Kubota D1803-T oil pressure switch

Austin3798

New member

Equipment
D-1803-T
Dec 5, 2023
1
0
1
Idaho
I have a Kubota serial number: 7MD6420 code number: 1J497-20000 and when it’s in park I can start it and increase/decrease RPM no problem oil pressure is fine but when I try to drive it in any RPM after a bit the oils pressure sensor will shut off the engine. I believe I am getting above 30 PSI in operation and I cleaned/checked the connection on the sensor every looks good. Is there any way to troubleshoot the oil pressure sensor measuring ohms are resistance?
 

GreensvilleJay

Well-known member

Equipment
BX23-S,57 A-C D-14,
Apr 2, 2019
13,098
5,774
113
Greensville,Ontario,Canada
IF this is a switch ( go -nogo ) oil pressure sensor
remove from engine, use air pressure to test.
Zero air pressure should give 'open' or infinite resistance or no beep
25-30 PSI 'closed', zero ohms, beeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeps

depending on age, sensor could have a ruptured diaphragm( rubber that keeps oil off switch contacts ). if that's the case,you can get random,weird, operations like shutdown.

curious , how do you KNOW it's the oil sensor causing the shut down ?
 
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North Idaho Wolfman

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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
Jun 9, 2013
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Sandpoint, ID
I have a Kubota serial number: 7MD6420 code number: 1J497-20000 and when it’s in park I can start it and increase/decrease RPM no problem oil pressure is fine but when I try to drive it in any RPM after a bit the oils pressure sensor will shut off the engine. I believe I am getting above 30 PSI in operation and I cleaned/checked the connection on the sensor every looks good. Is there any way to troubleshoot the oil pressure sensor measuring ohms are resistance?
What is the engine powering?
Kubota normally never put a low pressure cut off on their engines, so I'm wondering if it's an option to the equipment it's running.
 

GeoHorn

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May 18, 2018
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Texas
I have a Coleman PowerMate generator I use with the Airstream trailer when boondocking and it would randomly shut down. I got tired of troubleshooting it when it dawned on me it’s equipped with a low-oil-level shut-off system. I cut that wire and it’s been running reliably now for the last 4 years just fine.