ARMY *TM 9-6115-464-34 AIR FORCE TO-35C2-3 ... - Igor Chudov

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ARMY TM 9-6115-464-34AIR FORCE 35C2-3-445-2NAVY NAVFAC P-8-624-34LEGENDCR1 — DiodeCR2 — DiodeCR3 — DiodeCR4 — DiodeCR5 — DiodeCR6 — DiodeT1 — TransformerJ16— Plug (Mating plug to P16 of wiring harness)R1 — Resistor1 through 21 are connections and test points for Diodes CR1 through CR6 and Transformer T1NOTEJ16-N is positive 9.9 VDC in reference to J16-S with 100% rated load applied.Figure 3-66. Load Measuring Unit Component Test and Replacement Diagram3-156
ARMY TM 9-6115-464-34AIR FORCE TO 35C2-3-445-2NAVY NAVFAC P-8-624-34(10)(11)(12)If adjustment does not give the proper relationship or if relationship varies outside of acceptabilitylimits at any point, replace load measuring unit load resistor.Deactivate power source and remove load measuring unit from test circuit.Install load measuring unit cover (figure 3-64).e. Assembly.(1) Position base (27, figure 3-84), to install diode (26), transformer (25), insulation washer (24), spacersleeve (23), flatwasher (22), Iockwasher (21) and screw (20).(2) Install screw (19), insulating washer (18), load resistor (17), insulating washer, flatwasher (15),Iockwasher (14) and nut (13).(3) Install connector bracket (12), screw (11), flatwasher (10), lockwasher (9), and nut (8).(4) Install connector (7), Iockwasher (6), and screws (5).(5) Install cover (4), with flatwasher (3), Iockwasher (2) and nut (1).f. Installation. Refer to the Operator and Unit Maintenance Manual for load measuring unit installationinstructions.3-64. ELECTRO-HYDRAULIC GOVERNOR CONTROL UNIT.a. General.(1)(2)(3)(4)(5)(6)The electro-hydraulic governing system is a speed (frequency) sensing system used to maintainprime mover speed constant and therefore generator output frequency, during periods of unchangingload and when load additions or deletions occur.The system consists of a control unit, load measuring unit and hydraulic throttle actuating unit.The control unit inputs are the generator output voltage, and a dc voltage (O-9.8 Vdc) proportional tothe generator load, supplied by the load measuring unit. The generator voltage input is applied to afrequency sensing network and reference voltage network. The differential output of these twonetworks determines the control current of two magnetic amplifiers whose outputs drive separatecoils of the hydraulic actuators pilot valve. The actuator pilot valve positions the actuator powerpiston which is connected to the input arm of the fuel injection pump. The actuators hydraulic systemis comprised of a reservoir, engine driven pump (300-320 psi, 2 gpm), cooler and filter.Any deviation of engine speed, reflected as a change in frequency at the input of the governor,produces a change in the magnitude and direction of magnetic amplifier control field current. Thischange in control field current will increase the strength of one coil of the pilot valve while decreasingthe strength of the other. The resultant difference repositions the pilot valve in turn repositioning thepower piston which changes the output of the fuel injection pump, changing engine speed andconsequently restoring generator frequency to its nominal value.The load measuring units (LMU) input to the governor control provides for automatic load sharingwhen two or more sets are operated in parallel. Each set is equipped with an LMU.If the load added to the system is not equally divided, the LMU inputs to their respective governorswill differ. The resulting difference acting through additional windings of each sets governor (whichare connected in parallel) will reposition each sets actuator power piston such that fuel flow in themore lightly loaded set is increased. Since the power input of each prime mover has beenreadjusted, equal division of true power (Kw) occurs with no deviation in frequency of any set.b. MaIfunction. The following procedures are to be performed in the generator set unless otherwisespecified.3-157
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ARMY *TM 9-6115-464-34 AIR FORCE TO-35C2-3 ... - Igor Chudov

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