My JCB 3C mk111 Powertrain Build 5, now needs its ATF fluid topping up every time I use it.

Don Cook · Post #1 by **Don Cook** » Thu May 07, 2020 12:30 pm

My JCB 3C mk111 Powertrain Build 5, now needs its ATF fluid topping up every time I use it. I can’t see an oil leak, so where is it going? When I bought it years ago, I was told to run the engine for a few minutes then check the oil, it has always been fine till just recently.

essexpete · Post #2 by **essexpete** » Thu May 07, 2020 9:19 pm

Run at fast idle for a few minutes then either dip whilst running or immediately on stop.
Does not take much to move a level on the dip stick. Don't overfill as it will blow out of the filler at best.

Don Cook · Post #3 by **Don Cook** » Thu May 07, 2020 9:44 pm

Could it be that the filter is blocked? I was thinking of changing it.

essexpete · Post #4 by **essexpete** » Thu May 07, 2020 11:16 pm

I might be wrong but I think the filter would by pass if blocked. It would not explain where the oil is going.

Don Cook · Post #5 by **Don Cook** » Fri May 08, 2020 8:04 pm

I was just wondering if it was backing up when running, so giving a false reading.

essexpete · Post #6 by **essexpete** » Sat May 09, 2020 12:27 am

Well it could not hurt to eliminate the filter. If the transmission was leaking you should see it somewhere. As far as I can remember the gear box is not sealed to the shuttle but I guess you could check the gearbox level.
If the converter end was leaking I would think oil would be seen coming out of the bell housing.

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