Figure 3-81. Idler gear assembly, disassembly and reassembly.

Figure 3-81. Idler gear assembly, disassembly and reassembly.

g e a r hub through the end plate and into the

d. Cleaning, Inspection, and Repair.

(1) Clean the idler gear and bearing assembly,

counterbore in the cylinder block.

hub and thrust washers thoroughly. Examine gear

(3) Insert two 3/8 inch-16 bolts through the

teeth and bearing for scoring, pitting, and wear. If

idler gear hub and thread them into the cylinder

gear teeth are worn or bearing is scored, pitted or

block, as shown in figure 3-82 to be sure the bolt

h o l e s will be in alignment when the flywheel

worn excessively, the gear and bearing and bearing

housing is installed.

assembly must be replaced, or a new bearing in-

stalled in the gear. Also, examine the outside

(4) Insert the 3/8 inch-16 by 1 inch special

diameter of the idler gear hub and thrust washers

bolt through the center of the idler gear hub and

for being scored and worn. If the thrust washers or

thread it into the cylinder block. Tighten bolt to 30-

gear hub are scored and worn excessively, they

35 foot pounds torque. Then, remove the two 3/8

must be replaced.

inch-16 bolts previously installed for alignment of

the gear hub.

NOTE

(5) Lubricate the idler gear hub and idler gear

When a new bearing is being installed in the idler

gear, it must not protrude beyond the gear face on

bearings liberally with clean engine oil.

either side.

(6) Position the crankshaft gear and camshaft

gear or balance shaft gear so that their match

(2) Slide the idler gear straight back off of the

marks will align with those on the idler gear.

idler gear hub.

(7) With these match marks in alignment,

(3) Remove bolt which secures the idler gear

install the idler gear, as shown in figure 3-83.

hub to the cylinder block. Then, remove the idler

(8) Apply a thin film of cup grease to the inner

gear hub and the rear idler gear thrust washer as an

face (face with oil grooves) of the outer idler gear

assembly from the engine.

thrust washer. Then, place the thrust washer over

e. Installation.

the end of the idler gear hub with the oil grooves in

(1) Place the inner thrust washer over the

side of thrust washer facing the idler gear. and the

forward end of the idler gear hub with the flat in the

flat in the inner diameter of thrust washer over the

inner diameter of the thrust washer over the flat on

flat on the end of the idler gear hub.

the end of the gear hub, and the oil grooves in the

(9) Install idler gear hole spacer.

thrust washer facing the idler gear.

(10) Install the flywheel housing (para 3-22).

(2) Place the small protruding end of the idler

3-94