Magneto - TM-5-4320-243-150056

TM 5-4320-243-15

(4) Continue to rotate the engine until the

flywheel timing mark is aligned as shown in figure 3-25.

(5) Install the magneto and gear as shown by

figure 3-24 with the magneto timing gear mark aligned

as shown by figure 3-25.

(6) Install the spark plug in the number 6

cylinder and install the timing cover plug(fig. 3-25).

(7) Follow the instructions in d below and

time the engine.

d. Ignition Timing

(1) Connect the ignition timing light to the

number 6 sparkplug lead and to the 24-volt power

source.

(2) Start the engine and let it idle

(3) Point the timing light through the timing

hole in the flywheel housing. If the timing is correct, the

flywheel timing mark (fig. 3-25) will be in line with the

pointer inside the flywheel housing each time the light

flashes.

(4) To correct faulty timing, loosen the

magneto clockwise and counterclockwise until timing is

correct. Tighten the magneto mounting screws.

3-50. Spark Plug Leads and Spark Plugs

a. Remove and install the spark plug leads and

Figure 3-19. Generator, bracket and adjustment

spark plugs as shown in figure3-26.

strap,

Caution: Do not pull on the cable or twist the

braided shielding.

b. Refer to figure 3-22, and perform the on-

equipment test.

b. Clean and check the gap between the spark

plug electrodes with a wire feeler gage. The correct gap

3-49. Magneto

is 0.030 inch. If necessary, regap the electrodes,

a. Adjustment. Adjust the magneto contacts as

carefully bending the ground electrodes until the proper

shown by figure 3-23.

gap is established.

b. Removal. Remove the magneto and magneto

3-51. Batteries, Cable and Box

gear as shown by figure 3-24. Clean and inspect.

a. Remove and install the battery cover, batteries,

c. Installation.

and battery cable as shown in figure 2-1, in sequence

(1) Remove the spark plug from the number

indicated by key numbers.

6 cylinder (para 3-50).

b. Remove and install the battery box by removing

(2) Make the timing marks accessible as

four screws and lockwashers holding the battery box to

shown by figure 3-25.

the skid.

(3) Place the thumb over the spark plug hole.

c. Test and service battery as directed in daily

Rotate the engine until air pressure is felt, indicating the

preventive maintenance services chart, figure 3-4.

compression stroke.

3-27