TM 55-1925-284-14&P
0028 00
INSTALLATION
1. Position the rear of the thermal relay (figure 6, item 2) into the retaining slot in the magnetic contactor (figure 6,
item 4).
2. Lift the front of the thermal relay (figure 6, item 2) and guide its line side leads (figure 6, item 5) into the
clamping screws (figure 6, item 3) on the magnetic contactor (figure 6, item 4).
3. Secure the line side leads (figure 6, item 5) by tightening the clamping screws (figure 6, item 3).
4. Connect the load side wiring (figure 6, item 1) using the labels from step 2 of Removal as a guide. Remove
the labels.
5. Perform the Follow-On Service procedure at the end of this work package.
MAGNETIC CONTACTOR REPLACEMENT
NOTE
The left magnetic contactor/thermal relay assembly is for the MSD discharge pump.
The right magnetic contactor/thermal relay assembly is for the blower. The units may be
replaced singly.
REMOVAL
1. Perform the Replace Thermal Relay Removal procedure in this work package.
2. Label and disconnect the wiring (figure 6, item 6) from the line side of the magnetic contactor (figure 6, item 4)
and from the ground (figure 6, item 7).
3. Slide the magnetic contactor (figure 6, item 4) sideways to remove it from the mounting rail (figure 6, item 8).
INSTALLATION
1. Slide the magnetic contactor (figure 6, item 4) onto the mounting rail (figure 6, item 8).
2. Connect the wiring (figure 6, items 6 and 7) using the labels from step 2 of Removal as a guide. Remove the
labels.
3. Perform the Follow-On Service procedure at the end of this work package.
TRANSFORMER REPLACEMENT
REMOVAL
1. Perform the Open the Controller procedure at the beginning of this work package.
2. Label and disconnect the wiring (figure 7, item 1) from the transformer (figure 7, item 2).
3. Remove the four mounting screws (figure 7, item 3) and remove the transformer (figure 7, item 2).
0028 00-7