Freightliner Cargo Maintenance Manual — part 18
3.
Using lithium 12 hydroxy stearate grease (NLGI
grade 1 or 2, with EP additives), lubricate until
new grease can be seen at all four U-joint seals.
IMPORTANT: Fresh lubricant must be seen es-
caping from
all four bearing cup seals of each
U-joint.
On full-round yokes, if most of the grease being
added to a U-joint can be seen escaping from
just one of the U-joint seals, bend the tabs of
the lockstrap away from the heads of the bear-
ing cup capscrews, then check the torque on
the bearing cup capscrews at that seal. Tighten
the bearing cup capscrews as follows:
•
5/16–24 capscrews: 24 lbf·ft (32 N·m)
•
3/8–24 capscrews: 37 lbf·ft (50 N·m)
Bend the lockstrap tabs up, against a flat side of
each capscrew. 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 exam-
ine the seal for damage. If the seal is damaged,
replace the complete U-joint assembly.
If grease does not appear at one of the seals,
use a screwdriver to pry the U-joint trunnion
away from the non-purging seal, or tap the
driveshaft or yoke with a plastic or rawhide mal-
let (on the side opposite the dry seal), while
continuing to apply gun pressure. If grease still
does not appear, bend the tabs of the lockstrap
away from the heads of the bearing cup cap-
screws, then loosen the bearing cup capscrews
(at the bearing with the dry seal) to relieve seal
f410012a
05/27/93
Attempt to bend the sleeve yoke and splined shaft back
and forth.
Fig. 2, Slip-Joint Spline Wear Check
f410110b
06/13/96
A
A
B
C
C
D
A. Measurement: 3" (76 mm)
B. Measurement: 0.005" (0.127 mm)
C. Measurement: 0.010" (0.254 mm)
D. Measurement: 0.015" (0.381 mm)
Fig. 3, Driveshaft Runout Specifications
f410050a
10/20/93
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. 4, Slip-Joint and U-Joint Lubricating
Driveline
41
Cargo Maintenance Manual, January 2000
41/3
tension. Lubricate the U-joint until the old
grease is purged, then tighten the capscrews to
the above specifications, and bend the tabs of
the lockstrap against a flat side of each cap-
screw. If the bearing will not take grease, re-
place the U-joint assembly; see Group 41 of the
Cargo Workshop Manual.
4.
Check the old grease. If it appears rusty, gritty, or
burned, replace the U-joint assembly. See Group
41 of the
Cargo Workshop Manual
.
5.
Wipe any excess grease from the seals and
grease fittings.
Slip-Joint Spline Lubrication
1.
Wipe all old grease and dirt from the slip-joint
grease fitting. See
, Ref. 1.
2.
Use a hand-type grease gun or a high-pressure
gun with a low-pressure adaptor, to lubricate the
slip-joint. Using lithium 12 hydroxy stearate
grease (NLGI grade 1 or 2, with EP additives),
lubricate until fresh grease appears at the
pressure-relief hole in the yoke plug. Then cover
the relief hole with your finger, while continuing
to lubricate until fresh grease appears at the slip-
joint seal (
, Ref. 6). This ensures complete
lubrication of the splines.
3.
Wipe any excess grease from the pressure-relief
hole, slip-joint seal, and grease fitting.
Driveline
41
Cargo Maintenance Manual, January 2000
41/4
Title of Maintenance Operation (MOP)
MOP Number
Air Brake Valve Disassembly, Clean, and Inspection, Bendix E–6, QR–1, and
ST–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–14
Air Brake Valve Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–03
Air Dryer Check, Bendix AD–9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–11
Air Dryer Desiccant Replacement, Bendix AD–9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–12
Air Dryer Inspection, Bendix AD–9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–01
Air Reservoir Automatic Drain Valve Disassembly, Clean, Inspection, and
Lubrication, Bendix AD–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–13
Automatic Slack Adjuster Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–08
Automatic Slack Adjuster Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–10
Automatic Slack Adjuster Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–09
Brake Chamber Inspection (All Models). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–06
Camshaft Bracket Bushing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–07
Foot Brake Valve Actuator Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–02
Quick Release and Flipper Valves Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–05
Relay Valve Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–04
Brakes
42
Index, Alphabetical
Cargo Maintenance Manual, January 2000
42–01 Air Dryer Inspection,
Bendix AD–9
1.
Check the reservoirs for moisture. A small
amount (teaspoon or less) is normal. Larger
amounts may mean that the desiccant needs to
be replaced. Check the mounting and connecting
lines.
2.
Tighten the fasteners attaching the air dryer to
the vehicle. Use the following torque values:
•
28 lbf·ft (38 N·m) for SAE grade 5, 3/8–16
fasteners
•
135 lbf·ft (183 N·m) for SAE grade 5,
5/8–11 fasteners
3.
Check all air lines, fittings, and electrical connec-
tions for damage, leakage, or looseness.
4.
Replace damaged or leaking parts, and tighten
loose fittings or electrical connections.
42–02 Foot Brake Valve
Actuator Lubrication
1.
Clean any dirt, gravel, and other foreign debris
from the plunger boot and brake base bracket.
2.
Check the brake plunger boot for cracks, holes,
or deterioration. Replace if necessary.
3.
Lift up the edge of the brake plunger boot and
check the plunger for existing lubrication. If the
plunger is dry, remove it by removing the cotter
pin from the clevis pin and pulling the clevis pin
out. Remove the piston rod and boot. Lift out the
plunger. Lubricate the plunger and the tip of the
piston rod with barium grease part number BW
246671, or Penzoil Adhezoplex EP 2. Install the
piston rod, boot, clevis pin, and cotter pin.
If the plunger has grease on it, lift the edge of
the brake plunger boot enough to apply 2 to 4
drops of light oil around the brake plunger. Do
not over-oil. Install the plunger boot.
4.
Lubricate the clevis pin with light oil.
5.
Check for leakage; see Group 42 of the
Cargo
Workshop Manual
for instructions.
42–03 Air Brake Valve
Operation Check
Check for proper operation; see Group 42 of the
Cargo Workshop Manual
.
42–04 Relay Valve Check
Chock the tires. Start the engine and run it long
enough to pressurize the air system to at least 80 psi
(550 kPa), then turn off the engine.
Repeat as necessary, to maintain 80 psi (550 kPa)
pressure during this check.
Clean off road grime from the relay valve, and any
debris from the valve exhaust port. Listen for air
leakage around the fittings or exhaust port. Tighten
the fittings as necessary. Use two wrenches to avoid
twisting the tubing.
If the valve fails this check, or is damaged, repair or
replace it; see Group 42 of the
Cargo Workshop
Manual
for instructions. Remove the chocks from the
tires.
42–05 Quick Release and
Flipper Valves Check
Chock the tires. Start the engine and run it long
enough to pressurize the air system to at least 80 psi
(550 kPa), then turn off the engine.
Repeat as necessary, to maintain 80 psi (550 kPa)
pressure during these checks.
Clean off road grime from the valves, and any mate-
rial from the valves’ exhaust ports. Listen for air leak-
age around the fittings and exhaust ports. Tighten
the fittings, as necessary. Use two wrenches to avoid
twisting the tubing.
If any valve fails this check, or is damaged, repair or
replace it; see Group 42 of the
Cargo Workshop
Manual
for instructions. Remove the chocks from the
tires.
Brakes
42
Cargo Maintenance Manual, January 2000
42/1
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