20T 4in Hollow Hydraulic Cylinder Jack - Compact 20 US Ton

In this review of the 20T 4in Hollow Hydraulic Cylinder Jack the bottom line is clear: this is a compact, high-capacity ram for technicians who need heavy lifting in tight spaces. It is best for riggers, fabricators, welders and automotive body shops that require a small footprint tool with a 20 US ton capacity and a 4in stroke. The single acting, pressure-extend and spring-return design paired with a hard black oxide plated ram make it a practical lifting solution where reach and durability matter, though users should be aware of mixed reports on sealing.

Key Features

• 20 US Ton Capacity: Provides substantial lifting force for heavy equipment tasks like bushing replacement and frame alignment.
• 4in Stroke Hollow Ram: The hollow center allows for working over a protruding rod or bolt, making it useful in constrained assemblies.
• 3/8in NPT CR-400 Coupler: The quick hydraulic coupler with dust cap speeds hookup and keeps contaminants out of the hydraulic circuit.
• 10,000 PSI Maximum Pressure: High operating pressure ensures the ram delivers reliable extension force for demanding jobs.
• Durable Materials: Hard black oxide plated high carbon steel ram and heat-treated steel shell improve wear resistance and service life.
• Compact Design: Small overall size is intended for narrow space positioning where larger jacks cannot fit.

Who It's For

This cylinder is aimed at professionals who need a compact yet powerful lifting tool: riggers working under structures, fabricators pressing parts, welders doing alignment, and automotive technicians handling body and frame work. The hollow ram and 4in stroke are especially helpful when a through rod or bolt must remain in place.

It is less suitable for casual DIYers who rarely use hydraulic tools or for applications that demand a two-stage or multi-purpose cylinder with integrated stands. Also consider units with proven leak history if absolute zero leakage is required for critical hydraulic systems.

Pros & Cons

Pros

• High 20 US ton capacity in a compact package makes tough lifting tasks easier in tight spaces.
• Hollow 4in stroke design increases versatility when working over existing rods or bolts.
• Durable construction with plated steel ram and heat-treated shell improves longevity in shop environments.
• Quick-connect CR-400 coupler with dust cap streamlines hookup and maintenance.

Cons

• Some users report mixed sealing performance, including occasional leakage on first use, so inspect seals before critical jobs.
• Single acting means a separate pump or pressure source is required to extend the ram; no powered retract option beyond spring return.

Specifications

Capacity	20 US Ton
Stroke	4 in (100 mm)
Connector Type	3/8 in NPT CR-400 quick hydraulic coupler with dust cap
Max Pressure	10,000 PSI
Action	Single acting - pressure extend, spring return
Ram Finish	Hard black oxide plated high carbon steel
Shell	Proprietary heat-treated steel shell

Our Verdict

The 20T 4in Hollow Hydraulic Cylinder Jack is a strong, compact choice for professionals who need high lifting capacity in confined spaces; its durable materials and hollow ram add real-world versatility. Buyers who prioritize absolute leak-free performance should inspect seals on receipt, but for most rigging and shop tasks this cylinder delivers solid value and capability.

Frequently Asked Questions

Is this cylinder suitable for automotive bushing replacement?
The 20 US ton capacity and compact hollow ram make it well suited for heavy bushing and suspension work where space is limited.

Does it include a coupler and dust cap?
Yes, it uses a 3/8 in NPT CR-400 quick hydraulic coupler and ships with a dust cap to protect the connection.

Will the ram retract without a pump?
It is single acting with spring return, so it retracts via the internal spring but requires hydraulic pressure from a pump to extend.