Engine. - TM-55-4920-405-13-P0066

TM 55-4920-405-13&P

(12)

(2)

Fluid Flow Indicator. To remove FLOW

High-Temperature Safety Switch. To re-

INDICATOR GPM (11, figure 2-1), discon-

move high-temperature safety switch (2),

nect it from the hydraulic pump. Then,

proceed as follows:

pull it back until the end clears the control

panel, and remove it.

(a) Remove the cylinder head shroud on

the number 2 and 4 spark plug side of

P r e s s u r e Gages. To remove FLUID

(13)

the engine.

PRESSURE GAGE (5, figure 2-1) or SUC-

(b) Pull the wire assembly off the termi-

TION PRESSURE GAGE (7), proceed as

nal of the high-temperature safety

follows:

switch.

attaches the high-temperature safety

(a) Disconnect the hydraulic tubing at the

rear of the gage.

switch, and remove the switch.

(b) Remove the hardware that attaches

(d) Replace the defective switch.

the gage to the control panel. Pull the

(3)

Spark Plugs. To remove spark plugs (1),

gage out of the control panel.

proceed as follows:

(14)

Temperature Gage. To remove FLUID

Remove the locknuts that attach the

(a)

TEMP GAGE (9, figure 2-1), proceed as

ignition wires to the spark plugs.

follows:

Disconnect the ignition wires.

Using a spark plug wrench, remove

(b)

the spark plugs from the cylinder

(a)

Remove sensing bulb from the hydrau-

lic manifold.

head.

Clean and gap the spark plugs, or re-

(c)

Remove the hardware that attaches the

(b)

place as required. The proper gap is

gage to the control panel. Pull the

0.030 inch.

gage out of the control panel.

(c)

Replace the defective gage.

(4)

Magneto. To remove magneto (1, figure

Engine.

(See figure 4-8.)

(4- 5), proceed as follows:

(1) Shrouding. To remove the shrouding from

(a) Loosen the nuts that secure the igni-

the e n g i n e , p r o c e e d a s f o l l o w s : -

tion wires to the magneto and discon-

nect the ignition wires. Tag each

Remove the lock nut from the top of

ignition wire as you disconnect it so

(a)

each of the four spark plugs. Discon-

that you will know where to reconnect

nect the ignition wires from the spark

plugs .

(b) Remove the screw and washer that at-

The four ignition wires are secured

(b)

tach the ground strap to the magneto,

to the shrouding with clamps, each of

and disconnect the ground strap.

which is attached with a screw and

wire at the top rear of the magneto by

l o c k w a s h e r . Remove these screws

removing one screw.

and lockwashers.

(c)

Remove the screws and lockwashers

(d) Support the magneto so that it will not

that attach cylinder head shrouds (16).

drop when -mounting hardware is re-

Remove the cylinder head shrouds.

moved. Remove the bolts, nuts, and

lockwashers that attach the magneto,

NOTE

and remove the magneto.

(e) Replace the defective magneto.

Screws of different lengths are used to at-

tach the shrouding. As you remove screws,

Oil Filter. The engine uses a cartridge-

(5)

type oil filter. To remove oil filter cart-

note their length and tag them so that you

ridge (7, figure 4-8), unscrew it from oil

can later return the right screw to the

filter base assembly (8). Replace the de-

right location.

fective oil filter cartridge.

(d)

Disconnect the leadwire from high-

temperature safety switch (2).

(6)

Fuel Strainer. To remove fuel strainer

(e)

Remove the screws and lockwashers

(6, figure 4-5), proceed as follows:

that attach rear shroud covers (13).

Remove the rear shroud covers.

Loosen the knurled nut at the bottom

(f)

Remove cylinder heat deflectors (15)

(a)

of the fuel strainer.

and lower cylinder shrouds (14).

Swing the wire bail to one side, and

Remove the screws and lockwashers

(b)

(g)

remove the bowl, gasket, and screen.

that attach flywheel shroud (17). Re-

(c)

Disconnect the inlet fuel line from the

move the flywheel shroud with attach-

fuel strainer.

ed screen.

4-18