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 544 of 894

TRUCK SERVICE MANUAL

FUEL SYSTEM

Check 4

: Incorrect weight assist protrusion.

Check

5

:

Incorrect

weights

or

worn

weight

carrier

assembly.

Check 6:

Gear pump delivery low.

Check 7

: Flow reading incorrect.

Make correct weight assist setting by proper shimming,

adjusting or replace front cover assembly.

Replace with correct new weight carrier assembly.

Check gear pump delivery.

Adjust flow meter valve.

Cause

Check 1:

Checkpoint pressure is too low.

Check 2:

Checkpoint pressure is too high,

Correction

If weight assist protrusion is within specifications, one or

more shims may be added to assembly or turn adjusting

screw to obtain correct checkpoint pressure.

Remove weight assist shims or adjust as required to

decrease pressure.

If no shims can be removed, install

new

weight assist assembly or front cover

Cause

Check 1:

Throttle shaft too loose.

Check 2:

Pressure drop across throttle shaft over 20%.

Note:

Be sure to re-mark throttle; or governor sleeve if

different size shaft or plunger has been installed.

Complaint

Remove and check fit in throttle sleeve.

Check fit of plunger and install correct size plunger to giv

correct pressure drop for degree of throttle travel.

539