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SD5 Series 2-Wheel / 4-Wheel Selector Valve, Hydraulic Pilot, Spring Return, SAE-16 Ports

Description & Features

The SD5 Series 2-Wheel / 4-Wheel Selector Valve Hydraulic Pilot Spring Return SAE-16 Ports is engineered for demanding hydraulic systems. Constructed from high-tensile strength cast iron it features a ground plated and polished steel spool with Buna-N seals ensuring reliability.

This selector valve operates with a maximum working pressure of 5000 PSI and can handle shock and surge pressures up to 6000 PSI with a flow capacity of 50 GPM.

Designed with SAE-16 ports the actuator is conveniently located on the Port D side. The 2-wheel / 4-wheel selector circuit supplies supercharge oil to non-driving motors to prevent cavitation during 2-wheel drive mode. Periodic switching to 4-wheel drive is recommended for cooling non-driving wheel motors during extended 2-wheel drive use.

MPN: C1EP17

Supplier Part Number: SD5BUBA7

Specifications

Actuator Type Knob	Body Material Iron	Circuit Type 2-Wheel/4-Wheel Selector	Connection Type NPT	Control Spring Return	Domestic/Import Domestic	Finish Chrome-Plated	grp Available Options Ports - 1/2 NPT, SAE-8, SAE-12, SAE-16, Actuator - Handle, Knob, Clevis, Pilot, 12 VDC Solenoid	grp Construction High-Tensile Strength Cast Iron Body, Ground, Plated and Polished Steel Spool, Buna-N Seals	Grp Specifications Maximum Working Pressure: 5000 psi, Maximum Shock and Surge Pressure: 6000 psi, Maximum Flow Capacity: 50 gpm	Nominal Size 3/4 in	Number of Handles 1	Number of Ports/Ways 3	Number of Positions 2	Seal Material Buna-N	Series SD Series

Product Questions & Answers (3)

Question by: Bobby R on Apr 26, 2025, 8:21 PM

Running a skid steer in 2-wheel drive most of the day, occasionally kick it into 4-wheel. What's this valve actually doing for the motors that ain't driving?

Answer by: Customer Support on Apr 28, 2025, 12:07 PM

When you're in 2-wheel mode, the non-driving motors still get a steady supply of supercharge oil routed through this valve. That keeps cavitation from developing in those idle motors, which is a real concern when they're spinning freely without load. Worth noting though, if you're staying in 2-wheel drive for long stretches, you'll want to cycle into 4-wheel drive every now and then just to push cooler oil through those non-driving motors and keep temps in check.

Question by: Sherry M on Jan 3, 2026, 8:52 AM

Wondering what this selector valve is typically used for?

Answer by: Customer Support on Jan 4, 2026, 9:53 AM

This 2-wheel / 4-wheel selector valve is handy for hydraulic systems where you need to switch between two-wheel and four-wheel drive, like on some tractors or heavy equipment. It prevents cavitation in the non-driving motors when you're running in two-wheel drive.

Question by: Brett W on Aug 22, 2025, 1:12 PM

got a SD5BUBA7 selector valve here, what’s it actually doing when i’m in 2-wheel drive?

Answer by: Customer Support on Aug 23, 2025, 6:36 PM

In 2-wheel drive mode, the circuit sends supercharge oil to the non-driving wheel motors so they stay fed and do not cavitate while they are being back-driven.