Dexter PH621-5 8 Ton Hydraulic Scissor Power Hoist Kit for 16’–20’ Dump Beds

Dexter PH621-5 8 Ton Hydraulic Scissor Power Hoist Kit for 16’–20’ Dump Beds

The Dexter PH621-5 is a heavy-duty 8 ton scissor hoist engineered for 16’–20’ dump trailer beds. Built for demanding dump trailer applications, the PH621-5 delivers stable lifting geometry, long-stroke dumping performance, and dependable hydraulic operation for contractors, trailer builders, farms, and commercial hauling operations.

Rated for 16,000 lbs when properly applied, the PH621-5 is available in multiple configurations ranging from a hoist-only setup to complete dump trailer lifting systems with integrated Dexter Power Jack hydraulic trailer jack upgrades.

Compatible with dump trailers, truck dump beds, gooseneck trailers, and custom hydraulic dump body builds.

Free Shipping in the Lower 48 states.

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Why Buyers Choose the PH621-5

• Designed for many 16’–20′ dump trailer applications
• 8 ton (16,000 lb) lifting capacity for heavy-duty hauling applications
• Long-stroke scissor geometry for smooth dump bed lifting performance
• Excellent fit for larger dump trailer builds and longer dump bodies
• 5″ hydraulic cylinder configuration for dependable lifting power
• Genuine Dexter Power Hoist components with 36-month warranty
• Optional Dexter Power Jack hydraulic trailer jack upgrades
• Free shipping in the lower 48 states

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PH621-5 Performance & Fitment Specifications

• Capacity: 8 Tons (16,000 lbs) when properly applied
• Recommended Dump Bed Length: 16’–20’ dump beds
• Hoist Type: Scissor Power Hoist
• Hydraulic Cylinder: 5″ cylinder configuration
• Hydraulic Power Unit: KTI 12V DC hydraulic pump on applicable kit levels
• Controls: 15’ wired remote with power-up, power-down, and gravity-down operation on applicable kit levels
• Finish: Corrosion-resistant powder coat
• Warranty: 36-month standard hoist warranty

Important: Hoist performance depends on bed length, trailer geometry, load placement, mounting position, dump angle, and hydraulic system configuration.

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Hoist Capacity vs. Trailer GVWR — What’s the Difference?

A hoist capacity rating is not the same as your trailer’s GVWR or payload rating. Actual lifting performance depends on trailer design, mounting geometry, load distribution, dump angle, and rear overhang.

Always review the official Dexter Power Hoist capacity charts before selecting a hoist for your application.

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Choose Your PH621-5 Kit Configuration

The PH621-5 is available in four configurations so you can choose the dump trailer lifting system that best matches your trailer build and operational requirements.

← Swipe left/right to compare all kit options →

Hoist Only: Includes the PH621-5 hoist assembly and mounting brackets for builders supplying their own hydraulic components.

Standard Kit: Complete dump hoist system with KTI pump, hoses, fittings, wiring, remote, hinges, and safety components.

Pro Kit: Standard Kit plus a single Dexter Power Jack hydraulic trailer jack system.

Pro Max Kit: Standard Kit plus dual Dexter Power Jack hydraulic trailer jack systems with a hydraulic flow divider for synchronized operation.

Most buyers choose the Standard Kit for a complete dump trailer setup, while the Pro and Pro Max systems are ideal for trailers requiring powered tongue lifting convenience and integrated hydraulic jack functionality.

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Why the Pro & Pro Max Systems Use a Shared Hydraulic Pump

No second pump. No extra wiring.

The Pro and Pro Max kits share one KTI power unit between the dump hoist and hydraulic jacks using a simple selector valve. Fewer components to wire, fewer parts to maintain, and a cleaner setup on the trailer tongue.

The Pro configuration includes a single Dexter Power Jack hydraulic trailer jack system, while the Pro Max configuration includes dual Dexter Power Jacks with a hydraulic flow divider for synchronized lifting performance.

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KTI Hydraulic Pump System

Applicable PH621-5 configurations include a genuine KTI 12V DC hydraulic power unit engineered specifically for dump trailer lifting systems.

The KTI power unit supports power-up, power-down, and gravity-down operation using the included 15’ wired remote control for smooth dump bed operation during loading and unloading cycles.

For trailer builders and repair shops replacing older systems, the PH621-5 provides a matched setup with compatible hoses, fittings, controls, wiring, and safety components included on applicable kit configurations.

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⚡ Protect Your Investment: Why Proper Battery Charging Matters

Dump trailer lifting systems place heavy electrical demand on trailer batteries during raising and lowering cycles. Low voltage conditions can lead to slow lifting speeds, shortened battery life, damaged solenoids, and premature hydraulic motor wear — and it’s one of the most common causes of hydraulic system problems we see in the field.

Johnson Trailer Parts carries a full line of trailer battery charging solutions to help keep your hydraulic system running reliably:

• Road Chargers — Charge your trailer battery directly from the tow vehicle while driving
• SolarPulse® Battery Maintainers — Keep batteries topped off on parked trailers
• Smart Battery Chargers — Great for charging between jobs or during storage
• Battery Optimizer Systems — Combine multiple charging methods for maximum battery protection

View Battery Charging Products

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Additional Resources & Installation Guides

• ⇓ Download PH621-5 Installation Manual
• ⇓ Download Power Hoist Capacity & Load Charts
• ⇓ Download Power Hoist Dimensions
• ⇓ Download KTI Hydraulic Pump Installation Manual
• Read Scissor Hoist Selection Guide
• View Documents Page
• Watch Johnson Trailer Parts on YouTube

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Frequently Asked Questions

What size dump bed is the PH621-5 designed for?

The PH621-5 is designed for 16’–20’ dump beds when properly matched to trailer geometry, load placement, mounting position, rear overhang, and dump angle requirements.

Does the PH621-5 include a hydraulic pump?

Yes. Applicable PH621-5 configurations include a genuine KTI 12V DC hydraulic power unit with wired remote control. The Hoist Only version does not include the hydraulic pump, hoses, controls, or electrical components.

What is the difference between Hoist Only, Standard, Pro, and Pro Max?

• Hoist Only: Hoist assembly and mounting brackets only
• Standard: Complete dump hoist system with hydraulic power unit, controls, wiring, hoses, and safety hardware
• Pro: Standard Kit plus a genuine Dexter Power Jack hydraulic trailer jack system
• Pro Max: Standard Kit plus dual Dexter Power Jack hydraulic trailer jack systems with synchronized hydraulic operation

What is the difference between the PH621-5 and PH621-6?

The PH621-5 uses a 5″ hydraulic cylinder and is rated for 8 ton (16,000 lb) lifting capacity when properly applied. The PH621-6 uses a larger 6″ cylinder for increased lifting force and higher-capacity dump trailer applications.

Is free shipping included?

Yes. Free shipping is included within the lower 48 states.

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Watch a Dexter Scissor Hoist Dump Trailer Build

This video shows our team building a dump trailer with the Dexter PH520. The PH621-5 shares the same scissor hoist design and hydraulic system — it’s a great look at how the overall setup goes together.

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Need Help Choosing the Right PH621-5 Hoist Kit?

Our team can help verify dump bed size, hoist fitment, hydraulic compatibility, battery charging recommendations, and Dexter Power Jack upgrade options before you order.

Call or Text Johnson Trailer Parts at
(602) 292-9690