Fuel Pump

TM 55-4920-405-13&P

(d) Carefully unscrew the fuel strainer

If you do have to pry the cylinder head

housing from the pipe nipple that con-

loose, make sure that you do not

score the machined mating faces.

nects it to the fuel pump.

(e) Clean all parts thoroughly. Replace

(f) Clean and repair or replace the

the gasket and any damaged parts.

cylinder head as applicable.

( 1 1 ) Cylinder Block. To remove cylinder

(7) Fuel Pump. To remove fuel pump (5, fig-

block (5), proceed as follows:

ure 4-5), proceed as follows:

(a) Remove the fuel strainer.

(a) Remove the cylinder head and gasket

from the cylinder block that you wish

(b) Disconnect the outlet fuel line.

to remove.

that attach the fuel pump to the fuel

(b) Remove the nuts and lockwashers that

pump adapter. Remove the fuel pump

attach the cylinder block to the crank-

case assembly.

and the fuel pump gasket.

(d) Repair or replace the defective fuel

case assembly. Remove the cylinder

pump.

block gasket.

(d) Clean and repair or replace the

(8)

Carburetor. To remove carburetor (11,

figure 4-5), proceed as follows:

cylinder block as necessary.

(a) Disconnect the fuel lines from the

(12) Flywheel. To remove flywheel (12, fig-

ure 4-8), proceed as follows:

carburetor.

(b)

Disconnect the throttle and choke con-

(a) Remove flywheel shroud (17).

trol cables from the carburetor.

(c)

Hold the carburetor so that it wont

(b) Remove the flywheel locknut and

washer.

drop when mounting hardware is re-

moved. Remove the mounting bolts

and hit the end of the crankshaft with

and lockwashers, and remove the car-

a soft hammer. The flywheel will

buretor and the carburetor gasket.

slide off the taper of the crankshaft.

(d)

Repair or replace the carburetor as

Remove the flywheel and key.

applicable.

CAUTI--N-

---- O

( 9 ) Governor. To remove governor (23, fig-

ure 4-8), proceed as follows:

Do not use a hard hammer to hit the end

of the crankshaft. If you do, you may

Remove the governor spring from the

(a)

ruin the crankshaft and bearings.

lever. Make a note of the lever hole

from which you disconnected the spring.

(d) Clean and repair or replace the fly-

Disconnect the governor oil line.

(b)

wheel as necessary.

(c)

Remove the cotter pin in the control

rod to the carburetor, and disconnect

Alternator. To remove alternator stator

(13)

the control rod.

(11, figure 4-8), proceed as follows:

(d)

Disconnect the tachometer cable from

the tachometer adapter.

Remove flywheel shroud (17).

(a)

(e)

Remove the screws and lockwashers

(b)

Remove flywheel (12). The alternator

that attach the governor to the front

rotor is part of the flywheel.

plate of the engine. Remove the

(c)

Squeeze the outer ends of the connector

governor and governor gasket.

plugs on the alternator rotor wiring,

(f)

Repair or replace the governor as

and pull the plugs apart.

applicable.

(d)

Disconnect the electrical leadwire

from AMMETER (3, figure 2-1).

(10) Cylinder Head. To remove cylinder head

(3, figure 4-8), proceed as follows:

(e)

Remove the attaching hardware, and

remove the voltage regulator and

rectifier modules.

Remove spark plugs.

(a)

(f)

Remove the attaching hardware, and

Remove shrouding.

(b)

remove the alternator stator.

(c)

Remove the high-temperature safety

Repair the alternator, or replace de-

s w i t c h . (Do this only if that cylinder

(g)

fective parts as needed.

head to which the switch is attached is

to be removed.)

(d) Remove the head bolts and washers

Engine Gear Cover. To remove engine

(14)

that attach the cylinder head to the

gear cover (10, figure 4-8), proceed as

cylinder block.

follows:

(e) Remove the cylinder head and cylinder

head gasket. You may have to insert

(a) Remove flywheel shroud (17).

a flat tool and pry the cylinder head

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