TM 5-4310-393-14Compressor Impeller/Groove Pulley) are also provided for the compressed air. Each of these units is replaced byunbolting the affected part and replacing it with a manufacturer's numbered part.4-14.2. LUBRICATING SYSTEMThis task covers: A. Inspect B. Repair C. ReplaceTools:Materials/Parts:Tool Kit, General Mechanic's SetO-ring (P/N N07091)Calibrated Test Pressure GaugeHalo Carbon Grease, NSN 9150-00-754-2760Equipment ConditionsCompressor Removed and SecuredNOTEThe compressor oil pump is a non-repairable item. Inspection and venting of thepump are described in paragraph 3-14.1. In case the pump becomes inoperable,replace it as follows:A.Replace.1.Replacing the Lube Oil Pump (Figure 4-6).a.Remove oil line from bottom of oilpump.b.Remove three cap screws (4) andwashers (3).c.Remove oil pump (2) and gasket (1)from compressor crankcase.d.Replace pump with a new one inreverse order of removal.e.Remove the filter mount (figure 3-7item 14) from the crankcase pump housing to provideaccess to the pump drive cam.Figure 4-6. Oil Pumpf.The actuator (5) of the pump must always be in contact with the cam.g.Put a 0 018 inch (0.3 mm) feeler gauge between the pump actuator (5) and the low side of cam.h.Turn the fan wheel by hand This should be possible without heavy resistance.i.If heavy resistance is felt, install a new gasket of proper thickness. The pump actuator must alwaysbe in contact with the cam, but must not overstroke the pump.j.Reassemble removed components as original.B.Inspect.1.Inspecting the Oil Pressure Regulator.a.The lube oil pressure regulator is mounted on the third stage cylinder of the compressor. Oil from thelube oil pump enters the regulator at a port in the mounting flange. Oil returns to the crankcase from the regulator through4-16
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