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 841 of 894

GEARS AND CASE

MAINSHAFT

ASSEMBLY

AND

INSTALLATION

PARTIAL INSTALLATION OF MAIN DRIVE GEAR

The diameter of the main drive gears used in the

R8000 Series auxiliaries are larger than the main drive

gear bearing bore in the case. This necessitates a partial

assembly of the drive gear in the case prior to installation

of the mainshaft assembly.

NOTE

Assemble auxiliary drive gear bearing

(A-9) with outer race snap ring toward

gear teeth to prevent bearings from

operating with thrust load against snap

ring.

1. Position inner race of drive gear roller bearing

(A-9) under arbor press with flanged end of inner race

up. Support inner bearing race and press drive gear (A-1)

into bearing. Be sure flanged end of inner race bottoms

against front face of drive gear.

2. Position drive gear pocket bearing (A-10) in drive

gear (A-1) and press into place.

NOTE

Drive gear pocket bearing (A-10) is

made in two pieces. Be sure pocket

bearing is assembled with flanged end of

inner race up or so it will be toward

mainshaft.

3. Use soft hammer and tap outer race and roller

assembly of drive gear bearing (A-9) into front bearing

bore of case. Seat bearing tight against counterbore of

case.

4. Lower front end of drive gear (A-1) through top

opening of case and slide it forward into drive gear roller

bearing assembly (A-9).

5. Check to make sure inner race of drive gear

pocket bearing (A-10) is in place in drive gear

counterbore.

MAINSHAFT ASSEMBLY:

Prior to assembly check the following parts for slip

fits, to insure free and easy assembly of the mainshaft

inside the case.

(a)

Spline fit of direct and overdrive clutch

gear (B-5) with clutch collar (B-6) and fit of

internal splines on (B-5) with mainshaft

splines.

(b)

Slip or loose fit of overdrive gear sleeve

(B-10) on mainshaft ground diameter.

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