The Case Construction 90354661 Brake Master Cylinder is a critical hydraulic braking component designed for Case backhoe loaders, responsible for generating and controlling hydraulic pressure within the service brake system. Manufactured by Bosch, the original equipment manufacturer, this master cylinder meets stringent OEM standards for safety, durability and performance.

With a precisely engineered 38.3 mm piston stroke, the master cylinder ensures accurate pressure modulation and consistent brake response under varying operating conditions. It is built to withstand high internal pressures, frequent braking cycles and harsh construction-site environments.

Over time, master cylinders may suffer from internal seal wear, corrosion or contamination, leading to spongy brake feel, pressure loss or fluid leakage. Replacing the master cylinder with a genuine OEM Bosch unit restores correct braking force transmission, improves pedal feel and ensures dependable stopping power.

This part is supplied as a master cylinder unit and is commonly used as the core component within complete brake repair kits.

Key Features & Benefits

• Genuine Case Construction OEM component
• Part Number: 90354661
• Manufactured by Bosch (OEM supplier)
• 38.3 mm stroke for accurate hydraulic pressure generation
• Ensures consistent, smooth and safe braking response
• High-quality internal seals for leak-free operation
• Resistant to wear, corrosion and brake fluid degradation
• Direct-fit replacement – no modification required

Applications

Used in Case Construction backhoe loaders for:

• Service brake hydraulic system
• Brake pedal to hydraulic circuit operation

(Application subject to machine model and brake system configuration.)

Replaces / Obsolete Part Numbers

This master cylinder supersedes the following Case / CNH part numbers:

• 48151473
• 85805257
• 87398198