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76
play is 0.004” - 0.005” (0.102 mm - 0.127 mm) range, re-
peat the appropriate procedures, removing the washer
from the spindle, tighten or loosen the inner adjusting nut
the equivalent of 1/2 of an alignment hole of the washer,
or reversing the alignment washer, and reinstalling it
onto the spindle. Reassemble and re-torque the outer
(jam) nut. Refer to
Table 1
for torque values. Verify end
play with a dial indicator.
NOTE: Bendable-type washer lock only: Secure nuts
by bending one wheel nut washer tang over the in-
ner and outer nut. Bend the tangs over the closest
flap perpendicular to the tang. See Fig. 2.
CAUTION: Before operating the unit, the wheel hub
cavities and bearings must be lubricated to prevent
failure. For final wheel end assembly refer to TMC
RP 622.
Wheel Bearing Adjustment Procedures
WHEEL BEARING ADJUSTMENT PROCEDURE
STEP 1: Lubricate the wheel bearing with clean axle lubricant of the same type used in the axle sump or hub assembly.
Note: Never use an impact wrench when tightening or loosening lug nuts or bolts during the procedure.
INITIAL
ADJUST-
ING
NUT
TORQUE
INITIAL
BACK OFF
FINAL
ADJUST-
ING
NUT
TORQUE
BACK OFF
JAM NUT TORQUE
ACCEPTABLE
END PLAY
AXLE
TYPE
THREADS
PER INCH
FINAL
BACK OFF NUT SIZE
TORQUE
SPECIFICATIONS
STEP 2 STEP 3 STEP 4
STEP 5
STEP 6
STEP 7
STEP 8
200 lb•ft
(271 N•m)
While
Rotating
Wheel
One
Full
Turn
50 lb•ft
(68 N•m)
While
Rotating
Wheels
Steer
(Front)
Non-Drive
12
1/6 Turn *
Install Cotter Pin to Lock Axle Nut
in Position
0.001”-0.005”
(.025-.127 mm)
As Measured
Per Procedure
With Dial
Indicator
18
1/4 Turn *
14
1/2 Turn
Less Than
2-5/8” (6.7
mm)
200-300 lb•ft
(271-407 N•m)
18
Drive
12
1/4 Turn
Dowel
Type
Washer
300-400 lb•ft
(407-542 N•m)
16
Tang Type
Washer **
200-275 lb•ft
(271-373 N•m)
Trailer
12
1/4 Turn
2-5/8”
(66.7 mm)
and over
300-400 lb•ft
(407-542 N•m)
16
* If dowel pin and washer (or washer tang and nut flat) are not aligned, remove the washer, turn it over, and reinstall. If
required, loosen the inner (adjusting) nut just enough for alignment.
** Bendable type washer lock only: Secure nuts by bending one wheel nut washer tang over the inner and outer nut. Bend
the tangs over the closest flat perpendicular to the tang.
TABLE 1
TMC RP 618 © 2003 – TMC/ATA – Reprinted with Permission