Scotseal installation tooling guide

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Wheel bearing adjustment procedure

Manual adjustment

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 adjusting nut torque

Initial back off

Final adjusting nut torque

Axle type

Back off

Threads per inch

Final back off

Jam nut torque

Nut size

Torque Specifications

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

200 lb?ft (271N?m) While rotating wheels

One full turn

50 lb?ft (68N?m) While rotating wheels

Steer (front) non-drive

Drive

12

1/6 Turn * Install cotter pin to

18

1/4 Turn * lock axle nut in position

14 18

1/2 Turn

Less than 2 5/8" (66.7mm)

200-300 lb?ft (271-407 N?m)

12

Dowel type

300-400 lb?ft

washer

(407-542 N?m)

1/4 Turn

16

Tang type

200-275 lb?ft

washer**

(271-373 N?m)

Trailer

12 16

1/4 Turn

2 5/8" (66.7mm) and over

300-400 lb?ft (407-542 N?m)

Acceptable end play

Step 8

.001"-.005" (.025mm- .127mm)

As measured per procedure with dial indicator

* 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 hang.

Printed with permission of the TMC, Reference RP618

PreSet wheel bearing adjustment procedure

ConMet PreSet hub assemblies are equipped with specially, half-toleranced bearings and a spacer, and require a specific bearing adjustment procedure. Use the OEM seal, Scotseal PlusXL, when servicing a PreSet hub assembly.

1) Lubricate the wheel bearing with clean axle lubricant of the same type used in the axle sump or hub assembly. Never use an impact wrench when tightening or loosening lug nuts or bolts during this procedure.

2a) For one-piece spindle nut systems, torque the nut to a minimum of 250 ft. lbs. Do not back off the spindle nut. Advance the nut until engagement takes place and the nut is locked.

2b) For a double nut or jam nut system, torque the inner nut to 300 ft. lbs. Do not back off the spindle nut. Install the outer nut with 200 ft. lbs. of torque.

Note: Be sure to engage any locking device.

2c) Per ConMet Service Manual, rev C, 1-2008, ConMet does not recommend the use of a one-piece castellated type nut system for use with PreSet hubs.

End play verification procedure

Wheel bearing end play is the free movement of the wheel assembly along the spindle axis. It is recommended, for verification purposes, that wheel bearing end play be measured with a dial indicator.

Step 1 Make sure the brake drum to hub fasteners are tightened to the manufacturers' specifications.

Step 2 Attach a dial indicator with its magnetic base at the bottom of the hub or brake drum.

Step 3 Adjust the dial indicator so that its plunger or pointer is against the end of the spindle with its line of action approximately parallel to the axis of the spindle.

Note: For aluminum hubs, attach the magnetic base of the indicator to the end of the spindle with the plunger against the hub or brake drum.

? SKF and Scotseal are registered trademarks of the SKF Group. ? PreSet and ConMet are registered trademarks of Consolidated Metco, Inc. ? TFO and Trouble-Free Operation are registered trademarks of SKF Group.

?SKF Group 2010 Printed in U.S.A.

457373

(Revised 10/10)

Step 4 Set the dial indicator to zero by rotating the gauge face so the zero mark lines up with the gauge needle. For digital indicators, push the zero-out button.

Step 5 Grasp the wheel assembly at the 3 o'clock and 9 o'clock positions, while oscillating it to seat the bearings. Read bearing end play as the total indicator movement.

Note: If end play is not within specifications, repeat wheel bearing adjustment procedure until end play is within proper range.

SKF VSM 890 N. State Street Suite 200 Elgin, IL 60123 800-882-0008 vsm.

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