7 Tool and Hydraulic Mistakes I've Made: Enerpac Press, P39 Pump, Router Bits, and HDPE to Gate Valve

I'm a maintenance lead, handling equipment and tool orders for 8 years. I've personally made and documented 14 significant mistakes, totaling roughly $18,000 in wasted budget. Now I maintain our team's checklist so nobody repeats them. Below are the questions I get asked most, plus the one I wish someone had asked me in 2017.

Do I really need an Enerpac hydraulic press, or can I get away with a cheaper press?

I get this one a lot. In 2021, I tried to save $700 on a generic off-brand 20-ton press. It worked for two weeks. Then the frame flexed, the ram leaked, and a job stopped for half a day. I ended up buying an Enerpac hydraulic press anyway—after paying for the first one. The $200 I saved turned into a $1,300 problem when I counted downtime, wasted hours, and a rushed replacement (as of early 2025, at least). My rule now is simple: for high-force work, I buy from a supplier with a support network and test standards. I'm not saying every cheap press is a catastrophe, but the total cost of the cheap one was higher. If the press is only for light, occasional work, a lighter unit may be fine. But if a failure can hurt someone, I stop calculating the unit price.

Is the Enerpac P39 hydraulic hand pump worth it for occasional use?

Honestly, it depends. I use the Enerpac P39 hydraulic hand pump with a single-acting cylinder for controlled alignment work. It's not fast—if you're cycling a cylinder all day, get an electric pump. But for precision, the two-speed feature is useful: it moves the piston quickly under low pressure, then switches to high pressure when the load is met. I first borrowed one in September 2022 and noticed the release valve control felt much more predictable than the pump we had. So I picked one up for our kit. Treating it like a production pump would disappoint you. Treating it as a setup tool, I've been happy. Just keep the quick couplings clean and check oil level. That's where most hydraulic complaints start.

Why did the cheap 30-piece router bit set cost me more in the long run?

Rookie mistake. I bought a 30-piece router bit set because the price per bit looked amazing. It was basically $1.50 a bit. What could go wrong? In practice, the bits chattered on plywood, one snapped during a plunge cut into oak, and the finish was rough. I had to redo a cabinet door that cost $240 in materials and my weekend. The set wasn't entirely useless; I still keep it for non-critical cuts. But those bits are the reason I now buy individual carbide bits for the cuts I actually do. The set saved me $40 on the initial purchase. That $40 saving turned into $240 in redo materials plus the cost of the better bits. I was being penny-wise and pound-foolish.

What should I know before buying a slim-jaw adjustable wrench D86932?

The main thing is: it's a wrench, not a hammer and not a pry bar. I didn't appreciate slim jaws until I had to reach a hydraulic fitting in a tight spot. The slim-jaw adjustable wrench D86932 got in where my standard wrench didn't. Then I made the mistake in 2020 during a panic repair—I pushed on it sideways to break a fitting loose. The adjustment mechanism jammed. A replacement cost me more than the original. New rule: if it doesn't fit after you've adjusted it, stop. Re-adjust. Pull toward yourself when you can, and keep the jaw faces square on the nut. It sounds basic, but in a tight space your instincts lie to you. I also keep a backup slim-jaw adjustable wrench in the service truck now.

How to connect HDPE pipe to gate valve without leaks?

Don't test a threaded gate valve directly into HDPE. I did that in 2018, in a hurry, and it leaked. HDPE is soft and won't seal like metal threads; you need a transition fitting. The simplest way is a compression fitting with a stiffener insert designed for polyethylene pipe, then connect the gate valve to the adapter. Or use a flanged adapter. And don't over-tighten the compression nut—tightening until it feels solid is not the same as crushing the pipe. Over-tightening causes the pipe to deform, and then the leak gets worse. I learned this the expensive way when I had to dig up a line. A $40 transition adapter is way cheaper than that redo. Always pressure-test before you backfill. That part is not optional.

How do I know if a tool failure is my fault or the tool's fault?

This is the question I wish someone had asked me earlier. In 2019, I blamed a hydraulic cylinder for dropping a load. It turned out the coupling wasn't fully tightened, and the quick coupling was the wrong style for the hose. When I compared the pressure readings side by side—one on the pump gauge, one on the cylinder gauge—I finally understood: the tool was fine, my connection process wasn't. Dodged a bullet when I double-checked the gauge before the second lift. After that, I built a pre-use checklist. We have caught 47 potential errors in the past 18 months using that list. It's humbling, but the equipment rarely lies. It's usually my procedure, my selection, or my hurry.

Is buying the most expensive brand always the answer?

No. But I've stopped looking only at the price tag. In my experience managing maintenance orders for about eight years, the lowest quote costs more in a majority of cases. Not all, but enough. For one-time, low-risk jobs, the cheap option can be fine. For repeated use, safety, or anything that touches a load, I buy reliability. That's why I keep the slim-jaw adjustable wrench in my kit, use an Enerpac hydraulic press for heavy work, and choose transition fittings for plastic pipe. None of that is about being fancy. The questions I use are: What happens if this fails? How much would that cost? If the answer is more than the price difference, my decision is made. That simple calculation has saved me a ton of money.