Bleeder adjust screw
Radio noise suppression capacitor C2
Fuse holder XF1
Bell toggle switch S7
Governor resistor R1
TEST PROBE receptacle connector J1
Electric bell DS5
Terminal board TB3
Figure 3 -Continued.
the locknut from the bushing over which
(5) Press the lens (8 and 10, fig. 3) of the
the light is mounted. Remove the PILOT
ACCEPT and REJECT lights into place on
light from the rear of the front panel and
the front panel (42).
remove the green lens (31, fig. 3) with its
bushing from the front of the front panel.
(4) Remove the locknut from both the
ACCEPT and REJECT lights (7 and 8, fig.
11. Balance Orifice Holder
4) and push the lights through their
mounting holes in the front panel (42, fig.
a. Description. The balance orifice holder (5, fig. 5)
3). Pull the red lens (8) from the REJECT
is located over the calibrator assembly and houses
light and remove the incandescent lamp
balance orifices 03 and 04 (2). Two balance orifices,
(9). Pull the green lens (10) from the
used as a matched pair, are installed to distribute the
vacuum evenly to the two sides of the diaphragm switch
S1 in the calibrator. For all cases, during use, the pair of
c. Cleaning and Inspection.
Make certain the
balance orifices must pass air at a rate exceeding the
terminal lugs and the lamp contacts are clean and will
amount of air passed by the comparison orifices 01 and
provide good electrical contact. Clean the lens and see
02 used elsewhere in the equipment.
that the lens fits securely in the light.
(1) Insert the ACCEPT and REJECT lights (7
and 8, fig. 4) through their mounting holes
(2) Disconnect the flared tube nut at the
in the front panel (42, fig. 3). Secure them
coupling adapter (4, fig. 5) that connects
in position with their locknuts.
the balance orifice holder (5) with the
(2) Insert the green pilot light lens (31) with its
copper tubing (11, fig. 4) that connects to
bushing in its mounting hole in the front
the bleeder housing (56).
panel and install the PILOT light (24, fig.
(3) Disconnect the flare tube nut (6, fig. 5) at
4) over the bushing. Secure the PILOT
the pipe to tube elbow that connects into
light in position with its locknut.
the calibrator housing.
(3) Solder the proper two electrical wires to
(4) Disconnect the flared tube nut (7) at the
the terminals of the ACCEPT light (7), the
coupling adapter on top of the pipe cross
REJECT light (8) and PILOT light (24).
and remove the balance orifice holder as
(4) Screw the incandescent lamps (9, fig. 3)
and (27, fig. 4) into their respective light