TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

TM-9-2320-279-20-1 - Page 305 of 985

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

Table 2-9. Troubleshooting (Cont)

BOTTOM LOAD (SELF-CONTAINED PUMP 300 GPM)

In the operation above, fuel is being pumped from an external reservoir into the tanker by means of the

tanker’s own fuel pump, capable of pumping 300 GPM. Here the fuel is drawn into the module via the

suction hose connected to receptacle B. It then flows to and through the pump (located under the tank

between the vehicle frame rails) through valve V5 located in the module and out of receptacle C. The

fuel then flows through the discharge hose into receptacle A. From this point the operation is the same as

described earlier. The HAV valve referred to is operated by the vehicle air system. The HAV is used in all

operations where the fuel pump is used and serves as a safety shut off in case of emergency. When

pumping is desired the HAV is engaged which opens valve V5 allowing fuel to flow into the module.

Refer to Figure 2-11 for tanker component identification.

NOTE

Figure 2-13. Tanker Operation Functional Diagram (Sheet 1 of 12).

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