TB-9-2350-368-25 Powerplant Test Stand M113A2 M113A3 M548A1 M548A3 Download
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TB 9-2350-368-25 2-25 SECTION IV. COOLING SYSTEM 2-4. COOLING SYSTEM. The radiator can be purchased or acquired from stores. The radiator can be salvaged from local can point or from DRMO. The recommended radiator is one taken from a 2-1/2 or 5-ton truck. Any radiator will work if the radiator is mounted higher than the engine. Straight radiator hose with fabricated elbows, and clamps for upper and lower connections will ease installation and removal. To prevent any airlocks, the radiator must be mounted six inches above the top of engine. If weather is above 32°, antifreeze is not necessary. A 12-volt fan, the type used on most newer cars or trucks, may be used to cool the radiator. Power for 12-volt fan can be obtained through a manual switch connected to one 12-volt battery. Make hose assembly for bleeding air from engine cooling system when running. Any large capacity radiator, tubes, and hoses may be utilized to cool the powerplant being tested. NOTE The following are fabricating instructions for the radiator. These instructions are recommended but are not mandatory. Any support that holds the radiator securely 6 inches above the engine is satisfactory. a. Radiator, Bracket, Support, and Hardware Bill Of Materials Item Nomenclature Part Number NSN Qty 3/4” by 3/4” by 1/4” 1 30 inches (76.2 cm) 2 2 3 inches (7.62 cm) 2 2” by 2” by 1/4” 3 18 inch (45.72 cm) 1 4 3 inches (5.08 cm) 2 Hardware 5 Radiator 2 1/2 or 5 ton truck 1 6 Radiator elbow 12253525 4730-01-060-9526 1 7 Gasket 10932933 5330-00-058-9263 2 8 Clamp MS35842-14 4730-00-908-6792 4 9 Hose 11662995 4720-00-177-0671 A/R 10 Hose 11662999 4720-00-150-5970 A/R 11 Tee, pipe 2090-4-4S 4730-01-048-9769 1 12 Clamp B54-32780 4730-00-908-3195 4 13 Drain cock MS35783-2 4820-00-845-1096 1 14 Straight adapter 4738-4-6B 4730-00-088-7242 2 15 Plug, elbow flange 2028-16S 1 1. Cut two 1- by 1/4-inch flat bar (1), adjust length to height of radiator. Bend top and bottom of bar to fit against the top of radiator and floor of stand. See Figure 2-16. 2. Cut 3- by 2-inch by 1/4-inch steel angle 20-1/2 inches long (3) with 45° angle. See Figure 2-16. 3. Cut 2- by 2-inch by 1/4-inch steel angle 10 inches long (4) with 45° angle. 4. Measure studs on radiator of your choice. Use these dimensions to drill two holes in steel angle (3). 5. Weld two steel angles (4) to steel angle (3). 6. Weld radiator bracket/support to powerplant test stand frame on front.