FED-STD-791D
lists all toxic and hazardous materials cited in FTMS 791. The synonyms, life hazard,
flammability, handling and storage precautions, emergency treatment and measures, and
spill practices of each chemical are explained.
5.2 Lubricating oil, SAE J1966.
5.3 Flushing solvents.
5.3.1 Dry cleaning (A-A-59601D).
5.3.2 Petroleum ether (O-E-751) [1,4,0].
5.4 Test gear retaining nut lock washer, Fafnir WO-6 (Erdco Engineering Corp-
oration, Addison, ILL, or any commercial supplier of Fafnir parts).
5.5 O-rings. An O-ring is used between the main case and the end cover of the
Ryder gear machine. National No. 622710 O-rings 0.238 1.27 1.75 cm (3/32 1/2
11/16 in) are recommended. It is recommended that a new O-ring be used each time the
end cover is installed. These rings can be obtained from Erdco Engineering Corp.,
Addison, IL, or any commercial supplier of National O-rings.
5.6 Shaft seals. The shaft seals recommended for the Ryder Gear machine are
Garlock seals (obtained from Erdco Engineering Corp., Addison, IL, or the Garlock
Packing Co., Palmyra, NY) with the following part numbers and dimensions:
a. Klozure 63 359 with 9478 element and light-weight spring 2.86 5.08
0.952 cm (l-1/8 2 3/8 in).
b. Klozure 63 1200 with 9478 element and light-weight spring 5.08 7.30
1.27 cm (2 2-7/8 1/2 in).
6. PROCEDURE
6.1 Operating condition.
6.1.1 Throughout the entire test, the variables listed in Table I should be
controlled within the limits specified. With the tester operating within the specified
limits, the test gears are loaded first to 34 kPa gage (5 psig) load oil pressure, and then at
successive increments of 34 kPa (5 psi). The duration of each loading period is 10 min
5 s. At the end of each loading period, the tester is stopped and each tooth of the narrow
test gear is examined to determine the percent of tooth area scuffed.
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