Figure 3-29.Fuel injeto metering,from no-load to full load.

TM 10-3930-634-34

and the cover for scratches, nicks, burrs or other

f. Inspection.

damages which may result in pressure leaks. The

(1) Discard oil seals.

mating surfaces must be flat and smooth and fit tight-

(2) Inspect the pump gear teeth for scoring, chip-

ly together. Replace the cover or body as necessary.

ing, or wear. Inspect the ball slot in the drive gear for

(5) The relief valve must be free from score marks

wear. If any of these conditions are found, replace the

and burrs. If the relief valve is scored and cannot be

damaged or worn parts.

cleaned up with fine emery cloth or crocus cloth it

(3) Inspect the drive and driven shafts for scoring

must be replaced.

or wear. Replace as necessary. The driven shaft is serv-

g. Reassembly.

iced as gear and shaft assembly only.

(1) Install inner oil seal in pump body as shown in

(4) Inspect the mating surfaces of the pump body

(2) Install outer oil seal as shown in figure 3-57.

(3) Clamp the pump body (5, fig. 3-54) in a bench

vise (equipped with soft jaws) with the relief valve

cavity up. Lubricate the outside diameter of the relief

valve (20) and place the valve in the cavity, hollow end

up. Insert the spring (18) inside the valve and the pin

(19) into the spring. With the gasket (17) in place, next

to the head of the valve plug (16), place the plug over

the spring and thread it into the pump body.

(4) Lubricate the pump shaft (11) and insert the

square end of the shaft into the opening at the gear

side of the pump body and through the two oil seals.

(5) Place the drive gear shaft (10) into the pump

body with the chamfered end of the gear teeth facing

the pump body,

(6) Lubricate the gears and shafts with clean

engine oil.

(7) Apply a thin coat of sealer on the face of the

pump cover outside of the gear pocket area, then place

3-33