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TM 5-4210-220-12
4-23. FUEL SYSTEM AND AIR INTAKE - Continued
4-23.5 Fuel Pump - Continued
(24)
Support the body on wooden blocks. Insert the pilot of the installer in the pump body, so the seal starts
straight into the pump flange.
(25)
Drive the seal into the body until it bottoms.
(26)
Remove installer, slide the adaptor J1508-9 over the pilot. The shorter snout should be towards the
handle.
(27)
Slide the second seal onto the pilot with the spring side toward the handle.
(28)
Insert the pilot into the pump body and drive the seal until the shoulder of the adaptor just contacts the
pump body.
(29)
Clamp pump body, flange to flange, between the soft jaws of a bench vise. Pump valve cavity must be
up.
(30)
Lubricate the outside of the relief valve. Place it in the valve cavity, hollow end up. Insert the spring
inside of the valve seat, and pin inside the spring.
(31)
Fit a new gasket over the valve plug. Place plug over the spring and thread it into the pump body. Tighten
to 18 ft lb (24 Nm).
(32)
Push the fuel pump drive gear over the end of the non-squared end of the drive shaft. The slot in the gear
must face the non-squared end of the shaft. (Do not push on from squared end, otherwise lip seal area of
shaft will be damaged).
(33)
Press the drive gear beyond the gear retaining ball detent. Place the gear retaining ball in the detent and
press gear back until the ball contacts the end of the slot in the gear.
(34)
Mount fuel pump in holding fixture J1508-10. Lubricate the pump shaft with engine oil and insert the
square end of the shaft into the opening on the gear side of the pump body. Push the shaft through the oil
seals carefully until the gear is in the pump cavity.
4-404
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