60-Inch Tapered Leaf Spring
Component Check
No lubrication is required on the 60-inch tapered leaf
spring rear suspension.
Inspect the rear shackle brackets for bushing wear or
cracks.
Inspect the stabilizer bar, if present, for irregular
bushing wear or cracks in the brackets. Check the
rubber helper spring, if present, for cracks.
Freightliner AirLiner Component
Clearance Check
Check that the air line support brackets are posi-
tioned so the air lines do not rub against anything.
Reposition any configurations that could contact and
result in friction and wear. There must be at least 1
inch (25 mm) clearance around the rubber air spring
when inflated. If the clearance is less than 1 inch (25
mm), relocate the obstructing parts.
CAUTION
Failure to relocate obstructing parts could result
in damage to the air spring.
Freightliner AirLiner Component
Inspection and Operation Check
WARNING
Inspect the components and check their operation
as described below. Failure to perform these in-
spections and checks could result in separation of
worn suspension components and loss of vehicle
control, possibly causing personal injury or death,
or property damage.
1.
Chock the front tires. Raise the rear of the ve-
hicle so the tires just clear the ground and the
suspension is fully extended. Place safety stands
under the vehicle frame.
2.
Squeeze all air springs to check for complete
deflation.
3.
Inspect the air spring piston for cracks, chips,
and broken areas. Check the air bag for rips,
tears, and holes. Verify that the air spring assem-
bly does not leak.
4.
Check the axle connection welds (beam seat to
equalizing beam) and axle adapter to axle for
cracks. If welds are cracked, grind them out and
reweld the parts.
5.
Move the axle up and down while checking for
signs of looseness due to worn parts at the front
pivot connections. Replace any worn parts.
6.
Inspect the shock absorbers for oil leaks and
worn rubber bushings. Replace the shock ab-
sorbers and/or rubber bushings if wear or dam-
age is noted.
7.
Inspect the stabilizer bar, if so equipped, for ir-
regular bushing wear or cracks in the brackets.
The stabilizer bar is optional on 10,000- and
15,000-pound AirLiner suspension systems.
8.
Remove the safety stands and lower the rear of
the vehicle to the ground. Run the engine until
air pressure of at least 100 psi (689 kPa) is
maintained throughout the system.
9.
Check that all air springs are inflated.
Freightliner AirLiner Control Rod
Check
1.
Without disconnecting the control rods, use your
hand to attempt to move each of the control rod
f320023a
05/27/93
1
2
3
4
5
A
A. 1/8 inch (3 mm) Clearance
1.
Frame Fasteners
2.
Frame Rail
3.
Pry Bar
4.
Equalizer
5.
Equalizer Bracket
Fig. 3, Top View of the Equalizer
Suspension
32
Business Class M2 Maintenance Manual, August 2015
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Property of American Airlines
