Inspecting the Suspension, Neway

sb mm 32.12.001
  1. Chock the front or the rear tires. Working at the front of the vehicle or at the rear of the vehicle, raise the vehicle so that the tires just clear the ground and the suspension is fully extended. Place safety stands under the vehicle frame.

    Fig. 1, Holland® Neway® ADL 120/123 Suspension

  2. Squeeze all air springs to check for complete deflation. See Fig. and Fig.. If any air springs remain partially or fully inflated, see General Information, Freightliner Front Suspension of the Shuttle Bus Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer. Inspect the air springs for cracks, tears, or other damage.

    Fig. 2, Holland® AS-120 Suspension

  3. Inspect each air spring for wear at the pedestal connection. Inspect for leaks at the upper and lower pedestal connections using a soapy solution. Replace any worn air springs; for instructions, see General Information, Freightliner Front Suspension of the Shuttle Bus Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer.
  4. Inspect the bolts and nuts at the pivot connections, the transverse beam connections, and the axle connections to ensure they are tightened to the correct torque specification.
  5. Check all of the other suspension components for any sign of damage, looseness, wear, or cracks. Replace worn or damaged parts. See General Information, Freightliner Front Suspension of the Shuttle Bus Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer.
  6. Inspect for cracked welds. If cracks are found, contact Neway immediately for further instructions.
  7. Inspect the torque rod and track bar pivot bushings for excessive wear. Replace worn or damaged bushings. See General Information, Freightliner Front Suspension of the Shuttle Bus Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer.
  8. 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 by following the procedures in General Information, Freightliner Front Suspension of the Shuttle Bus Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer.
  9. Check for leaks on the height control valves by applying a soapy solution, then watching for bubbles at all air connections and fittings.
  10. 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. For instructions, see General Information, Freightliner Front Suspension of the Shuttle Bus Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer.
  11. Remove the safety stands and lower the vehicle to the ground. Run the engine until air pressure of at least 100 psi (689 kPa) is maintained throughout the system.

    12. Important: Repeat this check at both ends of the vehicle.

  12. Check that all air springs are inflated. If the air springs do not inflate, see General Information, Freightliner Front Suspension of the Shuttle Bus Chassis Workshop Manual for possible causes and corrections, or take the vehicle to an authorized Freightliner dealer.
Note:
Parent topic: Suspension
Document Number: 0000120418
Manual Publication Date: 2025-01-08
Topic Publication Date: 2025-01-08