That reading is pretty well normal for the Z134
-------------------------------------I just installed an oil pressure gauge on my 1955 Ferguson to-35. The old one had never worked, so I've never had an oil pressure reading.
I read in the manual that the oil pump has a release valve so the pressure doesn't go much above 30psi. After a cold start, the pressure is at 30psi, but once it's been running for a while it settles in around 21psi. At idle speed, it drops to around 10psi. Is this the proper oil pressure? Thanks.
i think the 15w helps it turn over eaiser when its cold, also the 40w helps keep the oil pressure up as the bearings wear.A couple of you stated you use 15W-40. What's the advantage of that over sae30? I think the owner's manual calls for the sae30.