALVE SPRING INSPECTION
1. Measure:
9
Valve stem length
a
9
Valve face diameter
b
Out of specifications
→
Replace.
2. Measure:
9
Valve stem diameter
a
Out of specifications
→
Replace.
Valve stem length:
Intake: 53.0 mm (2.09 in)
Exhaust: 53.2 mm (2.09 in)
Valve face diameter:
Intake: 20.0 mm (0.79 in)
Exhaust: 18.0 mm (0.71 in)
Valve stem diameter:
Standard
Intake: 4.948 – 4.960 mm
(0.1948 – 0.1953 in)
Exhaust: 4.928 – 4.940 mm
(0.1940 – 0.1945 in)
Wear limit
Intake: 4.908 mm (0.19 in)
Exhaust: 4.908 mm (0.19 in)
Valve spring compressor:
YM-01253, 90890-01253
7DK40-03_b 6/12/09 5:50 PM Page 19
Summary of Contents for EF2000iS - Inverter Generator
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