KIC Catalog

on the spindle or axle tube, torque the inner (adjusting)

nut to 200 lbf• ft (271 N•m) while rotating the wheel hub

assembly. Refer to

Table 1

at the end of this Recom-

mended Practice.

Step 3:

Back off the inner (adjusting) nut one full turn.

Rotate the wheel.

Step 4:

Re-torque the inner (adjusting) nut to 50 lbf• ft

(68 N•m) while rotating the wheel hub assembly. Refer

Table 1

at the end of this Recommended Practice.

Step 5:

Back off the inner (adjusting) nut. Refer to Table

1 at the end of this Recommended Practice for the prop-

er back-off amount.

Step 6:

Install the locking washer.

If dowel pin and washer (or washer tang and nut flat)

are not aligned, remove the washer, turn it over and re-

install. If required, loosen the inner (adjusting) nut just

enough for alignment.

IMPORTANT

Never tighten the inner (adjusting) nut for alignment

at this point of the procedure. This may pre-load the

bearing and cause premature failure.

Step 7

: Install and torque the outer (jam) nut. Refer to

Table 1

at the end of this Recommended Practice for

proper torque values.

NOTE: This adjustment allows the wheel to rotate

freely with 0.001” to 0.005” (0.025 mm to 0.0127 mm)

end play.

Step 8:

Verify end play with a dial indicator. Wheel end

play is the free movement of the tire and wheel assem-

bly along the spindle axis.

(a) Make sure the brake drum-to-hub fasteners are tight-

ened to the manufacturers’ specifications.

(b) Attach a dial indicator with its magnetic base to the

hub or brake drum.

is against the end of the spindle with its line of action ap-

proximately parallel to the axis of the spindle. See

Fig.

(d) Grasp the wheel assembly at the 3 o’clock and 9

o’clock positions. Push the wheel assembly in and out

while oscillating it to seat the bearings. Read bearing

end play as the total indicator movement.

NOTE: If end play is not within specification, read-

justment is required.

Step 9: RE-ADJUSTMENT PROCEDURE

Excessive End Play

If end play is too loose, remove the outer (jam) nut and

pull the washer away from the inner (adjusting) nut, but

not off the spindle. Tighten the inner (adjusting) nut to

the next alignment hole of the washer. Reassemble the

washer and re-torque the outer (jam) nut. Refer to

Table

for torque values. Verify end play with a dial indicator.

Insufficient End Play

If end play is not present, remove the outer (jam) nut and

pull the washer away from the inner (adjusting) nut, but

not off the spindle. Loosen the inner (adjusting) nut to

the next alignment hole of the washer. Reassemble the

washer and re-torque the outer (jam) nut. Refer to

Table

for torque values. Verify end play with a dial indicator.

FINE TUNING THE ADJUSTMENT

If, after performing the readjustment procedures, end

Wheel Bearing Adjustment Procedures