AD Boivin 2002 Snow Hawk, Service Manual

Page: 36 / 173

FUEL SYSTEM 3 - 14
PUMP VERIFICATION
Verify that the fuel pump is in good working order. To do this,
hook a clean plastic tube to the inlet connector. Blow air in and
out of the tube with your mouth. The valve should open when air
is drawn out, and close when air is blown in.
Proceed in the same way with the outlet valve. This valve should
close when air is drawn out, and open when air is blown in.
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NOTICE:
Plug one of the outlet connections with a finger during the
verification of the outlet valve.
To check the vacuum diaphragm and the pump gasket, proceed
in the following way:
Hook a clean plastic tube to the vacuum connector and plug the
aeration hole on the top cover. Blow air in and out of the tube
with your mouth to make sure there are no leaks either in the
diaphragm or in the gasket.
DISMANTLING
Do not dismantle the valves, unless it is necessary to replace
them.
CLEANING AND INSPECTION
Prior to dismantling, the pump should be cleaned thoroughly,
using an all-purpose solvent. The components of the pump
should also be cleaned with an all-purpose solvent and then
dried with compressed air.
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WARNING
The use of highly volatile solvents such as gasoline,
naphtha, benzol, etc., is prohibited since these products
are flammable and explosive.
Verify the condition of the diaphragm. Its surface must not be
punctured or torn, or show any other imperfection. Replace it if
need be.
Clean the top cover filter thoroughly. Replace the filter if
necessary.