Not every leak leaves a puddle. We track hydraulic leaks and diagnose weak, slow, or overheating systems across the full circuit — so you fix the real cause before it starves the pump.
"It's losing fluid but I can't find where" is one of the most common hydraulic complaints — and one of the easiest to get wrong. The reason is that hydraulic leaks don't all behave the same. Some weep only under pressure or when the circuit is loaded. Some spray a fine mist that the wind carries off before it ever drips. Some run down inside a boom, a frame rail, or a bundle of hoses and show up far from the actual source. Chasing the first wet spot you find often means replacing a part that wasn't the problem.
The discipline is to work the whole circuit — the pressure side and the return side — and check the usual suspects methodically: every connection and fitting, the hoses (including the covered and flexing sections), the cylinder rods and seals, and the pump. A leak that survives that kind of look is a leak you've actually found, not one you've guessed at. The same approach applies to a system that's simply gone weak: slow lift, soft functions, or a machine that runs hot can come from internal bypass, a restriction, air, or a tiring pump — and each points to a different fix.
Why push on this rather than just topping off the fluid? Because a hydraulic system running low starves its pump, and heat and cavitation kill pumps fast. The pump is the priciest part in the system. A leak that's a cheap hose or fitting today becomes a pump tomorrow if it's ignored. Finding and fixing the real source early is simply the cheapest path.
Fluid loss and lost power are the system telling you something's wrong. These are the signs worth a diagnosis.
The reservoir keeps dropping with no clear puddle. A hidden leak — under pressure, misting, or running inside the machine — needs the whole circuit traced, not a guess at the nearest wet spot.
The machine runs hot or has gone weak. Overheating or sluggish, soft functions can mean internal bypass, restriction, or a tiring pump. Worth checking before the pump goes.
Oil showing up where it shouldn't. Any fresh oil on the machine or ground is a leak in progress. Cheap to fix now, expensive to fix after it's starved the pump.
Leak diagnosis is part of the full mobile hydraulic repair across Fresno County we bring to your equipment.
We'll work the whole circuit to find the real source — before it turns into a pump.
📞 Call (559) 206-3899Tell us the machine, what failed, and the best number to reach you. We'll get back to you to help figure out the problem and next steps — no obligation.
For a machine that's down right now, calling is fastest — but if you'd rather we call you, just leave your info.
Quick and simple — phone is the only thing we really need.