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(c)
Straighten the tappet guide pin lock plate, push in the tap-
pet slightly, pull off the guide pin _ using a needle nose
pliers and take out the tappet.
(d)
Remove the spring and upper seat.
(e)
Remove the pinion.
(f)
Draw out the plunger barrel upward from the pump housing.
Keep
the
removed
plunger
barrels
and
plungers
in
sets.
(Never mix plunger and barrel assemblies.)
(g)
Remove the cotter pin, washer, return spring and smoke set,
and pullout the control rack.
Examination
(1)
Delivery Valve Seat
Check the contact surface of the deli-
very valve seat,
and
if not showing
good
contact,
replace
the
delivery
valve.
The delivery valve should show
a
slight
resistance
when
being
withdrawn from the valve body when the
other
hole
is closed off wi th one
IS
finger.
(2)
Plunger Barrel
Check the plunger for seizure, damage
and rust.
Also check that the plunger
slides smoothly when it is lubricated
with diesel fuel and inserted into the
barrel.
If the plunger is found not
to
slide
smoothly
into
the
barrel,
replace the assembly.
The repair of
the plunger is not permitted: it must
be replaced.
71
Delivery VIIlve
Ba,rel
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