COOLANT SYSTEM - TM-9-2350-261-34

F I N A L T E S T C O O L A N T H E A T E R

TM-9-2350-261-34 Carrier Personnel Full Tracked Armored M113A2 2350-01-068-4077 Carrier Command Post Light Tracked M577A2 2350-01-068-4089 Manual
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TM 9-2350-261-34 COOLANT SYSTEM 2. 3. 4. Do not use more than 5 gallons of coolant. Use same coolant as in earner. Do not use water. Change coolant quickly. Allow coolant to cool between tests. The coolant system should have a shutoff valve (1). Vent the coolant container (2) for air. The coolant container may remain open or closed. Use of a therrno-syphon type flow is allowed. No pump is required. ELECTRICAL WIRING 5. 6. Wire the heater (3) (as shown on page 14–66), using the regular wiring harness. Connect a multimeter (4) across the circuit between the hot lead of the control box (5) and the power source (6). Use a fully charged battery for the power source. EXHAUST COLLECTOR 7. Conduct the heater exhaust away from the test area. Use an exhaust extension made of flexible hose (7) not more than 10 feet long. TESTING 8. 9. 10. A complete test of the coolant heater con- sists of the following: a. b. c. d. e. Fuel flow test (page 14-48). Burn test. Restriction thermostat test. Thermostatic switch test. Combustion air blower test. Obtaining equipment for the combustion air blower test may be difficult. Do not do this test if the heater burns properly and the igniter cavity does not show undue carbon deposits. Replace the blower if the heater goes out during test or smokes a lot and has heavy carbon deposits in the igniter cavity (page 14–60). Moderate carbon deposits are normal and do not indicate a bad blower. 14-64

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