TM 5-3431-225-15
FREQUENCY TRANSFORMER, CONTROL TRANSFORMER, MAIN
TRANSFORMER, MAGNETIC AMPLIFIER, AND STABILIZER
4-26. Relays
a. Removal.
(1) Remove the top and sides from the
(1) Remove the top and sides from the
welding machine (para 3-26).
welding machine (para 3-26).
(2) Remove two screws and remove the
(2) Refer to figure 4-11 and remove the
housing from the relay compartment,
high frequency panel.
b. Installation.
(3) Refer to figure 4-10 and remove the
relays.
(1) Refer to figure 4-11 and install the
b. Installation.
high frequency panel.
(1) Refer to figure 4-10 and install the re-
(2) Install the top and sides on the welding
lays.
machine (para 3-26).
(2) Replace the cover on the relay housing
and secure with two screws.
4-28. High Frequency Transformer
(3) Install the top and sides on the welding
a. Removal.
machine (para 3-26).
(1) Remove the high frequency panel (para
(2) Refer to figure 4-12 and remove the
high frequency transformer.
b. Testing.
(1) Connect an ohmmeter to the primary
leads and check the resistance. The meter should
read 230 ohms.
(2) Connect an ohmmeter to the secondary
leads and check the resistance. The meter should
read 3600 ohms.
(3) Connect a megohmeter to both pri-
mary and secondary and test the insulation break-
down.
c. Installation.
(1) Refer to figure 4-12 and install the
high frequency transformer.
(2) Install the' high frequency panel (para
4-29. Air Coupling Coil
a. Removal.
(1) Remove the high frequency panel (para
(2) Refer to figure 4-12 and remove the
air coupling coil.
b. Testing.
(1) Connect a multimeter to the coil leads
and test for continuity.
(2) If there is no reading on the multimeter,
replace the coil.
(3) Connect a megohmmeter to the coil and
test the insulation breakdown.
