1.11 CONSTRUCTION

Table 1-2 Description of Major Components, Generator Set 150 kW

TM-9-6115-668-13 5Kw 28VDC Auxiliary Power Unit (APU) MEP 952B Manual
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TM 9-6115-668-13 1.11 CONSTRUCTION. 1.11.1 Base Frame Assembly and Unit Hood Assembly. The Generator Set 150 kW consists of the base frame assembly (3, figure 1-2) on which the assemblies and the unit hood assembly are mounted. The engine and generator compartments are separated from one another by a panel and is fastened to the base frame assembly. The base frame assembly is a welded aluminum frame on which the following components are mounted: l Identification plate for the Generator Set 150 kW (10) l Identification plate for the base frame, complete l J3 SLAVE RECEPTACLE 24 VOLTS (15) and designation plate for the J3 SLAVE RECEPTACLE 24 VOLTS l Four lifting rings (16) for hoisting the Generator Set 150 kW l Six eyebolts (17) for securing the unit hood assembly The unit hood assembly (1) protects the assemblies from the elements, and muffles the noise produced by the diesel engine and synchronous generator. On each long side it has two swing-up flaps, supported on gas cylinders, providing access to the engine and generator compartment and the control cabinet as- sembly displays and controls. For voltage equalization, each flap is connected by a grounding strap to the unit hood assembly, and the unit hood assembly is grounded to the base frame assembly with a strap. The control cabinet assembly connectors are accessible through an opening in the unit hood assembly that is covered by a protective profile. Four eyebolts are mounted on the top surface to allow removal of the unit hood assembly. 1.11.2 Engine Compartment. The engine compartment contains the diesel engine with starter, battery charging alternator, and fuel and oil filters, the subcurrent filter assembly, the scavenge pump assembly, and the engine preheating assem- bly. The diesel engine (2) is fastened to the base frame assembly with two shock absorbers and two engine mounts, and connected to the synchronous generator with a clutch. It is cooled by the electro-hydraulic fan (EHG). Cooling air is drawn in at the front of the unit hood assembly, blown over the diesel engine cooling fins, and exhausted through the two air leading ducts in the unit hood assembly. Combustion air is drawn in at the back of the unit hood assembly and delivered to the diesel engine through the air filter assembly (12) integrated into the partition, and the turbocharger. Exhaust gases are discharged through the silencer assembly (6) mounted under the base frame assembly and then into two exhaust hoses. En- gine oil is filtered through the oil filter located on the diesel engine, and the subcurrent filter assembly (14). The subcurrent filter assembly is connected to the diesel engine by two oil lines. It performs the function of the oil filter on the EHG, whose centrifugal oil cleaner is not accessible for maintenance. For oil changes and repair operations, engine oil is pumped out with the manually operated scavenge pump assembly (5), which is equipped with a stopcock. The intake side is connected to the oil sump with an oil hose. A ball cock with handle is fitted to the oil drain hose. 1 - 7

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