Dexter PH310 3 Ton Hydraulic Scissor Power Hoist Kit for 8’–10’ Dump Beds

3-Ton Hydraulic Lifting Power for 8’–10′ Dump Beds

Engineered for 8’–10′ dump beds, the genuine Dexter PH310 Power Hoist provides up to 3 tons (6,000 lb) of hydraulic hoist capacity when properly applied. Its compact scissor design provides stable lifting geometry and dependable operation for compact dump trailer builds, replacement systems, utility dump trailers, truck dump bodies, and custom applications.

Choose the standalone hoist assembly or a complete hydraulic package with a genuine KTI power unit and optional Dexter Power Jack.

Choose Your PH310 Kit Configuration

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Hoist Only: PH310 hoist assembly and mounting brackets for builders who already have a compatible hydraulic system.

Standard: Complete dump hoist system with matched KTI hydraulics, controls, wiring, hinges, and safety components.

Pro: Standard Kit plus the Single Dexter Power Jack Add-On Kit.

PH310 Specifications

Understanding Hoist Capacity vs. Trailer GVWR

The PH310 capacity chart below shows how dump-body length, rear overhang, and dump angle affect published hoist capacity. Actual lifting performance also depends on bed weight, hoist mounting position, hinge geometry, hydraulic pressure, and load placement. A load concentrated toward the front of the dump bed requires greater lifting force and may reduce lifting performance compared with an evenly distributed load. The published chart assumes a water-level, non-diminishing load.

PH310 Capacity Reference Table

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PH310 published hoist capacity reference — capacity shown in tons

A: Body Length	B: Rear Overhang	45° Dump Angle	50° Dump Angle
8 ft	12 in	3.7 tons	3.3 tons
8 ft	18 in	4.4 tons	4.0 tons
8 ft	24 in	5.5 tons	4.9 tons
9 ft	12 in	3.2 tons	2.8 tons
9 ft	18 in	3.7 tons	3.3 tons
9 ft	24 in	4.4 tons	4.0 tons
10 ft	12 in	2.8 tons	2.5 tons
10 ft	18 in	3.2 tons	2.8 tons
10 ft	24 in	3.7 tons	3.3 tons

Published Capacity Assumptions:

1. Water-level, non-diminishing load.
2. Vertical height between the rear hinge pivot and floor is at least 3 inches.
3. Hydraulic relief pressure is set at 3,200 PSI.

Because applications vary, these capacities are provided as a general guide only.

Hoist Capacity Does Not Determine Trailer GVWR: Use the PH310 chart above to evaluate hoist performance for your bed length, rear overhang, and desired dump angle. The chart does not establish or increase the trailer’s GVWR or allowable payload. Those ratings depend on the complete trailer design and all rated components, including the frame, axles, suspension, brakes, wheels, tires, coupler, and hitch.

Verify Fitment: Review the PH310 dimensional drawing in the product gallery or resources section before ordering to confirm mounting space and installation geometry.

If you are unsure whether the PH310 is appropriate for your build, contact Johnson Trailer Parts before ordering.

KTI Three-Button Hydraulic Pump System

The Standard and Pro configurations include a KTI 3-quart 12V DC hydraulic power unit with a 15′ wired three-button remote. The operator can raise the dump bed using power-up, lower it hydraulically using power-down, or select gravity-down operation when appropriate for the application.

Gravity-down allows the bed to lower without running the hydraulic motor, helping reduce electrical demand and conserve trailer battery power. Powered lowering provides controlled hydraulic force in the lowering direction when the application calls for it.

Dexter Power Jack Add-On System — Pro

The Pro package adds a genuine Dexter Power Jack hydraulic trailer jack powered by the kit’s KTI hydraulic pump. An inline selector valve routes hydraulic flow to either the PH310 dump hoist or the jack system, providing powered tongue lifting without the cost, weight, wiring, battery cables, and maintenance requirements of a second pump.

• Pro Package: Includes the Single Dexter Power Jack Add-On Kit with an inline selector valve for push-button tongue lifting and leveling.

Common PH310 Applications

• Compact dump trailer new builds
• Dump trailer hoist replacements
• 8′ and 10′ dump trailer beds
• Utility dump trailers
• Truck dump beds and custom dump-body conversions
• Landscaping and property-maintenance trailers
• Farm and agricultural trailers
• Compact hydraulic dump trailer upgrades

Free Freight Shipping Information

Free freight shipping is available to qualifying addresses within the lower 48 states.

Limited-access locations—including apartments, islands, farms, construction sites, and similar locations—and liftgate service may require additional charges. The delivery address must be accessible to a full-size freight truck, with personnel and equipment available to unload the shipment.

All freight deliveries require a scheduled delivery appointment. The freight carrier will contact the recipient before delivery, so please provide a current and monitored phone number with your order.

Genuine Dexter Quality & Support

Previously sold under the Premium Supply brand, the PH310 is now offered under the trusted Dexter brand as part of the Dexter Power Hoist line. The PH310 hoist carries a 36-month standard hoist warranty. Warranty coverage for pumps, controls, jacks, and other components is governed by the applicable component manufacturer’s terms.

Johnson Trailer Parts has the product knowledge to help builders and repair shops select the correct hoist configuration, verify application details, and understand the available hydraulic and Power Jack options.

Battery Maintenance Tip

PH310 Manuals, Charts & Selection Guides

• Download the PH310 Installation Manual
• Download Power Hoist Capacity & Load Charts
• Download Power Hoist Dimensions
• Download KTI Hydraulic Pump Instructions
• Compare with the 6-Ton Dexter PH416 Power Hoist
• Compare with the 8-Ton Dexter PH516 Power Hoist
• Read the Scissor Hoist Selection Guide

Frequently Asked Questions

Watch a Dexter Scissor Hoist Dump Trailer Build

This Johnson Trailer Parts build features the Dexter PH520 and provides a real-world look at the related scissor-hoist design, hydraulic-system layout, and overall dump trailer installation.

Need Help Choosing the Right PH310 Kit?