35 Years of Hydraulic Expertise · Old-School Communication. New-School Service.
35 Years of Hydraulic Expertise · Old-School Communication. New-School Service.
Serving Massachusetts, Connecticut, Rhode Island, New Hampshire, Vermont and Maine from Clinton, MA.
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Every symptom on this page carries one of three labels. The label tells you where your own checking safely stops. This is not a liability disclaimer — it is the honest answer to a question facility managers ask us constantly: how much of this can my own people handle?
Tier 1 · Site Check
Tier 2 · Qualified Maintenance
Tier 3 · Service Technician
480 volts, three phase. An arc flash inside a compactor control cabinet is a burn injury, not a shock. The control components inside that cabinet run on 120V or 24VDC — which is exactly why people open the door and get hurt. The 480V line side is right there beside them.
Stored hydraulic energy. A compactor parked with the ram out has a loaded cylinder and pressurized lines even with the motor off and locked out. Cracking a fitting “to see if there’s pressure still in it” is how people get injection injuries. Pressure is relieved deliberately and confirmed at the gauge before anything is opened.
The safety framework behind these tiers comes from ANSI Z245.2 (Stationary Compactors — Safety Requirements for Installation, Maintenance and Operation), OSHA 29 CFR 1910.147 (Control of Hazardous Energy), and NFPA 70E (Electrical Safety in the Workplace). Welding and cutting on a building in Massachusetts falls under 527 CMR 1.00, Chapter 41.
| Style | What it is | Typical site | What fails most |
|---|---|---|---|
| Self-contained | Power unit and container built as one sealed unit; the whole assembly leaves on the truck | Supermarkets, restaurants, hospitals, food processing | Container floor and seam rust-through, rod seals, door gaskets, odor complaints |
| Stationary (two-piece) | Power unit bolted to a slab feeding a separate detachable container, typically 30–42 yd³ | Retail, distribution centers, manufacturing | Container latching and guides, ram wear blocks, hauler-caused damage, weak compaction |
| Chute-fed, roll-around container | Ram under a building trash chute discharging into a 2–6 yd³ cart or carousel | Mid- and high-rise residential | Chute doors and interlocks, cart and track damage, jams, chute structure |
| Chute-fed bagging unit | Small ram compacting into a heavy-gauge bag on a carousel or box former | Smaller residential buildings | Bag-change interlocks, carousel index sensors, neglected oil service |
| Pre-crusher | Heavy-wall unit that breaks bulky material before it enters the container | Manufacturing, C&D, furniture retail | Cylinders and structural welds — highest operating pressures on the site |
Scroll table horizontally →
16 symptoms · 11 with a full guide
18 symptoms · 2 with a full guide
12 symptoms · 2 with a full guide
6 symptoms
Service balers too? Baler troubleshooting is here.
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The compactor sat 12 feet from the building and perpendicular to it, rather than parallel and tight. The chute had to run that full distance and drop roughly 5 feet from the bottom of the building’s trash door to reach the top of the compactor’s charge area.
That geometry puts a long, steep, unsupported span between the building and the machine — and every compactor cycle sends vibration back up it. Over time the three legs holding the chute bent, the support welds broke, and the chute was allowed to pull away from the wall by three inches or more.
We brought in a telehandler to support and reposition the chute, then reconstructed the legs with proper support and bolted them to concrete feet. We resealed the building-to-chute cavity with fire-rated foam and installed new pressure-treated boards to support the building-to-chute connection.
The lesson for anyone with a similar layout: a compactor set perpendicular to the building with a long extended chute and a steep drop is a structure that needs inspecting on a schedule, not a chute you can forget about. A three-inch gap at the wall did not appear overnight — it was measurable a long time before it became a repair.
Warning signs, control functions, the chute security door interlock test, disconnect placement, deadman controls and point-of-operation guarding, and area condition. Follows the safety framework in ANSI Z245.2 for stationary compactors.
41 inspection points across five sections, with signature lines for the technician and the customer.
Electrical, hydraulic and mechanical, and structural — with separate columns for compactors and balers, and the A / OK / Replace / Replaced marking legend our techs use in the field.
82 inspection points, including cycle time, oil temperature, and the pressure switch test we run with a diagnostic tool between the couplings.
We schedule the inspection for just before the unit is due to be emptied, so the pressure and timing can be checked against a real full load rather than an empty chamber.
If the unit is not full when we arrive, we place a diagnostic tool between the couplings and cycle the machine. That tool lets us test the pressure switch settings directly instead of guessing at them.
The pressure switch is what tells your hauler the container is full. When it drifts, you either pay for pulls on half-empty containers or you overpack them until the door warps. It is worth testing properly.
A maintenance contract cannot guarantee you will never have a breakdown. What it does is find the issues that would otherwise have turned into an emergency call — and it puts a trained technician in front of your staff a few times a year, which is when most of the useful safety and operating conversations actually happen.
It is easy to skip maintenance while a unit is working fine. A slow leak repaired on a scheduled visit is not a hydraulic failure on a Friday afternoon.
We respond within 2 hours of a call, 24 hours a day, 7 days a week. On an emergency, and depending on travel, we can be on site as soon as 4 hours.
Normal response depends on when the call comes in. A call early in the day usually gets a same-day response; a call later in the day might be within 24 hours.
We prioritize systems that are not operating over systems that are working but need attention that is not a safety issue. If your machine is down and your dock is filling up, that moves ahead of a scheduled adjustment somewhere else.
We find the actual fault, not the symptom.
We determine when the unit can be emptied, if it needs to be, so the repair can actually happen.
We establish what is available and when it lands.
Labor and parts, itemized, before we proceed. No surprises on the invoice.
We coordinate the clean-out, the parts arrival and the onsite techs so they all land together, and make the repair as soon as the schedule allows.
Capabilities
We are a hydraulic shop that also does the electrical and the mechanical, which is unusual. It means one company diagnoses the whole machine instead of three trades pointing at each other.
Confirm the main disconnect is on, no emergency stop button is pushed in, the access and chute doors are fully closed, and the container is properly seated and latched. Note whether the motor runs, whether the ram moves, and whether any indicator light is on. Do not open the control cabinet or any guard. That information alone often shortens the service call.
A running motor with a stationary ram points to the hydraulic side: a sheared pump coupling, a failed pump, oil below the pump suction, a closed suction valve left shut after service, a relief valve stuck open, or a directional valve that is not shifting. Oil level can be checked safely with the machine locked out; the rest requires a qualified technician.
Falling compaction force is the usual cause: a relief valve that has drifted or worn, a pump losing volumetric efficiency, a cylinder bypassing internally past the piston seal, or a pressure switch ending the cycle early. The extra hauls show up on your invoice long before anyone notices the machine is weak.
T&T Weber Hydraulic Inc.
184 Stone St, Unit 5
Clinton, MA 01510
