Capscrew

2

Hubcap

3

Outer Nut

4

Lock Washer

5

Lock Ring

6

Inner Nut

7

Conventional or PreSet Hub

8

Wheel Stud

9

Rotor-to-Hub Capscrew

10

Rotor

11

EX+ Brake

12

Torque Plate-to-Knuckle Capscrew

13

Torque Plate

14

Torque Plate-to-Caliper Capscrew

15

Knuckle

16

Nut

17

PRO-TORQ™ Nut for PreSet Hub

TP-15123
Issued 01-16
Page 6

Copyright Meritor, Inc., 2016

(16579)
Printed in USA

Conventional Hub — MC14 and MC16 Series Tag Axle with EX+ Brakes
Figure 8

13
15
11
10

16

2

3

4

5

14

9

8

12

6

1

7
4012342a
Figure 8

Item

Description

1

Capscrew

2

Hubcap

3

Outer Nut

4

Lock Washer

5

Lock Ring

6

Inner Nut

7

Rotor-to-Hub Capscrew

8

Wheel Stud

9

PreSet Hub

10

Rotor

11

EX+ Brake

12

Torque Plate-to-Spindle Capscrew

13

Torque Plate-to-Caliper Capscrew

14

Torque Plate

15

Spindle

16

PRO-TORQ™ Spindle Nut

(16579)
Printed in USA

Copyright Meritor, Inc., 2016

TP-15123
Issued 01-16
Page 7

Unitized Wheel End — FH Series Front Tag Axle with EX+ Brakes
Figure 9

13

14

10
9
6

7

8

15

5
3
4

1

11

12

2

4006158a

Figure 9

Item

Description

1

Wheel Adapter Capscrew

2

Inspection Plug

3

Wheel Adapter

4

Wheel Stud

5

Rotor

6

Keeper

7

PRO-TORQ™ Spindle Nut

8

Thick Washer

9

Unitized Hub Bearing

10

EX+ Brake Assembly

11

Torque Plate-to-Spindle Capscrew

12

Torque Plate

13

Torque Plate-to-Brake Caliper Capscrew

14

FH Series Knuckle

15

Nut

TP-15123
Issued 01-16
Page 8

Copyright Meritor, Inc., 2016

(16579)
Printed in USA

Unitized Wheel End — MC Series Tag Axle with EX+ Brakes
Figure 10

13

14

10
9

8
5

6

3

11

4

1

12

2

7

4012343a

Figure 10

Item

Description

1

Wheel Adapter Capscrew

2

Inspection Plug

3

Wheel Adapter

4

Wheel Stud

5

Rotor

6

Keeper

7

PRO-TORQ™ Spindle Nut

8

Thick Washer

9

Unitized Hub Bearing

10

EX+ Brake Assembly

11

Torque Plate-to-Spindle Capscrew

12

Torque Plate

13

Torque Plate-to-Brake Caliper Capscrew

14

Spindle

(16579)
Printed in USA

Copyright Meritor, Inc., 2016

TP-15123
Issued 01-16
Page 9

Removal and Disassembly Procedures

2.

In this section, the unitized wheel-end specific components will
need to be removed from the axle. This will include the knuckles/
spindles, torque plates, unitized wheel-end bearing assemblies,
rotors, PRO-TORQ™ nuts and wheel adapters. The steering arm, tie
rod arm and tie rod assemblies will be reused.

Remove the cotter pin and nut that fasten the steering arm to
the knuckle. Figure 12.

Figure 12

STEERING
ARM

COTTER
PIN

Remove the Wheel-End Components
1.

Wear safe eye protection. Park the vehicle on a level surface.
Block the rear wheels to prevent the vehicle from moving.

2.

Raise the vehicle so that the axle is off the ground. Support the
vehicle with safety stands. Do not use a jack to support the
vehicle.

NUT

KEY
4000693a

Figure 12

3.

Remove the wheel and tire assembly.

4.

Remove the brake caliper assembly. Refer to Maintenance
Manual MM-0467, EX+™ Air Disc Brake. Keep these parts
and fasteners for reuse.

3.

Remove the steering arm from the knuckle. If necessary, use a
leather or plastic mallet to tap on the end of the arm and
separate the arm from the knuckle.

5.

Remove the wheel adapter and rotor. Discard these parts.

4.

Inspect the steering arm. Keep the parts for reuse.

6.

Remove the keeper from the PRO-TORQ™ nut. Use a
screwdriver to pry out the keeper arm from the groove on each
side of the nut until the keeper is released. Use a 3.5-inch
(89 mm) socket wrench to remove the PRO-TORQ™ nut.
Discard these parts.

Remove the Tie Rod Arms, Tie Rod Assembly and Tie
Rod Ends

7.

Remove the thick washer and unitized hub bearing. Discard
these parts.

8.

Repeat this procedure to remove the unitized wheel end on the
opposite side of the axle.

WARNING
Support the tie rod assembly during maintenance and service
to prevent serious personal injury and damage to components.

CAUTION

Remove the Steering Arm

Do not heat the arm to remove the tie rod assembly. Heating
the tie rod arm will soften parts. Damage to components will
result.

1.

1.

Remove the cotter pin and nut that fasten the steering arm to
the drag link. Disconnect the steering arm from the drag link.
Figure 11.

Remove the cotter pins and nuts that fasten each tie rod end to
the tie rod arms. Figure 13.

Figure 13

Figure 11

TIE ROD ARM

PITMAN
ARM

DRAG
LINK

STEERING
ARM

1000349b
TIE ROD

Figure 11

TIE ROD END
4003894c

Figure 13

TP-15123
Issued 01-16
Page 10

Copyright Meritor, Inc., 2016

(16579)
Printed in USA

2.

Disconnect the tie rod assembly from the tie rod arm. If
necessary, use a tie rod end puller to separate the tie rod end
from the tie rod arm.

3.

Disconnect any steering linkage attached to the tie rod arms.

4.

Remove the cotter pin and nut that secures the tie rod arms in
the knuckle.

Remove the Threaded King Pin Caps, Draw Keys,
King Pin and Knuckle
1.

Remove the top and bottom king pin caps. Figure 15.

Figure 15

CAP

WARNING
Use a brass or leather mallet for assembly and disassembly
procedures. Do not hit steel parts with a steel hammer. Pieces
of a part can break off and cause serious personal injury.
5.

Remove the tie rod arms from the knuckle. If necessary tap on
the end of the arm with a leather or plastic mallet to separate
the arm from the knuckle. Keep these parts for reuse.

6.

If necessary, remove the tie rod ends from the tie rod.
Figure 14.

1000030b