Section XIV. UNIT MAINTENANCE OF THE GENERATOR SET CONTROLS

Figure 4-38. Control Cubicle Assembly, Exploded View (Sheet 1 of 3)

TM-9-6115-464-12 Wrench Impact Hydraulic Model MV-12-140T Manual
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ARMY TM 9-6115-464-12 AIR FORCE TO 35C2-3-445-1 NAVY NAVFAC P-8-624-12 Section XIV. UNIT MAINTENANCE OF THE GENERATOR SET CONTROLS 4-62 GENERAL. This paragraph contains unit maintenance instructions for the generator set controls. The con- trol cubicle assembly and the fault locator panel contain the controls, instruments,and indicators for controlling and monitoring the operation of the generator set. The 400 Hz and 50/60 Hz tactical precise models incorporate a gover- nor control unit which operates the hydraulic actuator to change the governor setting. This function is fulfilled by the manual speed control on the tactical utility model. The interconnecting wiring harness provides electrical con- nection between the major assemblies and the control cubicle and fault indicator panel. 4-63 CONTROL CUBICLE ASSEMBLY. The generator shall be shut off and the battle disconnected prior to per- forming maintenance on the control cubicle assembly. Failure to observe this warning may result in electrical shock or death by electrocution. NOTE Access to the interior of the control cubicle assembly is obtained by loosening three fasteners at the top of the panel and swinging the panel forward on the hinge at its lower side until its weight is supported by the door holders. a. Oil Pressure Gauge. (1) Removal. (a) Tag and disconnect electrical leads to oil pressure gauge. (b) Remove nuts (1, Figure 4-38), lockwashers (2) and clamp (3). (c) Remove oil pressure gauge (4) from panel. (2) Inspection and cleaning. (a) Clean oil pressure gauge with filtered compressed air and a soft bristle brush or wipe with a dean, lint-free cloth lightly moistened with an approved solvent. (b) Visually inspect oil pressure gauge for corrosion, cracked casing, cracked or broken glass, stripped or otherwise damaged threads, and evidence of other damage. (3) Testing. (a) (b) (c) (d) (e) (f) (g) Connect a multimeter across the terminals of a rheostat. Adjust rheostat until multimeter indicates 30 ohms resistance. Disconnect multimeter, but do not disturb rheostat adjustment. Connect rheostat to terminal of oil pressure gauge marked SEND. Connect rheostat and oil pressure gauge in series with a 24 Vdc source with negative lead to oil pres- sure gauge terminal marked IGN. Oil pressure gauge should indicate 60 PSI. Replace oil pressure gauge if it does not function properly. (4) Installation. (a) (b) (c) Install oil pressure gauge (4, Figure 4-38) onto panel. Install damp (3), lockwashers (2), and nuts (1). Connect electrical leads to oil pressure gauge. 4-83

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