JCB 214 Transmission Oil Pressure...

I have a JCB 214 Series 3 backhoe with 1775 hrs. on it. I bought it last fall, did a full service, changed all filters and fluids, including the transmission. Replaced the oil and filter with factory JCB equipment. I put about 90 hrs. on the backhoe with no problem, then the transmission oil pressure light started to come on at an idle about 700 rpm. Changed the trans filter again and no difference.

The light goes out about 1100 - 1200 rpm and operates fine above that rpm range, but...

JCB 214 Transmission Oil Pressure...

JCB 214 Transmission Oil Pressure...