Honestly I was working on a job down near the Port of Baltimore last month and watched three different ops fire up their dredge pumps with no prime. Ngl it makes me cringe every time because that's how you cook a seal in under 30 seconds. I always run a pre-lube cycle for at least 2 minutes before I even think about engaging the pump. Has anyone else had to replace a pump seal after a rookie mistake like that?
For years I figured rock guards were just extra weight that slowed us down. I ran a dredge on the Mississippi near Baton Rouge for about 6 years and never bothered with them. Then last spring we hit this patch of buried riprap from an old levee job. The cutter head got chewed up so bad we had to pull it and spend 18 hours swapping teeth and repairing the hub. My buddy who runs a barge up on the Missouri River kept telling me to use them but I blew him off. After that repair bill hit like $4,200 I finally ordered a set. Now I swear by them and I feel like an idiot for ignoring the advice for so long. Has anyone else gotten burned by skipping something simple then seeing the difference firsthand?
I was working a job on the Mississippi back in 2017, clearing a clog near a bend by Baton Rouge. The cutterhead grabbed a submerged log and it slammed sideways into the pump housing. I shut down immediately but the damage was done, the seal was blown and we lost about 30 minutes of prime. Had to call the shop and wait 4 hours for a replacement, plus we ended up running an extra shift the next day to catch up. Anyone else ever had debris come out of nowhere and wreck your equipment mid operation?
A guy on a pipeline job near Red Deer ran 30,000 hours on the same motor with Rotella T6, showed me the oil analysis reports to prove it. Ever had a piece of hard data flip your opinion on something you were sure about?
Had a job in a tight canal near Baton Rouge where my usual bucket was getting pinched. Swapped to the clamshell thinking Id grab more material. Ended up fighting mud and debris all day. The clamshell just couldnt close clean on the mixed bottom. Lost about 30% of my cycle time. Anyone else try one of these on silty jobs and have better luck?
I had a 12 inch dredge pump start leaking bad on Thursday morning. Figured I'd swap the seal and be back running by noon. Six hours later I was still fighting with the old seal that had basically fused itself to the shaft. Ended up having to cut it off with a grinder and then clean the shaft with sandpaper for another hour. Has anyone else had a seal job turn into a full day project?
Thought it would save fuel and reduce wear, but it actually packed the suction line solid in about 20 minutes. Anyone else ever mess with running speeds and get burned by the mud?
I used to run a cable-operated 8-inch dredge in Mobile Bay for 6 years, and I thought that was just how it had to be. Two weeks ago I finally swapped over to a hydraulic setup on a job near the ship channel, and I'm kicking myself for waiting so long. The control is way smoother and I didn't have to wrestle with lines getting snagged every 20 minutes. Has anyone else made this switch and found a specific brand of pump that holds up longer?
I always figured those cheap vibration meters were junk compared to the expensive ones the big crews use. Been running a 12-inch dredge on the Mississippi River near Baton Rouge for about 8 years. Last month I clamped one on just to see and it showed a spike at 3.4 Hz on the port side bearing. Pulled the bearing cover and found a crack starting in the race. If I'd run that cutterhead another week it would have seized up mid-job. Has anyone else caught a hidden problem with a cheap sensor like this?
I was skeptical because I figured a ripper head would just chew through more wear parts but after three days of hitting boulders the old school operator I shadowed showed me how it broke up hard material faster and saved me two full shifts of clearing jams. Has anyone else seen that big a difference swapping cutterheads on tough ground?
Summer of 2019 I was working a stretch near Baton Rouge clearing out silt build up around a bridge pier. The dredge was running fine all morning but around 2 PM I heard the engine start lugging down. I shut everything off and pulled the ladder up to find a steel cable wrapped tight around the cutterhead. It looked like an old mooring line from a barge that sank who knows when. Took me and another guy 4 hours with a torch and a grinder to cut it free piece by piece. Lost almost a whole shift of production over it. I still check the sonar way more carefully before I drop the ladder on any new site. Any of you guys run into random junk like that?
I was running a 12 inch dredge up in Green Bay last week pulling heavy clay and sand mix and my cutter bar kept packing up every 20 minutes. I was stopping to clear it constantly and losing so much time. Turns out I had the suction too high for that material type, I was pulling harder than I needed to. Dropped the RPMs by about 15% and adjusted the ladder angle down a couple degrees and it ran smooth for the rest of the 8 hour shift. Anyone else find that adjusting speed makes a bigger difference than the cutter teeth setup in certain soils?
Was at a yard sale last weekend and some kid was selling an old dredge part. He called the swing valve a 'vibe control' and said it helped 'regulate the flow energy'. Made me laugh at first. But it got me thinking about how we used to just learn from old timers without all the fancy names. My first job in 2008 I didnt even know what a swing valve was, I just turned the wheel when the foreman yelled. Has anyone else noticed the language shift on job sites over the last 15 years?
I spent two full shifts running a plain suction dredge through a clay bottom on the Mississippi near Baton Rouge last month. Barely moved 15 cubic yards in 8 hours. Switched to a cutterhead suction setup the next day and pulled 80 yards easy. Same crew, same water, same clay. The cutterhead just chewed through it while the plain suction clogged every 20 minutes. Has anyone else seen that big a difference switching methods on sticky material?
We were clearing a clog near the intake pipe and the suction just died on us around 2pm. Spent 4 hours pulling mud and debris by hand because the pump was shot. Found an old tire and what looked like a shredded dock line wrapped around the impeller. Has anyone else had a pump fail like that mid-job and had to finish with hand tools?
I had a cutter head jam up on a sunken log down in the Mobile River last Wednesday, and I stopped everything to clear it out, but my coworker says he would've just run it harder to break it loose. Which way do you go when something grabs your suction?
A mechanic in Baton Rouge watched me work for 5 minutes then asked if I ever wondered why my slurry lines kept clogging, and I felt like a total idiot. Has anyone else missed something this basic for that long?
He cut through a tight piling cluster in half the time and had way less hand fatigue after a 10-hour day. Have you guys tried downsizing your wheel for tight spots?
I thought I was saving money buying a used chain from a guy on Craigslist but it was so stretched it chewed up my pump seals in 3 hours. Has anyone else had luck with aftermarket chains or should I just stick with OEM?
Was reading a maintenance log from the previous shift and noticed a chart I'd never seen before. Turns out my teeth were wearing uneven because of a 2 degree misalignment. Has anyone else discovered a simple fix like this and felt stupid for not catching it sooner?
I was working a pond near Baton Rouge last month and the cutterhead kept gumming up every 20 minutes. Stopping to clean it out was killing my timeline. Turns out I had the suction too high and it was pulling in pure mud instead of letting water thin it out. I backed off the pump speed by about 15% and it ran smooth for the rest of the shift. Anyone else had to dial back suction on heavy muck jobs?
Was doing a routine changeout on the cutterhead last week and my supplier in Baton Rouge asked what size I was running. Told him 4 inch and he just shook his head, said this model takes 3.5 inch. All that extra wear on the bearings and reduced production rate, and I never even checked the manual. Been running this job since March. Anyone else realize they were running mismatched parts way longer than they should have?
I was pumping sand on a pipeline job and a thin layer of clay slit got past the cutterhead and packed the suction line solid. Took me almost 6 hours to clear it with backflush and a rod. Has anyone rigged up a simple screen or grate at the intake to stop this kind of stuff?
Ran into a retired guy at the fuel dock in Port Arthur last week. He noticed I wasn't flushing my suction hose after every shift and told me he had a hose burst on him back in '89 that put a job 3 days behind. Said it was just sand buildup eating through from the inside. I always thought it was fine to do it weekly. Now I'm flushing after every pull. Has anyone else had a hose fail on them from not cleaning it enough?