Section XIV. FUEL SYSTEM - TM-10-3930-630-120081

TM 10-3930-630-12

voltmeter.

(2) A test ammeter is required as shown to

(11) Install dust seal, rotor and distributor cap

give an accurate measurement.

(para 4.53).

(3) Close ignition switch and adjust voltage

d Coil Primary Continuity Test.

with adjustable resistance (fig. 444) to 12 volts.

(1) With ignition switch off, connect an

(4) Test ammeter should read 2 to 3 amperes.

ohmmeter across coil primary terminals.

(5) If reading is not correct, replace coil

(2) Ohmmeter reading should be steady. If

(6) Turn ignition switch off.

Remove

ohmmeter fluctuates, replace coil

connections and instruments used for the test.

c. Primary Ignition Circuit Resistance Test.

(3) Disconnect ohmmeter.

e. Coil Secondary (High Tension) Continuity Test).

(1) Disconnect wire from resistor to coil

(1) Disconnect high tension coil wire (1, fig. 4-

primary from coil primary terminal

41) from top of ignition coil (10).

(2) Connect a voltmeter with a one volt scale

(2) Connect an ohmmeter across the high

in series with the positive battery terminal and coil

tension terminal (18) at top of coil to primary terminal

primary terminal

(17) on distributor.

(3) Remove distributor cap, rotor, and dust

(3) Ohmmeter should read less than 20,000

seal (para 4-53) and rotate engine to close breaker

ohms resistance. If reading exceeds this value, replace

points in distributor.

coil.

(4) Turn ignition switch on. Voltmeter should

(4) Disconnect ohmmeter and install high

not read more than 0.20 volts.

tension coil wire on coil.

(5) Turn ignition switch off.

Disconnect

f. Removal

voltmeter leads from battery and coil Connect resistor to

(1) Disconnect high tension coil wire (1, fig. 4-

coil terminal

41) from top of coil Disconnect distributor primary wire

(6) Connect one voltmeter lead to coil primary

(16) and coil to resistor wire (4) from terminals on top of

terminal that holds the distributor primary lead.

coil Disconnect wires from resistor (11).

(7) Ground other voltmeter lead on distributor

(2) Remove screws (5), washers (7),

housing.

lockwashers (6 and 8) and nuts (9) and remove coil (10)

(8) Turn ignition switch on. Voltmeter should

and resistor (11) from bracket.

read less than 0.10 volts.

g. Installation.

(9) If readings exceed voltage specified,

(1) Install coil (10, fig. 4-41) and resistor (11)

replace coil.

on bracket and secure with screws (5), lockwashers (6

(10) Turn ignition switch off and disconnect

and 8), washers (7) and nuts (9).

Section XIV. FUEL SYSTEM

4-56.

General

(2)

Open left side panel and tilt seat up and

forward

The fuel system (fig. 445) consists of the fuel tank (51),

(3) Remove wing nut (10, fig. 4-46) and lock

fuel filter (52), fuel pump (21), carburetor(32) and

washer (11).

governor (28). Fuel is drawn from the tank by the fuel

(4) Remove cover (13) and remove filter

pump through the fuel filter. The fuel pump delivers it to

element (14).

the carburetor where it is mixed with air from the air

(5) Install new element into cover and install

cleaner and the mixture is supplied to the intake

cover and element on base.

manifold. The velocity type governor monitors the

(6) Secure cover and element to bracket with

amount of fuel to the manifold and regulates engine

wing nut and lockwasher.

speed. The air cleaner is mounted on the trunk frame

(7) Close side panel and lower seat into

and connected to the carburetor with hoses.

position.

e. Removal.

indicator, mounted in the air line, indicates condition of

the air cleaner element.

(1) Lift seat up and forward. Position rod to

hold seat in open position. Open left side panel.

4-57.

Air Cleaner

(2) Loosen tywrap (3, fig, 4-46). Loosen

clamps (1) and remove hose (2) from air cleaner and

a. General. The dry-type air cleaner (fig. 446) is

engine.

mounted on the left side of the engine compartment.

(3)Remove indicator (6) from tube. Loosen

The air cleaner bracket is attached to the truck frame.

clamps (4) and remove hose (5) and tube (7) from

b Service.

carburetor.

(1) When the air cleaner indicator (fig. 3-1)

(4)Loosen clamp (9) and remove hose (8) from

shows the element requires replacement remove

air cleaner.

element as follows:

(5) Remove wing nut (10) and lock washer

(11) and remove air cleaner cover and base (13) and

4-53