FU-46 FUEL SYSTEM - Injection Pump
INSPECTION OF INJECTION PUMP
COMPONENTS
NOTICE: Do not touch the sliding surfaces of the
pump plunger and delivery valves.
1. INSPECT DELIVERY VALVES
(IPZandiHZ)
(a) Pull up the valve and close the hole at the valve seat
bottom end with your thumb.
When the valve is released, it should sink down
quickly and stop at the position where the relief ring
closes the valve seat hole.
(b) Close the hole at the valve seat bottom end with your
thumb.
Insert the valve into the valve seat and press down
with your finger. When your finger is released, the
valve should rise back to its original position.
(c) Remove your thumb from the valve seat hole.
The valve should close completely by its own weight.
If operation is not as specified, replace the valve as a set.
HINT: Before using a new valve set, wash off the rust
prevention compound with light oil or gasoline. Then
re-wash with diesel fuel and perform the above tests.
(1HD-T)
Pull up the valve. When the valve is released, it should sink
down quickly.
If operation is not as specified, replace the valve as a set.
HINT: Before using a new valve set, wash off the rust
prevention compound with light oil or gasoline. Then
re-wash with diesel fuel and perform the above tests.
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