TM 5-6640-212-14
Figure 3-6. Test Gage Set (Pneumatic)
Dry, if necessary, with clean lens tissue or thoroughly
ted lever. Remove and replace the lamp, and close the
washed linen.
trap door.
NOTE
3-24. Penetrometer.
Avoid the use of linen or tissue which
a. Inspection. Check the dial and test rod for
has been lying about on the
accuracy.
Replace a defective or otherwise
worktable where it can pick up dust
unserviceable penetrometer.
b. Cleaning. Remove test product with solvent. Air-
and grit.
dry or wipe dry with a clean, lint-free cloth. Use mild
(3) Use camel's hair brush to clean the internal
soap and water if necessary and dry thoroughly to
mirror and scale.
prevent rust.
b. Replacing Lamps.
c. Lubricating. Lubricate stem, adjusting and locking
(1) Field Lamp. Unscrew the toric-shaped housing
screws, depth gage and needle gears, and clutch
from the swinging arm. Remove and replace the lamp,
mechanism as often as required, using light lubricating
and secure the housing.
oil (PL-S).
(2) Scale Lamp. Swing open the trap door on the
bottom of the instrument by rotating the slot-
3-30
