Chapter 4. REPAIR OF FUEL SYSTEM

CHAPTER 4

REPAIR OF FUEL SYSTEM

(5) Remove main assembly nozzle (26) and

4-1. General

gasket (25) from bowl.

The truck uses a Zenith model 261 JX7 single venturi

(6) Remove two screws (31) and remove throttle

updraft carburetor, with a centrifugal governor.

plate (4) from shaft.

(7) Remove throttle shaft and idle jet (28) from

4-2. Carburetor Repair

body.

a. Removal, Installation and Adjustment. Refer to TM

(8) Remove idle mixture adjusting screw (8) and

10-3930-627-12.

spring (7) from body.

b. Disassembly.

(9) Remove venturi (11) from body.

(1) Remove screws (17, fig. 4-1) that attach

(10) Remove main jet (15) and well vent jet (12)

throttle body (5) to fuel bowl (19) and separate the two.

from bowl.

(2) Remove hinge pin and float and pin assembly

(11) Remove screws (14) and remove choke plate

(9) from fuel bowl..

(24) from shaft (13).

(3) Remove needle, seat and gasket assembly

(12) Remove choke shaft from body.

(27) from throttle body.

(4) Remove bowl to body gasket (10) from body.

4-1