Sourcing the HCHJ-12KD 12-ton double-acting hydraulic trailer jack for gooseneck trailers? Review OEM specs: 2" bore, 1" rod, 20" stroke, 3,000 psi, dual-action power.
Nominal Working Bore Diameter:
2.0 inches (50.8 mm)Induction-Hardened Rod Diameter:
1.0 inch (25.4 mm)Full Usable Stroke:
20.0 inches (508.0 mm)Retracted Overall Housing Length:
30.0 inches (762.0 mm)Static & Dynamic Rated Load:
12.0 Metric Tons / 24,000 lbsAnyone who has hand-cranked a two-speed mechanical jack under a 24,000 lb loaded gooseneck trailer in freezing rain knows the physical toll it takes on drivers. Manual landing gear is slow, dangerous during sudden tongue drops, and prone to internal bevel gear stripping. The HCHJ-12KD 12-Ton Double-Acting Hydraulic Trailer Jack for Gooseneck Trailers replaces manual sweat with smooth, push-button hydraulic power, lifting or lowering a full 12-ton tongue load in less than 15 seconds.
While basic single-acting jacks rely on internal return springs or trailer tongue weight to push the cylinder back up, spring-return designs constantly fail when footpads sink into sticky clay, asphalt sealcoat, or frozen gravel. The HCHJ-12KD 12-Ton Double-Acting Hydraulic Trailer Jack for Gooseneck Trailers features dedicated dual-acting hydraulic ports, using direct system pressure to power the cylinder both down and up—ripping sunken footplates free from muddy jobsite ground with ease.
On commercial lowboys, equipment haulers, and heavy livestock trailers, single-acting hydraulic jacks present severe operational bottlenecks:
No Pulling Power in Mud: If your trailer settles into soft mud while loaded with an excavator, a single-acting spring cannot overcome suction and mud weight. The HCHJ-12KD provides hydraulic retraction force on the annular rod side, pulling the footpad up cleanly.
Positive Leveling Adjustment: When coupling to a high fifth-wheel hitch or truck receiver on uneven terrain, a double-acting jack allows micro-precise bidirectional height adjustments without needing the trailer weight to compress the cylinder.
Elimination of Broken Internal Springs: Single-acting return springs corrode, fatigue, and snap over time inside sealed tubes. The HCHJ-12KD 12-Ton Double-Acting Hydraulic Trailer Jack for Gooseneck Trailers relies on pure hydraulic fluid power, eliminating internal mechanical springs entirely.
A critical concern for trailer fleets is load creep—ensuring the jack does not drop even 1/8 inch when parked overnight with heavy machinery on board.
The HCHJ-12KD utilizes dual industry-standard SAE #6 O-Ring Boss ports. For maximum safety, HCIC integrates or provisions a dual pilot-operated check valve (P-O check lock pack) directly onto the cylinder barrel. When hydraulic directional control valves return to center, the pilot check valve locks trapped fluid inside the bore, preventing pressure bleeding through spool clearances and ensuring rock-solid static holding stability.
For wide commercial gooseneck trailers or tandem-jack horse haulers requiring synchronized dual legs, installing two HCHJ-12KD units with a matched flow divider ensures both sides extend at identical speeds regardless of unequal side loading.
Troubleshooting & Maintenance in Cold Weather
Fleet mechanics servicing the HCHJ-12KD 12-Ton Double-Acting Hydraulic Trailer Jack for Gooseneck Trailers should follow these winter maintenance steps:
Specifications published here reflect the official HCIC 2026 Product Catalog (Page 16, Hydraulic Jack for Dump Trailer). Trailer builders must calculate total gross tongue weight and design adequate frame gusseting to support concentrated jack load points.
Ready to eliminate manual landing gear headaches across your trailer production line?
Contact HCIC with your trailer tongue dimensions, single or dual jack plumbing requirements, and annual volume. We deliver complete 3D STEP files within 24 hours, custom drop-leg pin configurations, and direct container pricing for trailer OEMs worldwide.
