Freightliner Cascadia. Instruction - page 26
Grade 1 (6% 12-hydroxy lithium stearate grease)
chassis grease, apply clean grease at the grease
fittings until old grease is forced out of the
socket.
46–06 Rack and Pinion
Steering Gear Inspection
WARNING
All steering system components are critical for
safe operation of the vehicle. Failure to maintain
the steering system as specified may result in
loss of steering control, which could lead to per-
sonal injury and property damage.
Inspect the rack and pinion steering system as de-
scribed below, and repair or replace any components
that are worn or damaged.
shows the com-
ponents of the rack and pinion steering system.
1.
Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2.
Check the steering I-shaft U-joints for evidence
of looseness or binding. If any is found, replace
the I-shaft.
3.
Check the steering I-shaft slip joint for evidence
of lateral movement, looseness, or binding. If any
is found, replace the I-shaft.
4.
Jack up one axle end at a time, and move the
tire in and out by hand to check the tie rod ends
for free play. No free play is allowed. If the outer
tie rod ends are damaged or worn, replace them.
See Group 46 of the Cascadia Workshop
Manual for replacement instructions.
5.
Check the steering gear mounting bolts for secu-
rity.
6.
Check that the outer tie rod castle nuts are tight,
and the cotter pins are properly installed.
IMPORTANT: Do not remove the bellows unless
they are damaged and require replacement, or
there is evidence of a loose inner tie rod or
there is hydraulic fluid leak.
7.
Use a clean rag to remove all dirt and debris
from the bellows. Check the bellows for holes or
tears. If any are found, replace the bellows.
8.
Check for evidence of hydraulic fluid leakage
from the bellows. If hydraulic fluid is found to be
leaking from within the bellows, replace the
steering gear.
9.
Check the input shaft for any leakage around the
input shaft seal cover. If there is evidence of
leakage from inside the cover, remove it and re-
place the input shaft seal. See Group 46 of the
Cascadia Workshop Manual for instructions.
Check the steering system pressure and return
lines and fittings for leaks and damaged lines or
hoses. Repair or replace lines, hoses, and fit-
tings as necessary.
f461071
1
11/28/95
1.
Sector Shaft Grease Fitting
Fig. 2, Steering Gear Lubrication
2
f461072
11/27/95
1
1.
Grease Fitting at Pitman Arm
2.
Grease Fitting at Axle Steering Arm
Fig. 3, Drag Link
Steering
46
46/3
NOTICE
Do not tighten the tube fittings on the hard trans-
fer lines. Tightening the tube fittings can cause
tearing of the O-ring seal and increased fluid leak-
age.
10. Check the tube fittings on the hard transfer lines
of the gear, see
, Item 15. If there is leak-
age from either of the fittings, replace the steer-
ing gear.
f462151
11
17
12
13
14
1
6
7
5
5
9
9
4
4
3
3
18
19
20
21
23
2
10
22
15
16
07/24/2009
8
8
1.
Steering Tie Rod Arm
2.
Power Steering Fluid Lines
3.
Large Bellows Clamp
4.
Bellows
5.
Small Bellows Clamp
6.
Driver-Side Outer Tie Rod
7.
Tie Rod Jam Nut
8.
Inner Tie Rod Flat
9.
Inner Tie Rod Ball Joint
10. Input Shaft Seal Cover
11. I-shaft Upper Yoke
12. I-shaft Lower Yoke Boot Clamp
13. I-shaft Lower Yoke Boot
14. I-shaft Lower End Yoke
15. Transfer Line Tube Fittings
16. Power Steering Fluid Line
Fittings
17. I-shaft Slip Joint
18. Transfer Lines
19. Rack and Pinion Gear
20. Pinch Bolt
21. Tie Rod Clamp
22. Tie Rod Clamp Nut
23. Passenger-Side Outer Tie Rod
Fig. 4, Rack and Pinion Steering System
Steering
46
46/4
46–07 Bellows Replacement,
Rack and Pinion
Steering Gear
1.
Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2.
Raise the front wheels off the ground and sup-
port the vehicle with jack stands.
3.
Remove both wheels from the steer axle.
NOTE: A Tiger Tool Slack Adjuster Puller, part
number 10406, may be used to assist with re-
moval of the outer tie rods.
4.
Disconnect the outer tie rods from the steering
arms, as follows.
4.1
Remove the cotter pins and castellated
nuts.
4.2
On the driver’s side, loosen the jam nut.
See
. Note the number of exposed
threads and the position of the outer tie
rod to ease installation.
4.3
Disconnect the outer tie rods from the
steering arms.
5.
Use brake cleaner to remove dirt and debris from
both bellows and surrounding areas.
6.
Remove the small and large Oetiker clamps from
both bellows. Discard the clamps.
7.
Disconnect the outer tie rods from the inner tie
rods. If necessary, use a backup wrench on the
inner tie rod flat to turn the inner tie rod. See
.
8.
Remove the bellows from both sides of the gear.
NOTE: A thin film of leftover Terostat MS 939 on
the rack housing is acceptable when installing
the new bellows.
9.
If the housing has Terostat MS 939 on it from a
previous replacement of the bellows, remove as
much of the leftover Terostat from the housing
sealing surface as possible. Wipe down the
housing with brake cleaner to remove all remain-
ing dirt and debris.
IMPORTANT: Only apply grease to the rack
shaft on the driver side. Do not apply grease to
the teeth of the rack shaft. Do not apply grease
to the shaft on the passenger side.
10. Turn the wheels all the way to the right to fully
expose the driver-side rack. Without applying
grease to the teeth of the rack shaft, evenly
apply a light film of Renolit CX-FO 20 grease to
the metal surfaces covered by the driver-side
bellows.
NOTICE
Two syringes of the Terostat MS 939 are included
in the Bellows Service Kit. Ensure only Terostat,
which is white in color, is applied to the rack
housing.
Do not allow Terostat MS 939 sealant to come into
contact with the inner tie rods. Mistakenly apply-
ing sealant to the inner tie rods may cause dam-
age to the bellows and the gear. See
IMPORTANT: Terostat MS 939 sealant must be
applied at a temperature between 41 and 104°F
(5 and 40°C) to effectively seal steering gear
components. Because Terostat sealant sets
within ten minutes of application, the bellows
must be installed within ten minutes of sealant
application to ensure a good seal.
11. Evenly apply Terostat MS 939 sealant to the
outer diameter of the rack housing where the
large ends of the bellows seat on the gear hous-
ing. See
.
05/30/2012
f462241
A
B
A. Do not apply Terostat near the small end of the
bellows.
B. Only apply Terostat to the gear where the large end
of the bellows seats.
Fig. 5, Apply Terostat To Large End of Bellows
Steering
46
46/5
NOTICE
Improper installation may cause moisture and
contaminants to enter the gear, which may result
in severe damage.
12. Install the new bellows on the gear. Ensure the
bellows are seated properly on the gear housing
and inner tie rods.
13. Rotate the bellows back and forth approximately
15 degrees to evenly disperse the sealant be-
tween the bellows and the gear housing.
14. Install new Oetiker clamps on each of the bel-
lows as follows.
NOTICE
Fully opening an Oetiker clamp may cause perma-
nent damage and render it ineffective.
14.1
Rotate the ears of the large Oetiker
clamp forward on the bellows to avoid
pinching the clamp in the next step.
14.2
Ensure the large Oetiker clamp is prop-
erly seated in the clamp groove on the
bellows. Align the large Oetiker clamp ear
with the small clamp ear. Both clamp ears
should be aligned with the rack housing
casting rib. See
.
NOTICE
Do not over-tighten the Oetiker clamps. Over-
tightening may lead to stretching of the clamp,
which could allow moisture intrusion and corro-
sion. If an Oetiker clamp stretches, remove and
discard the clamp and install a new clamp.
All three barbs on the clamp must be engaged. If
all three barbs are not engaged after crimping, re-
move and discard the clamp and install a new
clamp. Oetiker clamps must be adequately
crimped and the bellows must be tightly secured
to the gear housing to prevent moisture intrusion
and corrosion.
14.3
Using an Oetiker clamp tool like the one
shown in
, crimp the small and
large Oetiker bellows clamp ears until the
ear width is 0.08 to 0.16 in (2 to 4 mm).
See
and
.
15. Remove excess grease from the bellows and the
gear housing.
11/30/2011
f462214
Evenly apply a bead of Terostat MS 939 sealant where the
large ends of the bellows seat on the gear housing.
Fig. 6, Terostat MS 939 Sealant Application
09/09/2009
f462176
1 2
3
4
5
1.
Inner Tie Rod
2.
Small Oetiker Clamp
3.
Bellows
4.
Large Oetiker Clamp
5.
Housing Casting Rib
Fig. 7, Oetiker Clamp Alignment
Steering
46
46/6
