Inspecting Tank Vent - Echo shindaiwa CSG-7410ES Service Manual

CSG-7410ES
EC741S
4-6 Inspecting tank vent
NOTE: Tank vent prevents a vacuum from forming in fuel tank when fuel in fuel tank is being consumed.
When pressure in fuel tank becomes too high, tank vent releases the pressure.
B
5. Apply negative pressure 0.02 MPa (0.2 kgf/cm
6. Tank vent should pass air freely without holding any pressure. If it does not, replace tank vent with new one.
A
F
G
E
H
J
K
a
FUEL SYSTEM
valve
A
D
J
K
Inspection using Pressure / vacuum tester 91149
1. Remove tank vent (A) from rear handle (Refer to
"4-5 Disassembling carburetor, fuel line and tank
vent).
2. Connect Pressure / vacuum tester 91149 (B) to
tank vent (A).
3. Apply pressure approx. 0.05 MPa (0.5 kgf/cm
psi). Make sure pressure is stable in range of 0.01
- 0.04 MPa (0.1 - 0.4 kgf/cm
4. If it is not in the range, gently clean tank vent (A)
with compressed air or replace with new one.
NOTE: Do not disassemble valve in tank vent as-
sembly. Damage to valve will occur.
2
) (3 psi).
Inspection using Pressure tester 897803-30133
If Pressure / vacuum tester 91149 is not available,
tank vent can be inspected with Pressure tester
897803-30133 as follows.
1. Connect tank vent (A) to Pressure tester
897803-30133 (D).
2. Apply pressure approx. 0.05 MPa (0.5 kgf/cm
psi), make sure pressure is stable in range of 0.01
- 0.04 MPa (0.1 - 0.4 kgf/cm
3. If it is not in the range, gently clean tank vent
with compressed air or replace with new one.
NOTE: Do not disassemble valve in tank vent as-
sembly as shown. Damage to valve will occur.
4. Remove wire (E), filter (F) and cap (G) from tank
vent and clean sponge (H).
5. Cut pipe 363011-00210 (J: 7x11x170mm) and
382011-01110 (K: 9x13x350) in approx. 30mm (1
1/4 in) length, and connect them to pressure tester
as shown. Connect tank vent without cap to pipe
as shown.
6. Plug hole (a) with finger and apply pressure 0.2
MPa (0.2 kgf/cm
hold steady.
7. Remove finger from hole (a). Tank vent should
pass air freely without holding any pressure. If it
does not, replace tank vent with new one.
2
) (1.4 - 5.7 psi).
2
) (1.4 - 5.7 psi).
2
) (3 psi). The pressure should
27
2
) (7
2
) (7