ALIGNMENT.

TM 55-4920-405-13&P

(4)

If the gap is not right, loosen the locking

(a)

With the wheel removed, slide the

screws on the contact plate just enough

brake drum over the axle spindle and

to let you move the contact plate.

brake assembly.

(5)

Insert a small screwdriver into the adjust-

(b)

Insert the bearing.

ing slot at the bottom of the contact plate.

(c)

Install the washer and castellated

Move the plate with the screwdriver until

locknut.

you get the right gap.

(d)

Tighten the locknut until the brake

(6)

Tighten the locking screws. Make sure

drum turns with a slight bind.

that you do not disturb the position of the

(e)

Back the locknut off just until the next

contact plate.

cotter pin hole in the spindle is lined

Recheck the gap. Readjust it if it is not

(7)

up with the hole in the locknut.

0.015 inch.

(f)

Install the cotter pin.

Install the end cover on the magneto.

(2) Tire and Tube. To install a tire and tube,

proceed as follows:

c . G o v e r n o r . The control rod between the gov-

ernor and the carburetor must be adjusted to the

Place deflated tube (3, figure 3-6) in

(a)

correct length. Make this adjustment as follows:

tire (4).

Install wheel halves (5 and 11). You

(b)

(1)

Remove the cotter pin and washer from

may have to lubricate the rim sur-

the end of the control rod at the governor.

faces in order to slide the tire onto

(2)

Disconnect the control rod from the lever

the wheel halves.

on the governor.

(c)

Using bolts (10), washers (9), and nuts

Push the control rod toward the carburetor

(3)

(8), fasten the wheel halves together.

as far as it will go. The bent end of the

(d)

Install the assembled tire and wheel

control rod should align with the hole in

over the axle spindle, and install lug

the carburetor lever. If it does not. screw

nuts (1) and washers (2).

the control rod into or out of the swivel

(e)

Inflate tube (3) to remove internal

block on the carburetor lever until you get

wrinkles and creases. Then let out

the right alignment.

the air.

(4)

Connect the control rod to the governor

(f)

Install valve stem (7). Inflate the tire

lever. Install the washer and cotter pin

to 60 psi. Install valve cap (6).

at the end of the control rod.

4-7. ALIGNMENT. Adjust the engine components

as follows:

d. Carburetor. After the engine has been ser-

viced and is in operating order, adjust the carburetor

a. Valve Tappets. (See figure 4-28.) With the

as follows:

engine cold, adjust the inlet valve tappets to a clear-

ance of 0.008 inch, and the exhaust valve tappets to

a clearance of 0.016 inch.

(1)

Start the engine and let it warm up.

(2)

Hold the throttle closed. Adjust the idle

b. Magneto Breaker Point Gap. (See figure 4-29.)

adjusting needle (17, figure 4-13) or (22,

To adjust the magneto breaker point gap, proceed as

figure 4-12) for smoothest idling of the

follows:

engine. Turn the idle adjusting needle out

to make the mixture richer, and in to make

(1)

Take off the end cover of the magneto.

the mixture leaner.

(2)

Turn the engine over with a handcrank

until the breaker points are opened their

widest.

4 - 8 . SERVICING. After reassembly, service the

Measure the breaker point gap with a

(3)

test stand as instructed in paragraph 3-5 before you

feeler gauge. The gap should be 0.015

try to operate it.

inch.

4-45