TM 55-4920-428-13
e. Install the replacement control or switch and attaching hardware.
f. Solder the wires to the control or switch. Use solder QQ-S-571 (Table 4-2, item 3). (See wiring
diagram, FO-21.)
g. Remove the tags.
h. Rotate control or switch shaft fully counterclockwise.
i. Install the knob, pointer aligned with the most counterclockwise panel marking. Tighten the set
screws.
j. Install the panel. (Ref para 4-41.)
k. Perform the final test. (Ref para 4-42.)
4-27. Replacement of Elapased Time Meter.
a. Remove the panel. (Ref para 4-18.)
b. (See fig. 6-3.) Tag and unsolder the wires from the meter (70).
c. Remove the attaching hardware. Remove the meter.
d. Install the replacement meter. Secure it with the hardware.
e. Solder the wires to the meter. Use solder QQ-S-571 (Table 4-2, item 3). (See wiring diagram,
FO-21.)
f. Remove the tags.
g. Install the panel. (Ref para 4-41.)
h. Perform the final test and check meter for appropriate time change. (Ref para 4-42.)
4-28. Replacement of NULL Meter. (CRC)
a. Remove the panel. (Ref para 4-18.)
b. (See fig. 6-3.) Tag and disconnect the wires from the meter (59).
c. Remove the attaching hardware. Remove the meter and gasket (60).
d. Install the gasket (60) and replacement meter. Secure it with the hardware.
e. Connect the wires to the meter and install the nuts and washers. (See wiring diagram FO-21.)
f. Remove the tags.
g. Install the panel. (Ref para 4-41.)
h. Perform the final test. (Ref para 4-42.)
4-29. Replacement of DVM. (CRC)
a.
b.
c.
d.
Remove the panel. (Ref para 4-18.)
(See fig. 6-3.) Remove the cover from the rear of the meter (47).
Remove the retainer from the rear of the meter.
Tag and unsolder the wires from the meter.
4-7
