TM-5-3805-254-14-P-2

TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)

JUNE 1980

TM-5-3805-254-14-P-2 - Page 496 of 894

TRUCK SERVICE MANUAL

FUEL SYSTEM

Check 1 - Drain Flow Lines

Cause

Use of a line with less than 5/16 inch [7.95 mm]

I.D.

or

crimp caused by sharp bend in drain line.

Correction

Replace per line K in Fig.

6-1-121.

Check 1 - Filter Installation

Cause

Removal of the filter assembly from the circuit.

Installation of the filter assembly in the suction side of the

gear pump.

Check 2 - Filter Can

Cause

Installation of a smaller or more rigid than standard filter

can.

Check 3 - Gear Pump

Cause

Low gear pump delivery.

Check 4 - Cam Eccentricity

Cause

Cam base circle eccentricity.

Correction

Install filter.

Filter assembly must be in specified location as shown.

Correction

Filter must be of specified type.

Correction

With the pressure regulator by-pass line (line G, in Fig.

6-1-121) completely blocked, check the gear pump

against a 0.045 inch [11.1 43 mm] orifice installed in line

L.

The gear pump is acceptable if it delivers 80 to 120 psi

[552 to 827 kPal during this check.

If the gear pump delivers less than 80 psi [552 kPa],

check the fuel strainer for clogging end consequent

pump suction restriction and clean if necessary; the gear

pump must be replaced.

Correction

Check as follows:

(a) Align timing wheel mark and pointer.

(b) Install ST-790-5111 load cell with regulated air

pressure to give 380 lbs.

[172 kg] load.

Repeat the

clamping several times to assure that the setting of the

clamping load is correct.

491