I seem to have a lot of problems with pressure sensors on my 2004 New Holland TS135A tractor with about 2000 hours. I have had the red "STOP" light come on three times this summer and it costs us precious harvest time. Minor part cost but big time production cost. The sensors are hydraulic lube oil pressure sensor and two times on the "main hydraulic filter suction pressure". The last time I had pressure tested with guage and it never went below 40 psi while switch is tripped at pressures below 8-12 psi. No part available for 5 days so I am operating bypassed. Anyone else having similar type sensor problems?