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When Should You Use This Checklist?
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Step 1: Match the Machine to the Actual Job
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Step 2: Treat Price Searches as Research, Not Answers
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Step 3: Verify Serial Number, Hours, and Service Trail
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Step 4: Check the Water Pump Before You Cold-Start It
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Step 5: Take a Breaker Bar and Remove One Lower Guard
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Step 6: Run the Machine Warm and Use Every Function
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Step 7: Calculate a Doosan Forklift Price Like You Mean It
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Step 8: Plan the Truck Before You Pay
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Three Mistakes I Still See in Purchase Orders
When Should You Use This Checklist?
You're about to buy a used machine, finance a rental return, or add a second unit to a fleet. It doesn't matter if the listing says 2022 Doosan excavator, Doosan forklift, or a familiar brand from another color. I run the same page before I approve the final number.
I handle parts and service orders for a rental company, and I've been in this seat for 11 years. I've personally made and documented nine significant equipment buying mistakes. They added up to roughly $41,700 in wasted budget. That number bothers me because almost every one was preventable. So now I keep a short checklist, the same one below, and I still use it every time.
Two rules before you start. Do this inspection at the seller's location if possible. And if a seller won't let you look at service records or remove a cover, treat that as a red flag, not a challenge.
Step 1: Match the Machine to the Actual Job
The most expensive mistake is not choosing the wrong used unit—it's choosing a perfectly good unit for the wrong task. If you move pallets and materials, an excavator will not beat a forklift. If you dig basements or grade slopes, a forklift will not beat an excavator. List the job first.
If that job includes breaking concrete, you need to know the auxiliary hydraulic flow, not just horsepower. Breaking concrete and breaking loose a seized bolt are different jobs. The first needs a hydraulic hammer and enough oil flow. The second needs a long breaker bar and patience. Neither should be the reason you buy a particular machine.
Step 2: Treat Price Searches as Research, Not Answers
If you search '2022 Doosan excavator' or 'Doosan forklift price', you'll get a list of ads, not a definitive number. I've seen the same machine model vary wildly because one had 800 hours and another 4,000, or because one included a quick coupler, extra buckets, warranty, and delivery. The cheapest ad can be the most expensive machine you ever buy.
I compare three sources before making a decision: current dealer listings, auction results from the last 90 days, and public manufacturer spec sheets. As of January 2025, prices are still changing due to interest rates and local demand. Be suspicious of any listing that's older than 30 days and still trying to present itself as fresh.
Also make sure every quote includes line items for delivery, filters, fluids, inspection, and minor wear items. Those line items are where hidden costs hide.
Step 3: Verify Serial Number, Hours, and Service Trail
A 2022 Doosan excavator can have 700 or 4,000 hours. Both can be fine, but in different ways. Low hours with no maintenance history can be riskier than high hours with receipts.
I once approved a purchase based on a photo of an hour meter. When the machine arrived, the serial plate didn't match the registration. It took weeks to straighten out. That was embarrassing. Now I take a photo of the serial plate, hour meter, and any stamped VIN, and compare it to the title before money moves.
Ask for service records, not a promise that it was 'always maintained.' If they don't have records, get an independent mechanical inspection. Also check dealer support for that exact model year. If parts are hard to get, the price doesn't matter.
Step 4: Check the Water Pump Before You Cold-Start It
This is the question I now ask on every lease-return: how does a water pump work? Because if you don't understand that, you won't know what to inspect.
The short version: an engine drives a pump with a belt or gear. The pump has an impeller inside. When the engine spins, the impeller pulls coolant from the radiator and pushes it into the engine. The coolant flows through the block, collects heat, and moves to the radiator, where the fan and airflow remove that heat. The pump must create enough pressure; otherwise the coolant just sits and temperature climbs.
On any used machine, including a 2022 Doosan excavator, look around the water pump for dried spray or residue, corrosion near the weep hole, and cracks in the belt or pulley. Leave the radiator cap alone until the engine is cold. If you start the machine and it heats up into the normal range and then stays steady, the pump is probably okay. If the temperature rises fast on the gauge or drops randomly, do not assume it's just a thermostat. It can be a worn impeller.
Most people ask, 'does it overheat?' The better question is: 'has the water pump ever been replaced, and can I see the maintenance record?' If that pump has leaked before, you're buying someone else's problem.
Step 5: Take a Breaker Bar and Remove One Lower Guard
I carry a 1/2-inch drive breaker bar and a small socket set to every inspection. Not for breaking fasteners loose—for removing the lower guard or skid plate. Most buyers don't ask to do this. Sellers expect it even less. But leaks, old repairs, and rust hide under guards.
Use the breaker bar after the machine has been running and warm. Oil at operating temperature leaks more. If the skid plate is bolted on, ask permission and put it back. Look for fresh drips or clean areas where someone washed away a problem. That ten-minute check can save you from a $3,000 repair.
Step 6: Run the Machine Warm and Use Every Function
Warm oil reveals more than cold oil. Operate the bucket, boom, swing, travel, and any auxiliary circuit. If you're testing a Doosan forklift, raise and lower the mast, tilt it, use the side shift if it has one, and drive forward and reverse. Watch for slow movements, vibration, or delay.
At full RPM, check for cylinder drift with the bucket or forks in the air. Take a video for later comparison. Modern machines have dashboard fault codes; if you see an active code, write it down before you get distracted.
Step 7: Calculate a Doosan Forklift Price Like You Mean It
If material handling is the actual need, use a detailed comparison sheet. A Doosan forklift price can change by $5,000 or more without the machine itself changing. Mast height, tire type, load backrest, side shift, fork carriage, fuel type, and cab configuration all affect the real price.
Electric forklifts often quote without battery and charger. Battery and charger add thousands and need to match voltage and capacity. Internal combustion forklifts sometimes exclude overhead guard, spark arrestor, or attachment plumbing. Check the data plate and ask about load capacity at the standard 24-inch load center. Yes, these details sound like homework. They're the homework that prevents 'it seemed like a deal.'
Step 8: Plan the Truck Before You Pay
The first time I bought a machine, I didn't ask how it would get to my yard. The second time, I did. It still went wrong because the driver showed up with a trailer that was legally too small.
It doesn't matter if the truck you want is a custom luxury truck—some people search 'Maybach truck' when daydreaming about comfortable hauling. For construction equipment, the badge means nothing. What matters is truck GVWR, trailer GVWR, payload, brake controller, tie-down points, and permits if you're moving a wide or heavy load. Get those numbers in writing before you sign.
Three Mistakes I Still See in Purchase Orders
After all these steps, here's the condensed section I add to any quote for our team:
- Mistake 1: Trusting 'serviced regularly' without receipts.
- Mistake 2: Only checking the coolant level, not asking whether the water pump has been replaced or whether the cooling system was pressure-tested.
- Mistake 3: Comparing base prices instead of ready-to-work costs, including attachments, delivery, fluid and filter service, and transport.
I still get tempted by clean listings and low numbers. The checklist slows me down. An informed customer asks better questions and makes fewer expensive mistakes. That's why I don't explain equipment choices with confusing terms; I'd rather show you what I'd check. In the end, you're the one who has to sit in the seat and pay for downtime.
