The Meritor A1-3263M1157 or A13263M1157 is a genuine OEM air disc brake caliper assembly for the Meritor ADB1560 disc brake axle. This is the left-hand (LH) caliper, featuring an axial pad carrier, one-piece bridge design, and a single piston. The caliper mounts via a pin slide arrangement with two radial bracket mounting holes sized at 1 in. Pad length is 11.65 in., and the FMSI designation is 268. The assembly includes the power shaft, piston, and related internal parts; it uses standard grease. Compatible disc pad kits include KIT15625PM and KIT15627PM. Call us to confirm proper fit for your specific brake assembly and axle configuration.

• Position: Left-Hand (LH)
• Brake Model: ADB1560
• Pad Carrier: Axial
• Bridge Style: One-Piece
• Number of Pistons: 1
• Mount Type: Pin Slide
• Chamber Mount: Radial Bracket
• Mounting Holes: 2
• Mounting Hole Size: 1 in.
• Pad Length: 11.65 in.
• FMSI: 268
• Application: Emergency/Multiple
• Related Disc Pad Numbers: KIT15625PM; KIT15627PM
• VMRS Code: 013-013-001
• Includes: Power shaft, piston, and related parts
• Lubricant: Standard grease

Meritor part number A1-3263M1157 or A13263M1157 is listed in Meritor Air Disc Brake Catalog PB1461. Cross-reference numbers for this caliper include: 1111302, 597371C91, 8235A13263M1157, 9628A13263M1157, A13263M1157RI, ATIA13263M1157, D1560MA13263L, HRA13263M1157, MERA13263M1157, ROA13263M1157, TDAA13263M1157, and TWDA13263M1157. These interchange numbers are provided for reference only; confirm part fitment with your axle model and serial number before ordering.