The Meritor 3218Z1404 is a U-shaped air disc brake rotor for the Meritor EX225, with 10 mounting holes on a 250 mm (9 13/16 in.) bolt circle and a 438 mm (17 1/4 in.) outside diameter. It is a genuine Meritor part from Pro Gear and Transmission.
The rotor is the friction surface the caliper pads clamp against to slow the wheel. Disc thickness is 1 3/4 in. (45 mm) with a discard thickness of 1 5/8 in. (41 mm). Cracks that open under braking, deep grooves or metal-to-metal contact mean replacement, and uneven wear often traces back to a sticking caliper. Call us to confirm proper fit.
Features
U-shaped rotor for the Meritor EX225 air disc brake
10 mounting holes on a 250 mm bolt circle, 5/8 in.-18 bolt hole size
438 mm outside diameter, 194 mm pilot diameter, 142 mm rotor depth
Disc thickness 45 mm, discard thickness 41 mm
Tone ring mount holes; casting 23-123547
Cracks that open under braking or metal-to-metal contact call for replacement
Tech Specs
- Application: Meritor EX225
- Rotor type: U-shaped
- Mounting holes: 10
- Bolt circle diameter: 9 13/16 in. (250 mm)
- Bolt hole size: 5/8 in.-18
- Outside diameter: 17 1/4 in. (438 mm)
- Pilot diameter: 7 5/8 in. (194 mm)
- Rotor depth: 5 9/16 in. (142 mm)
- Flange thickness: 1 1/8 in. (29 mm)
- Disc thickness: 1 3/4 in. (45 mm)
- Discard thickness: 1 5/8 in. (41 mm)
- Notes: Casting 23-123547; tone ring mount holes; 8.24 bolt circle 1/4 -20 UNC
