DETROIT DIESEL 53
FUEL PUMP 2.2
Fig. 5 Fuel Pump Details and Relative Location of Parts ( Right Hand Pump Shown)
with the hollow end up. Insert the spring inside of the valve and the pin
inside of the 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 pump
body. Tighten the plug.
3. Install the pump drive gear over the end of the drive shaft which is
not squared (so the slot in the gear will face the plain end of the shaft).
This operation is very important, otherwise fine score marks caused by
pressing the gear into position from the square end of the shaft may
cause rapid wear of the oil seals. Press the gear beyond the gear
retaining ball detent. Then, place the ball in the detent and press the
gear back until the end of the slot contacts the ball.
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 through the oil seals
as shown in Fig. 8.
5. Place the driven shaft and gear assembly in the pump body.
Fig. 6. Installing Inner Oil Seal
CAUTION: The driven gear must be centered on the shaft to give proper end
clearance. Also, the chamfered end of the gear teeth of the production gear must
face the pump body. If a service replacement gear with a slot is used, the slot
must face toward the pump cover
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