Section IV. OPERATION UNDER UNUSUAL CONDITIONS

TM 55-4920-231-14

and 19) turned to open valves before starting

46. GENERAL.

tests.

This section contains special operating instruc-

tions which are necessary for the proper func-

48. OTHER UNUSUAL CONDITIONS.

tioning of the tester under unusual conditions.

CAUTION

47. EXTREMES OF HEAT AND COLD.

Contamination in the pneumatic or lu-

bricating systems will- damage the in-

The tester is designed to operate in tempera-

tures from 40°F. to 160°F (40°C. to 71°C.).

struments controls and the pump.

When operating in normal or extreme high tem-

a. When operating the tester in extreme con-

peratures to 160°F, use the high temperature oil

ditions of snow, ice, rain, mud, dust, salt air, or

in the reservoir for lubricating the pump. For

similar conditions, do everything possible to pre-

extreme low temperature operating range (from

vent foreign material from entering the pneu-

+32°F. to -40°F), use the low temperature oil

matic or lubricating systems.

and operate the pump for at least 5 minutes with

b. After operation in extreme conditions, thor-

both selector valve knobs (10 and 20, figure 7)

oughly clean and dry the tester and accessories.

in the OFF position and the knobs (11, 12, 17,