Bexar Pro 234MK master cylinder repair kit for part numbers M4921283 and M4000010.

MC KIT 234MK

Name: MC KIT 234MK
Brand: Bexar Pro Componets
SKU: 234MK
Availability: InStock

$55.00

Fitment Lookup:

Select your vehicle to verify compatibility before ordering.

SKU: 234MK Categories: Brake Master Cylinder Repair Kits, VIEW ALL PRODUCTS Brand: Bexar Pro Componets

Master Cylinder Repair Kit 234MK – Fits M4921283 / M4000010

Bexar Pro Components: Heavy-Duty Reliability for the Long Haul.

Ensure maximum hydraulic integrity with this brand new **Master Cylinder Repair Kit (234MK)** from **Bexar Pro**. This rebuild package is precision-engineered to meet the rigorous demands of **heavy-duty automotive** fleets and commercial equipment, providing a balanced solution for both industrial applications and highway vocational vehicles.

Key Specifications

Condition: NEW Repair Components
Warranty: No warranty on internal replacement parts
Application: Suitable for medium-duty trucks and heavy-duty hydraulic units
Installation Guide: Master Cylinder Replacement Guide

Verified Part Number Compatibility

These components are a confirmed fit for the following brake master cylinder part numbers:

M4921283
M4000010

Expert Installation & Field Note

Drawing from our shop experience specializing in heavy-duty brakes since 1985, the most common reason for a master cylinder failing right after a rebuild is internal leaking caused by over-extending the internal cup during bench bleeding. To ensure long-term reliability, always use short, controlled strokes. Additionally, verify that the master cylinder bore is completely free of pitting or vertical scoring before installing the 234MK components. Proper pushrod alignment is critical to prevent premature seal wear and maintain consistent pedal feel.

CRITICAL: Verify Specifications

Components may differ from the photo due to manufacturer updates. Always verify all contents against your specific unit requirements before assembly.

SKU: 234MK