TM 5-3810-300-24&P-3
Fuel Pump 2.2
pump body. Tighten the 1/2"-20 plug to 18-24 Ib-ft (24-33 Nm)
vegetable shortening, then install the oil seals in the pump
body as follows:
3. Install the fuel pump drive gear over the end of the drive
a. Place the inner oil seal on the pilot of the installer
shaft which is not squared (so the slot in the gear will face the
handle J 1508-8 so that the lip of the seal will face in
plain end of the shaft). This operation is very important,
the same direction as the original seal which was
otherwise fine score marks caused by pressing the gear into
removed.
position from the square end of the shaft may cause rapid
wear of the oil seals. Press the gear beyond the gear retaining
b. With the pump body supported on wood blocks (Fig.
ball detent. Then place the ball in the detent and press the
7), insert the pilot of the installer handle in the pump
gear back until the end of the slot contacts the ball.
body so the seal starts straight into the pump flange.
Then drive the seal in until it bottoms.
4. Lubricate the pump shaft and insert the square end of the
shaft into the opening at the gear side of the pump body and
c. Place the shorter end of the adapter J 1508-9 over
through the oil seals as shown in Fig. 9.
the pilot and against the shoulder of the installer
handle. Place the outer oil seal on the pilot of the
5. Place the driven shaft and gear assembly in the pump
installer handle with the lip of the seal facing the
body.
adapter. Then insert the pilot of the installer handle
into the pump body and drive the seal in (Fig. 8) until
the shoulder of the adapter contacts the pump body.
CAUTION:
The driven gear must be
Thus the oil seals will be positioned so that the space
centered on the shaft to give proper end
between them will correspond with the drain holes
clearance. Also, the chamfered end of the
located in the bottom of the pump body.
gear teeth of the production gear must face
the pump body. If a service replacement
2. Clamp the pump body in a bench vise (equipped with soft
gear with a slot is used, the slot must face
jaws) with the valve cavity up. Lubricate the outside diameter
toward the pump cover.
of the valve and place it in the cavity with the hollow end up.
Insert the spring inside of the valve and the pin inside of the
6. Lubricate the gears and shafts with clean engine oil.
spring. With a new gasket in place next to the head of the
valve plug, place the plug over the spring and thread it into the
7. Apply a thin coat of quality sealant on the face of the pump
cover outside of the gear pocket area. Then
Fig. 7 Installing Inner Oil Sea
Fig. 8 - Installing Outer Oil Seal
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