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 518 of 894

TRUCK SERVICE MANUAL

FUEL SYSTEM

Tachometer Drive In Housing

The life of tachometer

drive seal can be significantly improved by keeping

maximum clearance between gear and bushing to .005

inch [0.127 mm] and by correctly installing drive

assembly into fuel pump housing.

1.

Line up oil groove in top of bushing with fuel pump

drive shaft.

Press bushing, shaft and gear assembly into

housing with ST-1032 Driver until bushing bottoms.

Note:

Using any tool but ST-1032 Driver may cause

indentations In oil seal which leads to premature seal

failure.

2.

Install spacer on top of bushing with slotted edge

down.

Install new oil seal, with spring side down, with

ST-1032 Driver.

Spacer must bottom on bushing.

Caution: Do not overpress spacer.

It can be

flattened eliminating its effectiveness.

3.

Cover top of seal with a thin coat of lubricating oil.

Install new felt dust seal with white side up.

Secure

tachometer cover with new gasket to housing.