Mack M359 - Air Suspensions; Preventive Maintenance; Shock Absorbers; Transverse Torque Rods

MAINTENANCE, LUBRICATION AND SERVICE
AIR SUSPENSIONS
The following maintenance items should
be performed on all air suspensions:
Preventive Maintenance
• Visual Inspection: Inspect all
suspension components, checking for
signs of wear, damage or unwanted
movement. Look for bent or cracked
parts. Replace all worn or damaged
components as required.
• Air Spring: Inspect for chang or any
signs of spring or component damage.
Ensure that the upper bead plate is tight
against the underside of the frame.
Check for lateral slippage at the lower
air spring bracket.
• Support Beam Assembly: Inspect the
overall condition of the support beam for
dents, dings or other damage. On
Hendrickson PRIMAAX suspensions,
check the D-pin bushings for tearing or
extreme bulging. Check for metal-to-
metal contact in the bushed joints.
Replace worn or damaged components
as required.
• Frame Hanger Bracket: Inspect for any
signs of loosening or damage. On
Hendrickson PRIMAAX suspension,
check for loosening or damage at the
QUIK-ALIGN connections or longitudinal
torque rod connections. Replace worn
or damaged components as required.
• Cross Beam: Inspect for cracks,
damage, metal shavings or looseness at
the beam connections. Replace worn or
damaged components as required.
• Transverse Torque Rods: Inspect for
signs of looseness at the transverse
torque rod connections. Check bushings
for tearing or excessive bulging. Check
the transverse torque rod for dents or
bending. Replace worn or damaged
components as required.
• Shock Absorbers: Inspect for signs of
dents or leaking (oil misting is not
considered leakage). Replace worn or
damaged shocks as required.
• Tire Wear: Inspect tires for wear
patterns that might indicate suspension
damage or misalignment. Replace worn
or damaged components as required.
• Height Control Valve and Air Lines:
Check for loose, bent or damaged parts.
Check air lines for chang or leaking.
Check height control valve and air lines
for leakage. Replace worn or damaged
components as required.
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