PUMP ASSEMBLY - TM-5-4320-273-140039

TM 5-4320-273-14

Table 3-2. Troubleshooting -- Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE -- Continued

Step 2. Check for a dirty air cleaner element -- continued.

CAUTION

Do not use gasoline, kerosene or solvent to clean element; do not oil the

element.

Install the filter element (6) in air cleaner body and secure with wing nut (5). Install baffle (4) in dust cap.

Install vacuator valve (3) on dust cap. Install dust cap (2) on air cleaner body and secure with clamp assem-

bly (l).

PUMP ASSEMBLY

1. PUMP FAILS TO PRIME.

Check for inefficient priming liquid in pump.

Step 1.

Remove the primer fill cup and check for sufficient priming liquid. If priming liquid level is low, do the

followinng:

Make sure the drain valve at the bottom of the housing is closed.

Fill the pump housing to the level of the cap. Install primer fill cap.

WARNING

After removing the priming cap and filling the pump casing with the product to be

pumped, check the snap-in gasket in the cap to be sure that it is present and that it is

serviceable (no dents; cuts, abrasions). Remove and replace as necessary.

When the casing has been filled, place the cap on the male quick disconnect adapter

and raise the cam levers on the cap to the fully locked (vertical) position.

Bind the cap cam levers together in the locked position with soft wire or heavy twine in

order to eliminate any possibility of their release due to vibration. This procedure

must be followed each time the pumping assembly is primed.

Step 2. Check for loose connection on suction side of pump.

Check gaskets in suction hoses.

Remove suction hoses from the pump assembly by disconnecting the quick-disconnect fittings.

Remove gaskets from hose couplings and inspect them for cracks or any sign of wear. If gaskets are found to

be bad, replace them.

Check for clogged suction strainer.

Step 3.

Service auction strainer.

Step 4. Check pump for air or vapor block.

Make sure the air vent discharge line is open.

Section IV. MAINTENANCE PROCEDURES

3-8. Engine.

operating conditions. U rider extreme dusty con-

ditions, replace oil filter element at every oil change.

Operator/crew maintenance of the engine consists

To change the filter element, the filter assembly does

primarily of the following procedures:

not have to be removed, proceed as follows:

a. Changing Engine Oil. You must change the oil at

least every 100 hours of engine operation.

(1) Remove shoulder bolt (1, fig. 3-5) and remove

b. Servicing Oil Filter. You should change the oil

the flat washer (2), filter cover (3), spring (4), and

filter element every 100 hours under normal

gasket (5).

Change 1 3-9