PSC Full Hydraulic Steering Kit for 2.5-Ton Rockwell Axles - GM P-Pump

Steering System Configuration:

• 200cc orbital valve paired with a 3.0" bore double-ended cylinder.
• Approximately 3.9 steering wheel turns lock-to-lock based on the supplied system configuration.
• PSC SP1405 high-flow pump designed for compatible GM P-series applications.
• Complete hose and fitting package for hydraulic steering plumbing.
• Non-Hydroboost pump configuration.

Note: Actual steering travel and steering wheel turns depend on cylinder stroke utilization, steering stop adjustment, and final system configuration.

Designed for custom off-road vehicles equipped with 2.5-ton Rockwell steering axles and compatible GM P-series power steering pump mounting arrangements.

Primary Applications:

• 2.5-Ton Rockwell Front Steering Axles
• Rockwell-Equipped Rock Crawlers
• Rock Bouncers & Competition Buggies
• Heavy-Duty Tube-Chassis Off-Road Vehicles
• Custom Full Hydraulic Steering Conversions
• GM V8-Powered Off-Road Builds with Compatible P-Series Pump Brackets

Engine & Pump Compatibility:

• GM V8 engine applications from 1980 and newer using compatible factory Saginaw P-series pump brackets.
• PSC SP1405 GM High Flow P-Series pump.
• Direct replacement for compatible factory P-series Saginaw steering pump configurations.
• Designed for installations without Hydroboost braking systems.
• Verify pump mounting brackets, pulley alignment, belt routing, and hydraulic connections before ordering.
• Custom brackets or additional components may be required for modified or aftermarket engine accessory drives.

Axle & Steering Fitment Notes:

• Designed specifically around the steering requirements of 2.5-ton Rockwell axles.
• Uses a 3.0" bore x 9.0" stroke double-ended hydraulic steering cylinder.
• Includes four cylinder mounting clamps for installation.
• Verify axle housing clearance and cylinder mounting position before fabrication.
• Confirm steering arm geometry, tie rod connections, and available cylinder travel.
• Check clearance at full steering lock and throughout suspension articulation.
• Requires a compatible steering column connection and secure orbital valve mounting.
• Hydraulic hoses must be routed away from exhaust heat, moving suspension components, and sharp edges.
• Not intended as a direct bolt-on kit for factory steering systems.

Installation Requirements:

• Custom steering cylinder mounting and alignment.
• Secure orbital valve installation and steering column connection.
• Proper hydraulic hose routing and fitting installation.
• Verification of pump compatibility and accessory drive alignment.
• System filling, bleeding, and leak inspection.
• Steering stop adjustment to prevent cylinder overtravel or mechanical binding.
• Complete steering inspection before operating the vehicle.

Builder Note: Full hydraulic steering on a Rockwell axle requires careful planning around cylinder placement, steering arm geometry, and hydraulic hose routing. Mock up the cylinder and clamps before final fabrication, then cycle the axle through full steering and suspension travel to verify clearance. Proper pump alignment, system bleeding, and steering stop adjustment are essential for dependable operation under heavy tire loads.

What axles does the PSC FHK300P Full Hydraulic Steering Kit fit?

The FHK300P is designed for custom off-road vehicles equipped with 2.5-ton Rockwell steering axles. Installation requires proper cylinder mounting, steering geometry, and hydraulic plumbing.

What size hydraulic steering cylinder is included?

The kit includes a double-ended hydraulic steering cylinder with a 3.0" bore, 9.0" stroke, and 3/4" rod configuration, along with four mounting clamps.

How many turns lock-to-lock does this steering kit provide?

The supplied configuration provides approximately 3.9 steering wheel turns lock-to-lock using the 200cc orbital valve and 3.0" x 9.0" cylinder. Actual results depend on the final steering system setup and usable cylinder travel.

What steering pump comes with the PSC FHK300P kit?

The kit includes the PSC SP1405 GM High Flow P-Series power steering pump, designed to replace compatible factory Saginaw P-series pumps.

Will this steering kit fit my GM V8 engine?

The included pump is intended for compatible GM V8 applications using factory-style P-series Saginaw pump brackets, including certain 1980-and-newer configurations. Verify mounting brackets, pulley alignment, and accessory drive compatibility before ordering.

Does this kit work with Hydroboost brakes?

No. This FHK300P configuration is specified for installations without Hydroboost. Vehicles using hydraulic brake assist require a steering pump and plumbing configuration designed for that system.

Does the kit include the orbital valve, hoses, and fittings?

Yes. The kit includes a 200cc steering orbital valve with a 4.75" stem, a complete hydraulic hose and fitting package, and supporting mounting hardware.

Is this a complete bolt-on steering kit?

No. Although the kit includes the major hydraulic steering components, installation requires custom cylinder mounting, orbital valve placement, hydraulic plumbing, and verification of steering geometry and clearance.

Why use a double-ended steering cylinder on Rockwell axles?

A double-ended cylinder provides balanced hydraulic displacement in both steering directions and is commonly used in full hydraulic steering systems for heavy-duty off-road axles. The 3.0" bore provides substantial steering force for large tires and demanding terrain.

Can the PSC FHK300P be used on a street-driven vehicle?

This full hydraulic steering kit is intended for dedicated off-road and competition applications rather than regular street use. Full hydraulic steering systems may not meet applicable road-use requirements.

What should be checked during installation?

Verify steering cylinder alignment, mounting security, steering arm geometry, orbital valve connections, hydraulic hose clearance, and pump compatibility. The system must be properly bled, inspected for leaks, and checked through full steering and suspension travel before use.