Gear Cover - TM-5-4320-258-340048

TM 5-4320-258-34

Reassembly and Installation.

Cleaning and Inspection.

(1) Refer to figure 4-8 and reassemble the

(1) Discard and replace all gaskets.

engine oil pump. Check that the drive shaft turns easily

(2) Clean all parts with cleaning solvent

without binding when assembled.

(FED. Spec. P-D-680); dry thoroughly.

(2) Position the washer (3, fig. 4-8) and oil

(3) Inspect the strainer screen for holes,

pump on the main bearing so that the drive gear

clogging, and distortion; replace a damaged strainer

engages the toothed portion of the camshaft; secure the

screen.

pump with a nut (1) and lock washer (2).

(4) Inspect the gears for chipped or broken

(3) Install the oil pan (para 4-6).

teeth, scoring, and wear. With the gears mounted on

4-8.

Gear Cover

their respective shafts, there shall be no contact

a. Removal and Disassembly.

between the gears and the pump body. Clearance

between gears shall be 0.001 inch minimum to 0.003

(1) Remove the governor from the engine

inch maximum. Replace parts if they fail to meet these

(TM 5-4320-258-12).

requirements.

(2) Remove the water pump from the

(5) With the gears positioned in the body

engine TM 5-4320-258-12).

and a new gasket positioned on the face of the pump

(3) Remove the starting jaw (1, fig. 4-14)

body, place a straightedge across the open face of the

and collar (2) that secure the pulley (3) to the front end

body and, with a feeler gage, check the possible end

of the crankshaft; remove the pulley and key (4) from

play of the gears. It shall be 0.0015 to 0.006 inch. If

the crankshaft.

clearance is not within this range, replace parts as

(4) Remove the cap screws (1, 3, 6, 8, and

required.

11, fig. 4-9), assembled washer screw (5), nuts (10, 13,

(6) Check the fit of the drive shaft in the

and 14), lock washers (2, 9, 12, and 15), and copper

pump body. There shall be no excessive play. Replace

washers (4 and 7) that secure the gear cover (17) to the

the body bushing if play is excessive.

engine block; remove the gear cover from the engine

(7) Inspect the gear pockets of the body. If

block.

they are scored, or excessively worn, replace the pump.

(5) Press the seal (16) from the gear cover.

(8) Inspect all remaining parts for cracks,

distortion, damaged threads, wear, and other damage;

replace damaged parts.

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