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Page Title:
Relief pressures, inlet pressures and case drain pressures |
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|  MIL-D-63303B(AR)
Install 10 micron filter elements in the hydraulic
a.
reservoir.
b. Fill the system with the appropriate hydraulic fluid
(see MIL-D-63370).
c. Conduct all adjustments, break-in run, acceptance test,
etc. at the contractor's plant using the 10 micron filters.
d. Prior to shipment of the Dispenser, drain system of all
hydraulic fluid. Install 25 micron filters (per Dwg. 9291082,
Hydraulic Reservoir Assembly) in the hydraulic reservoir. Prepare
hydraulic system for shipment and storage in accordance with
MIL-D-63370.
e. After the tests have been run at the contractor's plant
using 10 micron filters~ drain the hydraulic fluid from the system,
replace the 10 micron filters with 25 micron filters (per Dwg.
9291082), and refill the system with fluid filtered through a 10
micron filter. Note: It will be necessary to flush the hydraulic
system, including components if another fluid, which is not
compatible with the drained fluid, is used.
f. Perform roll-off cleanliness test through analysis of
hydraulic fluid sample obtained from the suction line after the
hydraulic system has been warmed up (6.7.4) and all hydraulic system
components have been operated for a minimum of 20 minutes.
4.6.2.6.2 Hydraulic system leakaqe. The hydraulic system shall
be wiped clean and dry and the system operated and lines checked for
leaks (see 6.7.2).
4.6.2.6.3 Pressure and vacuum. Connect applicable test
equipment (see 4.5.3) to respective hydraulic lines and/or test
points (TP) to verify pump and valve settings. Start the engine and
after warm up (see 6.7.4) , read instruments for compliance with
3.4.2.4.3 through 3.4.2.4.7.
4.6.2.6.3.1 Relief pressures, inlet pressures and case drain
pressures. The inlet pressure of the pumps (4), the case drain
pressure of the pumps (3) and motors (2) and the relief pressures
shall be measured using gauges accurate to within plus or minus five
percent (5%) of full scale. The gauges selected shall have a full
scale that is no more than 150 percent of pressure reading required
in 3.4.2.4, unless previously accepted by government inspection
equipment personnel. The gauges shall be inserted into the
hydraulic system at gauge test points provided by the technical
design. Pressure readings shall be taken after the dispenser has
been conditioned at minus 25 5F (-32 2.78C) for
twenty-four (24) hours. Non-conformance to para. 3.4.2.4 shall
constitute failure of this test.
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