Maintenance Intervals And Specifications
Lift Axle System
Maintenance Chart
Procedure Interval
Check for proper brake operation Daily/Per operation
Inspect for signs of structural damage, cracks or wear in all components of
suspension parts (arms, hangers, axle seats, etc.)
Daily
Check for air leaks Daily/Per operation
Check bushings for excessive wear or movement Every 30 days
Drain condensation from tank Dry climate – Monthly
Wet climate – Daily
Torque U-bolts and all fasteners (see lift axle Torque charts) Every 6 months
Drain interior of axle-mounted air tank Same as other vehicle air tanks
Torque Specifications
DISC WHEEL TORQUE CHART
DISC WHEELS
TorqueSize Nut Mounting
lbf – ft N•m
11/16 Inch Flange 350-400 475–542
22 mm Flange: Motor Wheel - 37.5 mm Across Flats 450-500 610-678
3879634R1 219
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