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Big Diesel
10-28-2012, 09:07 PM
Post: #21
RE: Big Diesel
Well, the boss is 85 with a hearing aid in each ear. I am 49 & I do wear my hearing protection at all times in a machine.

I have a terrible time listening to the dialog in a movie, understanding the lyrics to songs on the radio & I can't understand a person 2 feet away if there is any other noise around me. Yet I can hear an air leak on the loader a hundred feet away or a miss in a dozer engine at over a hundred yards???

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Garner

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10-28-2012, 11:16 PM
Post: #22
RE: Big Diesel
Sounds familiar... and yet the ability to pick up on certain things is like a mother at a playground who can single out their kid crying with 50 other kids making noise.
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11-03-2012, 09:21 AM
Post: #23
RE: Big Diesel
Well, Hurricane Sandy completely spared my area of what was "Supposed" to happen. We did get enough rain out if it to turn our backfill into mud that won't support our equipment. So I won't have any new information on the oil pressure problem until we dry out a little.

My heart goes out to those that weren't spared the power of this storm. One of our own administrators; Rupe, took a real hit from Sandy. I hope that your lives return to somewhat normal soon.

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Garner

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11-03-2012, 10:15 AM
Post: #24
RE: Big Diesel
My area took the hit. The only damage on my property is a cracked bird bath and a cold hot tub. (due to the power outage) Guess I am lucky in that respect!
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04-14-2013, 10:24 AM
Post: #25
RE: Big Diesel
Just wandering around the board on a quiet Sunday morning and I see we left this thread hanging. Anything new to report?
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04-14-2013, 07:49 PM
Post: #26
RE: Big Diesel
Well, you ain’t a gonna’ believe this one. The boss was tired of spending money trying to figure out what was wrong. He told the mechanics to pull the engine out of the spare dozer and stick it in the one that we were using. It took quite a while but they got the job done and the boss asked me to run it again. I fired it up and the pressure was at around 65 cold idle, that’s about normal. I pushed about 2 blades of dirt and the gauge fell to around 45 wide open, also normal. Then I stepped on the decelerator, came to an idle & the gauge fell to zero. (this is becoming normal on this dozer) I took it back down to the mechanic and he installed the shop gauge with a long length of hose and some zip ties so I could see it from the cab. That gauge shows 45 full throttle & 12 idle. The shop gauge has now become a permanent fixture. We have been running the dozer for months with the shop gauge zip tied to the hand rail. The mechanics swear up & down that they tried the same thing on the other engine and it fell to zero. I never seen that so I can’t confirm or deny it???

I looked at the only thing left that I could think of. The line from the filter housing to the gauge in the dash. What a mess! It is a cobble of steel line, rubber hose with hose clamps, copper tubing, more rubber and clamps… I would guess that a small piece of the rubber was swelling up as the oil warmed to a point that it stopped the pressure at an idle. I think that is why the shop gauge is still on it. When the boss finds out that they changed a motor instead of 3 feet of oil line someone is in for a serious lecture??? No, they won’t get fired. My boss is one like you have never met before. That’s also why nothing ever gets fixed.

If I get a chance I will change the line and hook the dash gauge back up myself. It may be a while but I’ll let you know if that was the problem.

Thanks for catching this loose end.

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Garner

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04-14-2013, 07:59 PM
Post: #27
RE: Big Diesel
Interesting to say the least!

BTW, it might be worth your while to spend $10 for a new shop gauge and compare notes. Of course that doesn't tell us why the thing spun a bearing or why the oil drive was breaking..... UNLESS..... there's an external line clog say between the oil pump and where the guage takes it's reading from. (remote mounted oil filter?) IOW, a solid hydro-lock due to a clog someplace just might break the oil drive due to overloading and also cause a lack of lubrication somewhere else if it's not circulating properly. Just food for thought.
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04-14-2013, 09:55 PM
Post: #28
RE: Big Diesel
I completely agree with trying another shop gauge. I don’t think that is the problem since all of the dash gauges are also just a manual gauge, but I still like the idea of covering all the bases with the least expensive means.

I would guess that the bearing spun due to lack of oil. The lack of oil was due to the oil pump drive shaft breaking. The second shaft that broke was a used one. And broken pump shafts are a common, known weak spot on these engines.

The main filters on the engine are not remote. Everything is bolted to the engine and ported. There are two relief valves built into the filter mounting base.

Although all of that is very good food for thought, I still think that cobbled up line to the gauge will turn out to be the problem. Everything else; including the filter mounting base & relief valves, were changed along with the engine. The line to the gauge in the dash is the only thing that wasn’t changed with the engine. And when a completely different engine does the exact same thing on the gauge I just can’t see it being anything with the engine. Another thing is that I ran the old dozer that gave it’s life to save the newer one only a couple of weeks before it’s demise. It was carrying good oil pressure at that time.

There is one remote filter on the machine. It is supposed to be just a by-pass filter. These engines had the old “Lube-R-Finer” filters on them. They were replaced with the update “Spin-on” filters & they do have rubber lines going to them. I don’t know if they could cause a hydro-lock or not. I also think that the filter came along with the replacement engine as they are bolted to the block. They could have used the old hoses though???

Still, thinking of everything, the only thing that changed the pressure reading was eliminating that cobbled up line to the dash gauge. My money keeps going back there. But; as I’ve said a dozen times now, I really appreciate hearing all of the possibilities! Just because my mind gets stuck on one thing doesn’t mean that I won’t check everything to make sure.

Thanks for all of the insight!!!

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Garner

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04-15-2013, 12:00 AM
Post: #29
RE: Big Diesel
So, you are telling me these guys didn't verify the pressure with a shop gauge when you first reported the low oil pressure? Did I get that right?
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04-15-2013, 06:13 AM
Post: #30
RE: Big Diesel
They swear up & down that they did, but look at the overwhelming evidence. We have put over a hundred hours on this engine with that shop gauge zip tied to the had rail. In all of that time the pressure has held the same & the engine runs smooth & quiet. I just can’t help but to think that something is fishy. I never got to run it with the original engine and the shop gauge. The mechanics “claim” that they did??? My only other option here would be to believe that they did & either the gauge malfunctioned or they read it wrong???

You just gave me another idea. The original line & gauge are still on the dozer. If I get back on that machine; I’m on a different job right now, I could just hook up the original gauge again and see what happens. If it falls to zero at idle I could then replace that cobbled line and try it again. That would pretty much cover all the bases, wouldn’t it?

You see; when one of the mechanics is the son of one of the owner’s, you have to be Sherlock Holmes to get to the truth of any screw up.

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Garner

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