TANKER SYSTEM

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

Table 2-9. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

TANKER SYSTEM

WARNING

Before starting any troubleshooting on the M978 tanker, be sure to read and follow

all safety precautions in FM 10-71, Petroleum Tank Vehicle Operations, and

TM 9-2320-279-10, Operate tanker. Liquids and vapors carried in the M978 tanker are

flammable and toxic and can cause injury or death.

NOTE

When troubleshooting the M978 tanker, refer to Figure 2-11, Tanker Component

Identification, Figure 2-12, Tanker Fuel System Functional Diagram, Figure 2-13,

Tanker Operation Functional Diagram, and Figure 2-14, Tanker Fuel System

Schematic and FO-1, Electric Diagram.

DISCHARGE LINE PRESSURE GAGE (DLPG) OR VENTURI NOZZLE PRESSURE GAGE

(VNPG) NOT WORKING.

Step 1. Check DLPG/VNPG gage tubing connections for looseness or damage and for damaged

tubing.

Tighten loose tubing or damaged connections and replace damaged tubing.

Step 2. Check for obstructions in DLPG/VNPG tubing and in piping at tubing connections.

Remove tubing from DLPG/VNPG gages and piping (para 25-4). Clean piping and

tubing. Inspect for damage. Replace damaged tubing.

Step 3. If problem remains, replace defective DLPG/VNPG gage (para 22-3 or 22-4).