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978-368-3325
Compactors · Hydraulic · H-6

Your Compactor Stopped Packing Tight. Here's What It's Costing You.

A compactor that suddenly needs more pulls has lost compaction force. Relief valve set low or worn, a pump losing efficiency, a cylinder bypassing internally, or a pressure switch ending the cycle early. The hauling invoice usually notices before anyone else does — and it is the one symptom on this list you can price yourself.
Get the Pressure Checked — 978-368-3325
All Hydraulic Symptoms
Tier 1 to price it and read the gauge. Tier 3 to adjust anything.
Start Here

Price It From Your Own Invoices

This is the only symptom on the site you can put a number on without a technician. Pull twelve months of hauling invoices and do this arithmetic before you call anyone.

Count pulls per month, this year.

Straight off the hauling invoices. Use a full month, not a busy week.

Count pulls per month, same months last year.

Same months matters — waste volume is seasonal at most sites.

Subtract.

Extra pulls per month is the whole measurement.

Multiply by your per-pull charge.

Haul fee plus any disposal or tonnage that scales with the pull.

Multiply by twelve.

That is the annual cost of the fault, and it is the number to weigh the repair against.

Worked example — fill in your own figures

A site pulling 8 times a month last year is pulling 10 now, with no change in the business. That is 2 extra pulls × your per-pull charge × 12 months. At a $300 pull that is $7,200 a year, being spent to haul air.

The figures above are placeholders — your per-pull charge and your pull counts are the only ones that matter. The point is that the arithmetic is simple and you already have both numbers.

Rule out the boring explanation first

More pulls can simply mean more waste — a new tenant, a seasonal swing, a neighboring building using your compactor, or a change in what’s being thrown away. Compare like months, and ask whether anything about the site changed before assuming the machine did.
Step Two

Confirm the Machine Actually Lost Force

Two checks, both Tier 1, both from outside the machine.

Read the gauge at full stall.

Let the ram run into a packed load until it stops advancing. Note the highest reading it reaches.

Compare it to the data plate.

The machine's rated pressure is on the plate or in the manual. A stall pressure well under the rating is lost force, measured.

Watch where the cycle ends.

A ram that stops short and retracts before it has really packed points at the pressure switch, not the pump.

Look at the container.

Loose, bridged material with obvious voids is different from a container that is genuinely full. Photograph it before the next pull.

If the gauge reads normal but it still packs loose

That points at the pressure switch ending the cycle early rather than at a loss of pressure. The machine is making force; it just is not being allowed to finish. That is a cheaper repair than any of the others on this page.

Narrowing It

Four Causes, Cheapest First

Pressure switch tripping early

The full-signal circuit ends the cycle before the ram has done its work. Test and reset, or replace the switch. The least expensive of the four by a wide margin.

Relief valve set low or worn

The relief is dumping before the system reaches rated pressure. Sometimes an adjustment, sometimes a worn seat that needs the cartridge replaced.

Pump losing efficiency

An older pump makes less flow and holds less pressure. Usually arrives alongside longer cycle times.

Cylinder bypassing internally

Oil crossing the piston seal is force that never reaches the load. Often comes with drift and heat as well.
Why It Keeps Getting Worse

The Cost Compounds Quietly

Weak compaction is the failure people live with longest, because the machine still runs and the waste still goes away. It is also the one with a monthly invoice attached.

It never plateaus

A relief that is drifting keeps drifting. A pump that is wearing keeps wearing. The extra pulls per month go up, not sideways.

It hides the real fault

Every month of extra hauling is a month the underlying cause — bypass, heat, a failing pump — keeps doing damage.

The repair is usually smaller than a year of hauling

Which is the argument for measuring it. Once the annual number is on paper, the decision tends to make itself.
Before You Call

What We Need to Quote It

You do not need all of this — the make and model plus photos is usually enough to get started. But the more of it you have, the closer the first number is to the final one.
  • Bore — Inside diameter of the barrel. Stamped on many data plates; otherwise we measure it.
  • Stroke — Fully extended length minus fully retracted length.
  • Rod diameter — Across the chrome, measured with calipers if you have them.
  • Mount type — Clevis, cross-tube, trunnion or flange — and the pin diameter.
  • Pin-to-pin retracted — Center of one mounting pin to center of the other, ram fully in.
  • Ports — Size, thread type, and whether they face the same direction or opposite.
  • Machine make and model — Off the data plate. It often tells us the cylinder before you measure anything.
  • Photos — The whole cylinder in place, both mounting ends, and a close shot of the rod.

If you can't get the measurements

Don’t climb on the machine to get them. Send the make, the model and the photos, and we will take the dimensions when the cylinder is out — or bring a replacement with us if we already know that machine.

Safety

Where Your Checking Stops

Tier 1 · Site check

Counting pulls, reading the gauge, watching the cycle and photographing the container. Nothing opens.

Tier 3 · Service technician

Adjusting or replacing the relief valve, testing pump output, testing or replacing the pressure switch, and any cylinder work.

Do not crack a fitting to check for pressure

Stored hydraulic energy is the hazard that makes this Tier 3 no matter how simple the repair looks. Loosening a fitting “to see if there’s still pressure in it” is how people get injection injuries — which do not look serious for the first hour and are a surgical emergency. Pressure gets relieved deliberately and confirmed at the gauge.
Questions We Get

Weak Compaction, Answered

My hauler says the container is full. Can they be wrong?
They are reporting what they see, and a container that is genuinely full of loosely packed material is full. The question is not whether it is full, it is how much waste is in it when it gets that way. That is what changed.
It can be. Bulky items bridging in the chamber, or a load pattern that leaves voids, will produce loose fills with a perfectly healthy machine. The gauge reading at stall is what separates a loading problem from a pressure problem — a machine making rated pressure is not the reason the container is light.
The pull count is the measurement, and you already have it. The gauge tells you why. If the machine has no working gauge, that is worth fixing on its own — it is the cheapest diagnostic instrument on the unit and it is the first thing a technician looks at.
Sometimes it is genuinely set low and needs resetting to the manufacturer’s rated pressure. But turning a relief up past rating to compensate for a worn pump or a bypassing cylinder overloads the structure and the cylinder to hide a fault, and it is how ram chests and welds get cracked. Pressure gets set to the plate, not to taste.
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T&T Weber Hydraulic Inc.
184 Stone St, Unit 5
Clinton, MA 01510

Where we go

Onsite compactor and baler service throughout New England — Massachusetts, Connecticut, Rhode Island, New Hampshire, Vermont and Maine. Cylinder reseal and replacement, domestic replacement cylinders, hydraulic, electrical and controls, and full mechanical repair.