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Dexter Marine Products K99-Z85-20 Model 850 Disc Brake Actuator 8500 lb

Manufacturer

Dexter Marine Products

<h3>Dexter Marine Products: The Standard in Trailer Components Since 1960</h3><p>Few names carry as much weight in the trailer industry as <strong>Dexter Marine Products</strong>. Founded in 1960 and headquartered in Elkhart, Indiana, Dexter has grown into one of the most respected manufacturers of trailer axles, brakes, suspension systems, and related hardware in the world. With more than 3,800 employees across the United States and Canada and 18 manufacturing facilities, Dexter operates at a scale that few competitors can match — and that scale translates directly into consistent, engineering-driven quality for the end user.</p><p>What sets Dexter apart is a dedication to serving some of the most demanding towing environments imaginable. Boat trailers face a unique combination of stresses: saltwater corrosion, repeated submersion at launch ramps, heavy dynamic loads at highway speeds, and the shock of uneven pavement. Dexter engineers its marine product line specifically to meet these challenges head-on, offering components with galvanized, zinc-plated, and powder-coated finishes designed to resist the elements season after season.</p><p>Across the broader trailer market — covering commercial, RV, agricultural, utility, and marine applications — OEM manufacturers have installed more than 45 million Dexter axles, a figure that speaks to the brand's reliability at scale. Their in-house laboratory conducts rigorous stress, fatigue, and metallurgical evaluations, while computer-equipped test vehicles analyze real-world product performance before anything reaches the market.</p><h3>A Complete Brake System Under One Roof</h3><p>One of Dexter's greatest strengths is the breadth of its brake ecosystem. Rather than offering just one piece of the puzzle, Dexter supplies the entire braking chain. At the heart of many hydraulic systems are Dexter's <a href="/12891-dexter-marine-products-brake-actuators-200201">brake actuators</a> — including both surge-style and electric-over-hydraulic designs — that translate towing vehicle deceleration into precise hydraulic pressure at the trailer wheels. These actuators work in tandem with Dexter's extensive lineup of <a href="/12891-dexter-marine-products-brakes-brake-parts-200202">brakes and brake parts</a>, which includes electric drum, hydraulic drum, and hydraulic disc configurations to suit virtually any trailer application.</p><p>For trailers that demand the highest stopping performance, Dexter's <a href="/12891-dexter-marine-products-disc-brake-caliper-1704">disc brake calipers</a> feature a fixed, self-adjusting design with easily replaceable pads. The disc brake line spans axle ratings from 3,500 lbs. to 12,000 lbs. and is covered by a 5-year limited warranty, making it a long-term investment in towing safety.</p><h3>Hubs, Bearings, and the Hardware That Keeps Wheels Turning</h3><p>Beyond braking, Dexter supplies the rotational hardware that keeps trailer wheels in motion reliably. Their <a href="/12891-dexter-marine-products-hubs-200550">trailer hubs</a> are precision-engineered with corrosion-resistant construction, and many feature Dexter's signature E-Z Lube fittings for straightforward routine maintenance. Complementing the hub lineup, Dexter's wheel bearing and hub assemblies deliver a complete, ready-to-install solution that simplifies both initial setup and replacement down the road.</p><p>Whether you're outfitting a new boat trailer, restoring an aging RV axle, or sourcing OEM replacement parts for a commercial fleet, Dexter Marine Products offers an integrated system where every component is designed and tested to work together. That systems-level thinking — from actuator to caliper to hub — is the core of why trailer builders and enthusiasts alike have trusted the Dexter name for over six decades.</p>

Part Number

K99-Z85-20
09/13/2036 6:00 AM
Sale Price

$421.71

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Usually delivered within 2 days

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Product Details

The Dexter Model 850 disc brake surge actuator is designed for boat and utility trailers requiring reliable hydraulic braking performance. This bolt-on actuator features the innovative Drop-N-Go latch mechanism that automatically locks when lowered onto the hitch ball, providing secure coupling and convenient operation.

Key Features:

  • Rated capacity: 8,500 lbs gross trailer weight (GTW)
  • Maximum tongue weight: 850 lbs
  • Drop-N-Go quick lock mechanism automatically secures to hitch ball
  • Fits standard 2-inch trailer hitch balls
  • Bolt-on design mounts to 3-inch wide trailer tongues
  • Disc brake compatible hydraulic master cylinder
  • Built-in dampening shock absorber for smooth braking

This surge brake actuator works automatically by sensing the trailer's forward push against the tow vehicle during deceleration, telescoping together to apply hydraulic pressure to the disc brakes. The system synchronizes trailer braking with the tow vehicle's brakes without requiring electrical connections. Replaces Tie Down Engineering part #70523 and previous Dexter part K99-285-20.

Products specifications

Capacity

8,500 lbs.

Model

800-Disc Brake Ready

Had what I needed in stock and shipped it out quickly. Would have been nice to have the option to ship on my account and get it sooner. Overall good experience and I will come back if I need similar items.

10/10 service.

Super fast and efficient! Thank you!

Good product, arrived in 2 days. I highly recommend.

Yep perfect

I needed an expensive part for my outboard motor's steering system, several of the internet sellers should out of stock/back ordered. Boatplicity showed the item in stock. I went on chat and was told the item was available. I paid the extra $9.99 for 2 day delivery. I ordered the $2000.00 item Wed. May 15 2024 at 1:00 pm. Fed Ex rang my door bell the next day at 11:30 am. I received that item less than 24 hours from the time I placed my order. That is as good as it gets !

Good job!

Quick easy and best prices around!

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