Primary Mover PF-520 Replacement Hydraulic Cylinder – Dump Trailer Scissor Hoist
Replacement hydraulic cylinder for the Primary Mover PF-520 dump trailer scissor hoist.
This heavy-duty hydraulic cylinder is designed as a replacement for the cylinder used in the Primary Mover PF-520 dump bed hoist system. It features a 5.5-inch diameter, extended 20-inch stroke, and heavy-wall construction engineered for longer dump beds and demanding dump trailer applications.
IMPORTANT FITMENT NOTICE: This replacement cylinder is designed specifically for the Primary Mover PF-520 hoist. Primary Mover does not recommend installing this cylinder on another manufacturer’s dump hoist or scissor hoist. Cylinder stroke, closed length, mounting locations, pivot points, dump angle, frame geometry, and other engineering dimensions are critical to proper hoist operation. A cylinder that appears similar or physically fits is not necessarily compatible or safe for another manufacturer’s system.
The PF-520 has been produced in more than one cylinder configuration. Depending on your PF-520 hoist, you may require Configuration A or Configuration B. These configurations are application-specific and should not be selected based on appearance alone.
Primary Mover will contact you after purchase to confirm that you have a Primary Mover PF-520 hoist and determine the correct cylinder configuration before your order is released.
Key Features
Designed for the Primary Mover PF-520
This cylinder is intended specifically as a replacement component for the Primary Mover PF-520 hydraulic dump trailer scissor hoist.
Configuration-Specific Replacement
Primary Mover PF-520 hoists may use one of two cylinder configurations. Our team will verify your existing hoist and determine whether Configuration A or Configuration B is required before shipment.
5.5-Inch Diameter & Extended 20-Inch Stroke
The PF-520 cylinder combines a 5.5-inch diameter with a 20-inch stroke. The longer stroke is matched to the PF-520 hoist geometry and helps make this system well suited for longer dump bodies where additional travel and dump angle are required.
Heavy-Duty 7.5 mm / 0.295″ Cylinder Wall
Primary Mover uses approximately 7.5 mm (0.295″) wall thickness in this cylinder. A thicker cylinder tube helps resist expansion under hydraulic pressure, supporting cylinder rigidity, seal life, and long-term durability in demanding dump trailer applications.
Designed for High Hydraulic Pressure
Heavy-wall construction is designed to withstand hydraulic system pressures up to approximately 3,200 PSI without excessive cylinder tube deformation under normal intended operation.
Replacement for Worn or Damaged PF-520 Cylinders
Ideal for servicing an existing Primary Mover PF-520 scissor hoist when the hoist structure remains serviceable but the hydraulic cylinder requires replacement.
Specifications
- Application: Primary Mover PF-520 Scissor Hoist
- Component Type: Replacement Hydraulic Cylinder
- Cylinder Diameter: 5.5″
- Stroke: 20″
- Cylinder Wall Thickness: Approximately 7.5 mm / 0.295″
- Maximum Hydraulic Pressure: Approximately 3,200 PSI
- Typical Hoist Lift Range: Approximately 10 to 12.9 tons depending on dump angle, mounting geometry, load position, hydraulic pressure, and overall trailer setup
- Available Fitment: Configuration A or Configuration B, verified by Primary Mover before shipment
- Compatibility: Primary Mover PF-520 hoist systems only
Important: Dump hoist lifting capacity is not determined by the hydraulic cylinder alone. Actual lifting performance changes throughout the dump cycle and depends heavily on hoist geometry, dump angle, load position, hydraulic pressure, trailer construction, and installation. Refer to the applicable Primary Mover lift data for detailed performance information.
Replacement Cylinder Only
This listing includes the replacement hydraulic cylinder only. It is not a complete dump trailer conversion kit and does not include the PF-520 scissor hoist frame, hydraulic power unit, hoses, fittings, hinges, or other installation components.
If you are building a new dump bed or converting an existing trailer, select the complete Primary Mover PF-520 scissor hoist kit engineered for that application.
Frequently Asked Questions
No. The PF-520 replacement cylinder is specifically designed for the Primary Mover PF-520 scissor hoist. It should not be treated as a universal dump trailer cylinder based only on bore size, stroke, mounting style, or physical dimensions.
Primary Mover PF-520 hoists have been produced with more than one cylinder configuration. Both are legitimate PF-520 applications, but the correct replacement cylinder depends on the geometry and mounting arrangement of your specific hoist.
We use the terms Configuration A and Configuration B simply to distinguish fitment. One should not be considered better, newer, or more desirable than the other.
You do not need to determine the configuration yourself. Primary Mover will contact you after your order is placed to verify your PF-520 hoist and determine the correct cylinder before the order is released.
We may request photos, measurements, identifying features, or other information from your existing Primary Mover hoist as part of the verification process.
Primary Mover does not recommend installing this cylinder on another manufacturer’s hoist. Hydraulic dump hoists depend on specific cylinder mounting points, closed and extended lengths, pivot locations, frame geometry, dump angle, and structural design.
Installing a cylinder that was not engineered for the original hoist can significantly change the forces applied to the hoist and trailer structure. Primary Mover does not approve or certify compatibility of this cylinder with another manufacturer’s system.
Scissor hoists create changing mechanical leverage as the dump body moves through its lifting range. Small differences in cylinder mounting position, stroke, closed length, pivot location, or hoist geometry can substantially change cylinder pressure, structural loading, lifting force, and final dump angle.
For this reason, matching cylinder diameter and stroke alone is not enough to establish compatibility with another dump hoist.
Absolutely—cylinder wall thickness matters. A hydraulic cylinder tube is repeatedly subjected to internal pressure every time the dump body is raised. Thinner-wall cylinder tubes can be more prone to expanding or flexing under repeated high-pressure operation.
Over time, excessive tube expansion can affect the relationship between the cylinder bore, piston, and seals, increasing seal wear and potentially contributing to premature seal failure.
The Primary Mover PF-520 cylinder uses an approximately 7.5 mm (0.295″) wall thickness to provide greater resistance to this expansion and support longer-term durability in demanding dump trailer applications.
Watch our Hydraulic Cylinder Wall Thickness Comparison Video
The PF-520 uses a longer 20-inch cylinder stroke as part of the complete hoist geometry. This additional travel makes the PF-520 particularly well suited for longer dump beds and applications where greater hoist travel is needed to achieve the intended dump angle.
The longer stroke should not be viewed as a stand-alone upgrade for another hoist. Cylinder stroke must be matched to the geometry and structural design of the complete scissor hoist system.
Yes. Because PF-520 hoists can use more than one cylinder configuration, Primary Mover will contact you after purchase to confirm that you have a Primary Mover PF-520 and determine the correct replacement cylinder before shipment.
The PF-520 system typically operates in approximately the 10 to 12.9 ton lifting range depending on dump angle, load position, hydraulic pressure, trailer setup, and hoist geometry.
Hydraulic dump hoist lifting capacity changes throughout the dump cycle. Refer to the Primary Mover lift data chart for more detailed performance information.
This cylinder is sold as a replacement component for the Primary Mover PF-520 hoist and is not intended as a stand-alone component for designing a custom dump hoist.
If you are building or converting a dump trailer, Primary Mover recommends using a complete engineered hoist kit rather than designing a lifting system around an individual replacement cylinder.
Not necessarily. If your existing Primary Mover PF-520 hoist frame, pivot points, mounting structure, and related components remain in serviceable condition, the correct replacement cylinder may allow you to repair the hoist without replacing the complete assembly.
No. This listing is for the replacement hydraulic cylinder only. The complete PF-520 dump hoist kit includes the engineered scissor hoist structure and additional components required for a complete dump trailer installation.
Why Choose Primary Mover Replacement Components?
- Verified Fitment: Primary Mover confirms the correct PF-520 cylinder configuration before shipment.
- Extended 20-Inch Stroke: Matched specifically to the PF-520 geometry for longer dump bed applications.
- Heavy-Wall Cylinder Construction: Approximately 7.5 mm / 0.295″ wall thickness designed to better resist tube expansion under hydraulic pressure.
- Application Support: Our team helps identify the correct replacement component for your specific Primary Mover system.
- Hydraulic Expertise: Purpose-built hydraulic components backed by real-world dump trailer experience.
Restore your Primary Mover PF-520 dump trailer scissor hoist with the correct replacement hydraulic cylinder for your specific hoist configuration.
