Rebuilt 250 has maxed out oil pressure

[5_TON_TOMATOE]

Just completed rebuild, in frame kit of the 818. Now it maxes out the pressure on the gauge. Any thoughts on this? Thanks

 

[simp5782]

Just completed rebuild, in frame kit of the 818. Now it maxes out the pressure on the gauge. Any thoughts on this? Thanks

Manual gauge or electric? Verify with a mechanical gauge. Electric could be all over

Or use a meter and see how many ohms the sender unit has while it is running generally 1ohm per psi

 

[5_TON_TOMATOE]

Manual gauge or electric? Verify with a mechanical gauge. Electric could be all over

Or use a meter and see how many ohms the sender unit has while it is running generally 1ohm per psi

She's a 1970- Did they have electric? I assumed mechanical

 

[EO2NMCB]

Unless it’s been modified the M809 series trucks have a mechanical gauge.

 

[Ajax MD]

Mine is mechanical. It's a '71.

 

[WillWagner]

Put a known good gauge in one of the ports. Verify against the dash gauge. No troubleshooting for high OP per Cummins, but, a stuck regulator will cause it. Did your failure put debris into the oil pan? If so, godd possibility debris in the regulator.

 

[5_TON_TOMATOE]

Put a known good gauge in one of the ports. Verify against the dash gauge. No troubleshooting for high OP per Cummins, but, a stuck regulator will cause it. Did your failure put debris into the oil pan? If so, godd possibility debris in the regulator.

Had the high pressure BEFORE the 50 yr old valve broke

 

[5_TON_TOMATOE]

Now that's its been run a few miles, it has 80 plus cold, and 40 + when hot- Think I'm good