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Servicing Hydraulic System.
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TM-1-4920-446-13P Hydraulic System Test Stand Type D-8A P/N 7459 Manual
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Figure 3-1.  Lubrication Diagram
TM 1-4920-446-13 & P d.  Place main pump circuit breaker located in the electrical components panel in ON  position.  This will energize the reservoir fluid level gauge  located on  the control panel. e.  Ensure drain valve is closed then fill the test stand reservoir with hydraulic fluid, MIL-H-83282, until the fluid level gage indicates 3/4 full. 3-9.  Preliminary  Lubrication.  Carefully  inspect  the  test stand  lubricating points referred to in Figure 3-1.  Be sure that initial lubrication exists at all specified points. SECTION III.  PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) 3-10.  General  Information.  Maintenance  consists of periodic inspections of the hydraulic and electrical components, including piping, hoses, and connections; replacement of filter elements; testing of instrument accuracy; troubleshooting a malfunctioning unit; and lubrication.  Section V  of this chapter provides repair or replacement instructions authorized at the Aviation Unit Maintenance level.  Repair or replacement of all other parts is to be done at the Aviation Intermediate Maintenance Level (annotated in parenthesis  after the component  to be maintained).  The AVUM/AVIM  Maintenance procedures complies with the maintenance Allocation Chart, Appendix B. 3-11.    Periodic  inspection  and  servicing.    The  test  stand  shall  be  periodically  inspected  in  accordance  with  Table  3-1. Lubrication shall be performed as part of periodic inspection.  Daily inspections should be performed before and/or after each day's operation.  Intermediate and periodic inspections (Tables 3-2 and 3-3) will be done at operating intervals of 50 and 100 hours.  Refer to Table 3-4 for daily servicing requirements, and to Table 3-5 for a list of lubricants to be used. NOTE Keep all foreign matter out of lubricants.  Do not leave lubricant containers open any longer than necessary.  Store lubricants  in a clean, dry area. 3-3

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