the width of the tape on the tube test
hand end of the rollers through the
data roll chart and the other half on
holes in the roller guide plate.
the roller.
(4) Replace the three roller guide plate
(4) Roll the tube test data roll chart, with
mounting bolts, nuts, and lockwashers.
the printed side upward, onto the up-
Tighten the bolts with the fingers.
per roller to within approximately 1
There should be a clearance of approxi-
foot of the end of the tube test data
mately 0.06 inch (three thicknesses of
roll chart. Be careful to keep the tube
old tube test data roll chart paper )
test data roll chart square with the
between the faces of the rollers and the
edges of the upper roller. Keep the
roller guide plate.
paper taut by hooking a rubberband
(5) Check the knurled knob on the front
over the pin on the gear end of the
of the tube test data roll chart housing
roller and stretching it over the pin on
for ease of operation by turning the
the other end of the roller.
tube test data roll chart once through
(5) Fasten the end of the tube test data roll
its entire length. If the tube test data
chart to the lower roller with pressure-
roll chart binds and the knurled knob
sensitive tape. Apply the tape as de-
is difficult to turn, or if the knurled
scribed in (2) and (3) above. Roll the
knob turns so freely that the tube test
remaining length of the tube test data
data roll chart becomes slack, readjust
roll chart onto the upper roller.
for proper clearance between the faces
c. Replacement.
of the rollers and the roller guide plate
(1) Place the tube test data roll chart
by loosening the bolts and again ad-
housing on end, with the gear (closed)
justing for a clearance of 0.06 inch
end on the bottom.
((4 ) above). The bolt holes through
(2) Hold the tube test data roll chart taut
the roller guide plate end of the tube
on both rollers. Insert the gear ends of
test data roll chart housing are slightly
the rollers through the tube test data
elongated to permit adjustment. When
roll chart guide plate and into the holes
operation of the knurled knob is sat-
in the roller pivot plate. Move the
isfactory, tighten the screws securely.
knurled knob on the front of the hous-
ing, if necessary, to engage the gears
(6) Remount and tighten the tube test
and guide the pins into their pivots.
data roll chart housing on the mount-
(3) Replace the roller guide plate; at the
ing brackets inside the cover of the
same time, insert the pins on the right-
tube tester.
AGO 1428A
32
