Install the nuts and bolts in the clamps on the tie rod. The
clamps should be positioned 1/4-inch (6.35 mm) from the end
of the tie rod tube. Tighten the nuts and bolts. Figure 33.

Install the key in the slot at the tapered end of the arm. Press
the key into slot. Do not mix the arm key and slot types.

앫 For a 5/8"-11 clamp bolt on a tie rod tube 2-2.5-inches in
diameter: 80-90 lb-ft (109-122 N폷m). @

앫 For a square key, position flush to the shoulder of the arm
taper.

앫 For a 3/4"-10 clamp bolt: 155-175 lb-ft (210-237 N폷m).
@

앫 For a woodruff key, position in the slot provided.
2.

Install the tie rod arm in the knuckle.

Figure 33

The clamp
should be
1/4" (6.35 mm)
from the end
of the tube.

CAUTION
Tighten the tie rod arm nuts to the specified torque. If the nuts
are not tightened to the specified torque, the tie rod arm,
Pitman arm or knuckle will be damaged.
3.

Install the nut that fastens the tie rod arm to the knuckle.
Tighten the nut to 775-1050 lb-ft (1051-1424 N폷m) and up to
1450 lb-ft (1965 N폷m) to align the cotter pin.

4.

Install the cotter pins. If the holes are not aligned, tighten the
nut to the next hole in the nut. Do not loosen the nut to install
the cotter pin.

TIE ROD
END
4007897b

5.

Check and, if necessary, adjust toe-in. Refer to the procedures
in this publication.

Install the Tie Rod Assembly and Tie Rod Ends
The tie rod has right-hand threads on one end and left-hand threads
on other end. Verify that the correct tie rod ends are installed on the
tie rod.
1.

Figure 33

3.

Clean and dry the tie rod end taper and the tie rod arm tapered
hole.

4.

Connect the tie rod ends into the tie rod arms on the knuckle.

5.

Install the nuts that fasten the tie rod ends to the tie rod arms.
Tighten the nuts to 160-215 lb-ft (217-292 N폷m) and up to
320 lb-ft (434 N폷m) to align the cotter pin. Figure 34. @

If removed, install the tire rod ends on the tie rod. Install the tie
rod ends to the position marked during removal. Figure 32.
앫 If new tie rod ends are installed: Thread the tie rod ends
equally on each side of the tie rod to the overall required
length.

(16579)
Printed in USA

Copyright Meritor, Inc., 2016

TP-15123
Issued 01-16
Page 17

Table I: Original Stop Bolt Setting

Figure 34

Axle

Turn Angle

Stand Out Length

FH941

MTA-51

L=1.906″*

FH946

MTA-12

L=TBD*

*Re-use the stop bolt. Verify the length prior to removal from the
unitized wheel-end knuckle.
TIE ROD ARM

For power steering systems, the stop bolt must not touch the beam.
The stop bolt must always have a minimum clearance of 0.125-inch
(3 mm). Figure 36.
Figure 36

TIE ROD

TIE ROD END

TWO-PIECE STEERING STOP BOLT

4003894c
Figure 34

6.

7.

AXLE
BEAM

Install the cotter pins. If the holes are not aligned, tighten the
nut to the next hole in the nut. Do not loosen the nut to install
the cotter pin.

MAXIMUM
TURN
ANGLE

Check and, if necessary, adjust toe-in. Refer to the procedures
in this publication.

STOP
SCREW
BOSS

0.125" (3 MM)
SPACER

Adjust the Steering Stop
TWO-PIECE
STOP BOLT
ASSEMBLY

CAUTION
In power steering systems, the hydraulic pressure should
relieve or “drop off” at the end of the steering stroke (with
0.125-inch or 3 mm minimum clearance at the stop bolt). If the
pressure does not relieve, the components of the front axle will
be damaged.
Return the stop bolt to the original setting. Stop bolt length is shown
in Figure 35.

Figure 36

For manual steering systems, Meritor recommends a stop bolt
clearance of 0.125-inch (3 mm). Stop bolt contact is acceptable if
no other stops are used for the maximum turn angle of the steering
knuckle. Figure 36.
1.

Place a 0.125-inch (3 mm) spacer between the stop bolt and
the boss on the axle beam.

2.

Turn the steering wheel until the boss on the axle beam
touches the spacer in front of the stop bolt. Measure the turn
angle. Figure 36.

3.

If the maximum turn angle does not meet vehicle
manufacturer’s specifications, correct the maximum angle. In a
power steering system, adjust the pressure relief. In a manual
steering system, follow guidelines and specifications from the
vehicle manufacturer.

4.

When the maximum turn angle is correct, loosen the stop bolt
jam nut. Figure 36. Insert a 0.125-inch (3 mm) spacer and
adjust the stop bolt. Tighten the jam nut to 65-85 lb-ft
(68-101 N폷m). @

KNUCKLE

AXLE
BEAM
NUT
STOP
BOLT

JAM NUT
4003929a

Figure 35

STOP
BOLT
LENGTH

STOP BOLT

4012363a
Figure 35

TP-15123
Issued 01-16
Page 18

Copyright Meritor, Inc., 2016

(16579)
Printed in USA

Adjust the Pressure Relief in the Power Steering
System (Setting Maximum Turn Angle)

Install the Torque Plate to the Knuckle Assembly
1.

The pressure relief in the power steering system stops or reduces
forces applied to the axle when the wheel is moved in the full turn
position.

Verify the LH and RH positions and orientations for each torque
plate. The face with the added wing material should be to the
inboard side. Figure 38.

Figure 38

Check the pressure relief if the steering arm is damaged or the
power steering gear is serviced.

Check to
ensure the
brake angle
is correct.

Two types of systems are used to adjust the pressure relief.
앫 Mechanical stop on the Pitman arm or in the assist cylinder

TORQUE
PLATE

SPINDLE

앫 Hydraulic pressure relief in the power steering gear

Install the ABS Sensor
NOTE: The new replacement knuckles and spindles should already
have the ABS bushings pre-installed. The ABS bushing should have
a 0.87-inch (22 mm) standout from the knuckle flange face.

4012483a
Figure 38

1.

Apply a light coat of grease to the bore of the ABS bushing.

2.

2.

Squeeze the spring clip and install it into the ABS bushing from
the inside face. Ensure that the tabs are bottomed out.
Figure 37.

Check the brake angle for the axle specification. Refer to Table
A through Table H in the Kits section of this publication for
brake angle information.

3.

Verify that the torque plate bolt holes and ABS holes are
aligned with each other.

4.

For FH941 and FH946 model axles, install the bolts from the
outside face and the washers and nuts on the inside face.
Tighten the nuts to 310-400 lb-ft (420-540 N폷m). Figure 39.

Figure 37

Squeeze
spring clip
to start in
the bore.

@

Figure 39

BOLT

WASHER
NUT

Tabs must bottom
out against the
bushing.
4012484a
Figure 39

4012482a
Figure 37

3.

5.

Grease the inside diameter of the spring clip and ABS sensor
body. Push the ABS sensor in until it bottoms out.

(16579)
Printed in USA

For the MC14MC16 axles, install the bolts through both the
torque plate and the spindle and into the threaded holes in the
frame. Ensure that ABS sensor is installed prior to clamping the
parts together. Tighten the bolts to 326-420 lb-ft
(440-570 N폷m). @

Copyright Meritor, Inc., 2016

TP-15123
Issued 01-16
Page 19

Install the Conventional Wheel End

5.

Adjust the wheel bearings. Refer to the wheel bearing
adjustment procedure in this section.

6.

Install the gasket and hubcap with the capscrews and flat
washers. Tighten the capscrews to 6 lb-ft (8.13 N폷m)
maximum using a star pattern. Then use a star pattern to apply
a final torque of 12-18 lb-ft (16-24 N폷m). For models with CR
Zytel hubcaps, apply a final torque of 12-16 lb-ft (16-22 N폷m).

Hub Assembly Installation — Grease-Lubricated Wheel Ends
1.

Lubricate both the inner and outer wheel bearings. Using a
bearing grease packer or by hand, force the specified grease
into the cavities between the rollers and cage.

2.

Insert the inner wheel bearing into the hub bore.

3.

Install a new grease/oil seal using the correct seal driver. Refer
to Figure 51.

4.
5.

@

7.

Carefully install the hub and rotor assembly onto the spindle.
Ensure that the assembly is correctly seated.
Pack the hub between the bearing cups with the specified
grease, up to the level of the smallest diameter of the cups
360 degrees around. Figure 40.

Remove the fill plug and add the specified oil to the correct
level. Reinstall the fill plug.
NOTE: Approximately 21.3 ounces (630 ml) of oil is required to
fill each hub.

8.

Rotate the wheel end to ensure distribution of the oil.

9.

Recheck the level on the cap. If the oil level is not at the
specified level on the cap, remove the fill plug. Add the
specified oil until the oil is at the correct level. Figure 41.

Figure 40

LUBE
Figure 41

4003936a
Figure 40

OIL LEVEL

6.

Insert the outer wheel bearing into the hub bore.

7.

Adjust the wheel bearings. Refer to the wheel bearing
adjustment procedure in this section.

8.

Install the gasket and hubcap with the capscrews and flat
washers. Tighten the capscrews to 6 lb-ft (8.13 N폷m)
maximum using a star pattern. Then use a star pattern to apply
a final torque of 12-18 lb-ft (16-24 N폷m). For models with CR
Zytel hubcaps, apply a final torque of 12-16 lb-ft (16-22 N폷m).

4003937a
Figure 41

Adjust the Wheel Bearings
1.

Secure the hub assembly on the spindle using the outer wheel
bearing adjusting nut. The adjusting nut must be installed so
that the nipple faces outward toward the hubcap. Tighten
finger-tight.

2.

Tighten the adjusting nut to 150 lb-ft (203 N폷m) while rotating
the hub. Rotate the hub a minimum of five times while
tightening the nut. This will ensure correct bearing-to-hub bore
contact. @

3.

Loosen the adjusting nut completely. Retighten to 50 lb-ft
(68 N폷m) while rotating the hub. @

4.

Back off the outer wheel bearing adjusting nut 1/4 turn.

@

Hub Assembly Installation — Oil-Lubricated Wheel Ends
1.

Lubricate both the inner and outer bearings with oil.

2.

Insert the inner wheel bearing into the hub bore. The bearing
cups must be pressed tight against the shoulder in the hubs.

3.

Install a new oil seal using the correct driver. Refer to
Figure 51.

4.

Install the hub onto the spindle. Install the outer wheel bearing
cone in the hub. Install the adjusting nut.

TP-15123
Issued 01-16
Page 20

Copyright Meritor, Inc., 2016

(16579)
Printed in USA

5.

Install the D-style pierced lock ring so that it passes through
the flat on the spindle. Ensure that the adjusting nut nipple
engages one of the through holes on the lock ring.

6.

Install the D-style lock washer so that it passes through the flat
on the spindle.

7.

Install the outer wheel bearing jam nut. Tighten to 200-300
lb-ft (271-407 N폷m). @

8.

Measure bearing end play with a dial indicator. Bearing end
play should be 0.001 to 0.005-inch (0.025-0.127 mm).

9.

If necessary, adjust bearing end play to obtain the correct dial
indicator reading.

6.

Measure the end play by pushing and pulling on each side of
the hub while looking at the dial indicator. The end play is the
total travel observed. Do not push or pull at the top and the
bottom of the hub. Pushing or pulling at the top and the bottom
will not give a true reading of the end play.
앫 If the end play is not within 0.001-0.005-inch
(0.025-0.127 mm): Adjust the wheel bearings.

7.

If necessary, adjust the wheel bearings according to the
procedure in Step 11.

8.

Bend the lock washer off the flats of the jam nut. Remove the
jam nut, jam nut washer and pierced lock ring.

10. Bend one side of the D-style lock washer over the outer wheel
bearing jam nut to lock it in position.

When performing a wheel bearing adjustment:

Install the Brake Assembly

앫 Always use the correct size wrench socket.

Install the disc brake caliper assembly onto the torque plate. Refer
to Maintenance Manual MM-0467, EX+™ Disc Brake, for more
information.

앫 Always use a torque wrench to tighten the adjusting nuts to
their correct adjusting torques.

WARNING

1.

Park the vehicle on a level surface. Block the wheels to prevent
the vehicle from moving.

앫 Never attempt to tighten or loosen the adjusting nuts by
either hitting them directly with a hammer or by hitting a
chisel or a drift placed against them with a hammer. Failure
to do this can damage the nuts, prevent a correct wheel
bearing adjustment from being achieved, and cause
possible loss of vehicle wheel-end equipment and serious
personal injury.

2.

Use a jack to raise the vehicle so that the wheels to be serviced
are off the ground. Support the vehicle with safety stands.

9.