Hydraulic Parts Source

09/04/2026

We did it!

09/02/2026

Excessive whining or knocking in a hydraulic pump isn't just annoying. It's a sign of fluid starvation that can ruin internal swashplates and pistons in hours.

Use this step-by-step diagnostic tree to isolate the root cause before pulling the pump for a complete overhaul.

🛠️ Need a bench test or complete pump overhaul? Skip factory wait times and get your machinery back online. Send us your unit for a fast teardown evaluation or request an in-stock reman exchange: https://www.hydparts.com/contact-hps

08/31/2026

We’ve helped sales teams win deals they thought were lost. Why? Because we gave them more ways to say yes.

HPS helps inside sales teams get ahead of supply issues with better sourcing, more flexible product options, and fast answers.

08/28/2026

Ever wonder how we send out top-tier remanufactured hydraulic units without leaving a single trace? Neutral boxes, zero HPS branding, and 100% credit to you. We do the dirty work behind the scenes so your customers stay YOUR customers (and think you're absolute wizards at getting parts to them FAST.)

08/26/2026

You don't want to know the difference between servo and proportional valves in a pinch, so buckle in. We've got lots of information that will help you know what kind of valve you're looking at, SERVO or PROPORTIONAL.

1. A PROPORTIONAL VALVE controls flow or pressure in steps that follow an electrical signal. Send it more current; you get more flow. Send it less; you get less. It's a solenoid valve with a brain, built to respond in proportion to the input instead of just full-on or full-off. Most proportional valves run open-loop or with basic internal feedback from an LVDT.

Where you'll find them:
👉 Mobile equipment: lifts, cranes, ag and construction machinery
👉 Injection molding and press applications
👉 Any system where “close enough, fast enough” gets the job done

2. A SERVO VALVE is built for tight, closed-loop control. It reads the actual output, position, pressure, velocity, whatever the system is measuring, and constantly corrects itself against that feedback. The control loop never really stops adjusting.

Where you'll find them:
👉 Test stands and flight simulators
👉 Steel mills and metal forming lines
👉 CNC and precision motion control
👉 Any process where a fraction of a percent of error is a scrapped part

Not sure which one you're pulling off the machine?

A few quick checks:
✔️ Look at the actuator. A torque motor with a flapper-nozzle or jet-pipe stage usually means servo.
✔️ Check the nameplate. Brands like Moog, Rexroth 4WS, and Vickers SM4/SX4 are servo lines. Rexroth 4WRPE, 4WRA, and Vickers KDG4V are proportional.
✔️ Ask about the application. Fast, high-cycle, tight-tolerance work points to servo. General flow or pressure control points to proportional.

If you're still not sure, send us photos and the nameplate info. We'll tell you straight what you've got, no guessing. We've also attached a handy side-by-side table. Check out /www.hydparts.com/resource-library or contact us at www.hydparts.com/contact-hps

08/24/2026

Harvest season won’t wait for a slow hydraulic system. Inspect and service your agricultural equipment now before a lagging pump or valve leads to a complete breakdown in the middle of October.

https://www.hydparts.com/blog/188/harvest-season-hydraulics

Agricultural equipment hydraulic failures during harvest season cost distributors and their customers. Here's how to be proactive ahead of peak demand.

08/21/2026

Manage your system pressure thresholds with precision. Vickers pilot-operated pressure control valves offer reliable regulation, reduction, and redirection across three core lines:

⚙️ Unloading Valves (URG/T-06/10): Routes pump flow to tank at preset pressure to let pumps idle, cutting heat and saving energy in accumulator, clamping, or press applications. www.hydparts.com/catsearch/36/unloading-valve

⚙️ Reducing Valves (X, DGX, DGMX2): Maintain stable downstream pressure to protect clamp and pilot lines from main circuit spikes. Offered in cartridge, subplate, inline, and sandwich mounting (01, 03, 06, 10 sizes). www.hydparts.com/catsearch/35/pressure-reducing-valve

⚙️ General Purpose (R(C) Series): Pilot-operated flexibility for sequencing and counterbalance setups across 03, 06, and 10 port sizes. www.hydparts.com/catsearch/13/pressure-control-valve

Pressure control with precision.

📞 Questions or quotes? Call (888) 477-7278 or visit hydparts.com

08/19/2026

⚡OEM Quality, Without OEM Wait Time ⚡

Need hydraulic pumps or valves fast? Every remanufactured unit from HPS meets or exceeds OEM specs. We back it with a solid 1-year warranty.

Skip the long lead times and keep your operations moving.

https://www.hydparts.com/remanufacturing



https://youtu.be/agCaqeBBXHk?si=5o5PpMOyJ12_SwXF

When hydraulic pumps, motors, or valve cores fail, it’s usually a single component gone bad. The rest of the unit is often still in good operating condition. Hydraulic Parts Source inspects the unit, scraps the bad parts, and keeps the ones that still meet OE specifications, keeping them in our in...

08/17/2026

Whether you need remanufactured units, expert repair service, or technical resources, HPS has your back with:

✅ 30-minute average quote response
✅ Same-day shipping on most orders
✅ 1-year OEM-equivalent warranty

See how we can help your business stay ahead.

www.hydparts.com