FED-STD-791 Lubricants, Liquid Fuels, And Related Products, Testing Method OfThis test method standard is composed of standard test methods for sampling, inspecting and testing lubricants, liquid fuels and related products. It is issued pursuant to the Federal Property and Administration Services Act of 1949, as amended and its application to the purchase of commodities referred to herein is mandatory on all Federal agencies.

Pages 1 - - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37 - 38 - 39 - 40 - 41|||

'�NOTE:This draft dated 15 April 2006' by DasH - Page 32 of 460

FED-STD-791D

6.6 Repeat the procedures described in paragraph 6.2, substituting a 4.54 kg (10-lb)

weight and 3000 cycle operation.

6.7 At the end of the 3000-cycle run, remove and clean gears, and reweigh the brass gear

as described in paragraph 6.1.1.1.

6.8 Conduct two complete tests, using new gear sets each time, and calculate the average

weight loss (per 1000 cycles) of the brass gears for the 6000- and 3000-cycle runs.

7. CALCULATIONS

7.1 Calculation for average weight " loss, to the nearest mg.

WL = A-B

where:

WL = weight loss in brass area.

A = original weight of brass gear, in mg.

B = final weight of brass gear in mg.

8. REPORTING

8.1 Report the average weight loss (per 1000 cycles) of the brass gears for the 6000- and

3000-cycle runs.

9. PRECISION

9.1 Precision data have not been developed for this method.

Method Prepared by:

Navy - NADC - 1986