Figure 14-3. Regulator Excitation Test Circuit

Figure 14-5. Hydraulic Pump and Related Parts

TM-5-6115-545-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 30 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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M E 6 1 1 5 - 5 4 5 - 3 4 / 1 4 -3 Figure 14-3. Regulator Excitation Test Circuit M E 6 1 1 5 - 5 4 5 - 3 4 / 1 4 -4 Figure 14-4. Two Terminal Brush Assembly Section III. HYDRALIC PUMP ASSEMBLY (CLASS 1, PRECISE SETS ONLY) 14-13. General. The hydraulic pump assembly supplies oil under pressure to the electro-hydraulic actuator on Class generator sets. The hydraulic pump is located on the left side of the engine at the rear of the timing gear housing and is driven by the hydraulic pump drive assembly. The drive assembly is driven by the camshaft gear and contains two tapered roller 1 bearings which are lubricated by engine oil splashed by other gears in the timing gear train. The pump assembly is lubricated by circulating hydraulic oil. 14-14. Hydraulic Pump Malfunctions, Removal and Disassembly. a. Symptoms and Isolation of Malfunction. A mal- function of the hydraulic sump is usually indicated by fluctuating frequency observed on the frequency meter as a result of erratic hydraulic oil pressure, sluggish response of the actuator to load changes as a result of low hydraulic oil pressure, or failure of the governor system due to loss of hydraulic oil pressure. To iso- late a malfunction of the hydraulic oil pump, proceed as follows: (1) Check hydraulic oil level by observing sight glass on hydraulic oil sump. Insure that oil level is sufficient. (2) Check all hydraulic lines and fittings for signs of leakage. 14-6 (3) Carefully examine pump and mounting adap- ter for signs of leakage. (4) Thoroughly clean area around fitting on pump for hydraulic line to filter and around drain valve on hydraulic pump. (5) oil. (6) hydraulic (7) (8) Remove drain valve and drain hydraulic Insert 0-400 psi gauge between pump and line to throttle actuator. Refill sump and start engine. Pressure should be 310 to 330 psi. If the reading shows erratic pressure or low pressure, then there is a malfunction of the hydraulic pump assembly. Proceed to the removal, disassembly and repair procedures. b. Removal and Disassembly. (1) Open left hand area engine door, drain hydraulic oil pump and discard oil. Thoroughly clean area around hydraulic oil fittings. Disconnect lines from hydraulic pump. Remove pump as illustrated in figure 14-5. Cap all hydraulic fittings when opened.

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