Product Description
REMAN AIR DISC CALIPER – MAXXUS RH 12° STANDARD MOUNT WITH CARRIER
PART NUMBER(S):
Fleet Products: FP6403221050WCX (Reman) | OE: 403221050, 22-50139-000, 22-50140-000 | Automann: 158.6403220660
DESCRIPTION:
Model: Wabco MAXXUS
Engines: N/A
Vehicles: Freightliner Cascadia (2018+), Coronado (2020+); Western Star 49X, 57X
• Brake Side: Right-Hand (RH)
• Caliper Type: Reman air disc with integrated standard carrier
• Mounting Style: 12° radial mount, standard with pocket bridge
• Bolt Pattern: 8x M16 on 285.75 mm circle (confirm 6x M20 bolt count per application)
• Ports: Dual M14x1.5 ISO
• Pistons: Dual 60 mm stainless steel
• Brake Pad Compatibility: PE2061HK
• Compatible Rotor: 430 mm OD, 45 mm new
• Recommended Pin Kit: FPK30272
• Compatible Spring Brakes: FPK041960
• Carrier Included: 12° LH (FP2554)
• ABS Compatibility: WABCO 4S/4M compliant (non-integrated tone ring)
• Weight: 32.6 lbs with carrier
• System Integrity: Remanufactured OEM unit, core charge applicable
Applications:
Fits right-hand side steer or drive axles on Freightliner and Western Star platforms using 12° mount Wabco MAXXUS air disc brake systems. Intended for standard carrier configurations requiring high thermal load endurance and consistent braking torque. Not suitable for trailers, LH wheel ends, or alternate angle mounts (e.g., 0°, 15°, 20°).
CROSS-REFERENCE(S):
403221050, 22-50139-000, 22-50140-000, 6403221050, R934663, 34.40322.1050, SB-MXUS-RH-STD, RDB403221050CRX, TSE-403221050, PP-MXUS-RH, FP-403221050, UP9403221050, TP-MXUS-RH, FIP-403221050, RTC-403221050, PHD-403221050
A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Use only on trucks with MAXXUS 12° RH standard-mount brake systems
✔ Replace both RH and LH calipers together for system balance
✔ Clean and prep the caliper mounting surface; ensure it is flat and free of corrosion.
✔ Mount the caliper and torque fasteners to OEM specifications (280–310 Nm for carrier bolts; 40–45 Nm for brake fittings).
✔ Turn the adjuster CLOCKWISE until the brake pads just contact the rotor (avoid over-tightening).
✔ Then turn COUNTER-CLOCKWISE ¼ turn to set proper clearance.
✔ Confirm system air pressure is between 100–120 psi.
✔ Block and secure wheels to prevent any movement.
✔ Depress the emergency brake release button on the dash to release spring brakes.
✔ Only after the wheels are secure and spring brakes are released should you proceed with caliper adjustment.
✔ Inspect shear adapters before install – replace if cracked
✔ Use mounting hardware kit MXUS-HW12-RH
✔ Perform 20 moderate brake applications from 30 mph to bed pads before full-duty use
SOLD AS REMANUFACTURED | CORE RETURN REQUIRED
Built to OEM standards | thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, Call: 1-877-243-0442 | Email: sales@fleet-products.com
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