FED-STD-791D
6.5.10 The rig is then shut down in accordance with the shutdown procedure described in
6.6.4.
6.5.11 When the system cools to room temperature, the tank and test oil system should
be drained into a suitable container so that the volume of test oil remaining can be determined.
After the volume of test oil has been measured and recorded, 3.8 L (1 gal) of the test oil should
be poured into a clean container and saved for laboratory analyses.
6.5.12 Rig photographs. As soon as possible, the rig should be disassembled. Although
color is preferred, black-and-white photographs, measuring at least 7.6 H l0.2 cm (3 H 4 in) or
slides should then be taken of the following parts:
a.
Bearing compartment with cover removed - front view.
b.
Heater mount - rear side.
c.
Cover plate - rear side.
d.
Seal plate in housing - heater and bearing removed.
e.
Test bearing - inner race, rollers and cage assembly.
f.
Test bearing - outer race, inside diameter.
Test oil tank - baffle plate.
g.
h.
Test oil tank - baffle removed.
6.5.13 After the photographs are completed, a more detailed visual inspection is made of
these parts to determine the average depth, coverage, consistency, and type of oil deposits, plus
the extent of abnormal metal wear on the test bearing cage, rollers, roller pockets, and outer race.
Rate deposits according to 6.7.
6.6 PROCEDURES
6.6.1 Flushing procedure.
1. Install a fine mesh (100 mesh) filter at the inlet of the spray nozzle and a coarse mesh
(40 mesh) filter at the inlet of the scavenge pump. It is not necessary to preweigh the
filters.
2. The same type of oil is used to flush the system as used in the test. Service the test oil
tank with 7570 mL (2 gal) of test oil.
3. Insure that the tank is vented by means of an exhauster/blower arrangement and that the
vent is open.
4. Insure that the test oil supply valve at the inlet side of the pressure pump is closed.
5. The watt-hour meter reading for the test oil heater should be recorded before the flush is
begun.
6. At the control panel turn on the following switches in the order shown:
a. Control panel power.
b. Support test oil cart power.
c. Stirrer.
d. Timer.
e. Test oil heater.
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