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Figure 34. Distributor Check Valve Position


A. Cleaning

1. Soak all castings and metal parts in a cleaning solution long enough to loosen all foreign deposits. Agitating the parts in the solution usually promotes a more thorough cleaning.   If a commercial cleaning solvent is not available, lacquer thinner or denatured alcohol may be used. Place the parts and castings to be cleaned in a metal basket suspended in the solution to keep them out of the sediment which collects in the bottom of the container. After the parts have soaked sufficiently, rinse them in hot water to remove all traces of the cleaning solution. While rinsing the parts and castings, scrub away all remaining foreign matter with a stiff bristle brush.


Parts such as the accelerating pump leather piston, gaskets, diaphragms, and felt seals should never be exposed to the cleaning solvent. Most commercial solvents will deteriorate these parts.


2. Soak each part and casting in clean gasoline for a few seconds and dry with compressed air. Compressed air should also be directed


through all passages in the castings and through all jets and tubes.


Carburetor jets and passages should never be cleaned with a drill, wire, or similar objects. This method of cleaning may distort jets and passages, and affect carburetor performance. A buffing wheel, wire brush, file, or other sharp instruments should not be used to remove carbon deposits, as the protective plating on the part might be removed by scratching or filing.

B. Inspection

1. Major Castings

Check Major castings for cracks, stripped threads, damaged gasket mating surfaces, and other damages. The passages in the castings should be checked with compressed air to make sure they are free of obstructions. (Refer to Section B, "OPERATION", for location of passages in the castings.)

2. Choke Shaft

Carefully check the shaft for bending, wear on bearing surfaces, and damaged threads. Shafts with any of these irregularities should be replaced.

3. Float and Lever Assembly

Discard and replace the float and lever assembly if the float leaks, or if the assembly is corroded or damaged in any way. Shake the float to determine if fuel has leaked in.

4. Choke and Throttle Linkages

Discard and replace choke and throttle levers if they are bent or otherwise damaged. Check all linkages for worn bearing surfaced. Be sure the choke lever swivel isfirmly attached to the lever and rotates freely.

5. Throttle Shaft and Throttle Plates

Carefully check the shaft for bending or other damage. Check the plates for corrosion and nicked edges. If any irregularities appear on these two parts, replace them.

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