Drain coolant system in accordance with TM 9-6115-643-24.
Remove expansion plug from rear of engine head (refer to engine TM 9-6115-254-24). Apply retaining compound to
the mating surface of new expansion plug (5), Figure 5-3. Install expansion plug, then flush with engine block using a
brass drift on outer edge only.
Install coolant hose (7) from expansion plug (5) to heater coolant intake using clamps (6).
Cut lower coolant hose (8) and install tee (pointing towards back of generator set) (2). Secure with clamp (1).
Install coolant hose (4) from tee to heater coolant using clamp (3).