Freightliner Coronado 132 / 122SD. Manual — part 22
6.
Check slip joints for spline wear by moving the
sleeve-yoke and splined shaft back and forth;
see
. If the slip joint can be twisted in a
clockwise, or counterclockwise movement
greater than 0.007 inch (0.18 mm), replace both
the sleeve-yoke and the splined shaft.
7.
Examine the driveshaft tubes for dents, bends,
twists, or other damage. If any tube appears to
be damaged, refer to Section 41.00 of the
122SD and Coronado Workshop Manual for re-
pair and replacement instructions.
8.
Examine the driveshaft for evidence of missing
balance weights, and for build-up of foreign ma-
terial. Remove any foreign material. If there is
any evidence that balance weights are missing,
remove the driveshaft and have it balanced.
9.
For driveshafts with slip joints, check to be sure
the yoke plug is not loose or missing; see
Ref. 2. Repair or replace the yoke plug as
needed. If the yoke plug is missing, the splined
shaft may be hitting the plug and knocking it out;
contact your Regional Service Office for assis-
tance in determining the correct driveshaft
length.
41–02 Driveline Lubrication
Universal Joint Lubrication
NOTE: Vehicles equipped with Meritor RPL Se-
ries drivelines do not require periodic lubrication.
1.
Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2.
Wipe all old grease and dirt from each U-joint
grease fitting. See
3.
Use a hand-type grease gun, or a high-pressure
gun with a low-pressure adapter, to lubricate
U-joints. If a low-pressure adapter is not used,
U-joints may not receive enough grease.
Using lithium 12-Hydroxy stearate grease (NLGI
Grade 2, with EP additives), lubricate until new
grease can be seen at all four U-joint seals.
Fresh grease must be seen escaping from all
f410155a
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1
1
1
2
ME
R I TOR
1.
Self-Locking Capscrew
2.
Adhesive Band
Fig. 3, Meritor U-Joint Fasteners for Full-Round Yokes
f410182
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Fig. 4, Meritor RPL Series U-Joint
f410012a
05/27/93
Attempt to move the sleeve-yoke and splined shaft back
and forth.
Fig. 5, Slip Joint Spline Wear Checking
Driveline
41
41/3
four bearing-cap seals of each U-joint. On full-
round yokes equipped with a bearing cup, if most
of the grease being added to a U-joint can be
seen escaping from just one of the U-joint seals,
check the torque on the capscrews at that seal.
4.
Tighten the bearing-cup capscrews 43 lbf·ft (58
N·m). If the capscrews were already tight, or all
of the U-joint seals still do not purge, remove the
bearing cup at that seal, and examine the seal
for damage. If the seal is damaged, replace the
complete U-joint.
5.
If grease does not appear at one seal, use a pry-
ing tool to pry the U-joint trunnion away from the
non-purging seal, or tap the driveshaft or yoke
with a plastic or rawhide mallet on the side oppo-
site the dry seal, while continuing to lubricate. If
grease still does not appear, loosen the cap-
screws at the bearing with the dry seal, to relieve
seal tension. Lubricate the U-joint until new
grease is seen at the seal, then tighten the cap-
screws to the correct torque specifications. If the
bearing will not take grease, replace the U-joint.
Refer to Group 41 of the vehicle Workshop
Manual for replacement instructions.
6.
Check the purged grease. If it appears rusty,
gritty, or burned, replace the U-joint.
7.
Wipe the purged grease from the seals, and any
excess grease from the grease fitting.
Slip Joint Spline Lubrication
NOTE: Vehicles equipped with Meritor RPL Se-
ries drivelines do not require periodic lubrication.
1.
If equipped with a grease fitting, wipe all old
grease and dirt from the slip joint grease fitting.
See
2.
Use a hand-type grease gun or a high-pressure
gun with a low-pressure adapter, to lubricate the
slip joint. Add multipurpose chassis grease
(lithium 12-hydroxy stearate, NLGI Grade 2, with
EP additives) until it appears at the pressure-
relief hole in the yoke plug. Then cover the relief
hole with your finger, while continuing to apply
gun pressure until new grease appears at the
slip joint seal. See
. This ensures complete
lubrication of the splines.
3.
Wipe the purged grease from the pressure-relief
hole and slip joint seal, and any excess grease
from the grease fitting.
f410050a
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1
1
2
3
3
3
4
5
6
7
8
A
A. After grease appears, cover the pressure-relief hole
while continuing to lubricate.
1.
Slip Joint Grease Fitting (with grease gun attached)
2.
Yoke Plug
3.
Grease
4.
Half-Round Yoke
5.
Yoke Plug Pressure-Relief Hole
6.
Slip Joint Seal
7.
Full-Round Yoke
8.
U-Joint Grease Fitting
Fig. 6, Slip Joint and U-Joint Lubrication
Driveline
41
41/4
Title of Maintenance Operation (MOP)
MOP Number
Air Brake System Valve Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–01
Air Dryer Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–03
Alcohol Evaporator Cleaning and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–04
Bendix Air Dryer Desiccant Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–02
Bendix E-6 Foot Control Valve Inspection and Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–10
Brake Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–05
Dana Spicer Camshaft Bracket Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–08
Dana Spicer, Haldex, and Gunite Slack Adjuster Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–09
Meritor Camshaft Bracket Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–06
Meritor Slack Adjuster Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–07
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–00
Versajust Slack Adjuster Inspection and Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–12
WABCO System Saver Air Dryer Desiccant Cartridge Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–11
Brakes
42
Index, Alphabetical
42–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine, set the parking brake, and chock the tires.
Before working under the vehicle, always place
jack stands under the frame rails to ensure the
vehicle can not drop. Failure to follow these steps
could result in serious personal injury or death.
42–01 Air Brake System Valve
Inspection
NOTE: There is no scheduled air valve mainte-
nance on vehicles equipped with Bendix air
valves and a Bendix air dryer if the air dryer
desiccant is replaced at 350,000 miles (563 000
km). If the desiccant is not changed at 350,000
miles (563 000 km), or if the vehicle is equipped
with another air dryer, maintenance will have to
be performed to the air brake valves. See
Group 42 of the vehicle Workshop Manual for
procedures.
IMPORTANT: For vehicles equipped with an oil-
coalescing air dryer desiccant cartridge, replace
the cartridge once a year, regardless of mileage.
42–02 Bendix Air Dryer
Desiccant Replacement
IMPORTANT: For vehicles equipped with an oil-
coalescing air dryer desiccant cartridge, replace
the cartridge once a year, regardless of mileage.
AD–9
1.
Park the vehicle on a level surface, apply the
parking brakes, and chock the tires.
2.
Completely drain all air reservoirs. Air pressure
gauges should read 0 psi (0 kPa).
NOTE: The compressor discharge line may still
contain residual air pressure, open the line
slowly.
3.
Identify, tag, and disconnect the three air lines
from the end cover.
4.
Disconnect the harness connector from the
heater and thermostat assembly.
5.
Loosen the bolt that secures the upper mounting
bracket strap.
6.
Remove the two bolts and Nylok® nuts that se-
cure the air dryer to the lower mounting bracket.
Mark the position of the mounting bracket to the
end cover and mark the bolts to ease installation.
7.
Remove the upper mounting bracket strap fas-
teners, then remove the strap and the air dryer.
8.
Place the air dryer on a bench and remove the
remaining 6 bolts, 12 washers, 6 Nylok nuts, and
the air dryer housing. See
. Discard the
Nylok nuts. Remove the end-cover-to-housing
O-ring.
9.
Clamp the desiccant cartridge in a vise.
WARNING
Clamping the end cover or housing in a vise could
seriously compromise the air dryer’s ability to
hold air pressure, which could cause a failure in
the brake system, resulting in property damage,
personal injury, or death.
10. Twist the end cover counterclockwise to release
the cartridge from the end cover. Rotate the end
cover until it completely separates from the des-
iccant cartridge.
NOTE: A substantial torque, up to 50 lbf·ft (68
N·m), may be necessary to remove the desic-
cant cartridge.
NOTICE
Dirt or obstructions in the O-ring grooves can
cause an O-ring failure that will result in an air
leak.
11. Inspect the condition of the O-ring seals. If they
are cracked, crimped, or otherwise damaged,
replace them to ensure an airtight seal. Clean
the O-ring grooves of any dirt or obstruction.
Brakes
42
42/1
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