A-A-52476 Pump, Engine Priming, Hand-Driven, (Nonaircraft) EngineThis CID covers a hand-operated, displacement type for engine priming and a replacement kit. The pump is capable of delivering 5 to 20 centimeters (cc) of fuel per stroke in 5 cc increments determined by the number of sleeves installed. This pump is intended for installation in, or as auxiliaries to, the fuel systems of vehicles, and other military equipment powered by internal-combustion engines, either during production, or in the field as part of winterization or other kits.

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A-A-52476

1. This CID is not intended to limit the design or configuration other than to features and dimensions specified herein.

2. Valve assembly contains check valve for proper operation of pump. Do not remove or substitute fittings.

3. Bonnet, plunger seal retaining nut, plunger locking washer, connector body outlet and valve assembly inlet shall be leaded brass, 1/2 hard conforming to Unified Numbering System (UNS) C35600.

4. Barrel material: Brase, round, seamless tubing, cond-hard-drawn, UNS C33200.

5. Sleeves material: Plastic, tubes, rolled paper-base, phenolic-resin.

6. Clip, plunger locking material: Carbon steel, UNS G10600 to G10750, zinc plated.

7. Body shall be bronze casting conforming to UNS C93200 or C93500.

8. Dimensions are in inches. Tolerance are as shown.

9. Engine priming pump, PIN A52476-3, is modified to obtain 10 cc, 15 cc, or 20 cc by removing sleeves from shaft to increase the length of the stroke.

FIGURE 1. Pump assembly, manual, engine priming