ASTM D6483 Standard Test Method for Evaluation of Diesel Engine Oils in T-9 Diesel Engine
6. Apparatus
6.1 General Description:
6.1.1 The test engine is a Mack E7-350 electronically governed engine, P/N 11GBA78786 (see Annex A3). It is an open-chamber, in-line, six-cylinder, four-stroke, turbocharged, charge air-cooled, compression ignition engine. The bore and stroke are 124 by 165 mm (4 7/8 by 6 1/2 in.), and the displacement is 12 L (728 in.). The engine is rated at 261 kW (350 bhp) at 1800 r/min governed speed (see SAE J1995).

6.1.2 The ambient laboratory atmosphere should be relatively free of dirt and other contaminants as required by good laboratory standards. Additionally, it is recommended that the atmosphere in the engine buildup area be filtered and controlled for temperature and humidity to prevent accumulation of dirt and other contaminants on engine parts. Uniform temperature control aids in measuring and selecting parts for assembly.

6.1.3 Use the low sulfur reference diesel fuel shown in Table 1.

6.2 Test Engine:
6.2.1 Mack T-9 Test Engine - The engine is available from Mack Trucks, Inc. Acomplete parts list is shown in Table A3.1. Use test parts on a first-in/first-out basis.

6.2.2 Engine Cooling System: Use a new Mack coolant conditioner shown in Table A3.1, every test, to limit scaling in the cooling system. Pressurize the system to 103 kPa (15 psi) at the expansion tank. Use a closed-loop, pressurized external engine cooling system composed of a nonferrous core heat exchanger, reservoir, and water-out temperature control valve. The system should prevent air entrainment and control jacket temperatures within the specified limit. Install a sight glass between the engine and the cooling tower to check for air entrainment and uniform flow in an effort to prevent localized boiling. Block the thermostat wide open.

6.2.3 Engine Oil System - A schematic of the engine oil system is shown in Fig. A2.8, Annex A2.

6.2.4 Auxiliary Oil System - To maintain a constant oil level in the pan, provide an additional 9.5 L (10 qt) sump by using a separate closed tank connected to the sump. Circulate oil through the tank at a rate of 5.7 +/- 1.9 L/min (1.5 +/- 0.5 gal/min) with an auxiliary pump. Typical oil rig plumbing is shown in Fig. A2.7. The No. 6 and No. 8 lines are to have inside diameters of 10 mm (3/8 in.) and 13 mm (1/2 in.), respectively. Use a minimum No. 8 size vent line. Equivalent lines may be substituted for Aeroquip lines, provided they have the proper inside diameters.

6.2.5 Blowby Meter - Use a displacement type gas meter, or equivalent, to measure blowby. To prevent blowby condensate from draining back into the engine, the blowby line shall have a downward slope to a collection bucket. The collection bucket shall have a minimum volume of 18.9 L (5 gal). Locate the blowby meter downstream of the collection bucket. The slope of the blowby line downstream of the collection bucket is unspecified.

6.2.6 Air Supply and Filtration - Use the Mack air filter element and the Mack filter housing shown in A3.3. Replace filter cartridge when 2.5 kPa (10 in. H2O) ΔP is reached. Install an adjustable valve (flapper) in the inlet air system at least two pipe diameters before any temperature, pressure, and humidity measurement devices. Use the valve to maintain inlet air restriction within required specifications.

6.2.7 Fuel Supply - Heating, cooling, or both, of the fuel supply may be required, and a recommended system is shown in Fig. A2.9.

6.2.8 Intake Manifold Temperature Control - Use a Modine intercooler to control intake manifold temperature (refer to A3.4). A typical intercooler arrangement is shown in Fig. A2.10.

7. Engine Fluids
7.1 Test Oil - Approximately 151 L (40 gal) of test oil are required for the test.

7.2 Test Fuel - The recommended fuel with the properties and tolerances are shown in Table 1. Test fuel may be obtained from the supplier shown in A3.8.

7.3 Engine Coolant - Use demineralized water with less than 0.03 g/L (2 grains/gal) of salts or distilled water (do not use antifreeze solutions). It is permissible to use Pencool 3000 coolant additive at the manufacturer's recommended rate.

7.4 Cleaning Materials - Use a solvent meeting Specification D235, Type II, Class C for cleaning parts. Other materials, such as diesel fuel, may be required by some labs to ensure parts cleanliness. (Warning - Use adequate safety precautions with all solvents and cleaners.)