1693TA
Senior Member
This is not a new problem out of that rebuild plant. It is ongoing and not all the plant's problem. Cat is not the easiest to deal with in remanufacturing criteria.
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Cat 963c problems help
- Thread starter Jlb84
- Start date
Jlb84
Member
Well still in the shop engineer flew in today said it needs a new drive motor which has already been replaced with a 6 month warranty that went out sitting in there shop. Said the software has a problem with the new drive pumps in the transition period from low speed with the pumps to high speed with the motors that this is old technology there dealing with and basically my machine will b operational but not like it was before.
Tags
Senior Member
Unfortunately, it sounds like you need a good lawyer…or a better Cat dealer…
Did you ask the dealer about my points made earlier in post #27?
sawmilleng
Well-Known Member
This story highlights an uncomfortable truth about "new, modern machinery". It may work like a hot dam while it is new, but get a bit of crap in the lifeblood (hydraulic oil) or have an electronic box blow its brains out and you are hooped. That 963 basically consists of 6 parts: diesel engine, 2 pumps, 2 track drive hydraulic motors and the hydraulics brain box. Engines can still be rebuilt properly almost anywhere. Hydraulics and the brain boxes are a different animal. And you are beholden to those that can fix the stuff.
The replacement hydraulic parts are pricey and don't lend themselves well to the small guy fixing them. A transmission (for example) can be pulled out and rebuilt by almost anyone but a hydraulic pump or motor takes a lot more tech (and $) to get it right. Bend over a barrel...
Mudober said it right (#42, above)--stick with the older tech (at least for the small guy or the farmer)
When repairs run to significant % of the machines first cost, the machine better be operating a very high % of its available time all year long to offset the repair cost. That may be a point that many smaller contractors don't realize.
I'm one of those small guys- I finally pulled the trigger on an older Hyundai 290LC3 some time back for the farm. I was crappin bricks about the hydraulics. But the contractor that had it was planning on keeping it and changed out the main pumps and swing motor before he decided to retire and sold it to the guy that I got it from. I have a weak track motor but I hope I can live with that by concentrating on keeping the hydraulic oil clean and watching the contaminants in the oil and bypass drain oil flows.
I have been poking around, looking for a 955-sized machine, but in seeing this thread I sure won't be looking at any of the iron that uses 100% hydraulics to drive.
And when the dealer can't get the repairs right, as Tags says, "get a good lawyer".
Jon.
The replacement hydraulic parts are pricey and don't lend themselves well to the small guy fixing them. A transmission (for example) can be pulled out and rebuilt by almost anyone but a hydraulic pump or motor takes a lot more tech (and $) to get it right. Bend over a barrel...
Mudober said it right (#42, above)--stick with the older tech (at least for the small guy or the farmer)
When repairs run to significant % of the machines first cost, the machine better be operating a very high % of its available time all year long to offset the repair cost. That may be a point that many smaller contractors don't realize.
I'm one of those small guys- I finally pulled the trigger on an older Hyundai 290LC3 some time back for the farm. I was crappin bricks about the hydraulics. But the contractor that had it was planning on keeping it and changed out the main pumps and swing motor before he decided to retire and sold it to the guy that I got it from. I have a weak track motor but I hope I can live with that by concentrating on keeping the hydraulic oil clean and watching the contaminants in the oil and bypass drain oil flows.
I have been poking around, looking for a 955-sized machine, but in seeing this thread I sure won't be looking at any of the iron that uses 100% hydraulics to drive.
And when the dealer can't get the repairs right, as Tags says, "get a good lawyer".
Jon.
Jlb84
Member
Yes sir I did and they said yeah we’ve done been through that!
Welder Dave
Senior Member
I'd be wondering if they just said that to not look dumb in front of you.
Well if they did swap the pump controllers from the old pumps to the reman pumps, I don't see any reason why the ECM shouldn't play nicely with the hydraulics. That's why I would be interested to see a photo of the reman pumps installed.
Essentially, all the ECM is doing is modulating signal pressure to both the pump and motor controllers at the same time. When the pump controller is getting enough signal pressure to fully upstroke the pump, the motors take over using the same signal pressure to start to destroke the motors. In other words, the machine speed is mainly down to hydraulics. To be laying blame on the ECM isn't right, IMO.
