- This topic has 16 replies, 4 voices, and was last updated 9 years, 4 months ago by
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Hello,
We have a Jinma 164Y with Changchai 3M78.
The problem is that after about 25 hours of operation hydraulic pump started to partially suck oil from engine instead from its dedicated sump (the gearbox and hydraulics use same oil). It pulls oil from engine until it overfills the hydraulic oil sump and oil starts to exit breather on top of gearbox/hydraulic sump,leaving engine without oil.
We removed the pump and it had a considerable ammount of play for new pump. We ordered a new pump, filter, sealings, oil and changed everything.
But there was no help and pump sucks all engine oil in 30 minuttes or so of operation. There is no restriction in oil flow lines but anyway pump sucks slowly engine oil also.
We tried to speak to manufacturer but they only said “replace cylinder liners, pistons and piston rings to make engine not spend many oil” , its like they dont read or dont understand the problems.
Speaking with other mechanics they sayonly faults they had was hydraulic pumps pushing hydraulic oil into engine, but never pull oil from engine.
Help ?
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We had this exact problem with a 164 that we had about a year ago!!! If you call monday and talk to George he will be able to tell you exactly what is wrong with your tractor. Hope to hear from you!!
Trevor Nystrom
Keno Tractors
Parts Department
541-850-8193
866-363-8193
Tyler Nystrom
Keno Tractors
parts@kenotractors.com
866-363-8193
Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST -
I remember a fellow in Europe somewhere having that problem a few years ago, something to do with a pipe from a sump causing the problem. (The angle or the routing causing suction from the engine). Wished I saved it as this seems to come up at least once a year, but we don't see these imported into the US. His was also on a new or almost new unit.
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Hello,
me and my brother buy one each. Mine is perfect but i spent probably 250 hours on it (replaced all Chinese screws with chrome allen screws, installed racing stainless steel exhaust pipe :), led ligts front and back, 10 BAR air compressor, air suspension seat, seat heating…. and many more)
My brother does not spend somuch attention on his tractor but we cant seem to solve this problem
Keno tractors, can you write me solution im from Croatia, quite different time zone and English is not my language, i would have hard time to speak to your mechanic?
Tinbender, please let me Know if you remember, we are really desperate to solve this problem
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The problem is your hydraulic pump. The seals go out in it and let hydraulic fluid into the engine. At least that was the problem when we had this issue, and i would be fairly certain that you've got the same issue going on.
Trevor Nystrom
Keno Tractors
Parts Department
541-850-8193
866-363-8193
Tyler Nystrom
Keno Tractors
parts@kenotractors.com
866-363-8193
Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST -
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Yes i saw that, but that's really the only place in the tractor where they hydraulics and engine oil have anything to do with each other? That's why i would tend to think that its the pump. Unless you've got a seal out, but then i would think that you would see the oil in the clutch housing.
Tyler Nystrom
Keno Tractors
parts@kenotractors.com
866-363-8193
Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST -
I know it's bizarre but I clearly remember parts of a post from a fellow in Germany, I think that had this same problem, and he traced it down to a pipe that I believe came from the sump to the transmission if I recall, that was causing the pump to draw oil from the engine. Creating a vacuum? I wish I could find that thread again, but I honestly can't remember how long it's been, and this site has been torn up, thrown away, and rebuilt several times with older posts getting lost. Hacklordsniper, are there any sites like this in Europe, or dealers with good mechanics? The problem is we don't get Jinma tractors here in the US with common sumps, you folks do.
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Hello,
yes, the problem is the pump is sucking oil from engine slowly. The seal and pump are not a problem since we replaced both and installed new, we also replaced seal then checked whole hydraulic system, replaced oil, filter… My pump is not pushing the hydraulic fluid to the engine, but reverse
Even experienced mechanics dont Know what to do anymore.
Tinbender are you speaking about some internal pipe? Because there is no pipes between hydraulic sump and gearbox, the gearbox is the sump
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I don't recall the exact model of the tractor this fellow had ( I think it started with a 2) but I remember it had a tank under the seat with a line down to the transmission, I just can't remember the particulars. I'm thinking now that this thread was from around 2010 or so. After being temporarily deceased back in 2012 my memory, along with everything else isn't what it used to be.
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I talked to my mechanic more…. and he still thinks that it is the pump also. I really don't see much else that it could be. That is really the only tractor that came with one fluid for the tranny and hydraulic fluids. Also the only tractor we have had this problem with so far, and both times it was the pump. Also, he did say that one of the times we had this happen it was sucking engine oil and overfilling the hydraulics out the vent tube… Id do some more checking on that.
Trevor Nystrom
Keno Tractors
Parts Department
541-850-8193
866-363-8193
Tyler Nystrom
Keno Tractors
parts@kenotractors.com
866-363-8193
Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST -
Hello Keno tractors,
that was the first think that we tought is the problem, but 2 new pumps later and 3 new seals the problem is all time present.
We checked every detail in hydraulic system, there is nothing wrong. The pump is using its dedicated oil but also slowly pulls engine oil into it too. Dont even understand how is easier for pump to pull engine oil trough seal and not its dedicated oil…
The new assumption is that pump mounting in block is not machined well and the pump axle is spun in wobbly motion and destroying the pump close tolerances.
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