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 522 of 894

TRUCK SERVICE MANUAL

Tachometer Cable

The tachometer drive is a standard SAE size operating

at 1/2 engine speed.

Fill cavity with clean, heavy grease

before attaching cable.

Do not force tang into slot.

If fit

is incorrect, change tang to a new, standard SAE type.

When tachometer cable outer casing is plastic, do not

route near exhaust manifold or other "hot" areas.

Fuel Pump Throttle Travel

The most sensitive adjustment on units using a hydraulic

governor is fuel pump throttle travel.

Do not change the

idle throttle stop screw setting (front).

Using a protractor

or ST-1162, Fig.

5-126, set the fuel pump lever idle

position centerline at 55 deg.

from vertical on centerline

of fuel pump throttle shaft.

Lock throttle lever screw.

Set

the centerline of the fuel pump lever in the maximum

position at 27 deg.

from vertical.

Lock rear adjusting

screw.

Recheck throttle lever centerline travel, it must

be 28 deg., or as specified, between idle and full throttle.

Fig.

5-126, F-5187.ST-1162 fuel pump throttle

adjustment template

For PT Fuel Pump calibration and speed setting refer to

FUEL PUMP CALIBRATION.

Governor Shaft And Linkage Adjustment

1.

Governor-to-fuel-pump linkage must be connected

with both fuel pump throttle and governor terminal shaft

levers in fuel shut-off or Idle position.

The fuel pump

throttle lever will be all the way down against stop (full

clockwise) and the governor terminal shaft away from the

engine will be in extreme clockwise position.

2.

Adjust control linkage to a length (about 9-1/2 inches

[241 mm] ) which will permit installation of unibals in

levers without any movement of levers.

Caution:

Be sure linkage and levers are not binding.

3.

Start engine and adjust low speed stop screw (atop

governor head) for desired idling speed.

517

FUEL SYSTEM