5-12. VALVES, VALVE SEATS, GUIDES AND SPRINGS.

Figure 5-1. Magneto, DisassemblY and Reassembly.

Figure 5-2. Valves, Removal, Disassembly, Reassembly and Installation.

TM-10-4930-204-13 Tank and Pump Unit Liquid Dispensing for Truck Mounting (United Manufacturing and Engineering Corp. Model Style 1) Manual
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TM 10-4930-204-13 (3) Insert stop pin (30) and rotor (29) in housing (35) and install bearing (28), support (27), and screw (26). (4) Install ring (25), washer (24), seal (23), washer (22), coupling assembly (21), spring (20), hub assembly (19), bearing (18), key (17), gear (16), nut (15), and connect wire (14). (5) Install contact assembly (13), camwick holder (12), screw (11), ring (10), washer (9), and screw (8). (6) Install capacitor (7) and secure with washer (6) and screw (5). (7) Install gasket (4), outlet (3), cover (2), and secure with screws (1). e. Installation. Install magneto (para 4-24f.). 5-12. VALVES, VALVE SEATS, GUIDES AND SPRINGS. a. Removal and Disassembly. (1) Remove carburetor, muffler, tappet inspection plate, and cylinder head (para 4-24). (2) Remove locks (1, fig. 5-2), spring seat (2 and 7), and springs (3 and 8) from crankcase (12). (3) List intake valve (4) and exhaust valve (9) from engine and remove guides (5) and tappets (6). (4) Remove cups (10) and inserts (11). b. Cleanin g, Inspection and Repair. Drycleaning solvent normally has a flash point of either 100 or 138 degrees F, depending on the type being used, but may flash at much lower tem- peratures if contaminated with gasoline or jet fuel. Avoid repeated and prolonged skin, contact. Do not use near open flame or excessive heat. (1) Clean valves with wire brush to remove all carbon de- posits. Clean valve seats, ports, and guide in cylinder block; clean top of cylinder block. Wash springs with drycleaning solvent (item 1, App . F), and dry thoroughly. (2) Inspect valves for burned, pitted, or cracked faces; replace burned, cracked or deeply pitted valve. 5-5

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