damaged and defective mounting screws, nuts, and lockwashers. Always use a new top tank gasket when
reassembling the top tank of the radiator core.
(4) Reassembly. Refer to paragraph 129d.
c. Bottom Tank.
(1) Disassembly. Refer to paragraph 129c.
(2) Cleaning and inspection. Discard the bottom tank gasket (14) and wash the bottom tank (17) in cleaning
solvent. Use a stiff brush to clean all openings, corners, and recesses in the tank body. Clean the inside
and outside surfaces of the outlet pipe and remove all traces of the gasket sealer from the mounting surface
of the outlet pipe. Inspect the bottom tank for cracks, leaks, corrosion, etching, and damage. Inspect the
mounting surface of the tank and clean it thoroughly. Remove all traces of the old gasket from the mounting
surface and inspect the mounting ridge for bents, dents, and cracks. Inspect all mounting screws, nuts, and
lockwashers for corrosion, damage, wear, and stripped threads.
(3) Repair. Weld all minor cracks, breaks, and holes. If the bottom tank is badly corroded, etched, or cracked,
replace it. Avoid excessive heat when welding, because it may warp or distort the tank body. Replace the
bottom tank if badly warped or if the mounting surfaces are distorted or bent out of shape. Replace all worn
or defective mounting screws, nuts, and lockwashers. Always use a new bottom tank gasket when
reassembling the bottom tank to the radiator core.
(4) Reassembly. Refer to paragraph 129d.
d. Installation. Refer to paragraph 129.
Section V. FUEL SYSTEM
186. Operational Description of Fuel System
The fuel system of this road roller is of the gravity type. The fuel tank is located under the compression roll housing,
above the carburetor and engine mounting level. There is no fuel pump on this road roller. When the fuel tank valves are
opened, the gravity of the fuel forces the fuel to flow to the carburetor. The updraft type carburetor vaporizes the fuel and
directs the vaporized fuel and air mixture into the intake manifold and cylinder combustion chambers, where it is ignited
and converted into a mechanical force.
187. Carburetor
a. Removal. Refer to paragraph 106b.
b. Disassembly.
(1) Remove the flange gasket (1, fig. 97) from the top of the throttle body (3).
(2) Unscrew and remove the fuel filter elbow (8).
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