Desk Jockey
Member
That was a good purchase! This while troubling should be an easy fix and she will be reliable again.
Prochem 405
- Thread starter SamIam
- Start date
Lee Stockwell
FOJL
J
JS41035
Guest
Fantastic advice. You can rebuild everything for a couple hundred. (New hose ,check valves , flow meter chem pump) and just be done with it.
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J
JS41035
Guest
Does it continue running rough even if you hold the override switch to the left?
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SamIam
Member
I'll check
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J
JS41035
Guest
If it does it is fuel or ignition. The over ride should bypass the oil and engine temp kill switchs. The high temp kill switch on the back of the ex heat exchanger is worthless and should be removed
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SamIam
Member
It actually never shuts down it sputters like its fuel starved opening the choke allows gas to poor strait to engine and runs fine. It could be the fuel pump. I just replaced one pre maturely so I will through that one on and test.
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SamIam
Member
Started machine with new fuel pump seems like it running better will know tomorrow after full day.
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Sent from my iPad using Tapatalk HD
SamIam
Member
New fuel pump seemed to help then it started doing it again doah
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Vincent Feehan
Member
Carb has crap in the jets I bet, its fuel related. I have 6300 hours on my 405 carb, never touched it. Its not the fuel pump, they work or don't. I have the same fuel pump too. Good luck
rwcarpet
Supportive Member
Sam....one more thing to check. Look for vacuum leaks around the engine. If you pulled or popped a vacuum engine hose off, it will have those same symtoms. If it runs with the choke full out, it just might be a loose or broken vac line, especially around the carb. Had that on the Genny one day......had a backfire, it popped a vacuum cap off the intake manifold, and would not run without choke full out.
Just an idea to check.
Lee Stockwell
FOJL
If it ran better with the new fuel pump, even for an hour or so, it's the fuel pump.
The fuel pump ALSO has a filter, on its inlet side. If it is picking up trash from the bottom of the truck's tank, that filter is the first line of defense.
Easy to check.
The hardest glitch to troubleshoot is when multiple things go wrong at once.
GeneMiller
Member
Take off the air filter and look inside the carburetor. Stop guessing and look at whats really going on. What's it doing. Gas coming intermittent or still flowing. Is the air filter clean.
Gene
Gene
SamIam
Member
The three way was leaking so the chemical flow was sporadic tightened it up and it works again.
My tech in my 2nd truck did 2 rentals yesterday got to 3rd job couldn't get it to start
Checked everything drained machine turned machine around checked radiator fluid checked my wire by pass of broken float.
Drove 35 miles to tech to check thought it might be a low pressure switch.
Nope the 175 hit the brass connection on the water softener no water in the machine got the float fixed they had to reset 1 job.
If was there I would have spotted that I just thought that was to simple.
My tech said he's seen guys roll in with full dump tanks! My machine wont start.
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My tech in my 2nd truck did 2 rentals yesterday got to 3rd job couldn't get it to start
Checked everything drained machine turned machine around checked radiator fluid checked my wire by pass of broken float.
Drove 35 miles to tech to check thought it might be a low pressure switch.
Nope the 175 hit the brass connection on the water softener no water in the machine got the float fixed they had to reset 1 job.
If was there I would have spotted that I just thought that was to simple.
My tech said he's seen guys roll in with full dump tanks! My machine wont start.
Sent from my iPad using Tapatalk HD
GeneMiller
Member
Add a little red light to the float wiring and put it on the panel. When its up its on.
Gene
Gene
SamIam
Member
Why are chemical pumps so hard to open??? You need a vise a mallet a breaker bar or 2 foot wrench. Then lean on it with all your weight.
I'm pretty sure I it's the diaphragm causing my issues with chemical flow replacing check valves to.
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I'm pretty sure I it's the diaphragm causing my issues with chemical flow replacing check valves to.
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Vincent Feehan
Member
When you get it apart, use antisieze when you put it back together
GeneMiller
Member
Yes with the anti seize and be careful because they get their threads ruined in a second. It shouldn't be that tight.
Gene
SamIam
Member
Its a stainless steel one had a guy from church with a air compressor and a hammer jack used a adjustable on the ground stepped on it and like the thing they use to take tires off he just hit it once came right apart.
Rebuilt it put back together and it works like new. Primes without drawing from the vacuum and adjusts up to 10 flow on the meter again.
Also the other machine hasn't had a problem since that first time in the morning only no sputtering for almost a week.
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Rebuilt it put back together and it works like new. Primes without drawing from the vacuum and adjusts up to 10 flow on the meter again.
Also the other machine hasn't had a problem since that first time in the morning only no sputtering for almost a week.
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Vincent Feehan
Member
Has to be hot outside to act up I bet, run a blower while working. Really helps keep the carb cool. I am sure its weather related
