5) Testing
(1) Suction capacity test
Connect one end of a hose to the inlet
side of the feed pump and immerse the
other end of it into the fuel tank as illus-
trated.
Hold the feed pump in position about
1m above the level of fuel in the fuel
tank.
Operate the tappet at the rate of 100
rpm and check to see if fuel is drawn in
and delivered for 40 seconds or so.
(2) Delivery test
Make a test with the feed pump mounted
on a pump tester as illustrated. Operate
the pump at the rate of 1,000 rpm and
check to see if the pump delivery is more
than 405 cc/15 seconds.
(3) Sealing test
Plug up the delivery port on the feed
pump and apply compressed air of 2
kg/cm
2
into the inlet side.
Submerge the feed pump in a container of
diesel fuel and check for air leak.
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