I review roughly 200 unique items every year—hoists, motors, gearboxes, the works. Over the last four years, I've rejected about 8% of first deliveries. Not because vendors are sloppy, but because what looks right on paper isn't always right on the pallet. When you're talking about an electric chain hoist from Demag—a brand with genuine industrial heritage—the tolerance for 'close enough' is zero. Here's a 5-point checklist I use before signing off on any new unit. It took me a few expensive mistakes to get here.
Before You Start: What This Checklist Is For
This isn't a replacement for the OEM installation manual. This is the sanity check you do before you start rigging and wiring. If you're a plant engineer, a procurement specialist, or a maintenance lead accepting delivery of a Demag hoist, this is for you. It takes about 20 minutes. It has saved me from sending back at least three units that 'looked fine' to the receiving crew.
Point 1: Visual Identity & Spec Match (5 Minutes)
The first thing I check isn't the lifting capacity. It's the nameplate. A Demag electric chain hoist will have a clear, laser-etched or stamped plate. Match the serial number to your packing slip and your purchase order. This sounds absurdly basic, but I've seen a facility receive a DC-Pro 10 model when they ordered a DC-Pro 5. The capacities are different, the chain is different, and the attachment hardware is different. The crate looked the same. This mismatch would have only been caught during the load test, which is hours of wasted labor.
Also check the voltage rating. A 400V unit won't run properly on a 480V line without a transformer. It's a simple check that takes 30 seconds, yet I've had two vendors argue it was 'within tolerance.' It wasn't. We rejected both.
Point 2: Chain Condition & Lubrication (5 Minutes)
Pull out about three feet of load chain. This is the part that gets overlooked because it's 'pre-lubricated from the factory.' In my experience, that factory lubrication is inconsistent. On a unit we received in Q1 2024, the chain was dry in the middle of the bundle—the oil had settled to the bottom during shipping. The chain was running hot within the first week of operation.
Feel the chain. It should have a consistent, slightly oily film. If it feels dry or tacky, flag it immediately. Check for kinking. New chain can sometimes be slightly twisted from the packaging. If you see a twist you can't work out by hand, don't install it. Demag chain is heat-treated and graded for specific hoists. A kinked chain dramatically shortens its service life, regardless of the brand's reputation.
Point 3: Hook & Latch Security (3 Minutes)
I don't care if this is your 50th hoist. Check the safety latches. I use a simple test: open the latch, let it snap back. It should close with an audible, positive click. If it's sluggish or doesn't fully close, the spring is compromised. We had a batch of safety hooks from a supplier (not Demag, but a component supplier) where the latch spring was under-tensioned. On a 2-ton hoist, that's a $22,000 redo waiting to happen if the hook had dropped a load.
Also check the hook throat opening. The spec sheet will list it. A simple steel rule check confirms it. This matters if you're attaching to a specific beam clamp or trolley. I once watched a team try to force a hook onto a rail with a throat opening that was 3mm too small. They 'made it work' by grinding down the beam. That beam then failed a routine inspection six months later. The cost of that mistake? A full bay shutdown for reinforcement.
Point 4: Control Pendant & Emergency Stop (4 Minutes)
Plug the hoist into a temporary power source (if available and safe) or perform a continuity check on the pendant cable. The Demag pendant is usually well-sealed, but shipping can damage the strain relief. If the cable jacket is nicked or the strain relief is loose, moisture ingress is a real risk in a workshop environment. I've seen a unit fail after three months because a tiny cut in the pendant cable allowed coolant mist to travel up the wiring harness.
Press the emergency stop button twice—once to activate, once to reset. The mechanism should feel crisp. A sticky E-stop is a liability. We had a $1,800 project delayed by two weeks because the E-stop on a new hoist didn't reset properly during the commissioning inspection. The vendor had to send a replacement pendant from a different warehouse. The cost wasn't the part; it was the downtime.
Point 5: Documentation & Spare Parts Consideration (3 Minutes)
This is the one that seasoned engineers often skip. Check the documentation package. It should include the EC Declaration of Conformity (or equivalent for your region), the load test certificate, and the wiring diagram for your specific voltage configuration. Without this, you cannot legally commission the hoist in most industrial settings. I now include a clause in every contract that documentation must be complete before I authorize payment. Why? Because chasing paperwork after installation is a nightmare. I've had to track down a wiring diagram for a six-year-old hoist because the original pouch got lost. It took three emails and a week of back-and-forth with a parts distributor.
Speaking of parts: before you finalize installation, note the exact model and serial number of the motor and brake assembly and the chain pitch. This is your insurance policy. When you need a replacement chain or brake lining in 18 months, you won't be guessing. You'll have the spec. Prevention over cure. Five minutes of data collection now can save five days of downtime later.
A Note on What Can Go Wrong (Even with a Good Checklist)
I only believed this list was crucial after ignoring Point 2 once. We received a batch of eight hoists, all from the same shipment. The chains looked fine visually. I skipped the feel test because we were behind schedule. Six months later, we had two units with abnormal chain wear. The supplier's warranty covered replacement, but the labor and crane rental to swap them out cost us nearly $4,000. Now every contract I write includes a sentence: 'Chain lubrication condition must be verified and documented upon receipt.' Simple.
Is this checklist perfect? No. But it gives you 80% prevention against the most common new-equipment installation problems I've seen over 200+ orders. The 20% that slips through are usually design issues, not manufacturing defects. And that's a different conversation entirely.
