SAFARI

REAR AXLE

Fig. 70

Fig. 69

Check ring gear and pinion backlash at three equally

spaced points with dial indicator.

Fig. 69

Backlash tolerance is 0.13 to 0.20 mm. and should

not vary more than 0.08 mm. between the three

points checked.

High backlash is corrected by moving the ring gear

closer to the pinion. Low backlash is corrected by

moving the ring gear away from the pinion.

These corrections are made by switching shims

from one side of the differential case to the other.

If backlash is to specification CHECK the ring gear

and pinion tooth contact pattern.

INTERPRETING RING GEAR AND PINIONTOOTH

PATTERN

The toe of the gear tooth is the portion of the tooth

surface at the end toward the center. The heel of the

gear tooth is the portion of the tooth surface at the

outer end. The top land of a gear foot is the surface

of the top of the tooth.

Fig. 70

The illustrations explain how contact pattern shift

as gear location changes.

When making pinion position changes, shims should

be changed in steps of 0.05 mm minimum, until cor-

rect pattern has been obtained.

When a change in backlash is required backlash

shims should be changed in the range of 1.5 times

the amount of backlash required to bring the gears

into specification. For example, if the backlash must

be changed by .10 mm the shim pack should be

ranged by .15 rnm as a starting point. The actual

amount of backlash change obtained will vary, de-

pending upon the ratio and gear size.

Note:

Making changes involves two variables. Ex-

ample: if you have the backlash set correctly

to specifications and you change the pinion

position shim, you may have to readjust the

backlash to the correct specification before

checking the pattern. Refer to pattern inter-

pretation.