ASTM D6987 Standard Test Method for Evaluation of Diesel Engine Oils in T-10 Exhaust Gas Recirculation Diesel Engine
6. Apparatus
6.1 General Description:
6.1.1 The test engine is a Mack E-TECH V-MAC III, electronically controlled fuel injection with six electronic unit pumps, P/N 11GBA81025 (Annex A2). It is an open-chamber, in-line, six-cylinder, four-stroke, turbocharged, charge air-cooled, and compression ignition engine. The bore and stroke are 124 mm by 165 mm [4 7/8 by 6 1/2 in.], and the displacement is 12 L [728 in.3].
6.1.2 The ambient laboratory atmosphere shall be relatively free of dirt and other contaminants as required by good laboratory standards. Filtering air, controlling temperature, and controlling humidity in the engine buildup area helps prevent accumulation of dirt and other contaminants on engine parts and aids in measuring and selecting parts for assembly.
6.2 The Test Engine:
6.2.1 Mack T-10 Test Engine - The engine is available from Mack Trucks, Inc. Acomplete parts list is shown in Table A2.1. Use test parts on a first-in/first-out basis.
6.2.2 Engine Cooling System:
6.2.2.1 Use a new Mack coolant conditioner shown in Table A2.1, for every test to limit scaling in the cooling system. Pressurize the system to 103 kPa [15 psi] at the expansion tank. Use the coolant shown in 7.3.1.
6.2.2.2 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 shall 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.
6.2.2.3 Flow the coolant from the engine block fitting to the EGR coolers (see Fig.A1.3). Return the EGR coolant flow to the engine coolant-in line near the coolant pump inlet (see Fig.A1.7).
6.2.3 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 L/min +/- 1.9 L/min [1.5 +/- 0.5 gal/min] with an auxiliary pump. The system schematic is shown in Fig.A1.1. 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 forAeroquip lines provided they have the proper inside diameters.
6.2.3.1 Locate the auxiliary oil system suction line on the exhaust side of the oil pan, 127 mm [5.00 in.] down from the oil pan rail and 178 mm [7.00 in.] back from the front of the pan. This location is directly above the oil sump temperature thermocouple. Refer to Fig.A1.4. Connect the auxiliary oil system return line to the power steering pump cover on the front timing gear cover. Refer to Fig.A1.5. Connect the auxiliary oil scale vent line to the top of the auxiliary oil sump bucket and the dipstick tube opening.
6.2.3.2 Use a Viking pump Model No.SG053514 as the auxiliary oil pumps. Pump speed is specified as 1725 r/min.
6.2.4 Oil Cooling System:
6.2.4.1 Use the oil cooler adapter blocks to mount the oil cooler to the engine. The adapter blocks are available from the supplier list in A2.7, Annex A2.
6.2.4.2 Use the oil filter housing (part no.27GB525M) shown in Fig.A1.8.
6.2.5 Blowby Meter - Use a meter capable of providing data at a minimum frequency of 6 min. 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 A2.3, Annex A2. 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 or cooling, or both, of the fuel supply may be required, and a recommended system is shown in Fig.A1.2.
6.2.8 Intake Manifold Temperature Control - Use a Modine intercooler to control intake manifold temperature (refer to A2.4).
6.2.9 Injection Timing Control - Remove the engine intake manifold temperature sensor. Use the intake manifold temperature to control injection timing according to the temperature to injection timing correlation shown in Annex A5.
6.2.10 Oil Pump - Use a Mack P/N 315GC465BM oil pump. The oil pump is available from Mack Trucks, Inc. (see A2.2).
7. Engine Fluids
7.1 Test Oil:
7.1.1 Approximately 151 L [40 gal] of test oil is required for the test.
7.2 Test Fuel:
7.2.1 Obtain test fuel from the supplier shown in A2.6, Annex A2. The required fuel properties and tolerances are available from the TMC.
7.3 Engine Coolant:
7.3.1 Use demineralized water with less than 0.03 g/L [2 grains/gal] of salts or distilled water (do not use antifreeze solutions). Use Pencool 3000 coolant additive at the manufacturer's recommended rate. Pencool 3000 may be obtained from the supplier shown in A2.8, Annex A2.
7.4 Solvent - Use only mineral spirits meeting the requirements of Specification D235, Type II, Class C for Aromatic Content (0 - 2% vol), Flash Point (142°F/61°C, min) and Color (not darker than +25 on Saybolt Scale or 25 on Pt-Co Scale). (Warning - Combustible. Health hazard.) Obtain a Certificate of Analysis for each batch of solvent from the supplier.
