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 321 of 985

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

2-15. TROUBLESHOOTING INSTRUCTIONS (CONT).

Table 2-9. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

TANKER SYSTEM (CONT)

4. CANNOT BOTTOM LOAD FUEL WITH TANKER PUMP.

Step 1. Check for defective air actuator system. Remove airhose from V5 air actuated flow valve.

Operate HAV HAND ACTUATED CONTROL VALVE (TM 9-2320-279-10). Check for air

blowing out of hose and for continuous exhausting of air from HAV HAND ACTUATED

CONTROL VALVE.

If no air, or if HAV HAND ACTUATED CONTROL VALVE continuously exhausts air,

repair HAV HAND ACTUATED CONTROL VALVE (para 18-16).

Step 2. Actuate HAV HAND ACTUATED CONTROL VALVE (TM 9-2320-279-10). Check if V5 air

actuated flow valve opens.

Replace defective V5 air actuated flow valve (para 25-19).

Step 3. Check pressure on DLPG DISCHARGE LINE PRESSURE GAGE while operating pump

(TM 9-2320-279-10).

If less than 10 psig (69 kPa) on DLPG DISCHARGE LINE PRESSURE GAGE,

replace primary pump (para 25-6).

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