Settle for Weak Hydraulics? It’s Time to Give Your CAT Excavator Its Power Back

There’s nothing more frustrating than watching a great excavator lose its edge. You know the signs: the bucket curl slows down, the tracks feel weak when you’re trying to climb a pile of loose dirt, and the whole machine starts to lag the moment the weather gets hot. When your main hydraulic pump starts wearing out, your entire job site slows down right along with it

A lot of guys try to save a buck by throwing a patch-kit at a tired pump—swapping out some pistons or putting in a new wear plate in the field. But let’s be realistic: if your pump housing or barrel is already scored and pitted, a partial rebuild is just a countdown to your next breakdown. You’ll end up pulling the pump again in a few months, losing days of work, and paying for fresh hydraulic oil all over again. Dropping in a complete, brand-new main pump assembly is the only real way to get your machine back to its original factory speed and breakout force.

At Swafly Engine, we know that a machine sitting idle is just a machine burning money. To keep your fleet moving, we have filled our warehouse with a fresh stock of our most popular Caterpillar Main Hydraulic Pumps, ready to ship out the door today.

Our Hottest Demand CAT Hydraulic Pumps Right Now:

• The Utility & Groundwork Fleet (312GC & 320B): For those running the highly efficient 312GC or keeping a classic 320B earning its keep, we have direct-replacement pumps built to match factory flow specs exactly. They are true drop-in units, meaning your mechanic can bolt them right up without any custom modifications.
• The Next-Gen Production Models (320GC / 323GC): Newer excavators rely heavily on smart electronics to manage hydraulic flow. Our hot-selling 320GC and 323GC pumps are built with updated regulator logic that syncs perfectly with your machine’s ECM, restoring that crisp joystick feel while keeping your fuel burn low.
• The Industry Workhorses (320C / 320D): Go to almost any job site in the world, and you’ll see a 320C or 320D digging a trench. Because these machines work relentless hours, we keep a heavy
• The Bulk Earthmovers (330A/B & 330C/D): If you are running heavy extraction, deep digging, or demolition with 330A, 330B, 330C, or 330D platforms, you need a pump that won't flinch. Our heavy-displacement 330-series assemblies feature high-tensile internal components engineered specifically to handle constant high-pressure spikes and heavy attachments.

Real Parts, Real Support, Zero Logistics Hassles

Sourcing heavy components from overseas shouldn't give you a headache. We handle global shipping, heavy-duty crating, and customs paperwork every single day.

Before any pump goes into a crate, our technical team double-checks your excavator's specific serial number. We verify the exact spline counts, port locations, and regulator configurations so there are zero surprises when it arrives at your shop. Everything is thoroughly drained, sealed tight against dirt, and securely bolted down inside export-grade wooden boxes so it clears your local port smoothly and arrives ready to work.

Don't wait until your main pump completely grenades itself, sending metal debris through your entire hydraulic loop and ruining your main control valves.

Take a look at our current stock at www.swaflyengine.com or shoot us a message with your CAT model and serial number. We’ll look up the exact technical match and get an honest, ready-to-ship quote over to you right away.