Multiquip 4H1055100 Actuator Model 20 Surg-O-Matic

The Multiquip 4H1055100 Actuator Model 20 Surg-O-Matic is a genuine OEM component designed for the TRLR-300XF water trailer. As an authorized Multiquip part, 4H1055100 is built to the same specification as the original unit, ensuring a direct-fit installation with no guesswork. This is the correct OEM replacement for TRLR-300XF operators who need to restore surge brake performance to full working order. DHS Equipment stocks this part to keep your water trailer running safely and efficiently on the job.

Key Features

• Genuine OEM Surge Actuator — Manufactured to the exact same spec as the original Surg-O-Matic unit, delivering consistent braking force actuation without compromise.
• Direct-Fit for TRLR-300XF — Engineered specifically for the TRLR-300XF water trailer, this actuator mounts to the existing coupler assembly without modification.
• Hydraulic Surge Brake Activation — Converts trailer surge force into hydraulic braking pressure, maintaining smooth, proportional braking that matches the tow vehicle's deceleration.
• Safety-Critical Brake System Component — A worn or failed surge actuator can result in delayed or unresponsive trailer braking; replacing with a genuine OEM unit restores proper brake engagement and towing safety.
• Verified Multiquip OEM Sourcing — Sold by DHS Equipment as an authorized Multiquip parts distributor, so you receive an authentic 4H1055100 — not a substitute or approximation.

The Surg-O-Matic surge actuator is the heart of the TRLR-300XF's hydraulic surge brake system. When the tow vehicle decelerates, the actuator detects the forward push of the trailer's tongue and converts that mechanical force into hydraulic pressure, which is then sent to the trailer's wheel brakes. If the actuator seizes, leaks, or loses its ability to respond accurately, braking becomes unpredictable or fails altogether — making timely replacement essential for safe trailer operation.

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.