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 342 of 985

TM

9-2320-279-20-1

Troubleshooting Malfunctions (Cent)

Table 2-9. Troubleshooting (Con#j

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Malfunction

Test or Inspection

Corrective Action

TANKER SYSTEM (CONT)

11. TANK LEVEL INDICATOR GAGE DOES NOT REGISTER PROPER FUEL LEVEL (CONT).

MALE

SOCKET

PHOTOT

CON

Step 14. Disconnect phototransistor connector. Set TLI TANK LEVEL INDICA~R switch to ON.

Ground each female pin of phototransistor connector (male socket and female pin). Check

that TLI TANK LEVEL INDICATOR gage drops from FULL to approximately 3/4.

If TLI TANK LEVEL INDICA~R gage does not drop from FULL to approximately

3/4, replace tank level indicator adjuster (para 7-87) and install main junction box

cover (para 7-47).

Step 15. Disconnect LED connector (female pin and male socket). Set TLI TANK LEVEL

INDICA’IOR switch to ON. Check for 24 to 28vdc at each female pin.

If voltage is less than 24vdc, replace tank level indicator adjuster (para 7-87).

Step 16. If TLI TANK LEVEL INDICATUR gage does not register, repIace fuel level sensor

(para 7-88).

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