Ran the numbers after last week's shift and my old Ellicott passed the 1,000 hour mark on the original cutterhead, which surprised me since we've been chewing through sandy clay near Baton Rouge, so has anyone else pushed a cutterhead past that point or am I just lucky?
I was running a job out by the Twin Falls irrigation canal last Tuesday and hit a patch of submerged logs and silt that just kept coming back no matter how many passes I made. My swing angle was 12 degrees and I was running at 1400 rpm, but the material was packing along the port side of the ladder. Took me about 45 minutes to realize the current was pushing everything into a narrow band about 30 feet wide, so I had to shift my anchor line and cut a shorter arc. Any of you deal with that kind of river flow messing with your cut depth? I usually run rivers in the fall, but this summer flow is a whole different animal. Wondering if I should drop to a 10 degree swing or just slow the pump speed next time.
Picked manual valves over the hydraulic setup last month on a job out near Baton Rouge, cost me an extra 20 minutes per cycle but the precision on the fine silt was worth it, anyone else run older rigs this way or am I overthinking the automation?
Ran a 20-inch dredge for two seasons and always swapped cutter teeth when they looked worn. Last spring a superintendent from Port Arthur watched me stop the swing and said I was burning money pulling them early. He showed me to measure the wear flats against the ring gauge, so now I get about 140 more hours per set. Has anyone else had a similar callout on maintenance timing that actually paid off?
I worked on the same stretch of the Mississippi River outside Baton Rouge for about 8 years. For the first 5 years we ran our 14-inch dredge pump at a fixed speed no matter what. The pipeline would surge and cavitate something fierce when we hit dense clay layers. Then in 2020 the company finally let me install a variable frequency drive on the main pump motor. The difference was night and day after just two weeks. We cut our diesel consumption by 18 percent and the pump wear dropped way down. The key was being able to ramp up slowly instead of slamming it full throttle. Has anyone else seen big changes like this after adding VFDs to older equipment?
I ran a small cutter dredge in a silted-up canal near Biloxi last spring, and the older guys kept telling me to crank the engine to max for tough spots. After three days of burning fuel and chewing through cutter teeth, the site foreman finally showed me that running at 70% throttle with constant swing actually cleared the channel faster. He had me time it side by side for an afternoon, and the slower pass beat the high RPM run by 9 minutes on a 50 foot section. Any of you guys found a similar speed trick that goes against the usual advice?
I was dealing with a worn cutterhead on my 12-inch dredge last Tuesday, chewing through way too much fuel for what we were pulling. Found a rebuild kit online for $120 and swapped it out in the yard before breakfast, and the next day we moved 30% more material with the same engine load. Anyone else ever gamble on a cheap rebuild kit and get lucky like that, or did I just dodge a bullet?
He said I was tossing muck back into the cut instead of clearing it. I slowed the swing speed down by 30% and the barge filled up way cleaner without all that rework. Anybody else get stuck in a rhythm that just seems efficient but really isn't?
We were dredging a tight spot near the old bridge pilings on the Chattahoochee and kept hitting rebar and scrap that wrapped around the teeth like Christmas tinsel, had to stop and clear it every 45 minutes for half a shift. Has anyone else dealt with a stretch of river that just seems cursed with buried debris?
I run a 12-inch dredge down in Port Arthur and last week I shifted the cutterhead angle from the standard 15 degrees to 10 to see if it would cut faster in that thick clay. Instead it kicked up a ton of silt that clogged my screen deck for three hours straight. Has anyone else messed with angle settings and run into a surprise like this?
I was swapping out a cutter head yesterday on the Mississippi job and this older operator, Mike, walked past and just said 'you're burning hours running it that slow, the sand's not gonna jump in the pipe'. He didn't even stop. I thought about it for the next 4 hours and he's right. I've been babying the swing speed to avoid cavitation but the production numbers have been flat. Any of you found a good way to balance cutter RPM against swing speed without burning out the pump?
He said just back off the suction 15% and let the material feed itself, and after trying it on the Mississippi River job last month I stopped plugging the intake every 20 minutes - has anyone else had to unlearn aggressive digging habits?
Everyone in our crew swears by hydraulic cutters for underwater vegetation, but on a job two months ago in the Galveston channel, the cutter kept clogging with silt and dead grass. I switched to a manual wire saw - the kind you use in pairs - and it cut through the roots way cleaner. Sure, it took me and a deckhand about 45 extra minutes per pass, but I didn't have to stop and unclog every 10 feet. The operator on the barge laughed at me until he saw the material pile up without needing a second pass. Has anyone else tried old-school tools over modern ones when the conditions get weird?
Back when I started on the Mississippi in '98, we didn't have those fancy digital depth readouts. Now my new rig has a screen telling me exactly where the cutter is... and I still catch myself reaching for the old manual lever out of habit. Anyone else find it hard to trust the tech after doing it by touch for 20 years?
Was running through a dense clay pocket down near the old barge channel and the pressure surge just popped a fitting at the elbow, had to shut down and patch it with a spare line I keep in the truck, anyone else deal with random blowouts on older rigs?
Guy had been on the job maybe 3 weeks. We were all waiting on a barge setup and he pipes up with that gem. Fast forward to lunchtime and his cutterhead was wrapped up in old netting and cable. Took a diver and half the shift to clear it. I just nodded at him when he walked past. Sometimes the best lesson is watching someone eat their own words.
I always thought you needed to crank down on those packing gland nuts to stop leaks. Then I was flipping through the manual for our 8 inch dredge pump last tuesday and saw it says 1/4 turn past hand tight is the spec. I tried it and the drip rate actually went down from like 20 drops a minute to maybe 5. Has anyone else found that following the book actually works better than old timer advice?
He said he just slaps new bearings in and runs it, meanwhile I spent 3 hours measuring clearances on a 30-year-old Ellicott and now I'm wondering if I'm wasting time on stuff that doesn't matter, has anyone else had a old-timer call them out like that?
Was working a job in Norfolk last summer, kept burning through bearings every 300 hours. Turns out the grease fitting was hidden under six inches of compacted muck.
I was running an old fishfinder on my rig near Galveston and kept missing the good spots. Dropped $900 on a side-scan unit with GPS mapping last month. First week out I found a buried sandbar that had 4 feet of pay gravel sitting on top of it. Pulled almost 2 ounces before the weekend was over. The old unit would have shown flat bottom there. Anyone else had a electronics upgrade change how you work the riverbed?
Back in 2012 I was green on a project near Houma, Louisiana. Muddy as hell, cutterhead kept clogging every 20 minutes. Old guy named Ray walked over, didn't say a word, just adjusted my swing speed and lowered the ladder angle by 3 degrees. Clogging stopped cold. He told me "slow down to speed up" and walked off. I've passed that line to three new guys since then. Anyone else have a piece of advice from a vet that just stuck with you forever?
I've been going back and forth on this since a job on the Mississippi last month. Running nonstop seemed to clear material faster but burned through 3 cutter teeth in a week, while shutting down gave the gearbox a break but added 2 hours of startup each morning to re-prime everything. What's your experience been with wear and tear vs. production time?
Was flipping through a 2024 USACE manual appendix last night and saw that even 0.5 G's of vibration can cut your swing bearing life by half, has anyone else's shop actually measured this stuff or do we all just run till she rattles?
I finally switched from running pump gas with cheap oil to a 50:1 synthetic mix on my 8-inch dredge. Before, I was replacing cutter teeth every 200 hours on the Klamath River. Now I'm at 400 hours and they still look barely worn. What's everyone else using for their mix ratios?