Fuel System (Rev 1/97)
94
Delivery Valve Test
c.
Remove your finger from the hole on the bottom of
the delivery valve holder. The delivery valve
should drop until the valve seat rests on the deliv-
ery valve holder.
d. Replace the delivery valve if it does not pass this
test.
Springs
Replace the delivery springs or the plunger springs if they
show any signs of wear or damage.
Plunger Guide Assembly
Clean and inspect the plunger guide. Replace the plunger
guide as an assembly if it shows any of the following:
1. Excessive play between the plunger guide and the roller
pin.
2. Excessive play between the roller and the roller pin.
3. Wear or damage evident on the roller, the roller pin, or
on the sides of the plunger guide.
Fuel Control Rack And Pinions
Replace the fuel control rack if it is bent or damaged, or if
the gear teeth show excessive wear.
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Replace the fuel control pinions if the gear teeth show
excessive wear or damage.
Assembly
NOTE: The steps in this procedure that describe the com-
ponents for an individual cylinder must be performed on
the components of each cylinder.
1. Place the plunger barrel seal in the injection pump
body.
2. Install the plunger barrel. Make sure to align the groove
in the side of the plunger barrel with the pin in injection
pump body.
Plunger Barrel
3. Place the delivery valve assembly and the delivery
valve spring in the injection pump body.
4. Install the delivery valve spring retainer, but tighten it
only hand tight.
5. Install the fuel control rack and position it so the align-
ment marks are visible through the bottom of the injec-
tion pump body.
6. Install the fuel control pinion and make sure the align-
ment mark lines up with the alignment mark on the fuel
control rack.
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