Wheeler 9138133-01 MB4 Brake Master Cylinder Filler Cap

Description:

The Wheeler 9138133-01 MB4 Brake Master Cylinder Filler Cap is used in towing and push back tractor hydraulic brake systems to seal and protect the brake fluid reservoir from contamination and fluid loss. Commonly installed on airport ground support equipment, towing tractors, and industrial transport vehicles where dependable brake system sealing is required for safe operation. Maintenance teams and fleet service technicians use this filler cap for replacement of damaged or missing reservoir caps during brake system maintenance and equipment repairs.

Applications:

The Wheeler 9138133-01 MB4 filler cap is commonly used in airport push back tractors, towing vehicles, industrial transport equipment, and fleet maintenance operations where hydraulic brake systems require secure reservoir sealing and contamination protection for reliable braking performance.

Technical Specifications:

• Brand: Wheeler
• Part Number: 9138133-01
• Model Reference: MB4
• Product Type: Brake Master Cylinder Filler Cap
• Application: Hydraulic brake reservoir sealing
• Compatible Equipment: Towing and push back tractors
• Function: Prevents brake fluid contamination and leakage
• Installation Type: Threaded or press-fit reservoir cap
• Usage Environment: Industrial and airport ground support equipment
• Construction: Industrial-grade cap assembly
• Designed For: Brake system maintenance and replacement
• Typical Industries: Ground support, transportation, fleet maintenance

Common Replacements:

• Grove Brake Reservoir Cap
• TLD Brake Master Cylinder Cap
• Tug Technologies Hydraulic Reservoir Cap