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 541 of 894

TRUCK SERVICE MANUAL

FUEL SYSTEM

Check 9:

Shut-down Valve not open.

Check 10:

Gear pump worn.

Check 11

: Drive coupling not in mesh.

Open shut-down value on top of fuel pump.

Replace gear pump if it will not deliver required flow.

Mesh fuel pump and test stand drive couplings.

Cause

Check 1:

Front Seal leakage.

This can be determined by

covering "weep hole" in front cover with Lubriplate which stops

air entertainment.

Check 2

: Suction connection not tight or is damaged.

This

can be determined by pouring lube oil over suction

connection.

Check 3

: Main housing or spring pack housing gasket

leaking air.

Check 4:

Tachometer drive seals leaking.

Check by pouring

lube oil over tachometer drive housing.

Check 5:

Fuel level in test stand reservoir low.

Check 6:

Throttle shaft "O" rings or housing leakage can be

determined by pouring fuel oil over housing.

Correction

Remove fuel pump from test stand then remove front cover

and install new seals in cover.

Tighten suction connection or replace if mutilated.

Replace gaskets as required.

Remove fuel pump from test stand and disassemble pump

enough to replace tachometer drive oil seal in main housing.

Fill fuel reservoir with Cummins test oil.

Replace "O" ring on throttle shaft or replace housing if

leaking.

536