Section X. AIR INTAKE AND FUEL SYSTEM

(4) Loosen clamps (1) from upper hose (23)

4-33. Radiator

and lower hose (6) and disconnect from radiator

a. Inspection. Inspect radiator for damage to fins

(9).

a n d coolant tubes. Also inspect for leakage at

(5) Disconnect transmission cooling lines (16

transmission tubes and at radiator hoses.

and 17) at radiator and cap lines.

b. Removal.

(6) Loosen fan belt (para 4-28 a (2). Remove

(1) Raise hood and remove side panels from

fan, spacer and pulley (para 4-28a (3).

engine compartment.

(7) Remove four screws (3, fig. 4-12), nuts (4)

(2) Remove radiator cap (2, fig. 4-12), open

and lock washers (5) securing radiator. Lift

drain cock (10) at bottom of radiator and open

radiator from tractor.

drain cock on engine block to drain cooling system.

c. Installation. Reverse procedure in b a b o v e .

( 3 ) Loosen nut (14) and washer (13) and

Adjust fan belt (para 4-28 d ) .

disconnect lead from transmitter (15).

Section X. AIR INTAKE AND FUEL SYSTEM

4-34. General

b. Installation. Install air cleaner by reversing

removal procedure in a above. Tighten screw in air

This section covers components related to fuel and

cleaner clamp securely.

air supply and control. These components include

the air cleaner, carburetor, fuel pump, governor

4-36. Carburetor

and fuel tank.

a. Adjustment.

4-35. Air Cleaners

(1) Connect vacuum gage to intake manifold

(para 4-24 b (2), and tachometer to engine. Start

a. Removal.

and warm up engine.

(1) Loosen screw in air cleaner clamp (fig. 4-

( 2 ) With throttle screw (fig. 4-13), adjust

6).

engine idle to 450 to 500 rpm.

(2) Lift air cleaner and clamp off carburetor.

(3) Adjust idle mixture screw to setting giving

( 3 ) Remove gasket from carburetor intake.

the highest possible vacuum reading.

Caution: Use care to prevent foreign

Note. While making idle mixture adjustment, maintain

matter from entering carburetor inlet while air

given idle speed with throttle screw.

cleaner is removed.

4-17