Tach quit-oil pressure gauge flickers

[lakespirit]

The hour meter is tach driven. No tach - no hour meter. I looked at the wiring behind our cluster, there's only one common ground wire for the whole unit (not counting the ammeter ground). So the flickering oil gauge is almost certainly a separate problem.

But let's clear something up first. When I see the word "flicker" I think of a light. And there is a LOW OIL idiot light in that cluster (far left, bottom). Is it that light that's flickering? or is it actually the needle on the oil pressure gauge that jumping around?

//greg//

Needle.

 

[greg_g]

OK, then you've got two problems - but it's strange that they'd both occur simultaneously. Or was one problem ongoing, then the other started? Anyway, for the tach-hour meter problem, clean and reseat the two wire connector down at the sending unit. It's screwed into the bellhousing. If that doesn't do it, the sending unit itself may have come loose and is starting to back out.

Same thing for the OPSU (oil pressure sending unit).

//greg//

 

[lakespirit]

OK, then you've got two problems - but it's strange that they'd both occur simultaneously. Or was one problem ongoing, then the other started? Anyway, for the tach-hour meter problem, clean and reseat the two wire connector down at the sending unit. It's screwed into the bellhousing. If that doesn't do it, the sending unit itself may have come loose and is starting to back out.

Same thing for the OPSU (oil pressure sending unit).

//greg//

So far everything I have tried has resullted in no change. Any ther thoughts?

 

[greg_g]

So far everything I have tried has resullted in no change. Any ther thoughts?

Consult an auto-electric guy?

//greg//

 

[Affordable]

I would say the oil pressure flickering is the sending unit, the tach not working is in the sending unit ,ground wire, or cluster.I have said this several times before The hour meter does NOT work from a pulse from the sending unit, It is wired thru the electrical and if the key is left on it will rack up hours.
It may not have been that way on yours Greg G,but I have sold alot of Jinma tractors and they all have been the same

Tommy
Affordable Tractor Sales
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[greg_g]

I have said this several times before The hour meter does NOT work from a pulse from the sending unit, It is wired thru the electrical and if the key is left on it will rack up hours.
It may not have been that way on yours Greg G,but I have sold alot of Jinma tractors and they all have been the same

And if you've said it about a KAMA or a TaiShan, you've been wrong several times before Tommy. They don't use the same cluster gauge as does Jinma. I guarantee to you that the tach (not the tach sender) triggers the hour meter on LakeSpirit's TS254. No hours rack up until the tach is registering RPMs.

While I'm at it, not long ago another Jinma owner offered evidence that his OPSU triggered his hour meter.

//greg//

 

[Affordable]

GregG,I have only sold about 300 Jinma tractors so I don't have the knowledge that you do about how they work yet and I'm not sure about the Kamas but I will find out from Chip,I'm not perfect by any means and I can't tell you how many .mm a nats legs will spread but I know on the Jinma tractors the tach is powered by 12V source and will continue to rack up hours if the key is left on,

Tommy
Affordable Tractor Sales

 

[greg_g]

GregG,I have only sold about 300 Jinma tractors so I don't have the knowledge that you do about how they work yet and I'm not sure about the Kamas but I will find out from Chip,I'm not perfect by any means and I can't tell you how many .mm a nats legs will spread but I know on the Jinma tractors the tach is powered by 12V source and will continue to rack up hours if the key is left on,

Tommy
Affordable Tractor Sales

I have no desire to be confrontational here Tommy. But this is a thread about a TaiShan issue. Go back and read everything you've posted to this thread so far, and see if you still think that experience gathered from selling 300 Jinmas is germane to a Kama/TaiShan OPSU-tach-hour meter issue.

Here are front and rear photos: note first that the KAMA/TaiShan face and physical dimensions are different. But note more importantly that there are three electrical connectors. Then look at the photo of the PCB on the back. The yellow wire with the green stripe behind the center circle (5 o'clock position) is the tach feed. There is no independent hour counter wire. When the tach is registering RPMs, the hour meter is counting. And it's not a simple on/run - off/quit counter either. An internal logic chip makes the hour meter count faster or slower - relative to how many RPMs are registering. Up at PTO speeds, the hour meter is counting 1:1. Below that, it racks up time slower.

//greg//

 

[Affordable]

That is the same panel installed on the Jinmas Greg ??????????They have since changed them again


Tommy
Affordable Tractor Sales

 

[greg_g]

That is the same panel installed on the Jinmas Greg ??????????They have since changed them again

OK Tommy, you obviously don't believe a guy who actually owns/operates/maintains a KAMA and a TaiShan. And assuming you're unfamiliar with the line, LakeSpirit's TS254 is basically the same as my TS354C - it just has a smaller engine (Y385 versus Y485).

But if you must, go ahead and get your independent confirmation from Chip. I'm here to tellya that neither of my hour meters count simply because the keyswitch is in the ON position. The key has to be ON, the engine has to be running, and the speed at which the hour meter turns over is proportional to the number of RPMs the tach is registering.

That is; when the engine is at idle, the hour meter ticks off at a rate considerably less than 1:1 (less than one meter minute for every real minute). The more RPMs indicated on the tach, the faster the hour meter turns. At PTO rpms, the hour meter is clicking off 1 minute every 60 seconds (1:1)

And I guess I've been at this longer than it's taken you to sell those 300 Jinmas. Because the older Jinmas (pre-cluster gauge) had no tach at all. The OPSU ran both the oil pressure gauge (wire #27) AND triggered the hour meter (wire #26). No oil pressure, no hours counting off.

//greg//