freightliner M2 Plus Maintenance Manual page 77

Suspension
A
05/27/93
A. 1/8 inch (3 mm) Clearance
1. Frame Fasteners
2. Frame Rail
3. Pry Bar
Fig. 3, Top View of the Equalizer
52-Inch Multi-leaf Spring
Component Check
No lubrication is required on the 52-inch multi-leaf
spring rear suspension.
Inspect the stabilizer bar, if present, for irregular
bushing wear or cracks in the brackets. Check the
rubber helper spring, if present, for cracks. Inspect
the spring leaves for cracks, gouges, wear, or
abnormal bends.
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.
Inspect the spring leaves for cracks, gouges, wear,
or abnormal bends.
Business Class M2 Plus Maintenance Manual, 02/10/2023
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4. Equalizer
5. Equalizer Bracket
Freightliner AirLiner Component
Clearance Check
Check that the air line support brackets are
positioned 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
3
air spring when inflated. If the clearance is less than
1 inch (25 mm), relocate the obstructing parts.
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Failure to relocate obstructing parts could result
in damage to the air spring.
Freightliner AirLiner Component
Inspection and Operation Check
Inspect the components and check their operation
as described below. Failure to perform these
inspections 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
vehicle 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
assembly 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
absorbers and/or rubber bushings if wear or
damage is noted.
NOTICE
WARNING
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