5012373
Bombardier
Challenger 604, Challenger 605
Alternative Part Number604-85123-101·K600-85032-5
Overview
The 5012373 is a main wheel assembly used on Bombardier Challenger 604, Challenger 605. Manufactured by Meggitt Aircraft.
Maintenance Schedule
Penetrant Inspection → Overhaul
Per CMM: Per CMM, any wheel requiring penetrant inspection is processed as an overhaul. Owners may elect overhaul at any tire change to extend service life.
Parts Replaced at Tire Change
Every tire change replaces the tire, the main wheel-half preformed packing (O-ring), the valve cap, and the valve core. Specific part numbers and dash sizes vary by wheel and are pulled from the CMM at the time of service.
Always Replaced
Seals & O-Rings
Hardware
Replaced If Needed
Seals & O-Rings
During tire change or NDT inspection, additional parts beyond the routine four may require replacement if they fail inspection or meet the rejection criteria defined in the CMM.
Parts Replaced at Overhaul
A full overhaul includes all parts replaced at tire change (listed above), plus the following components inspected and replaced per the CMM:
Seals & O-Rings
Other Parts on the Wheel
These components are part of the wheel assembly but are not replaced during a standard tire change or overhaul. They are only replaced when inspection per the CMM identifies a rejectable condition. APSS stocks or sources these parts on request — contact us for current availability.
Bearings
Fasteners
Heat Shields
Hardware
Wheel Components
The structural components of the wheel assembly itself. These are not replaced on a standard service and come into play only when damage, corrosion, or cracks exceed the repair limits established by the CMM.
Wheel Halves
Wheel Components
Inspection Criteria
GeneralGeneral overhaul criteria — see the CMM for full specifications and numeric limits:
- Drive keys: replace if damaged, corroded, or loose.
- Heat shield: replace if cracked, burned, or mechanically damaged.
- Bolts and nuts: replace if cracked, corroded, thread-damaged, or failing the back-off torque test.
- Bearings (cones and cups): replace if spalled, discolored from heat, pitted, or showing any surface wear.
- Wheel halves: replace if cracked, out-of-round beyond CMM limits, or showing seal-groove damage.
- Preformed packings and O-rings: replace at every disassembly.
- Retaining rings and lockwire: replace whenever removed.
Service Pricing
Pricing reflects labor only. Parts, shop supplies, and freight are billed as incurred.
Tire Change Turnaround
- Standard48 hoursNo surcharge
- Expedited24 hours+$200 per wheel
- AOGSame-day (2–3 hours)+$400 per wheelRetention check waived to meet same-day release.
Overhaul Turnaround
- Standard10 business daysNo surcharge
- Expedited3–5 business days+$200 per wheel
