International — Corporate Air/IROS


International — Corporate Air/IROS

Description

International Ride-Optimized Suspension. This suspension is similar in concept to the Freightliner FAS II and Peterbilt’s New Low Air Leaf. The biggest maintenance concern is the bonded bushing in the spring eye. Commonly, it will open up and the bushing can walk out.

International Corporate Air/IROS

Fast Facts

International — Corporate Air/IROS
Type
Features
Problem Areas The biggest maintenance concern is the bonded bushing in the spring eye. Commonly, it will open up and the bushing can walk out.
ATRO Solutions

 Tech Tips and Additional Resources

With a bonded OE-style rubber bushing, the entire bushing can be forced to spin within the spring eye causing it to expand. Bonded rubber bushings attempt to combat this with an inboard flanged end encased in a ring with detents for gripping the edge of the spring’s eye.

ATRO spring pin solution (PB46-26268; UB20500-OS):

  • Rotating pin design with flanged outer sleeve limits travel
  • The revolving inner pin eliminates bushing wind-up and prevents entire bushing spinning
  • UB20500-OS, an over-sized version (+.060”), is available if the rubber bushing has opened up the spring eye slightly. The spring must still meet specifications. If not, the spring must be replaced, not rebushed.

ATRO torque rod:

  • The OE offers multiple torque rod options on this suspension. That standard rod can be replaced by ATRO’s TR55-418C1 – other OE options include non-rebushable rods, those with 2 17/32" outer diameters (rebushed by ATRO’s TS34000), or even tubular rods with jam bushings rebushed by ATRO’s TS50-22691 or PL1146.
  • Inner pin in both the standard rod (TR55-418C1) and the small eye rod (TR55-428C1) rotates for installation – enabling easy alignment with bolt holes in the straddle bushings configuration.
  • Rebushable (both the standard rod and the small eye rod.)

 Wear Items


 Key Parts

Torque Rods are availble in any length, or as two-piece rods.

ATRO Torque Rod Bushing PL1146
Torque Rod Bushing

PL1146

All Products
ATRO Torque Rod Bushing w/Retaining Rim TS50-22691
Torque Rod Bushing w/Retaining Rim

TS50-22691

All Products
ATRO Standard Torque Rod TR55-418C1
Standard Torque Rod

TR55-418C1

All Products
ATRO Small Eye Torque Rod TR55-428C1
Small Eye Torque Rod

TR55-428C1

All Products

Details

International Corporate Air/IROS suspension details
International Corporate Air/IROS

Suspension details showing hanger and spring, and ATRO parts PB46-26268 and UB20500-OS.