Cleaning and Inspection - TM-10-3930-632-340060

TM 10-3930-632-34

To remove the float axle, press a screwdriver

Inspect all parts of the carburetor for wear,

against the float axle at the slotted side of the float hinge

distortion, cracks, breaks, or other damage.

bracket. Remove the axle from the opposite side and

remove the float (12).

6-6.

Reassembly

After the float is removed, take care that the

fuel valve does not drop from the valve seat.

Refer to figure 6-1 to reassemble the carburetor.

Use a file to match-mark the throttle lever on

Reassembly is the reverse of disassembly. Note the

the throttle shaft and the throttle body. These marks will

following:

serve as a guide to assure that the parts will be

reassembled in the proper manner.

During reassembly, align the match-marks

Use a file to match-mark the choke bracket,

made during disassembly on the fuel bowl, choke

choke lever, and the boss on the fuel bowl. These marks

bracket, and choke shaft and lever.

will serve as a guide to assure proper reassembly.

Align the match-marks made at disassembly

To remove the plug, insert a 1/4 inch rod, 6

on the throttle body and throttle shaft and lever.

inches long, through the opposite side of the fuel bowl

Note that the screw holes in the throttle plate

and drive out the plug.

are off-centered. Start the side of the throttle plate with

the shortest distance between the screw holes and

WARNING

beveled edge in to place first. The plates are made with

two opposite edges beveled to fit the throttle body bore

Dry cleaning solvent, P-D-680, used to clean

when the plate is closed. The throttle plate will not close

parts is potentially dangerous to personnel and

tightly if installed upside down. Pressure on the plate

property. Avoid repeated and prolonged skin

must be maintained with the finger until the screws are

contact. Do not use near open flame or

excessive heat. Flash point of solvent is 100 F.

tightened. When properly installed, the side of the throttle

- 138 F. (39 C. - 59 C.).

plate farthest away from the mounting flange will be

aligned with the idle discharge holes when the plate is

closed.

6-5.

Cleaning and Inspection

After installing the float (12) and axle, check

the position of the float. With the throttle body in an

Discard all washers and gaskets. Replace

inverted position and viewed from the free end of the

these parts with new ones from the repair kit.

float, the float bodies must be centered and at right

Clean all parts in cleaning solvent P-D-680 and

angles to the machined surface (fig. 6-2). The distance

dry thoroughly with compressed air.

from the machined surface of the throttle body to the top

Blow out all passages in the air intake, fuel

side of the highest point of the float bodies must be 1-

bowl, and throttle body with compressed air.

5/32 + 3/64 inches. To increase or decrease the distance

between the float body and machined surface, use long-

CAUTION

nosed pliers and bend the lever close to the float body.

Do not clean by inserting a wire or drill into any

openings or passages as this will destroy their

fine calibration.

Figure 6-2. Float Level Adjustment.

6-3