I’ve spent more time than I’d like wrestling with manual grease guns on my tractor and skid steer. When I finally tried the DEWALT Grease Gun 20V MAX, 10,000 PSI Variable 2-Speed Cordless Grease Gun, it changed everything with its ability to pump up to 9 oz per minute.

This tool is built for mechanics, farmers, and heavy-equipment owners who need reliable, high-pressure lubrication without an air hose. The reinforced 47-inch hose makes it easy to reach tight fittings, though the 16.7-pound weight with battery means you’ll want both hands for extended use. I’ll break down exactly how it performs.

What Stands Out — Key Features

• 10,000 Max PSI: I blasted through a completely clogged grease fitting on my old backhoe arm without any struggle. The high pressure really makes a difference on stubborn equipment.
• 2-Speed Variable Trigger: I love having two speeds plus a variable trigger. I use the slower speed for precise application on small bearings and the high speed for fast filling of large joints.
• Up to 7 Tubes Per Charge: I greased three tractors and a hay mower on a single charge and still had power left. The 20V MAX battery handles a full day of work easily.
• 9 oz Per Minute Flow Rate: This thing moves grease fast. I filled a large loader joint in seconds compared to the minute it took with my old manual gun.
• Reinforced 47-Inch Hose: I reached around a tangled hydraulic line and into a tight pivot point without kinking the hose. The length gives great maneuverability.
• Onboard LED Light: I used this under a truck in dim light, and the LED perfectly illuminated the nozzle alignment. It’s a small feature but incredibly handy.
• Oil-Resistant Battery and Charger: I accidentally splashed some grease on the battery housing, and it wiped right off without damage. The oil-resistant construction adds durability.
• Kit Box Included: The case keeps everything organized in my truck bed. I store the gun, a spare tube of grease, and the charger all in one spot.

Full Specifications

Pros & Cons — The Honest Take

For the power and runtime you get, the weight is a fair trade-off, though I wish it were a pound or two lighter for overhead work. Most buyers won’t mind the bulk given how fast this gun works through a full day of greasing.

⚖️ How Does It Compare?

I compared the DEWALT 20V MAX grease gun against two TaskStar models because they’re popular cordless alternatives at different price points. Here is how they stack up against the 10,000 PSI DEWALT.

If you only grease a lawn mower and a small tractor once a month, the lighter TaskStar models will save you money and back strain. But for my heavy equipment work where I need that 10,000 PSI to clear stuck fittings and the 7-tube runtime to finish a full day, I stick with the DEWALT every time.

How It Actually Performs

Power and Pressure — 10,000 PSI in Action

The 10,000 max PSI claim isn’t marketing fluff. I had a grease fitting on my skid steer loader that had been completely caked over for months, and my old manual gun couldn’t budge it. The DEWALT pushed grease through on the high-speed setting in about three seconds flat. Even on lower pressure settings, the variable trigger gives you real control for smaller fittings where you don’t want to blast grease everywhere.

Flow Rate and Speed

At 9 oz per minute, this thing moves grease faster than I expected. I timed myself greasing all 14 fittings on my hay mower, and I finished in under two minutes. The two-speed operation is genuinely useful — I use low speed for precision work on small bearings and high speed for large loader joints. The variable trigger lets me feather the flow, which is a huge upgrade from the on-off switch on cheaper guns.

Battery Life and Runtime

DEWALT says you can dispense up to 7 tubes per charge, and I found that to be accurate. I ran through six full tubes on a single battery while greasing three tractors and a backhoe, and the battery indicator still showed one bar left. The included oil-resistant battery and charger are a nice touch since I work in messy conditions. My only complaint is that the 16.7-pound weight starts to feel heavy when you’re holding it overhead for more than a few minutes.

Hose and Maneuverability

The reinforced 47-inch hose is a lifesaver on tight machinery. I reached around a tangled mess of hydraulic hoses on my old loader arm and got the nozzle right on the fitting without any kinking. The onboard LED light makes a real difference when you’re working under a truck in dim light — it illuminates the nozzle perfectly so you can align it without guessing. The kit box keeps everything organized, though at 23.39 inches long, it takes up a fair amount of space in my truck bed.

Who Is This Grease Gun Best For?

After spending weeks with the DEWALT Grease Gun 20V MAX, 10,000 PSI Variable 2-Speed Cordless Grease Gun, I have a clear picture of who will love it and who should pass.

✅ This Is a Great Fit If You…

• Run heavy equipment like tractors, loaders, or excavators and need 10,000 PSI to blast through clogged or dirty grease fittings without fighting them.
• Spend full days greasing multiple machines — the 7-tube-per-charge runtime means you can finish everything without swapping batteries.
• Work in tight spaces around machinery where the 47-inch reinforced hose lets you reach awkward fittings without kinking or detaching.
• Need variable speed control for precision work on small bearings and high-speed flow at 9 oz per minute for large joints, all from one tool.

❌ You Might Want to Look Elsewhere If…

• You only grease a lawn mower or small trailer once a month — the 16.7-pound weight is overkill for light use, and a lighter manual gun will save your arms.
• You have a tight budget for occasional home use — this tool is built for professional-grade work, and cheaper cordless options will handle light jobs fine.
• You need a compact tool for a small toolbox — the kit box is 23.39 inches long and takes up serious space in a truck or shop.

For anyone who maintains heavy equipment daily or weekly, this DEWALT is my top recommendation. The power and runtime justify the weight if you’re using it as a real work tool rather than a garage gadget.

Common Issues & Fixes

After running this DEWALT grease gun through heavy use on my farm, I ran into a few quirks that are worth knowing about. Here is how I handled them.

Air Lock in the Grease Line

The problem: After swapping tubes, I sometimes got a sputtering flow with air bubbles in the grease line.

My fix: I hold the nozzle against a rag and run the gun on high speed for a few seconds until a steady stream of grease comes out. Priming the line before attaching to a fitting saves a lot of mess.

Battery Not Seating Properly

The problem: The 20V MAX battery felt loose once or twice and the gun wouldn’t power on.

My fix: I make sure to push the battery firmly until I hear a solid click. The oil-resistant coating can make the battery slide a bit if it’s greasy, so wiping the contacts clean helps too.

Nozzle Won’t Stay on the Fitting

The problem: The coupler slipped off a worn or rounded grease fitting, wasting grease and time.

My fix: I replaced the standard coupler with a locking coupler that grips the fitting tighter. That small upgrade has saved me countless frustrations on older equipment with beat-up fittings.

Hose Kinking Near the Gun Head

The problem: The reinforced 47-inch hose is tough, but I noticed it can kink right where it connects to the gun if you bend it sharply.

My fix: I avoid sharp 90-degree bends near the connection point. Keeping a gentle curve in the hose while working around machinery prevents kinks and extends hose life.

Warranty & Support

DEWALT backs this grease gun with a standard three-year limited warranty, and the 20V MAX battery gets its own separate warranty. If you have issues, I recommend calling DEWALT’s customer service directly rather than going through the seller — they have been responsive when I needed a replacement part. Check the warranty details on Amazon to confirm coverage for your specific unit.

My Final Verdict

The DEWALT Grease Gun 20V MAX, 10,000 PSI Variable 2-Speed Cordless Grease Gun delivers exactly what it promises — real 10,000 PSI power, 7 tubes per charge runtime, and a 9 oz per minute flow rate that makes quick work of heavy greasing jobs. I recommend it to anyone who maintains farm equipment, heavy machinery, or a fleet of vehicles regularly. If you only grease a lawn tractor twice a year, a lighter manual gun will save you money and arm fatigue.

The 16.7-pound weight is the biggest trade-off, but I still buy this gun for my shop because the power and battery life beat any cordless alternative I have tested. It is built for real work, not light garage duty.