Multiquip 2081021TC Master Cylinder Cap Assembly

The Multiquip 2081021TC Master Cylinder Cap Assembly is a genuine OEM component designed for Multiquip trailer models including TRLR45H, TRLR45E, TRLR502XFH, TRLR502XFE, TRLRSG1600XFH, TRLRSG1600XFE, and double axle trailer configurations. As a factory-sourced part, it meets the exact specifications of the original component it replaces, ensuring proper fitment and safe braking system operation. This assembly is a direct replacement for trailers using hydraulic surge brake systems, where maintaining brake fluid integrity is critical to trailer performance. DHS Equipment stocks this genuine Multiquip part ready to ship so you can get your trailer back in service fast.

Key Features

• Brake Fluid Seal Integrity — Engineered to maintain a secure, contamination-free seal on the master cylinder reservoir, preventing moisture intrusion and brake fluid degradation.
• Genuine OEM Construction — Sourced directly from Multiquip, this cap assembly matches the original material grade and thread specification of the installed component.
• Broad Trailer Compatibility — Confirmed fitment across Multiquip trailer models TRLR45H, TRLR45E, TRLR502XFH, TRLR502XFE, TRLRSG1600XFH, TRLRSG1600XFE, and double axle variants.
• Hydraulic System Protection — A properly sealed master cylinder cap prevents air from entering the brake circuit, keeping hydraulic pressure consistent and braking response predictable.
• Safety-Critical Replacement — The master cylinder cap is a direct part of the braking system; a cracked, missing, or ill-fitting cap can compromise stopping ability and create a serious tow safety hazard.

The master cylinder cap assembly seals the brake fluid reservoir on the trailer's hydraulic surge brake system. It keeps brake fluid clean and at the correct level while blocking moisture, dirt, and air from entering the hydraulic circuit — all of which can cause brake fade, spongy pedal feel, or complete braking failure. When this cap is damaged, missing, or no longer sealing correctly, fluid can leak or become contaminated, degrading braking performance and putting the tow vehicle, trailer, and load at risk.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.